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PROTECTION AND CONTROL REQUIREMENTS FOR HEYWOOD TERMINAL STATION (HYTS) AUGMENTATION PREPARED BY: Connection Services VERSION: 2.0 RELEASE DATE: 4 October 2013 Document: PCR / HYTS /18 Issued WITHOUT Settings PROTECTION AND CONTROL REQUIREMENTS Version Release History Version Date Prepared by Reviewed by Approved By 1.0 15 July 2013 F. Ma E. Twining / M. Redpath A. Dinning 2.0 12 September 2013 E. Twining M. Redpath A. Dinning Changes Updated to incorporate tender clarifications This document has been created by Connection Services, Network Development. Version 2.0 PCR/HYTS7/18 3 October 2013 Page 2 of 16 PROTECTION AND CONTROL REQUIREMENTS Contents 1 Glossary ........................................................................................................... 4 2 General Information ......................................................................................... 4 3 Interface Boundaries ........................................................................................ 5 4 Protection Requirements .................................................................................. 7 5 Control and Monitoring Requirements .............................................................. 8 6 Remote Monitoring and Control from TOC and AEMO ...................................10 7 Miscellaneous Requirements ..........................................................................10 Version 2.0 PCR/HYTS7/18 3 October 2013 Page 3 of 16 PROTECTION AND CONTROL REQUIREMENTS 1 Glossary In this document, capitalised words or phrases or acronyms not defined in the PCCD, have the meaning set out opposite those words, phrases, or acronyms in Table 1 below. Table 1: Glossary of terms Term Meaning APD Portland Aluminium DNSP Distribution Network Service Provider EAPTS Emergency APD Potline Tripping Scheme MOPS Mortlake Power Station ROI Remotely Operated Isolators TRTS Tarrone Terminal Station X/R ratio Ratio of reactance to resistance 2 General Information 2.1 Introduction This document specifies the protection, control and monitoring requirements for the Augmentation. 2.2 Related Documents This document should be read in conjunction with the documents listed in Table 2. Table 2: Related Documents Document Number Document Name PCR/HYTS/17 Protection and Control Requirements for Heywood Terminal Station (HYTS) Interface Primary Functional Requirements for Heywood Terminal Station (HYTS) Interface Primary Functional Requirements for Heywood Terminal Station (HYTS) Augmentation 2.3 Interdependencies Implementation of the Project requires the completion of the Augmentation and Interface in accordance with the PFRs and PCRs for each. The PCRs and PFRs referred to in the documents listed in Table 2 are required in addition to the works described in this document. 2.4 Plant operating conditions Expected power system conditions have been included to allow the design of the secondary equipment and for the preparation of secondary settings. These conditions are outlined in Appendix B. The fault levels and X/R ratios shown in Table A-1 apply to plant when the Augmentation is complete. The plant loading levels shown in Table A-2 apply when the Augmentation is complete and represent peak loading under worst case prior outage and single contingency conditions. Version 2.0 PCR/HYTS7/18 3 October 2013 Page 4 of 16 PROTECTION AND CONTROL REQUIREMENTS TNSP must ensure that protection and control systems and settings are implemented such that they will not operate for plant loading levels up to at least those shown in Table A-2. TNSP must ensure that protection and control systems and settings are implemented such that they will not operate for voltage conditions that the plant must ride through. These voltage conditions are set out in Table A-3. 2.5 General requirements 2.5.1 Provision of Data AEMO will advise the TNSP generally three months prior to service of the following information: Parameters for the synchronism-check interlock facilities; and Parameters for all voltage controls and interlocks. 