Facility Connection Requirements

Transcription

1 SEMINOLE ELECTRIC COOPERATIVE, INC. Facility Connection Requirements BULK ELECTRIC SYSTEM FACILITIES Facility Connection Requirements Page 1 of 19

2 Table of Contents 1. GENERAL CONNECTION REQUIREMENTS Responsibilities (Transmission Planning) Safety and Grounding (Substation Engineering) Design (Substation Engineering) Reliability and System Security (Substation Engineering & Transmission Planning) Protection (System Protection) Metering (System Operations) SCADA (System Operations) Insulation Coordination (Substation Engineering) Voltage, Frequency, and Power Factor Control (System Operations and Transmission Planning) Power Quality (Substation Engineering) Communications (Substation Engineering & System Operations) GENERAL OPERATING REQUIREMENTS Safety and Grounding (Substation Engineering) Operations (System Operations) Maintenance (Substation Engineering & System Operations) Metering (System Operations) Synchronizing Facilities (System Operations) Inspections (System Operations & Substation Engineering) Modifications (System Operations) GENERATOR CONNECTION REQUIREMENTS Configuration (Operations & Transmission Planning) Protection (Planning and Protection) Data and Communications (System Operations) Equipment Design (Operations) Ratings (Operations & Transmission) Islanding (Operations & Transmission) Voltage, Frequency, and Reactive Power (Operations) GENERATOR OPERATING REQUIREMENTS Operations (Operations) Maintenance (Operations) Voltage and Reactive Power (Operations) Facility Connection Requirements Page 2 of 19

3 4.4. System Stability (Operations) Communications (System Operations) TRANSMISSION CONNECTION REQUIREMENTS Facility Ratings (Transmission) Protection (System Protection) Data (System Operations) TRANSMISSION OPERATING REQUIREMENTS Operations (System Operations) END-USER CONNECTION REQUIREMENTS Protection (System Protection) Technical Considerations (Transmission & System Operations) Reactive Power (Transmission & System Operations) END-USER OPERATING REQUIREMENTS Reactive Operations (Transmission & System Operations) DEFINITIONS [THE REMAINDER OF THIS PAGE IS PURPOSELY BLANK] Facility Connection Requirements Page 3 of 19

4 1. GENERAL CONNECTION REQUIREMENTS 1.1. Responsibilities (Transmission Planning) The Interconnection Customer ( IC ) is responsible for the engineering design, procurement, construction, operation, and maintenance of the IC s equipment and for the safe protection of its own and associated equipment and electric system. The IC is also responsible for any liabilities for injuries to any property or persons, which can be associated with failure to perform in a proper and safe manner. The IC shall be responsible to protect its equipment from any conditions that may arise on the statewide transmission system, inclusive of Seminole Electric Cooperative, Inc. s ( Seminole s ) and/or the Members Bulk Electric System ( BES ), whether due to normal, abnormal, or system emergency conditions. The IC is also responsible for remaining compliant with all applicable Federal Energy Regulatory Commission ( FERC ), Florida Reliability Coordinating Council, Inc. ( FRCC ), North American Electric Reliability Corporation ( NERC ), Institute of Electrical and Electronics Engineers ( IEEE ), American National Standards Institute ( ANSI ), Underwriter Laboratory ( UL ), National Electric Safety Code ( NESC ), National Electric Code ( NEC ), and any additional applicable Industry Standard(s) at the time of interconnection and any new or modified applicable requirements and Standards that become effective or are updated after the date of interconnection Safety and Grounding (Substation Engineering) The IC s facility(ies) must have a ground grid designed to meet the latest requirements of ANSI/IEEE 80, the IEEE Guide for Safety in AC Substations, ANSI/IEEE C2, and any additional Industry Standards that are applicable. All metallic structures and non-energized metallic equipment shall be solidly grounded to the grid and this shall include the transmission line overhead ground wire. If the IC s substation is close enough to a Seminole and/or Member substation, the IC s substation ground and the Seminole or Member ground shall be bonded at the Point of Interconnection ( POI ). The IC is responsible for all upgrades required to Seminole and/or the Member s existing ground grid. Seminole and/or the Member may inspect the premises of the IC s substation before any required work is performed thereon and any unsafe conditions shall be corrected by the IC before any work is performed. Transferred voltages, and step and touch potentials must be limited to safe levels. Furthermore, testing must be performed to verify the integrity of the installed system, and results of such testing shall be made available to Seminole Design (Substation Engineering) The IC s POI shall be designed and engineered to meet or exceed all applicable Rural Utility Services (RUS), NESC, State and local construction codes and extreme wind loading requirements. All design, engineering, and material shall be in accordance with the latest versioning of the IEEE, UL, FERC, FRCC, NESC, National Electrical Manufacturers Association ( NEMA ), ANSI standards, and any additional applicable Industry Standards. All of the IC s Facility interconnection ratings shall be compatible with Seminole s existing and future connected equipment and shall not cause any of Seminole s existing Facility Facility Connection Requirements Page 4 of 19

