Preparing for the unexpected: Transmission Planning in ERCOT

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1 Preparing for the unexpected: Transmission Planning in ERCOT 2014 Transform TX January 29, 2014 Hala N. Ballouz, PE Electric Power Engineers, Inc.

interconnection Congestion and curtailment analysis Market pricing and

2 In business since 1968 Consulting to electric utilities and private generators Transmission grid deliverability analysis Management of grid interconnection Congestion and curtailment analysis Market pricing and nodal analysis Design & Equipment grid compliance Owner s Engineer, testing, inspection

3 s ERCOT Generation Interconnection Customer: Hey, I have a 50 MW generator at Friend Ranch ISO We should be fine, plenty of capacity there..will run a study anyways!

4 4 Screening Study delivered to IE 2014 ERCOT Interconnection Process IE commits to proceed FIS Scope agreed upon (IE and TSP) FIS complete IA signed by TSP and IE ERCOT Standards Review delivered to IE GINR Request (FEE) Screening Study (SSR if required) 90 Day Limit 45 day target Resource Decision to Proceed 180 day limit FIS Request (Fee) FIS Scope Meeting Full Interconnect Studies SS; Fault Dynamic; Fac. <Economic>; <SSR> TSP ERCOT Review FIS & ERCOT Approval Negotiation Of Interconnection Agreement 180 day limit ERCOT Assess standards 60 day limit Registration of RE (IE Transitions to an RE) Proposed Energization Date (PED) identified Model Ready Date (MRD) identified RE submits RARF EPS meter design proposal from TSP QSE Pts list received from QSE based on Scada Plan Telemetry Additions set up for MRD EPS meter design proposal date ESIID active In Loadstar Outage Scheduling Coordinated & Commissioning Plan submitted Meteorological tower requirements are met Compliance with Operating Stds. checked SCADA Confirmed Request to commission POI approved Request For initial synch. approved Test Reactive Capability Request To begin Commercial Operations approved First time to be energized Initial Synchro nization Source: ERCOT Guide To The Interconnection Process Version 1.0 Commercial Operation Date (COD)

5 5 1990s Technical Grid Requirements Are the conductors large enough?

6 Technical Grid Compliance Requirements 1. Thermal Limitations (Are the Conductors Large Enough!) 2. Voltage Ride-Through (VRT) Requirements for IRRs (Nodal Operating Guides Section 2.9) 3. Frequency Relaying Requirements (Nodal Operating Guides section 2.6.2) 4. Reactive Power Support Requirements (Nodal Protocols section 3.15) 5. Ramp-up Rate Requirements (Nodal Protocols section ) 6. Primary Frequency Response (PFR) Requirements (Nodal Protocols section ) 7. Sub-Synchronous Interaction (SSI) Section 5 of ERCOT Planning Guides

7 IA: Interconnection Agreement FC: Financial Commitment COD: Commercial Operating Day 7 Panhandle Wind Signed IA Projects IA Capacity (MW) FC Capacity (MW) IA Signed Projected GINR ProjectName County Date COD 11INR0050 Moore Wind 1 Crosby /12/2012 8/8/ INR0005 Conway Windfarm Carson /24/ /1/ INR0023 Longhorn Energy Center Briscoe /10/ /1/ INR0030a2 Panhandle Wind Carson /19/2012 8/1/ INR0010a Mariah Wind Parmer /31/ /30/ INR0010b Mariah Wind Parmer /31/ /31/ INR0010c Mariah Wind Parmer /31/ /31/ INR0048 Spinning Spur Wind Two Oldham /27/2013 6/1/ INR0012a Miami Wind 1 Project Gray /1/2013 7/31/ INR0012b Miami Wind 1 Project Gray /1/2013 8/15/ INR0059a Hereford Wind Castro /10/2013 9/4/ INR0059b Hereford Wind Castro /10/2013 4/15/ INR0029 Comanche Run Wind Swisher /24/ /31/ INR0030b Panhandle Wind (Ph2) Carson /2/2013 9/1/ INR0032a Route66 Wind Randall /31/ /1/ INR0018 Pampa Wind Project Gray /12/2013 3/31/ INR0053 Spinning Spur Wind Three Oldham /10/ /31/2014 4,516 2,505

8 8 Roadmap- Panhandle Export Limit Transmission Upgrades needed

9 Large Generator Interconnection Process Issues? 9 Time Cost Transmission Reliability Limitations

10 Resource Mapping 10 Collaboration In Resource Development Map the Resources Provide Ancillary Services OPTIMIZE

Resource Side Planning Lessons Learned 11 Levelized Load

ENERGY STO R A G E HOUR OF DAY Understanding of the

key to project success Being informed about the

choosing LOCATION for a resource Collaboration amongst

11 Resource Side Planning Lessons Learned 11 Levelized Load Cycle Actual Load Cycle STORAGE DISCHARGE STORAGE CHARGE ENERGY STO R A G E HOUR OF DAY Understanding of the intricate interconnection process and requirements is key to project success Being informed about the transmission grid present and future limitations for choosing LOCATION for a resource Collaboration amongst all Resource Sectors in sketching a map for successful co location of resources

12 QUESTIONS 12 Hala Ballouz, President

TRANSMISSION ENGINEERING STANDARDS SUBSTATIONS

TRANSMISSION ENGINEERING STANDARDS SUBSTATIONS This standard was reviewed and approved by key managers on. Officer approval of this revision is not required. 1.0 SCOPE 1.1 This guide applies to the interconnection of a generating plant with the Oncor