2.5.2 Security Requirements If the following facilities are provided as part of the project in accordance with this PCR, they must be duplicated and/or be provided with an adequate measure of physical and electrical segregation. The design must avoid common points of failure between the duplicated facilities: Batteries used for protection, control and communications purposes; Battery chargers; Auxiliary supplies; Protection panels; Circuit breaker trip coils; Control cables containing X and Y protection quantities, including: o Trip circuits to CBs; o CT and VT secondaries; o Communication systems; and o Transformer quantities used for protection purposes. Wherever available, independent physical routes must be used for control cables. Otherwise, control cables must be secured to opposite sides of the route for the length of the common physical route. 3 Interface Boundaries Protection, monitoring and control signals must be exchanged at the Interface. The physical location of the Interface will be specified in the connection agreement between SPI PowerNet and the TNSP. This document specifies the functional obligations on either side of the Interface. 3.1 Primary Interfaces The primary interfaces are outlined in the document titled: “Primary Functional Requirements for Heywood Terminal Station Interface”. Version 2.0 PCR/HYTS7/18 3 October 2013 Page 5 of 16 PROTECTION AND CONTROL REQUIREMENTS 3.2 Secondary Interfaces This document specifies the minimum requirements for the exchange of secondary signals and quantities through the Interface. 3.3 Secondary signals and quantities at interfaces Secondary signals and quantities exchanged through the Interfaces include: Table 3: Secondary Signals and Quantities Class of signal or quantity Protection Plant monitoring and controls Monitoring and controls for remote system operation System monitoring (HSM, QoSM) Special control schemes (emergency control schemes) Auxiliary supplies Type of signal or quantity trips interaction such as fibre optic communication links between Protection devices Protection device inputs such as binary, current and voltage controls, status indications, alarms and instrumentation controls, status indications, alarms and instrumentation inputs such as current and voltage files for transmission remotely controls, status indications, alarms and instrumentation required locally for correct operation inputs received from remote locations outputs transmitted remotely 240V and 415 V ac supplies Protection, control and communications dc supplies 3.4 Obligations at Interface Points TNSP and SPI PowerNet must exchange signals at the Interface to achieve the functional requirements specified in PCR/HYTS/17 and PCR/HYTS/18. More particularly: TNSP must: Provide secondary signals and quantities, identified in PCR/HYTS/18 for the Augmentation at the Interface for use by SPI PowerNet; Utilise secondary signals and quantities, identified in PCR/HYTS/18 for the Augmentation provided by SPI PowerNet at the Interface. SPI PowerNet must: Provide the secondary signals and quantities, identified in PCR/HYTS/17 for TNSP at the Interface; Utilise secondary signals and quantities, identified in PCR/HYTS/17 provided by TNSP at the Interface. Transmit signals and quantities, received from the TNSP at the Interface, to appropriate sites; and Transmit signals and quantities to the TNSP at the Interface. Version 2.0 PCR/HYTS7/18 3 October 2013 Page 6 of 16 PROTECTION AND CONTROL REQUIREMENTS 4 Protection Requirements 4.1 General requirements TNSP must coordinate with SPI PowerNet to ensure the design of the protection systems on the Augmentation seamlessly integrate with SPI PowerNet’s protection systems at HYTS. TNSP must ensure that its protection systems comply with the requirements detailed in Table 4. Table 4: General Protection Requirements Requirement Each protection system in a duplicated protection scheme (designated “X” and “Y” throughout this document) must be of different manufacturer or have differing operating principles. If this is not possible then permission from AEMO must be obtained to implement the proposed arrangement. All circuit breaker backup and dead zone trips must be independently initiated by X and Y primary protection. Protection times specified apply to both X and Y protection schemes. All fault clearance times, including backup/dead zone protection, include circuit breaker operating times, including (where applicable) those at remote locations. Saturation characteristics of current transformers used for protection purposes must be suitable to meet the operating requirements of the protection with margins in accordance with good electricity industry practice. Where new plant is added to the terminal station, that plant must be integrated into all existing protection systems as required. The fault