5 Ratings to be de-rated or limited to a lessor value. All of the IC s equipment shall meet or exceed the fault duty requirements found in the latest studies and the application of circuit breakers shall be in accordance with the latest version of the ANSI/IEEE C37 Standards. If the new transmission or generation interconnection increases the available fault current above 80% of the nameplate interrupting current rating of existing Seminole and/or the Member s circuit breakers, new upgrades shall be considered as part of the interconnection project and any upgrade costs shall be the responsibility of the IC. Fault studies shall be performed by Seminole in accordance to Seminoles Short Circuit Analysis Guideline. Seminole and/or the Member shall review the design of the IC-owned transmission and substation prior to construction. If, in Seminole s judgment, the IC s proposed designs will adversely impact system reliability, necessary changes shall be proposed and agreed upon prior to start of construction. The IC's electric system on it s side of the POI shall be designed by a registered professional engineer, shall be installed by a licensed electrician and/or licensed contractor and must be approved by all applicable permitting and/or inspecting authority (if there is one or by any other authority having jurisdiction) prior to operation and interconnection with Seminole. The name, address, and telephone number of the design engineer, installation electrician/contractor, and inspector shall be provided, if requested by Seminole and/or the Member Reliability and System Security (Substation Engineering & Transmission Planning) Seminole and its Member s BES transmission system is designed and operated to meet FRCC Planning and Operating Standards and Guidelines and NERC Reliability Standards. The IC s Interconnected Facilities shall meet or exceed the requirements for all contingencies as defined in the NERC Transmission Planning (TPL-001-4) Reliability Standard, Table 1. In addition, at all Seminole and Member facilities, inclusive of the IC s facilities, every effort shall be made by the IC to minimize the adverse consequences to overall system stability. The IC s internal plant electrical system equipment design (e.g., transformers, tap settings, motors and other loads, generator/exciter, voltage regulator) shall not restrict any operation within Seminole s and/or its Member s BES transmission system's allowable voltage range and regulation. The interconnection shall not result in any condition where system voltages are outside the criteria of FERC, NERC, FRCC, or Seminole requirements. The resultant voltage at any location on the State Wide Transmission System, inclusive of Seminole and the Member s BES, for the loss of any single and/or multiple transmission contingency, should not cause system voltages to drop below per unit ( pu ). The following table summarizes Seminole s requirements regarding acceptable voltage ranges (in p.u.) by bus voltage level and contingency event: 1 For interconnections at 230 kv voltage class, resultant voltages due to the loss of any single or multiple transmission and/or distribution lines, shall not deviate beyond 0.95 per unit. Facility Connection Requirements Page 5 of 19

6 Phase-to- Phase Voltage No Contingency Normal Conditions (lower/upper limit) Post Contingency Seminole Owned 230 kv 0.95pu/1.05pu 0.95pu/1.05pu 115 kv 0.90pu/1.05pu 0.90pu/1.05pu 69 kv 0.90pu/1.05pu 0.90pu/1.05pu Seminole Member 230 kv 0.90pu/1.05pu 0.90pu/1.05pu Owned 138 kv 0.90pu/1.05pu 0.90pu/1.05pu 115 kv 0.90pu/1.05pu 0.90pu/1.05pu 69 kv 0.90pu/1.05pu 0.90pu/1.05pu The IC shall, upon approval by Seminole and/or the Member, install an interrupting device at the POI that is capable of safely and adequately disconnecting and isolating the IC's facility from Seminole s and/or the Members BES transmission system. The device shall be suitable for providing a "visible break" to satisfy safety requirements. The IC's facility shall be equipped and constructed so that it will immediately disconnect from a de-energized or faulted utility line. Additional protection requirements may be required depending on the configuration of the IC's facility and system characteristics Protection (System Protection) The IC is responsible for providing a protection system to protect its equipment against disturbances on Seminole s and/or the Member s BES transmission system and to minimize the effects of disturbances from its Interconnection Facilities on Seminole s and/or the Member s equipment and electric system. Operating voltage and proximity to generating units will be major considerations in the selection of the protection system(s) that will be required. Protection systems shall also be designed to meet all applicable IEEE Standards, FRCC guidelines and standards, NERC Protection and Control ( PRC ) Reliability Standards, and any additional applicable Industry Standards. The IC shall provide utility grade microprocessor relays that meet or exceed the latest versioning of IEEE/ANSI Standard C37.90 and any additional applicable Industry Standard or technical guidance document. Seminole s standard is to utilize Schweitzer Engineering Laboratories ( SEL ) microprocessor relays for most protection applications, including the use of Beckwith microprocessor relays for primary or back-up generator protection. Seminole requires the IC to utilize an SEL protection package in order to coordinate around the interconnection in order to maintain speed of operation, sensitivity, security, and reliability. At 100 kv and above, fully redundant backup protective systems are required and shall provide additional coverage for protective relay, communication system, instrument transformers (AC current source and AC voltage source), auxiliary relays, DC source (batteries, chargers, etc), DC control circuitry, and breaker trip coil failure. A generator circuit breaker failure scheme is required such that a generator circuit breaker failure to trip shall not result in a generator motoring. A generator sequential tripping scheme is highly recommended for steam turbines and gas turbines such that, on shutdowns other than protection trips, the prime mover is tripped first, followed by the generator breaker tripping Facility Connection Requirements Page 6 of 19

