PRIMARY functional requirements for heywood terminal station (HYTS) interface
PREPARED BY: Connection Services
VERSION: 3.0
RELEASE DATE: 4 October 2013
PRIMARY FUNCTIONAL REQUIREMENTS
Version Release History
Version / Date / By / Reviewed by / Approved By / Changes1.0 / 01-05-2013 / F. Ma / E. Twining / A. Dinning / First Issue
2.0 / 15-07-2013 / E. Twining / M. Redpath / A. Dinning / Modified for inclusion in Augmentation ITT
3.0 / 03-10-2013 / E. Twining / A. Dinning / A. Dinning / Modifications to Section 2.5.2.
This document has been created by Connection Services, Network Development.
Contents
1 Project Description 4
1.1 Introduction 4
1.2 Summary of Required Works 4
1.3 Related Documents 4
1.4 Supporting Projects 5
1.5 Asset Lifespan 5
1.6 System Conditions 5
1.7 Planning and Operational Advice 6
2 Shared Network Interface Requirements 6
2.1 General 6
2.2 Network Services 6
2.3 Power Transfer and Switching Capability 7
2.4 Interfaces 7
2.5 Primary Plant 8
2.5.1 Equipment Ratings 8
2.5.2 Service Environmental Conditions 10
2.5.3 Interplant Connections 10
2.6 Earthing 10
2.7 Electric and Magnetic Field Levels 10
2.8 Station Auxiliary Supplies 11
2.9 Station Layout 11
2.9.1 Site Layout 11
2.9.2 Control Buildings 11
2.9.3 Protection from Damage 11
2.9.4 Future Considerations 11
2.9.5 Other Facility Requirements 12
2.10 Standards and Codes 12
Appendix A: Environmental Conditions 14
1 Project Description
1.1 Introduction
This document specifies AEMO’s functional requirements for the Interface, which will facilitate the connection of the Augmentation to the Victorian Shared Network.
1.2 Summary of Required Works
The following works are required to connect the M3 transformer at HYTS:
· Install a 275 kV bus extension, rack and associated bay hardware in Bay 4;
· Install a 275 kV circuit breaker and associated isolators in Bay 4 to switch the existing No1 275 kV capacitor bank;
· Install a 275 kV isolator between the 275 kV Bus and the 275 kV circuit breaker for the No 1 SESS 275 kV line (Bay 6);
· Install a 275 kV isolator between the 275 kV Bus and the 275 kV circuit breaker for the No 2 SESS 275 kV line (Bay 5);
· Install a 500 kV isolator between No 1 500 kV bus and No 1 500/275/22 kV transformer (Bay 6);
· Install a 500 kV isolator between No 2 500 kV bus and No 2 500/275/22 kV transformer (Bay 5);
· Connect 275 kV bus extension in Bay 4 to existing 275 kV bus in Bay 5;
· Provide terminals for connection of TNSP owned No 1 500 kV bus in Bay 5 to existing No 1 500 kV bus in Bay 6 (TNSP to connect);
· Provide terminals for connection of TNSP owned No 2 500 kV bus in Bay 4 to existing No 2 500 kV bus in Bay 5 (TNSP to connect);
· Provide terminals for connection of TNSP owned 275 kV bus in Bay 3 to 275 kV bus extension in Bay 4 (TNSP to connect);
1.3 Related Documents
These functional requirements should be read in conjunction with the documents listed in Table 1 and
Table 2.
Table 1: Project Requirements
Document Number / Document NamePCR/HYTS/17 / Protection and Control Requirements for Heywood Terminal Station Interface
PCR/HYTS/18 / Protection and Control Requirements for Heywood Terminal Station Augmentation
Primary Functional Requirements for Heywood Terminal Station Augmentation
Table 2: Other Relevant Documents
Author / Document NameNational Health and Medical Research Council
(NHMRC) / Australian Exposure Interim Guidelines
http://www.arpansa.gov.au/pubs/rhs/rhs30.pdf
Australian Radiation Protection and Nuclear Safety Agency (ARPANSA) / Australian Exposure Guidelines, available at: http://www.arpansa.gov.au/radiationprotection/FactSheets/is_emf.cfm
AEMO / Cost Allocation Methodology – Prescribed Services, available at:
http://www.aemo.com.au/Electricity/Network-Connections/Victorian-Tranmission-Services/Victorian-Connection-Initiatives
AEMO / Victorian Electricity Transmission Planning Advice
1.4 Supporting Projects
Implementation of this Project relies on the completion of the Augmentation.
1.5 Asset Lifespan
The primary assets and equipment included in this project shall be designed and constructed to have a life of at least 45 years from the date of the Project’s practical completion.
1.6 System Conditions
Table 3 and
Table 4 list the system conditions under which the primary plant and equipment o be installed as part of the Shared Network Interface must operate satisfactorily. Further information regarding required system conditions for the various Victorian transmission voltages is provided in Appendix A.