clearance times referenced throught this PCR are detailed in Appendix C. 4.2 Augmentation Protection 4.2.1 Primary Protection Systems TNSP must ensure that duplicated primary protection schemes are established or modified to detect and clear all faults within the Augmentation. If a fault occurs within the Augmentation, TNSP must ensure that: all assets under its control required to operate to clear the fault do operate to clear the fault; the fault is cleared within the time listed in Row 1 of Table B-1 for a 500 kV fault measured from fault inception; if the fault clearance requires operation of SPI PowerNet’s 275 kV shared network circuit breakers, protection trip signalling is provided to SPI PowerNet at the Interface within the time listed in Row 1 of Table B-2 measured from fault inception. Where trip signals are provided by SPI PowerNet at the Interface and operation of the Augmentation is necessary to clear a fault (while isolating the minimum amount of plant necessary to clear the fault), TNSP must ensure that the Augmentation operates within the fault clearance time listed in Row 2 of Table B-1, measured from the time the protection signalling is provided. 4.2.2 Backup Protection Systems For all faults detected by the TNSP’s primary protection schemes, TNSP must ensure that the primary protection system that detects the fault initiates the backup/dead-zone protection system associated with the faulty plant. Version 2.0 PCR/HYTS7/18 3 October 2013 Page 7 of 16 PROTECTION AND CONTROL REQUIREMENTS If a fault occurs that requires the operation of the Augmentation and it fails to clear the fault, or the fault has occurred within a dead zone, TNSP must ensure that: all assets required to operate to clear this fault operate to clear the fault within the time listed in Row 3 of Table B-1 measured from fault inception; trip signals are provided to SPI Power Net at the Interface when a SPI PowerNet circuit breaker is required to operate to clear the fault; trip signals are provided to SPI PowerNet within the time listed in o Row 2 of Table B-2 for 500 kV assets, measured from fault inception; o Row 3 of Table B-2 for 275 kV assets, measured from fault inception. Where trip signals are provided by SPI PowerNet at the Interface and the operation of the Augmentation is necessary to clear a fault (while isolating the minimum amount of plant necessary to clear the fault), TNSP must ensure that the Augmentation operates within the fault clearance time listed in Row 4 in Appendix C measured from the time the signalling is provided. 5 Control and Monitoring Requirements 5.1 General requirements TNSP must ensure that: equipment is arranged so that failure of local automatic or remote manual controls cannot prevent operation of the local manual switching controls at HYTS; interlocking signals (for example voltage measurement or CB status indicators) of appropriate security provided at the Interface by SPI PowerNet are utilised to prevent asynchronous closure of 500 kV CBs while Victoria and South Australia are separated; all isolators are motorised; and controls are implemented for all circuit breakers and ROIs referred to in this document to meet the requirements outlined in Table 5. Table 5: General Circuit Breaker and ROI Control Requirements Facility Local and remote circuit breaker trip (open) and close controls Circuit breaker local and remote open and closed status indications Circuit breaker alarms as required by CB type and for remote operation Circuit breaker pole (phase) discrepancy (CB to trip and raise alarm on detection of discrepancy) if required by CB type (e.g., separate mechanism for each phase) All isolators are motorised (Remote Operated Isolators [ROI]) ROI open and close controls (local and remote) ROI open and close operation interlocked with CB and earth switch status ROI local and remote open and closed status indications 5.2 Control Requirements 5.2.1 Remote Control Requirements for Circuit Breakers and ROIs TNSP must provide facilities that will allow TOC to remotely open the 500 kV circuit breakers in accordance with the requirements of Version 2.0 PCR/HYTS7/18 3 October 2013 Page 8 of 16 PROTECTION AND CONTROL REQUIREMENTS Table A-4 in Appendix B. 5.2.2 Circuit Breaker Control Requirements TNSP must provide facilities in accordance with the following: General Circuit Breaker Control Requirements included in Table A-5 General ROI Control Requirements included in Table A-6; Transformer Circuit Breaker Control Requirements included in Table A-7. 