SECURITY OF SUPPLY PARTICIPANT ROLLING OUTAGE PLAN ELECTRICITY NETWORK CONTINGENCY PLAN NW20.40.09 Orion NZ Ltd. Contingency Plan Security of Supply Participant Rolling Outage Plan DETAILS OF DOCUMENT AMENDMENT No.05 Section Description of amendment amended 3 Definition NW20.40.05 EC rules changed to Authority Rules 3 Definition SORCP added 7 Orion street address changed 8.2.1.1 Transpower responsibility in the South Island 8.2.1.2 Relay ownership 9 Orion legal obligation added 10 Declaration of category A Event: added reference to Public Conservation Campaign 11.1 Updated Priority Loads 16 Updated indicative plans for savings 20 Appendix A – Rolling Outage feeders updated 22 Appendix C – Rolling Outage Public Notice updated The latest amendments are marked with a vertical line against the left margin and red text. Issue Date 11.12.2014 NW20.40.09 Amendment No.05 Page 2 of 37 Orion NZ Ltd. Contingency Plan Security of Supply Participant Rolling Outage Plan TABLE OF CONTENTS 1. INTRODUCTION ............................................................................................................... 5 2. PURPOSE ......................................................................................................................... 5 3. DEFINITIONS .................................................................................................................... 5 4. BACKGROUND ................................................................................................................ 6 5. RANGE OF EVENTS ........................................................................................................ 6 6. ORION STAFF RESPONSIBILITIES ............................................................................... 7 7. COMMUNICATION WITH THE SYSTEM OPERATOR ................................................... 7 8. ACTIONS FOR IMMEDIATE (CATEGORY B) EVENTS ................................................. 8 9. DEVELOPING (CATEGORY A) EVENTS ........................................................................ 9 10. DECLARATION OF CATEGORY A EVENT ................................................................ 9 11. CRITERIA FOR ROLLING OUTAGES ........................................................................ 9 12. AUFLS UNDER ROLLING OUTAGES ...................................................................... 11 13. SHUTDOWN NOTIFICATION .................................................................................... 12 14. COMMUNICATION WITH SYSTEM OPERATOR ..................................................... 12 15. GRID EMERGENCY DURING CATEGORY A EVENT ............................................. 12 16. ROLLING OUTAGES STRATEGY AND METHODOLOGY ...................................... 12 17. TARGET MONITORING ............................................................................................. 16 18. LOG OF ROLLING OUTAGES .................................................................................. 16 19. CONTINGENT EVENTS ............................................................................................. 16 20. APPENDIX A – ROLLING OUTAGE FEEDERS ....................................................... 17 21. APPENDIX B – ROLLING OUTAGE LOG ................................................................. 36 22. APPENDIX C – DRAFT ROLLING OUTAGE PUBLIC NOTICE ............................... 37 Issue Date 11.12.2014 NW20.40.09 Amendment No.05 Page 3 of 37 Orion NZ Ltd. Contingency Plan Security of Supply Participant Rolling Outage Plan Issue Date 11.12.2014 NW20.40.09 Amendment No.05 Page 4 of 37 Orion NZ Ltd. Contingency Plan Security of Supply Participant Rolling Outage Plan 1. INTRODUCTION This plan was written to comply with the Electricity Industry Participation Code 2010, Part 9 Security of Supply. The procedures outlined are in response to major generation shortages and/or significant transmission constraints. Typical scenarios include unusually low inflows into hydro- generation facilities, loss of multiple thermal generating stations or multiple transmission failures. How an event is declared and how the System Operator should communicate its requests are detailed. The main energy saving measure listed is rolling outages and how these are structured and implemented is discussed. 2. PURPOSE Under the Code, participant rolling outage plans (PROP) are required to specify the actions that would be taken to; a) be consistent with the system operator rolling outage plan; and b) comply with the requirements specified in the notice sent under clause 9.6(2)(a) of the code; and c) specify the actions that Orion will take to achieve, or contribute to achieving, reductions in the consumption of electricity (including any target level of reduction of consumption of electricity in accordance with criteria, methodologies, and principles specified on the system operator rolling outage plan) to comply with a direction from the system operator. Reducing demand by disconnecting supply to customers would be a last resort after all other forms of savings including voluntary savings had been exhausted. Orion will always endeavour to keep supply on to customers. 