7 on a reverse power condition, in accordance with the IEEE Tutorial on the Protection of Synchronous Generators, 2nd Edition, section 5.1. The IC shall also ensure that its generation facility capability curve is coordinated with its over/under excitation limiters and all applicable protection functions of the generation protection, automatic voltage regulator ( AVR ), etc. Deadline reclosing is not to be a part of or incorporated in the system protection. Compatible relaying equipment shall be used to coordinate around the POI in order to maintain speed of operation, sensitivity, security, and reliability. Protective relay settings shall not limit transmission loadability or interfere with a system operators ability to take remedial action to protect system reliability. Relays shall be set to reliably detect all fault conditions and protect the transmission system from these faults. The IC shall coordinate with Seminole and the Member and receive approval for the protection design and settings for the IC s protection design and settings for the Interconnection Facilities. Any changes to protective equipment (including installation of a communication channel) on Seminole s or the Member's system required as a result of the interconnection will be considered as part of the equipment required to accommodate parallel operation and the cost of such equipment shall be considered part of the IC's interconnection cost Metering (System Operations) Each connection will be metered with bi-directional revenue class meters suitable for use with information / communications systems. Primary and backup revenue metering is required having an accuracy class which meets or exceeds 0.15% for instrument transformers. Metering class current and potential transformers are to be installed as close to the interconnection point as possible. The meters shall be capable of internal compensation where necessary. Typical generator and load metering requirements include the following: kw kwh kvar, leading and lagging kvar-hour Voltage (to monitor voltage schedule compliance) All metering instrument transformers installed must be strictly in accordance with the latest version of IEEE Standard C57.13 and, if applicable, ANSI Standard C93.1 or any other additional applicable Industry Standard(s). The metering arrangement will be subject to approval by the Member and Seminole before installation. Facility Connection Requirements Page 7 of 19

8 1.7. SCADA (System Operations) Each facility installation shall be evaluated separately for Supervisory Control and Data Acquisition ( SCADA ). In general and at a minimum, MWh and KQh delivered and received along with voltage, current, MW, MVAR, the status of circuit breakers, SF6 gas alarms and switches shall be provided. The control of pertinent circuit breakers and switches shall be the responsibility of only one party. When required, Seminole shall install, own, and maintain the SCADA devices, inclusive of the remote terminal unit ( RTU ) and telecommunication data circuit to the Seminole Energy Management Control Center ( EMCC ) at the IC s expense. An RTU may be required by Seminole for gathering customer load and equipment status information that will be telemetered back to Seminole EMCC. The IC shall provide a telecommunication data circuit to Seminole. The communication protocol for this data circuit(s) shall be specified by Seminole Insulation Coordination (Substation Engineering) Insulation coordination is the selection of insulation, with sufficient margin as defined by the applicable IEEE standards and any additional applicable Industry Standard. Insulation coordination must be performed in accordance with all applicable standards to ensure transmission system reliability and personnel safety. Insulation withstand voltages related, but not limited to power frequency, temporary overvoltages, fault overvoltages, resonance, ferroresonance, transformer energization, basic lightning impulse insulation level ( BIL ) and basic switching impulse insulation level ( BSL ) shall be documented and submitted for evaluation as part of the interconnection plan. In addition, design specifications related, but not limited to surge protection, conductor spacing, gap application, substation and transmission line insulation strength, other protection, and shielding shall be documented and submitted for evaluation as part of the interconnection plan. Seminole s standard is to shield substations and transmission lines from direct lightning impulses and to provide line entrance arresters at transmission line terminals. Surge arresters are also applied at major components and systems. Interconnection Facilities to be constructed in areas with contamination shall be properly designed to meet or exceed the performance of Facilities not in a contamination area with regard to contamination caused outages Voltage, Frequency, and Power Factor Control (System Operations and Transmission Planning) The POI of the IC s Generator or Interconnection Facilities shall not result in any condition where the voltage and/or frequency excursion is outside the acceptable criteria of the latest versioning of FERC, NERC, FRCC, or IEEE requirements, such as IEEE 1547 and its amendments, if applicable, or Seminole s requirements, and any additional applicable Industry Standard(s). The IC shall design, engineer, procure, and construct it s Generator and Interconnection Facilities such that they comply with the latest versioning of IEEE 1547 s anti-islanding, applicable voltage and frequency ride-through capabilities, and reactive support. The above Facility Connection Requirements Page 8 of 19

9 mentioned capabilities are also governed by the requirements set-forth in multiple FERC Order requiring small and large generating facilities to provide frequency and voltage support. Seminole and its Members shall require the IC to tune and commission the voltage, frequency, and reactive components within its generator package, inverter package or battery storage Power Quality (Substation Engineering) Any connection of a generator, transmission, or end-user facility load to Seminole s and/or its Members transmission system should not compromise or degrade the power quality of service to its existing customers. A permanent digital fault recorder or other monitoring and/or protective equipment may be deemed necessary and installed by Seminole at the POI to insure that power quality standards are met and maintained, and power quality events are captured and measured. The IC s design and operation shall also meet all applicable IEEE standards, FERC regulations, NERC reliability standards, FRCC guidelines, Florida Public Service Commission ( FPSC ) requirements, and any additional applicable Industry Standard(s), and associated reporting requirements. Power quality may include but not be limited to the following: Voltage unbalance Voltage flicker Voltage fluctuation Harmonic distortion Transient over voltage Temporary over voltage Temporary under voltage Interruption / outage frequency as may be required by regulatory standards Flicker will be assessed at the POI using an instrument in compliance with latest version of IEC , except that the weighting curve used to represent the response of the light bulb shall be based on the 120 volt lamp characteristics as recommended in UIE The flicker measured at the POI shall be 0.8 or less for the short-term flicker ( Pst ) and 0.6 or less for the long-term flicker ( Plt ). The Pst and Plt values measured shall not be exceeded more than 1% of the time based on a probability distribution calculated for a oneweek period Communications (Substation Engineering & System Operations) Complete, precise, and timely communication is an essential element for maintaining reliability and security of a power system. Under normal operating conditions, the major link of communication with various interconnects shall be by telephone lines and/or fiber. Seminole and the IC should detail communication requirements in the specific interconnection agreement between the Parties. However, if the interconnection agreement is silent on this subject matter, then the IC shall maintain communications that shall include, but not be limited to, system paralleling or separation, scheduled or unscheduled shutdowns, equipment clearances, periodic load reports, maintenance schedules, tagging of Facility Connection Requirements Page 9 of 19

10 interconnection interrupting devices, meter tests, relay tests, billing, and other routine communication. Emergency telephone numbers must be agreed upon by the interconnecting parties prior to the actual connect date. In case of general widespread area announcements, Seminole may also use public announcements through radio and television stations. 2. GENERAL OPERATING REQUIREMENTS 2.1. Safety and Grounding (Substation Engineering) Trained switchmen shall perform switching functions within the facility under the direction of a responsible system coordinator as outlined in the latest edition of the NESC and performed in compliance with the Occupational Safety and Health Administration ( OSHA ) guidelines. Any work being performed within a facility shall, at all times, be carried out in accordance with the applicable laws, rules and regulations, and Good Utility Practices. Rules for switching, tagging, and grounding shall be established and the procedures followed to ensure safe working conditions. Seminole and the Member may inspect the premises of the IC s facilities before any required work is performed thereon and any unsafe conditions shall be corrected by the IC before any work is performed Operations (System Operations) The IC shall comply and operate in accordance with IEEE, NERC reliability standards, FRCC guidelines, and any additional applicable Industry Standard(s) related to the operation and reliability of the transmission system. Current station operating diagrams shall be provided with agreed upon nomenclature for all lines, circuit breakers, switches, etc., and in accordance with Seminole s Corporate Procedure OP-6. The IC shall not energize or deenergize any portion of the Seminole transmission system or perform any switching which will significantly affect voltages or power flows without prior agreement of Seminole s Operating Representative as designated in Section 10.1 of this document. The control of pertinent circuit breakers and switches shall be the responsibility of only one party, and this will be the subject of discussion and form part of the interconnection agreement. Future installation of communication equipment for the purpose of supervisory control and data acquisition may be necessary and will be at the expense of the IC Maintenance (Substation Engineering & System Operations) Maintenance of the IC s facilities shall be the responsibility of the IC and shall be carried out in accordance with Good Utility Practice. Seminole shall not be required to open its own circuit breakers or transmission line in order for a normal maintenance outage to proceed. The interconnecting parties shall coordinate inspections, planned outages, and maintenance of their respective equipment, facilities and systems to minimize the impact on the availability, reliability and security of both interconnecting parties systems and operations. Each interconnecting party shall provide the other with reasonable notification for routine maintenance, operational tests, and inspection activities. For such activities that do not require major equipment or system outages, the party performing the maintenance shall provide the other interconnecting party with at least twenty-four (24) hours prior written Facility Connection Requirements Page 10 of 19