5.2.3 Transformer Tap Changer Control Requirements Design of the transformer tap changer control scheme must be co-ordinated with SPI PowerNet to acheve regulation of the 275 kV bus voltage. The following modes of operation must be implemented: Automatic master (M1) – slave (M2) – slave (M3) arrangement when three transformers are operating in parallel; Automatic master (M2) – slave (M3) arrangement when M1 is out of service. Automatic / manual independent arrangement when M1 and M2 are out of service. 5.3 Voltage sources TNSP must: implement at least two voltage sources for each 500 kV Bus and the 275 kV Bus; implement automatic potential selection arrangements to provide secure voltage sources for control and monitoring systems; obtain the potential selections from appropriate and suitably switched (via CB and ROI auxiliary switches) bus and line voltage sources; provide potentials for manual synchronising that are manually selectable only; meet the performance requirements listed in Table A-8; and TNSP may negotiate with SPI PowerNet to use SPI PowerNet’s existing voltage sources at HYTS provided they meet the above conditions and the burdens are within the source ratings. Instrumentation 5.4 5.4.1 Accuracy The total overall errors of measurements must be less than: 1.0% of range for current and voltage measurements, and 2.0% for other measurements. 5.4.2 Instrumentation ranges The HYTS TNSP must provide instrumentation quantities specified in Table A-9. 5.5 Alarms TNSP must ensure that control and protection alarms are provided for the Augmentation in accordance with good electricity industry practice, including alarms related to the following: Version 2.0 PCR/HYTS7/18 3 October 2013 Page 9 of 16 PROTECTION AND CONTROL REQUIREMENTS Protection schemes; communications (including RTU alarms, if required); fire (including transformer fire alarms if applicable); double pole discrepancy; and any other plant alarms or protection and control alarms required for safe and reliable operation of the Augmentation. 6 Remote Monitoring and Control from TOC and AEMO TNSP must, in conjunction with SPI PowerNet, provide or modify local monitoring and control facilities at HYTS as appropriate for any terminal station quantities that are added or altered as a consequence of the Project, and include the required facilities for remote monitoring and control. This requirement applies to all plant and controls identified in this document. 6.1 Communications Table 6: Communication requirements Communication requirements Quantities associated with the Augmentation must be transmitted to AEMO in accordance with AEMO requirements (refer National Electricity Rules clause S5.2.6). Duplicated communications facilities are required for transmission of data between TNSP and AEMO. Duplication of dc auxiliary supplies to the communications facilities is required to prevent simultaneous loss of both communications links. (Excludes RTUs) Communications facilities (including RTUs) must meet AEMO requirements in respect of scan rates, update times, RTU turnaround times etc. 6.2 Remote Monitoring and Control Signals TNSP must make the remote monitoring and control quantities listed in Table A-9 and Table A-10 available to AEMO via a direct link communications connection. Remote control from AEMO is to be carried out through direct operator communications. TNSP must make the remote monitoring and control quantities listed in Table A-11 available to SPI PowerNet at the Interface. The HYTS TNSP is to receive the remote monitoring and control quantities listed in Table B-14 and Table A-12 at the Interface from SPI PowerNet. 7 Miscellaneous Requirements 7.1 AC Supplies Two independent AC supplies are required. Each of these AC supplies must be sufficient to provide supply to: all of the TNSP's equipment requiring AC supply (excluding lighting); meet the AC load requirement advised by SPI PowerNet for the Interface. Acceptable sources of AC supplies include the following: Transformer tertiary windings; Version 2.0 PCR/HYTS7/18 3 October 2013 Page 10 of 16 PROTECTION AND CONTROL REQUIREMENTS Feeder supplies from DNSPs. Where two feeder supplies are used, these shall preferably be from different substations or where this is not practicable, from different buses from the same substation; and Diesel generator. Portable generators are acceptable provided they can be connected and operated before expiration of battery service. If a diesel generator is included in the AC supplies, the diesel generation should be capable of operating for at least 12 hours as per the existing diesel generation at HYTS. TNSP must submit the AC Supply design to AEMO for approval. 