Table 3: System Conditions at 500 kV station
System Condition / RequirementMaximum continuous operating voltage, Um / 550 kVRMS
System frequency / 50 Hz
Number of Phases / 3
Method of earthing system neutral / Direct
Maximum fault levels (three phase symmetrical, sub-transient) / 50 kARMS
X/R ratio / 35
Lightning impulse withstand level (phase – earth) / 1550 kVPEAK
Switching impulse withstand level (phase – earth) / 1175 kVPEAK
Short duration power frequency withstand voltage for 1 minute (phase – earth) / 620 kVRMS
Table 4: System Conditions at 275 kV station
System Condition / RequirementMaximum continuous operating voltage, Um / 362 kVRMS
System frequency / 50 Hz
Number of Phases / 3
Method of earthing system neutral / Direct
Maximum fault levels (three phase symmetrica, sub-transient) / 40 kARMS
X/R ratio / 30
Lightning impulse withstand level (phase – earth) / 1300 kVPEAK
Switching impulse withstand level (phase – earth) / 950 kVPEAK
Short duration power frequency withstand voltage for 1 minute (phase – earth) / 520 kVRMS
1.7 Planning and Operational Advice
AEMO will provide a planning advice document for the project, describing the requirement for, and operation of, the primary works based on asset configurations and capabilities. It is intended to facilitate communication between network planners, service providers and network operators and form the basis for development of operational advice.
The planning advice document will include switchyard and connecting line/plant configuration, plant ratings, impedances and other relevant operational parameters, as well as any system constraints that may arise as a result of the new augmentation.
The process for preparation of the planning advice document, including data requirements from both SPI PowerNet and TNSP, is described in the document “Victorian Electricity Transmission Planning Advice”.
2 Shared Network Interface Requirements
2.1 General
All primary plant and equipment forming part of the Shared Network Interface must be installed and commissioned to accommodate the proposed connection arrangement depicted in Figure 1.
All primary plant and equipment must conform with all relevant Australian Standards. In the absence of an Australian Standard, the relevant International Electro-technical Committee (IEC) standards shall apply. A listing of standards and guides is included in Table 11.
All installed primary plant and equipment must allow for maintenance and repair of failed components while minimising the impact on power system performance as follows:
· Outage of equipment within a bay (excluding bus side isolators and earth switches) for maintenance, repair or extension purposes must not require any connecting busbar or equipment within an adjacent bay to be taken out of service;
· Outage of bus side isolators or earth switches must not require outage of equipment beyond the adjacent busbar and bay;
· Outage of equipment must not compromise the protection and control of in service plant.
Secondary equipment and wiring must not permanently limit the primary plant ratings.
2.2 Network Services
This section identifies the network services that SPI PowerNet is required to provide.
Table 5: Network Services
Services / Works Required for Service DeliveryShared network services associated with the new primary plant and equipment. / Provide and maintain the power transfer capability outlined in Table 6.
Provide and maintain the fault withstand and switching capabilities outlined in Table 6.
Provide and maintain the configuration switching capability outlined in Attachment D.1.
Provide and maintain protection, communications, monitoring and control services as outlined in the secondary works PCR documentation listed in Table 1.
2.3 Power Transfer and Switching Capability
Attachment D.1 shows the required connection and switching arrangement for the HYTS.
Table 6 specifies the required node-to-node network service performance for the new connection, based on the node definitions in Attachment D.1.
Table 6: Network Service Performance Requirements
Node / Fault Withstand Capability / Continuous Thermal Rating(Summer Ambient Temperature1)
kARMS symmetrical / X/R Ratio / Amps
H - I / 50 / 35 / 4000
J - K / 50 / 35 / 4000
Q - R / 40 / 30 / 3150
S - T / 40 / 30 / 3150
L – M - N / 40 / 30 / 4500
M - U / 40 / 30 / 3150
Note 1: See Section 2.5.2 for further details of the Continuous Thermal Rating Requirements.
2.4 Interfaces
The Shared Network Interface will involve connection of the 500 kV bus extensions to the existing 500 kV buses, and connection of the 275 kV bus extension in Bay 4 to the existing 275 kV bus and the TNSP owned 275kV bus extension in Bay 3 as shown in Error! Reference source not found. (Points A, F, L and N).
SPI PowerNet is required to provide terminals on the existing 500 kV buses to facilitate connection of TNSP owned 500 kV bus extensions. The ratings for the 500 kV bus extensions, must at least match the existing 500 kV bus ratings.
SPI PowerNet is required to provide connection of the 275 kV bus extension in Bay 4 to the existing 275 kV bus in Bay 5. SPI PowerNet must also provide terminals on the 275 kV bus extension in Bay 4 to facilitate connection of the TNSP owned 275 kV bus extension in Bay 3. The rating of the 275 kV bus, including those forming part of the Augmentation, must at least match the existing 275 kV bus rating.