11 notice. For such activities that will require major equipment or system outages, the interconnecting party performing the maintenance shall provide the other interconnecting party with not less than five (5) Business Days prior written notice Metering (System Operations) Calibration tests shall be performed annually and witnessed by all parties. At all other times the meters shall be sealed. Seminole and/or the Member or its representatives or agents will be allowed 24-hour access to a meter installation where practical, but at no time will it be denied access during routine working hours Synchronizing Facilities (System Operations) Transmission breakers are closed to connect two energized lines only after the phase angle across the breaker is verified. This is accomplished by utilization of an auto synchronizing relay (ANSI 25). The control scheme shall be designed to initiate a close only after a synchro-verifier relay determines that the angle and voltage are within preset limits. Manual closing may only be permitted at the discretion of the Seminole EMCC in the event of a short term failure of the auto synchronizing relay Inspections (System Operations & Substation Engineering) Each interconnecting party shall perform routine inspections and testing of its facilities and equipment, including secondary low voltage control systems, in accordance with Good Utility Practice as may be necessary to ensure the continued interconnection of the IC s Interconnection Facilities with Seminole s electric system in a safe and reliable manner. Each interconnecting party shall, at its own expense, have the right but not the obligation to observe the testing of any of the other party s Interconnection Facilities and equipment whose performance may reasonably be expected to affect the reliability of the observing party s facilities and equipment. Each party shall notify the other party thirty (30) calendar days in advance of its performance of non-emergency tests of its Interconnection Facilities and equipment, and the other party may have a representative attend and be present during such testing. If a party observes any deficiencies or defects on, or becomes aware of a lack of scheduled maintenance and testing with respect to, the other party s Interconnection Facilities and equipment that might reasonably be expected to adversely affect the observing party s Interconnection Facilities and equipment, the observing party shall provide notice to the other party that is prompt under the circumstance, and the other party shall make any corrections required in accordance with Good Utility Practice Modifications (System Operations) Any changes to the generation, transmission or end-user Interconnection Facilities, which are to be made subsequent to the in-service date, must be submitted to Seminole for review prior to the modifications being included in the construction. Modifications include changes to the protection scheme or settings and changes in the metering setup. Increases in fault levels due to system changes must also be provided. Any planned modification to the existing Interconnection Facilities shall be provided in writing to the Seminole s Operating Representative with no less than 45 calendar days to review the impact of the proposed changes. Facility Connection Requirements Page 11 of 19

12 3. GENERATOR CONNECTION REQUIREMENTS 3.1. Configuration (Operations & Transmission Planning) The potential adverse effects of maintenance and outages shall be considered in the design of the generating plant and the Interconnection Facilities. Facilities shall be configured such that a single contingency event does not result in a loss greater than the current FRCC Florida Reserve Sharing Group ( FRSG ) Most Severe Single Contingency ( MSSC ) of generation or the loss of Seminole s MSSC, equivalent to approximately 650 MW. The design of the IC s Generator controls and systems, as well as the Interconnection Facilities, shall be reviewed by Seminole prior to engineering and construction. Designs to ensure the maintenance of system stability may require looped transmission connection involving a breaker and a half, ring bus, or double breaker schemes. This will be the case when a generator is connected at the end of a line tapped off a Seminole network transmission line. The switching station will be configured so that a single contingency on the facility side of the POI does not interrupt the continuity of the Seminole transmission line. The arrangement shall be subject to Seminole approval and shall be designed to accommodate normal and emergency ratings with a margin for uncertainty in operating conditions, load growth, and planned FRCC transmission interconnections Protection (Planning and Protection) The generator shall be able to instantly support the interconnected transmission system and not trip during temporary excursions in voltage and frequency pursuant to IEEE, FRCC, NERC reliability standards, and any additional applicable standard(s). The generator, and its associated controls, shall be designed to remain synchronized and/or on-line for normally cleared, close in faults on the transmission system which may result in a low system voltage and frequency, as well as applicable time-delayed clearing that results in remote clearing. Associated control systems, inverters, motors, etc., which are critical to plant operation must have the ability to ride-through these conditions, in accordance with the applicable industry standards and guidelines mentioned above and throughout this document. The IC shall coordinate with Seminole and receive prior approval for the protective relaying design and settings from Seminole. It is the IC s responsibility to protect the IC s generator from hazardous conditions that may occur on the transmission system. In addition, the IC must meet all FERC, FRCC, NERC, IEEE technical and protection setting requirements (and any additional applicable Industry Standard(s)) applicable to the IC s generator, such as IEEE 1547 and its amendments Data and Communications (System Operations) The IC shall provide real time data to the Seminole EMCC. The data will include generator MW/MVAR net output at low side (with compensation to the GSU high side), terminal voltage, and high side voltage. The status of all circuit breakers, switches, and automatic voltage regulators shall also be provided. The IC shall provide standard voice line, dedicated voice line and facsimile communications at its facility control room through use of the public telephone system. The IC shall also provide the dedicated data circuit(s) necessary to provide necessary generator data to Facility Connection Requirements Page 12 of 19