7.2 DC Supplies 7.2.1 DC Supply Requirements TNSP must ensure that: Two independent and appropriately sized DC supplies are provided; DC supplies will be provided from batteries. Use of external dc supplies is not acceptable; The main batteries are duplicated batteries; Communication supplies are duplicated and are provided from either separate batteries or from DC – DC converters; and X and Y supplies are segregated. 7.2.2 DC Supply battery capacity If diesel generation is provided as an alternative AC source the following DC battery capacities are required: Battery for X & Y supplies: 5 hours plus 2 open and 1 close operations for each CB including 2 open and 1 close operation for each ROI Communication Batteries: 5 hours Alternatively, if diesel generation is not provided the following DC battery capacities are required: Battery for X & Y supplies: 8 hours plus 2 open and 1 close operations for each CB including 2 open and 1 close operation for each ROI Communication Batteries: 10 hours 7.3 Quality of Supply Monitoring (QoSM) 7.3.1 General Requirements The TNSP must provide the following signals at the Interface for the purposes of QoSM: 500 kV 3 phase (R, W, B) transformer currents; and 275 kV 3 phase (R, W, B) transformer currents. 7.3.2 Transducer Requirements The TNSP must ensure that: The transducers selected for current measurements represent a technically suitable source of the quantities required; Current is measured using metering class CTs (with an accuracy class of 0.2); and The response of the transducers is designed to ensure that saturation does not occur under normal conditions. Version 2.0 PCR/HYTS7/18 3 October 2013 Page 11 of 16 PROTECTION AND CONTROL REQUIREMENTS Appendix A: Tables Table A-1: Fault Levels Plant HYTS 500 kV bus HYTS 275 kV bus Maximum Fault Levels 3ph (kA) 1ph-g X/R ratio (kA) 50 50 35 40 40 30 Table A-2: Plant Loading Plant 500kV Circuit breakers 275 kV Circuit breakers 275 kV Capacitor bank circuit breaker Minimum Fault Levels 3ph (kA) 1ph-g X/R ratio (kA) TBA TBA TBA TBA TBA TBA Load (kA) TBA TBA TBA Table A-3: Voltage Conditions In addition to the requirements of Figure S5.1a.1 in the Rules (for nominal voltage), Plant will be exposed to the following voltage profiles: Voltage Level – 500 kV Buses Duration 565 kV 30 minutes Voltage Level – 275 kV Bus Duration 311 kV 30 minutes Table A-4: Requirements for Remote Control of Circuit Breakers and ROIs from TOC Plant Remote Control From TOC M3 Transformer / No 1 500 kV Bus CB Required (open only) M3 Transformer / No 2 500 kV Bus CB Required (open only) M3 Transformer 500 kV ROIs Not Required M3 Transformer 275 kV ROIs Not Required Table A-5: General Circuit Breaker Control Requirements Control Local and remote manual synchronising Remote synchronism-check interlock and interlock bypass Pre-contingent Voltage Interlock Requirement Required Required Not Required Table A-6: General ROI Control Requirements Control Local and remote Open and Close controls Interlocked appropriately with circuit breaker and earth switch operation Requirement Required Required Version 2.0 PCR/HYTS7/18 3 October 2013 Page 12 of 16 PROTECTION AND CONTROL REQUIREMENTS Table A-7: Transformer Circuit Breaker Control Requirements 500 kV CB Control Local and remote manual synchronising Remote synchronism-check interlock and interlock bypass - Voltage differential - Angle differential - Frequency differential - Undervoltage Blocking Point on Wave switching interlock and interlock bypass Three Pole Auto Reclose Voltage Interlock Live Line Lockout Single Pole Auto Reclose Requirement Required Required Setting TBA TBA TBA TBA Required Not Required Not Required Not Required Not Required Table A-8: Potential Selector Performance Requirements Requirements Performance requirement Time Drop out time on potential selection relays used for DSMs (and later Not less than 400 milliseconds HSMs) Changeover time between potentials Not greater than one second Table A-9: Instrumentation to be provided by HYTS TNSP to SPI PowerNet and AEMO Plant Quantity Required ranges M3 Transformer Voltage (3-phase) HV side 0 – 600 kV Voltage (3-phase) MV side 0 – 340 kV Current (3-phase) HV side TBA Current (3-phase) MV side TBA Active power TBA Reactive power TBA Tap position TBA Top oil temperature TBA Winding temperature TBA Frequency 45-55 Hz M3 Transformer / No 1 500 kV Bus CB Current (3-phase) 0 – TBA kA M3 Transformer / No 2 500 kV Bus CB Version 2.0 PCR/HYTS7/18 3 October 2013 Page 13 of 16 PROTECTION AND CONTROL REQUIREMENTS Table A-10: Instrumentation Quantities to be provided by SPI PowerNet to TNSP Instrumentation M1 Transformer active and reactive power M1 Transformer tap position M2 Transformer active and reactive power M2 Transformer tap position TRTS No. 1 500 kV Line active and reactive power MOPS No. 2 500 kV Line active and reactive power APD No. 1 500 kV Line active and reactive power APD No. 2 500 kV Line active and reactive power SESS No. 1 275 kV Line active and reactive power SESS No. 2 275 kV Line active and reactive power No 1 500 kV bus voltage No 2 500 kV bus voltage 275 kV bus voltage Table A-11: Remote monitoring and control quantities to be provided to AEMO Controls (via operator communications) M3 Transformer / No 1 500 kV Bus CB open / close M3 Transformer / No 1 500 kV Bus ROIs open / close M3 Transformer / No 2 500 kV Bus CB open / close M3 Transformer / No 2 500 kV Bus ROI open / close M3 Transformer 275 kV ROIs open / close Status Indications M3 Transformer / No 1 500 kV Bus CB open / closed and local / remote M3 Transformer / No 1 500 kV Bus ROIs open / closed and local / remote M3 Transformer / No 2 500 kV Bus CB open / closed and local / remote M3 Transformer / No 2 500 kV Bus ROIs open / closed and local / remote M3 Transformer 275 kV ROI open / closed Position of all Earth Switches owned by TNSP Alarms Version 2.0 Alarms relating to protection or devices relating to protection RTUs and other communications facilities dc auxiliary supplies remote tap position indication (TPI) Double pole discrepancy Fire (including transformer fire alarms where applicable) Any other plant alarms or protection and control alarms required for safe reliable operation of TNSP owned plant. PCR/HYTS7/18 3 October 2013 Page 14 of 16 PROTECTION AND CONTROL REQUIREMENTS Table A-12: Remote Monitoring and Control Quantities to be provided by TNSP to SPI PowerNet Controls (direct) M3 Transformer / No 1 500 kV Bus CB open M3 Transformer / No 2 500 kV Bus CB open Status Indications M3 Transformer / No 1 500 kV Bus CB open / closed and local / remote M3 Transformer / No 1 500 kV Bus ROIs open / closed and local / remote M3 Transformer / No 2 500 kV Bus CB open / closed and local / remote M3 Transformer / No 2 500 kV Bus ROIs open / closed and local / remote M3 Transformer 275 kV ROI open / closed Position of all Earth Switches owned by TNSP Alarms Alarms relating to protection or devices relating to protection. RTUs and other communications facilities dc auxiliary supplies remote tap position indication (TPI) Double pole discrepancy Fire (including transformer fire alarms where applicable) Any other plant alarms or protection and control alarms required for safe reliable operation of TNSP owned plant. Table A-13: Remote Monitoring and Control Quantities provided by SPI PowerNet to TNSP Controls N/A Status Indications TRTS / APD No 1 500 kV Line CB and ROI open / closed MOPS No 2 / APD No 2 500 kV Line CB and ROI open / closed M1 Transformer 500 kV ROI open / closed M2 Transformer 500 kV ROI open / closed M1 Transformer / SESS No 1 500 kV Line CB and ROI open / closed M2 Transformer / SESS No 2 500 kV Line CB and ROI open / closed SESS No 1 275 kV Line / 275 kV Bus CB and ROIs open / closed SESS No 2 275 kV Line / 275 kV Bus ROIs open / closed 275 kV Capacitor Bank CB and ROIs open / closed Position of all Earth Switches owned by SPI PowerNet Alarms Indications of malfunction or unavailability of all or any part of plant or facilities owned by SPI PowerNet RTUs and other communications facilities Version 2.0 PCR/HYTS7/18 3 October 2013 Page 15 of 16 PROTECTION AND CONTROL REQUIREMENTS Appendix B: Maximum Fault Clearance Times Table B-1: Protection Timing Requirements Row Clearance Time (milliseconds) 1 80 from the inception of fault 2 40 from provision of protection signalling 3 175 from the inception of fault 4 50 from provision of protection signalling Table B-2: Protection Signalling Timing Requirements Row Signalling Time (milliseconds) 1 30 from the inception of fault 2 125 from the inception of fault 3 200 from the inception of fault Version 2.0 PCR/HYTS7/18 3 October 2013 Page 16 of 16