The design of the Augmentation will need to be co-ordinated with the Interface.
2.5 Primary Plant
2.5.1 Equipment Ratings
All new primary plant and equipment shall be rated for operation at all times under the power system conditions listed in Table 3 and
Table 4, to provide the required performance specified in
Table 6 and ratings listed in Table 7 to Table 10.
Table 7: New Primary Plant Ratings Requirements (Isolators) for 500 kV Station
Parameter / Units / EquipmentIsolator 1 / Earth Switch 1,2
Maximum continuous operating voltage / kV / 550 / 550
Lightning impulse withstand level (LIWL) / kVPEAK / 1550 / 1550
Switching impulse withstand level (SIWL) / kVPEAK / 1175 / 1175
Continuous thermal rating
(At 40ºC ambient) / A / 4000 / N/A
Symmetric Fault withstand capability
(1 second duration) / kARMS / 50 / 50
Fault make capability / kAPEAK / N/A / N/A
X/R Ratio / - / 35 / 35
Note 1: Isolators shall be motorised as necessary to enable remote operation.
Note 2: Earth switches shall be capable of withstanding electromagnetic and electrostatic induced currents and voltages under all operating and system conditions.
Table 8: New Primary Plant Rating Requirements (Instrumentation) for 500 kV station
Parameter / Units / Equipment
Current Transformer 1 / Voltage Transformer
Maximum continuous operating voltage / kV / 550 / 550
Lightning impulse withstand level (LIWL) / kVPEAK / 1550 / 1550
Switching impulse withstand level (SIWL) / kVPEAK / 1175 / 1175
Continuous thermal rating
(At 40ºC ambient) / A / 4000 / N/A
Symmetric Fault withstand capability
(1 second duration) / kARMS / 50 / N/A
Rated X/R ratio / - / 35 / N/A
Accuracy / - / Metering cores: ±0.2%
Protection cores: saturation characteristics shall be suitable for requirements of protection scheme. / Metering: ±0.2%
Protection: ±1.0%
Class / - / Protection / Metering / Protection / Metering
Note 1: Where required to interface with existing current transformers, new equipment performance must be the equivalent of the existing equipment.
Table 9: New Primary Plant Ratings Requirements (Switchgear) for 275 kV Station
Parameter / Units / Equipment
Circuit Breaker1,2,5 / Isolator 3 / Earth Switch 3,4
Maximum continuous operating voltage / kV / 362 / 362 / 362
Lightning impulse withstand level (LIWL) / kVPEAK / 1300 / 1300 / 1300
Switching impulse withstand level (SIWL) / kVPEAK / 950 / 950 / 950
Continuous thermal rating
(At 40ºC ambient) / A / 3150 / 3150 / N/A
Symmetric Fault withstand capability
(1 second duration) / kARMS / 40 / 40 / 40
Fault interrupt capability / kARMS / 40 / N/A / N/A
Fault make capability / kAPEAK / 105 / N/A / N/A
X/R Ratio / - / 30 / 30 / 30
Note 1: Circuit breakers must be capable of withstanding the Transient Recovery Voltages (TRVs) that may be experienced on switching, or alternatively install additional primary plant to limit the TRV rate of rise to an acceptable level.
Note 2: To be specified where required for specific projects. Circuit breaker making and breaking duty, including TRV withstand, also needs to accommodate any possible requirement for the future connection of underground cable circuits (i.e. to account for specific capacitive charging currents).
Note 3: Isolators shall be motorised as necessary to enable remote operation.
Note 4: Earth switches shall be capable of withstanding electromagnetic and electrostatic induced currents and voltages under all operating and system conditions
Note 5: Point-on-wave switching, fault clearing times and auto-reclose facilities are to be as specified in the PCR.
Table 10: New Primary Plant Rating Requirements (Instrumentation) for 275 kV station
Parameter / Units / EquipmentCurrent Transformer 1 / Voltage Transformer
Maximum continuous operating voltage / kV / 362 / 362
Lightning impulse withstand level (LIWL) / kVPEAK / 1300 / 1300
Switching impulse withstand level (SIWL) / kVPEAK / 950 / 950
Continuous thermal rating
(At 40ºC ambient) / A / 3150 / N/A
Symmetric Fault withstand capability
(1 second duration) / kARMS / 40 / N/A
Rated X/R ratio / - / 30 / N/A
Accuracy / - / Metering cores: ±0.2%
Protection cores: saturation characteristics shall be suitable for requirements of protection scheme. / Metering: ±0.2%
Protection: ±1.0%
Class / - / Protection / Protection
Note 1: Where required to interface with existing current transformers, new equipment performance must be the equivalent of the existing equipment.
2.5.2 Service Environmental Conditions
All primary plant and equipment must: