Flexible Connections for DG Customers

Transcription

1 Flexible Connections for DG s Session 1b: Connections Paul Pretlove UK Power Networks Ruth Kemsley Wind Prospect In partnership with:

2 Deployment Key outputs REQUIREMENTS Interface specification guidance document DESIGN Interface Design Functional design specification INSTALLATION COMMISSIONING Generator acceptance test schedule CONNECTION AGREEMENT Site responsibility schedule Signed connection agreement 2

3 Case Study: On-site Wind Generation Project 3

4 Case Study: On-site Wind Generation Project Key Criteria Firm Connection FPP Constrained Offer Capital Cost High Low Impact on revenue Delivery time None Longer, due to the additional infrastructure works Estimated low but with an element of risk Shorter, utilised existing infrastructure 4

5 Case Study: On-site Wind Generation Project Clear on the overall requirements Connection offer Significantly different from National Terms of Connection Draft Connection Agreement Indication of potential reduction in energy output Curtailment assessment Sufficient to achieve project Financial Close 5

6 Basic system architecture UK Power Networks Substation RTU SGS Connect M Measurement transducer Boundary Switchroom 6

7 Detailed Design Detailed list of signals Communication medium for each interface Data-point references and scalings Interface Design Schedule System architecture Constraint location Generator ramp rates ANM configuration Functional Design Specification 7

8 Detailed Design Key Learning Boundary Location UK Power Networks expect to manage the constraint at the boundary of the connection Failsafe arrangements Consideration should be given to the implications of the failsafe mechanism used Watchdog functionality Watchdog functionality is not always a standard in customer s and requires development Ramp rates Generation ramp rates must be discussed and agreed early as they affect the configuration of the wider active network management system 8

9 Case Study: On-site Wind Generation Project - System architecture UK Power Networks Substation SGS Connect Ring main unit Boundary Switchroom M Measurement transducer G59 Protection Relay Generator Control room Generator Wind Turbine Load PV System 9

10 Case Study: On-site Wind Generation Project - System architecture UK Power Networks Substation SGS Connect Ring main unit Boundary Switchroom M Measurement transducer G59 Protection Relay Generator Control room Generator Wind Turbine Load PV System 10

11 Case Study: On-site Wind Generation Project - System architecture UK Power Networks Substation SGS Connect Ring main unit Boundary Switchroom M Measurement transducer G59 Protection Relay Generator Control room Generator Wind Turbine Load PV System 11

12 Case Study: On-site Wind Generation Project - System architecture UK Power Networks Substation SGS Connect Ring main unit Boundary Switchroom M Measurement transducer G59 Protection Relay Generator Control room Generator Wind Turbine Load PV System 12

13 Case Study: On-site Wind Generation Project - System architecture UK Power Networks Substation SGS Connect Ring main unit Boundary Switchroom M Measurement transducer G59 Protection Relay Generator Control room Generator Wind Turbine Load PV System 13

14 Case Study: On-site Wind Generation Project Key Learning Start Early Detailed design for FPP interface started during detailed design phase of construction project Additional plant required Extra wind turbine control panel Balance of plant switchgear instrumentation and control Additional expertise required Final design not completed until later in the project 14

15 Installation activities Antenna Roof line Surge Suppressor UK Power Networks Substation SGS Connect Interface Cabling RF Mesh Ebridge 24V / 48V DC Power Supply responsibility DNO / responsibility 15

16 Connection agreement Connection Offer Detailed design First Draft Final Draft G59 certificate Signed copy Key Learning First draft includes export limits Clear definition of the project's status / priority within the FPP project 16

17 Commissioning ANM Core UK Power Networks SCADA RTU Communication SGS Connect M Measurement transducer Boundary 17

18 Commissioning ANM Core UK Power Networks SCADA RTU Communication SGS Connect M Measurement transducer Boundary 18

19 Commissioning ANM Core UK Power Networks SCADA RTU Communication SGS Connect M Measurement transducer Boundary 19

20 Commissioning ANM Core UK Power Networks SCADA RTU Communication SGS Connect M Measurement transducer Boundary 20

21 Commissioning ANM Core UK Power Networks SCADA RTU Communication SGS Connect M Measurement transducer Boundary 21

22 Commissioning ANM Core UK Power Networks SCADA RTU Communication SGS Connect M Measurement transducer Boundary 22

23 Commissioning Key Learning Precommissioning Wherever feasible, the interfaces should be tested prior to final commissioning Sequence of works SCADA commissioning is often programmed last but forms an integral part of the Flexible Plug and Play connection and should be delivered earlier G59 Witnessing The commissioning of the flexible plug and play equipment needs to be complete before the G59 witnessing Acceptance Period The flexible plug and play equipment will be operational over the customer acceptance period 23

24 Case Study: On-site Wind Generation Project Key Learning Precommissioning not possible Availability of technical resources Agreed intention to complete Flexible Plug and Play / turbine interface early, but struggled to engage with turbine control system supplier until later in process Final design completed later in the project due to the availability of technical resources from both project teams Satisfied overall Overall, Flexible Plug and Play offered a satisfactory and costeffective connection solution for the project Clear communication Familiarity with concepts was beneficial Progress throughout the entire process was well communicated by UK Power Networks project manager Wind Prospect were familiar with Flexible Plug and Play concepts and able to facilitate technical interface design between contractors - other customers may be less comfortable with Flexible Plug and Play issues 24

25 Key achievements of Flexible Plug and Play Engaged with 50+ DG developers Interviewed 20 Commissioned RF mesh wireless network for wide area comms Trialled two DG access principles: LIFO and Pro rata capacity quota Integrated and commissioned smart devices across 12 sites Made 40 connection offers: 15 accepted, 54.4MW enabled, 44m savings Developed analysis tool for investment options in DG dominated networks Installed and commissioned first quad-booster at 33kV Deployed IEC for interoperability between solution components Successful deployment of new commercial arrangements and interoperable smart grid components to deliver faster and cheaper DG connections For more information visit ukpowernetworks.co.uk/innovation 25