Transmission Seven Year Capacity Statement
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TRANSMISSION SEVEN YEAR CAPACITY STATEMENT 2006/07 - 2012/13 System Operator for Northern Ireland Ltd. Transmission Seven Year Capacity Statement 2006 JAN UA RY 07 NU Y 200 7 FOREWORD The Transmission Seven Year Statement is required to comply with the Transmission and Public Electricity Supply Licence issued under the Electricity (Northern Ireland) Order 1992. This is the ninth publication of the Statement, the first having been issued in March 1993. This document is posted on the SONI internet subject to final approval by NIAER. System Operator for Northern Ireland Ltd. Transmission Seven Year Capacity Statement 2006 TRANSMISSION SEVEN YEAR CAPACITY STATEMENT For the years 2006/07 to 2012/13 The information used to compile this Statement is derived from the data archives of Northern Ireland Electricity (NIE) and the System Operator for Northern Ireland (SONI). Whilst all reasonable care has been taken in the preparation of this data, including its quality, accuracy, and completeness, NIE/SONI is not responsible for any loss that may be attributed to the use of this information. The use of this document and the information it contains is at the user’s sole risk. Furthermore, all interested parties are strongly advised to channel any enquires through NIE/SONI. This document may not be reproduced, in whole or in part, for any purpose, without the written permission of SONI. October 2006 © Copyright of SONI Ltd., October 2006. 12 Manse Rd, Belfast. BT6 9RT System Operator for Northern Ireland Ltd. Transmission Seven Year Capacity Statement 2006 SYSTEM OPERATOR FOR NORTHERN IRELAND LTD TRANSMISSION SEVEN YEAR CAPACITY STATEMENT For the years 2006/07 to 2012/13 Prepared October 2006 System Operator for Northern Ireland Ltd. Transmission Seven Year Capacity Statement 2006 2006 Transmission Seven Year Capacity Statement ______________________________________________________________________________ SYSTEM OPERATOR FOR NORTHERN IRELAND LTD. TRANSMISSION SEVEN YEAR CAPACITY STATEMENT CONTENTS Page EXECUTIVE SUMMARY ............................................................................................................... 4 1. INTRODUCTION....................................................................................................................6 2. MAIN TECHNICAL REQUIREMENTS OF THE SUPPLY SYSTEM ..................................... 10 2.1 SECURITY AND PLANNING STANDARDS....................................................................................... 10 2.2 ELECTRICITY SUPPLY REGULATIONS (NORTHERN IRELAND) ........................................................ 10 2.2.1 Frequency............................................................................................................................ 10 2.2.2 Voltage ................................................................................................................................ 11 2.3 GRID CODE REQUIREMENTS ....................................................................................................... 11 2.4 LICENCE (SYSTEM SECURITY AND PLANNING) STANDARDS.......................................................... 13 2.5 SYSTEM RELIABILITY, STABILITY AND QUALITY ......................................................................... 13 2.5.1 Overall ................................................................................................................................ 13 2.5.2 Increased Penetration of Wind Farm Power Stations............................................................ 14 2.5.3 Interconnection with GB ...................................................................................................... 14 3. THE NI TRANSMISSION SYSTEM...................................................................................... 16 3.1 THE EXISTING SYSTEM .............................................................................................................. 16 3.2 THE FUTURE PLANNED SYSTEM ± DEVELOPMENTS APPROVED ..................................................... 16 3.2.1 275/110kV Drumkee Substation - Phase 1............................................................................ 16 3.2.2 Coleraine capacitor............................................................................................................. 16 3.2.3 Kells-Coleraine 110kV circuit.............................................................................................. 16 3.2.4 Gortmullan 110/33kV BSP................................................................................................... 17 3.2.5 Whitla Street 110/33kV BSP................................................................................................. 17 3.2.6 Springtown 110/33kV BSP................................................................................................... 17 3.3 THE FUTURE PLANNED SYSTEM ± DEVELOPMENTS UNAPPROVED................................................. 17 3.3.1 A 400kV interconnector with RoI ......................................................................................... 17 3.3.2 Miscellaneous projects......................................................................................................... 17 3.3.3 275/110kV Drumkee Substation - Phase 2............................................................................ 18 3.4 SPECIAL PROTECTION SCHEMES ................................................................................................. 19 3.4.1 110kV Circuit Protection scheme Tandragee-Drumnakelly- Dungannon.............................. 19 3.4.2 Coolkeeragh Under Voltage Scheme.................................................................................... 19 3.4.3 Coolkeeragh Generation Curtailment Scheme...................................................................... 19 3.4.4 Ballylumford Generation Curtailment Scheme ..................................................................... 21 3.4.5 Wind Powered Generation ................................................................................................... 21 4. INTERCONNECTION........................................................................................................... 22 4.1 EXISTING INTERCONNECTION..................................................................................................... 22 4.1.1 275kV Tandragee ± Louth (RoI) Interconnector ................................................................... 22 4.1.2 110kV Interconnection......................................................................................................... 22 4.1.3 Interconnection with GB ...................................................................................................... 23 4.2 FUTURE INTERCONNECTION DEVELOPMENT................................................................................ 23 4.3 USE OF INTERCONNECTION......................................................................................................... 23 4.3.1 NI-GB.................................................................................................................................. 23 4.3.2 NI ± RoI............................................................................................................................... 24 System Operator for Northern Ireland Ltd. Transmission Seven Year Capacity Statement 2006 1 2006 Transmission Seven Year Capacity Statement ______________________________________________________________________________ 5. EXISTING GENERATION.................................................................................................... 25 5.1 GENERATION CAPACITY AGREEMENTS ....................................................................................... 25 5.1.1 Capacity Contracted to NIE through Power Purchasing Agreements (PPA¶s) ..................... 25 5.1.2 Independent Power Producer (IPP) Generation Capacity..................................................... 25 5.2 RENEWABLE GENERATION ......................................................................................................... 26 5.2.1 Non-Fossil Fuel Obligation (NFFO) Capacity...................................................................... 26 5.2.2 Additional Renewable Generation........................................................................................ 26 5.3 CUSTOMER PRIVATE GENERATION.............................................................................................. 26 5.4 GENERATION OPERATION........................................................................................................... 27 5.5 SPINNING RESERVE - LOAD SHEDDING ........................................................................................ 27 6. TRANSMISSION SYSTEM DATA .................................................................................... 28 6.1 FORECAST OF SYSTEM MAXIMUM DEMAND ................................................................................ 28 6.1.1 System Maximum Demand ................................................................................................... 28 6.1.2 System Maximum Demand Forecast..................................................................................... 29 6.2 110/33KV BULK SUPPLY POINT (BSP) DEMAND.......................................................................... 30 6.3 BUSBAR DATA........................................................................................................................... 31 6.4 CIRCUIT CAPACITIES AND PARAMETERS.....................................................................................