3. DEFINITIONS Act Electricity Industry Act 2010 AUFLS Automatic under Frequency Load Shedding Authority Electricity Authority Code Electricity Industry Participation Code 2010 Feeder A high voltage supply line typically supplying between 100 and 2000 customers. GXP Transpower grid exit point GEN Grid Emergency Notice PROP Participant Rolling Outage Plan (this plan) NW20.40.05 Disconnection of Demand as Required by Authority Rules OR00.00.07 Major Outage Communication Plan Issue Date 11.12.2014 NW20.40.09 Amendment No.05 Page 5 of 37 Orion NZ Ltd. Contingency Plan Security of Supply Participant Rolling Outage Plan Regulations Electricity Governance (Security of Supply) Regulations 2008 and Electricity Governance (Security of Supply) Amendment Regulations 2009 Rolling Outages Planned electricity disconnections spread over different parts of the network at differing times to avoid prolonged outages at any one location. Security Coordinator the person responsible for system security at the System Operator SOROP System Operator Rolling Outage Plan Supply Shortage Declaration made by the System Operator under Declaration part 9 of the Code. System Operator Operator of the national electricity transmission grid 4. BACKGROUND 4.1 ELECTRICITY AUTHORITY The Authority is an independent Crown entity responsible for the efficient operation of the New Zealand electricity market. Core functions of the Authority are to: • make and administer the Electricity Industry Participation Code 2010 (Code) governing the New Zealand electricity market; • monitor and enforce compliance with the Code, various regulations, and the Act; 4.2 TRANSPOWER Transpower is a State Owned Enterprise, tasked with owning and operating New Zealand’s National Grid - the network of high voltage transmission lines and substations that connect areas of generation with town and cities across the country. As System Operator, Transpower manages the real-time operation of New Zealand's electricity transmission system. It keeps the right amount of energy flowing to match generated supply with demand. 4.3 ORION Orion is the electricity network company that owns and maintains the electricity lines and cables that deliver power to the Christchurch and Central Canterbury region between the Waimakariri and Rakaia rivers. 5. RANGE OF EVENTS Events that could lead the System Operator to make a Supply Shortage Declaration can in general terms be categorized as; • Developing (Category A) Event – Events that evolve over time, for example low hydro lake or fuel levels. • Immediate (Category B) Events – Events that occur with little or no warning, usually as a result of a transmission line or major generation failure. Issue Date 11.12.2014 NW20.40.09 Amendment No.05 Page 6 of 37 Orion NZ Ltd. Contingency Plan Security of Supply Participant Rolling Outage Plan 5.1 MAJOR INCIDENT A Category A or Category B event will be classed by Orion as a major incident and Orion’s management team will activate the appropriate contingency plan and will manage the incident accordingly. Communication with retailers, civil defence, and other stakeholders will be as per notification procedures described in our Major Outage Communication Plan OR00.00.07 6. ORION STAFF RESPONSIBILITIES ROLE ORION PERSONNEL Receive communication from System Operator CEO, Commercial Manager or Control Centre Implement this plan Operations Manager Preparation of load shedding schedules Control Centre Manager Customer notification Release Planning Manager Weekly savings reporting Commercial Analyst Revoking rolling outages Commercial Manager Reporting to System Operator Commercial Manager Reporting to media, public agencies Communications and Engagement Manager Reporting to CDEM and Lifelines Operations Manager 7. COMMUNICATION WITH THE SYSTEM OPERATOR The System Operator can contact Orion using the following details: Orion New Zealand Ltd FAX +64 3 363 9899 PH +64 3 363 9898 P.O. Box 13896, Christchurch 8141 565 Wairakei Rd, Christchurch 8141 Orion will contact the System Operator for administration purposes (including reporting performance against targets) using the following details: Transpower System RCS Operator FAX: 04 498 2671 FAX: 03 349 8506 PH: 04 495 7000 PH: 03 349 7043 PO Box 1021 TSX: 37 7905 96 The Terrace Islington WELLINGTON Christchurch Issue Date 11.12.2014 NW20.40.09 Amendment No.05 Page 7 of 37 Orion NZ Ltd.