13 Seminole. The data circuit(s) shall extend from the generator facility to a location(s) specified by Seminole Equipment Design (Operations) The facility must follow all applicable IEEE, FRCC guidelines, NERC reliability standards, and any additional applicable Industry Standard(s). Generators are to be equipped with an AVR capable of maintaining the specified output voltage within limits for generator loading from no load to full rated output. Generators connected to the Seminole transmission system shall maintain a network voltage or reactive power output as specified within limits of the generating equipment. Generators with a nameplate rating of 200 MVA or greater shall be equipped with a tuned Power System Stabilizer that may be required to be commissioned based upon stability studies or at a later date as a result of FRCC stability studies. The speed / load droop characteristic is typically set at 5% in Florida and generators with a nameplate rating of 20 MVA or greater shall be equipped with a speed / load governing control with a speed droop characteristic in the 36% range. Generators shall have an overexcited power factor capability, measured at the generator terminals, of 0.90 or less and an under excited power factor capability of 0.95 or less Ratings (Operations & Transmission) If the IC s generating facility increases available fault currents at other facilities, then circuit breaker upgrades shall be considered part of the interconnection. Should any increase affect ratings of overhead lines, ground wires, etc., these again will be considered part of the interconnection. Facility interconnection ratings shall be compatible with the Seminole connected equipment. Circuit breakers and fault interrupting devices shall be capable of safely interrupting fault currents found to be probable from the interconnection study. The circuit breakers shall be applied in accordance with the latest version of ANSI/IEEE C37 standards. Substation bus bar shall be rated in accordance with the latest ANSI/IEEE 605 standard and overhead lines rated in accordance with the latest ANSI/IEEE 738 standard. Insulation withstand voltages (e.g., basic lightning impulse insulation level (BIL)), wind loading figures, and other ratings shall be subject to Seminole approval Islanding (Operations & Transmission) Should the IC s generator connect to a transmission line having other tapped load, there will be an additional requirement to prevent islanding. For the purpose of this document, islanding is defined as a generator being isolated such that it is the only source of power to a utility customer. The IC s protection system shall be responsible for sensing abnormal frequency and voltage and trip its own generator breaker to isolate from Seminole and/or the Members system. Seminole may also elect to install anti-islanding protective equipment and direct transfer trip DTT elements on its adjacent facilities to provide protection of its system in event of any failures associated with the IC s protection systems at the POI. In addition, the IC must meet all FERC, FRCC, NERC, IEEE technical requirements, any additional applicable Industry Standard(s), applicable to the IC s generator covering islanding, such as IEEE 1547 and its amendments, and the IC has an obligation to remain compliant with applicable FERC, FRCC, NERC, and IEEE requirements if additional requirements become effective or current requirements are updated that are applicable to the generator. Facility Connection Requirements Page 13 of 19

14 3.7. Voltage, Frequency, and Reactive Power (Operations) Generator facilities connecting directly to the transmission system at 69 kv or higher voltages will comply with all applicable FERC orders, NERC reliability standards, applicable Industry Standard(s), and FRCC standards and guidelines, applicable operating and/or reliability criteria and the generator s interconnection agreement, as such documents may be amended from time to time, with regard to voltage support and supply of reactive power to the transmission system. All generator facilities connecting to the transmission system at 69 kv or higher voltages shall operate in automatic voltage regulation. A generator voltage regulator is required to be in service and in automatic mode whenever the generator is synchronized to Seminole s transmission system. Unless otherwise directed by Seminole, the automatic voltage regulator shall, within the reactive capabilities of the generator, control the voltage output pursuant to the voltage schedule prescribed by Seminole. 4. GENERATOR OPERATING REQUIREMENTS 4.1. Operations (Operations) Connecting and disconnecting the IC s generating facility to or from Seminole s and/or a Members transmission system shall always require a Seminole system coordinator s approval. Disconnections without prior approval are permitted only when necessary to prevent injury to personnel or damage to equipment Maintenance (Operations) The IC shall maintain its facilities and equipment, to the extent the IC might reasonably be expected to have an impact on the operation of the facility in a safe and reliable manner, in accordance with Good Utility Practice and in accordance with the provisions of this document. Any required maintenance of communications equipment shall be performed at IC's expense, but may be performed by IC or by Seminole. Seminole shall have the right, but shall have no obligation or responsibility to: i. Observe the IC's tests and/or inspection of any of the IC's system protection facilities and other protective equipment; ii. Review the settings of the IC's system protection facilities and other protective equipment; and iii. Review the IC s maintenance records relative to the facility, Generator, Interconnection Facilities, and/or the IC s system protection facilities and other protective equipment Voltage and Reactive Power (Operations) Generator step-up and auxiliary transformers shall have their tap settings coordinated with Seminole s transmission system voltage requirements. Seminole shall have the right to alter the voltage schedule as the system operating conditions may require from time to time. The IC shall meet all FERC, FRCC, NERC, IEEE technical requirements, and any additional applicable Industry Standard(s), applicable to the IC s generator covering voltage and reactive power, such as IEEE 1547 and its amendments, and the IC has an obligation to remain compliant with applicable FERC, FRCC, NERC, and IEEE requirements if additional Facility Connection Requirements Page 14 of 19

15 requirements become effective or current requirements are updated that are applicable to the generator. When Seminole and/or the Member declares an emergency condition on its electric system, it shall have the authority to direct the IC to increase or decrease real power production (measured in MW) and/or reactive power production (measured in MVAR), within the design and operational limitations of the facility equipment in service at the time, in order to maintain electric system security. In the event of a declaration of an emergency condition, a determination: (i) that the transmission system security is in jeopardy, and (ii) that there is a need to increase or decrease reactive power production, even if real power production is adversely affected, will be made by Seminole and/or the Member, if Seminole and/or the Member is the Transmission Operator, as defined by NERC, for the area where the IC s Generator is located. The IC will honor Seminole s and/or the Member s orders and directives concerning facility real power and/or reactive power output within the design limitations of the facility s equipment in service at the time, such that the security of the electric system is maintained. Seminole and/or the Member shall restore electric system conditions to normal as quickly as possible to alleviate any such emergency condition. Seminole or the Member will take all reasonable steps to allocate among all generating units and other reactive power supply resources the responsibility to provide reactive power support to the electric system. The IC s generator is expected to maintain the voltage schedule as required by Seminole s Operating Representative within the reactive capability of the generating units. Seminole requires the IC to keep detailed records as to when each generating unit does not comply with the Operating Representative s schedule. The IC shall be responsible for providing detailed reports on voltage deviations from the acceptable voltage ranges for a specified time period when requested by the Cooperatives, FRCC or NERC (within 30 calendar days of the request). Any time the IC plans to replace any of the step-up or auxiliary transformers, the IC shall supply data relating to the transformer (e.g. size and type, available tap settings, impedance data, loss data etc.) to Seminole for the purpose of determining the optimum tap setting. When tap changes are necessary, Seminole shall provide the IC with a report that justifies the required tap setting changes and technical justification for these changes. As required by applicable NERC reliability standards, the IC shall maintain detailed records of each generator step-up transformer and auxiliary transformer that shall include type of transformer, rating, nominal voltages, existing and available taps, impedance and loss data. It shall be the responsibility of each IC to provide the above information on step-up and auxiliary transformers (within five business days) when requested by Seminole, the FRCC or NERC System Stability (Operations) The IC shall operate its facility with the appropriate safeguards, power system stabilizers (if required to be commissioned) and other protective equipment necessary to protect and prevent damage to Seminole s transmission system, including operating the facility generator Facility Connection Requirements Page 15 of 19

16 unit with its speed governors and voltage regulators in service at all times. Should automatic functions not be available or should they fail to operate, including any voltage regulator, the IC shall immediately notify Seminole s Operating Representative. The IC shall repair these same systems as quickly as it is reasonably possible to do so, dependent upon the availability of replacement systems or parts and the stability of Seminole s electric system. The IC shall accept any operating restrictions necessary during the outage of automatic function of such equipment. The IC shall be responsible to protect its own facilities against instability resulting from disturbances on Seminole s electric system Communications (System Operations) The IC shall maintain satisfactory operating communications with Seminole s Operating Representative. 5. TRANSMISSION CONNECTION REQUIREMENTS 5.1. Facility Ratings (Transmission) The IC s Facility ratings shall be compatible with Seminole s or the Member s connected equipment. Circuit breakers and fault interrupting devices shall be capable of safely interrupting fault currents identified by the short circuit analysis. The IC s circuit breakers shall be applied in accordance with the latest ANSI/IEEE C37 standards. Substation bus bar shall be rated in accordance with the latest ANSI/IEEE 605 standard and overhead lines rated in accordance with the latest ANSI/IEEE 738 standard. Insulation withstand voltages (e.g. basic lightning impulse insulation level, wind loading figures, and other ratings shall be subject to Seminole or Member approval Protection (System Protection) Protection equipment settings shall meet all currently enforceable IEEE, FRCC, FERC, and NERC Reliability Standards, and shall stay in compliance with said applicable Standards. It is the IC s responsibility to protect its facilities from hazardous conditions that may occur on the transmission system. The recommendation is that relays protecting an IC s owned transmission line should not operate at or below 150% of the emergency ampere rating of the line at 0.85 p.u. voltage with a phase angle of 30 degrees. The IC shall coordinate and receive approval from Seminole or the Member for the protective relay scheme design and settings prior to implementation Data (System Operations) In general, the IC shall provide real time data to the Seminole EMCC which will include, but may not be limited to, MWh received and delivered and kqh received and delivered. Instantaneous three phase voltages and currents, MW and MVAR shall also be supplied and circuit breaker and switch status. Facility Connection Requirements Page 16 of 19

17 6. TRANSMISSION OPERATING REQUIREMENTS 6.1. Operations (System Operations) Each interconnecting party will designate an Operating Representative who will address lines of communications, coordinate maintenance, decide on actions after de-energization and carry out all operating procedures. The IC shall comply and operate in accordance with NERC Reliability Standards and FRCC guidelines related to the operation and reliability of the transmission system. Current station operating diagrams shall be provided with agreed upon nomenclature for all lines, circuit breakers, switches, etc. The IC shall not energize or de-energize any portion of the Seminole and/or Member transmission system or perform any switching which will significantly affect voltages or power flows without the agreement of Seminole s Operating Representative. Seminole s Operating Representative shall closely coordinate with the Member on all operating activities associated with the IC that is interconnected to the Members transmission system. For transmission interconnections to any portion of the Members BES transmission system, Seminole shall operate and direct operations on behalf of the applicable Member. The IC shall normally operate in parallel with Seminole s and/or the Members transmission system. The IC shall advise Seminole s Operating Representative when any switching is to be carried out and the IC shall not perform any switching that energizes or de-energizes part of Seminole s transmission system. Seminole s or the Member s switching and safety procedures shall be strictly adhered to when maintenance is being performed at the interconnection. Automatic reclosing shall be handled on a case by case basis and the direction of restoration shall be the subject of agreement. The IC shall be responsible for providing reactive compensation where necessary and shall not require Seminole to supply or absorb reactive power in order to operate under normal and abnormal conditions. 7. END-USER CONNECTION REQUIREMENTS 7.1. Protection (System Protection) The IC shall be responsible for providing a protection system that will protect its equipment against disturbances on Seminole's and/or the Members transmission system. In addition, the IC shall protect Seminole's and/or the Member s equipment and transmission system from the effects of disturbances on the IC s facilities Technical Considerations (Transmission & System Operations) Generally, connection of end-user load to transmission facilities should be considered for the following conditions: All end-user load over 20 MVA Locations remote from distribution facilities Remote locations where distribution facilities are not adequate End-user with nonstandard voltage requirements End-user having large surge requirements (such as non linear loads) Facility Connection Requirements Page 17 of 19

18 The feasibility of serving end-users direct from transmission requires a comprehensive study and coordination. Factors to be considered prior to agreeing with an end-user interconnection are as follows: Economics of alternates Transmission line tap or loop length End-user transformer characteristics End-user switching requirements Effect on protective relaying at remote terminals Large through flow on looped lines Extent of end-user facilities Whether the IC has internal generation 7.3. Reactive Power (Transmission & System Operations) Unless otherwise agreed, the transmission end-user IC is required to design its facilities to maintain a power factor within the same range as Seminole s facilities pursuant to Good Utility Practices. 8. END-USER OPERATING REQUIREMENTS 8.1. Reactive Operations (Transmission & System Operations) The transmission end-user IC shall maintain a geographically aggregated minimum power factor of 93.0% lagging as measured at the POI at the time of the Seminole coincident summer and winter seasonal peaks. The transmission end-user IC shall not exceed a geographic aggregated maximum of 99.0% leading as measured at the POI during the Seminole coincident spring and fall off-peak seasons. [THE REMAINDER OF THIS PAGE IS PURPOSELY BLANK] Facility Connection Requirements Page 18 of 19

19 9. DEFINITIONS Capitalized terms not identified within this document shall take on the meanings as defined within NERC s Glossary of Terms Used in NERC Reliability Standards. Good Utility Practice Any of the practices, methods and acts engaged in or approved by a significant portion of the electric industry during the relevant time period, or any of the practices, methods and acts which, in the exercise of reasonable judgment in light of the facts known at the time the decision was made, could have been expected to accomplish the desired result at a reasonable cost consistent with good business practices, reliability, safety and expedition. Good Utility Practice is not intended to be limited to the optimum practice, method, or act to the exclusion of all others, but rather to be acceptable practices, methods, or acts generally accepted in the region over which the Florida Reliability Coordinating Council, or its successor, has authority. Industry Standards Shall include, but not be limited to, IEEE, ANSI, UL, NEC, NEMA, NESC, state, county and local code, etc. Interconnection Customer (IC) a Party desiring to interconnect to Seminole s, or one of its Member s, transmission or generation facilities. Interconnection Facilities All lines, wires and equipment, including metering and system protection equipment, which are necessary to permit the interconnection of the Interconnection Customer s facility(ies) with Seminole s electric system. This includes any modification, additions or upgrades that are necessary to physically and electrically interconnect the Interconnection Customer s facility(ies) with Seminole s electric system. Point of Interconnection (POI) The point of change in ownership where the IC s interconnection facilities connect with Seminole s interconnection facilities and/or electric system. Seminole in the context of this document, this term includes Seminole Electric Cooperative, Inc. and any and all of its nine (9) Members. Member Any of Seminole Electric Cooperative, Inc. s nine (9) member electric cooperatives. This includes Central Florida Electric Cooperative, Inc., Clay Electric Cooperative, Inc., Glades Electric Cooperative, Inc., Peace River Electric Cooperative, Inc., SECO Energy, Suwannee Valley Electric Cooperative, Inc., Talquin Electric Cooperative, Inc., and Tri-County Electric Cooperative, Inc. Facility Connection Requirements Page 19 of 19