Transend - Appendix 5 Renewal capital expenditure - Australian ...

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CONTENTS 0BInvestment Evaluation Summary TNM-GS-809-0720 CONTENTS........................................................................................................................................................................ 2 1 BACKGROUND....................................................................................................................................................... 3 2 PROJECT TIMING................................................................................................................................................. 4 3 PROJECT OVERVIEW.......................................................................................................................................... 3 4 INVESTMENT NEED ............................................................................................................................................. 5 4.1 CIRCUIT BREAKERS ............................................................................................................................................ 5 4.2 CURRENT TRANSFORMERS ................................................................................................................................. 6 4.3 VOLTAGE TRANSFORMERS................................................................................................................................. 7 4.4 PROTECTION AND CONTROL............................................................................................................................... 7 5 CUSTOMER CONSULTATION............................................................................................................................ 8 6 BENEFITS ................................................................................................................................................................ 8 7 OPTIONS ANALYSIS ............................................................................................................................................. 8 7.1 OPTION 1 - MAINTAIN EXISTING ASSETS AND DEFER REPLACEMENT.................................................................. 8 7.2 OPTION 2 - REPLACE SELECTED ASSETS IN-SITU ................................................................................................. 9 7.3 OPTION 3 - STAGED REPLACEMENT OF SELECTED ASSETS IN-SITU................................................................... 10 7.4 OPTION 4 - REPLACE SELECTED ASSETS IN NEW SWITCH BAYS ........................................................................ 10 7.5 OPTION 5 - COMPLETE REDEVELOPMENT OF BURNIE SUBSTATION 110 KV ..................................................... 11 8 OPTION ESTIMATES .......................................................................................................................................... 12 9 PREFERRED OPTION ......................................................................................................................................... 12 © <strong>Transend</strong> Networks Pty Ltd 2 of 12
1 BACKGROUND 0BInvestment Evaluation Summary TNM-GS-809-0720 Burnie Substation is critical to ensuring a secure and reliable electricity supply to customers in north-west Tasmania. Burnie Substation 110 kV provides: � an interconnection to Burnie Substation 220 kV via two 90 MVA auto-transformers (these transformers are currently being replaced with a single transformer under a separate project); � transmission lines to Emu Bay, Hampshire (radial), Port Latta, Sheffield and Smithton substations; and � two 110/22 kV transformers that supply connections to Aurora Energy. Figure 1 presents the schematic diagram of the north-west Tasmanian transmission network that connects to Burnie Substation. Figure 1 – North-west area transmission network schematic diagram The majority of the 110 kV assets in service at Burnie Substation were installed when the substation was commissioned in 1952. 2 PROJECT OVERVIEW The planned redevelopment of Burnie Substation 110 kV primarily includes the replacement of 110 kV circuit breakers, current transformers, and protection and control equipment and the installation of voltage transformers. The substation redevelopment will improve the security and reliability of electricity supply by replacing assets that are in poor condition and susceptible to failure. © <strong>Transend</strong> Networks Pty Ltd 3 of 12
Page 1: APPENDIX 5 Transend, Renewal capita
Page 4 and 5: Renewal Capital Expenditure TNM-GR-
Page 14 and 15: Figure 4 - Overview of the Reyrolle
Page 16 and 17: Table 3 - Circuit criticality ratin
Page 18 and 19: Figure 6 - Capacitive voltage trans
Page 20 and 21: Current transformer make / type Mod
Page 22 and 23: 1.6.5 Protection and control Renewa
Page 32 and 33: CONTENTS 0BInvestment Evaluation Su
Page 34 and 35: 0BInvestment Evaluation Summary TNM
Page 38 and 39: 5 CUSTOMER CONSULTATION 0BInvestmen
Page 40 and 41: � implementation of revised maint
Page 42 and 43: Table 1 - Summary of economic analy
Page 52 and 53: 7.3 OPTION 3 - STAGED REPLACEMENT O
Page 62 and 63: 4.8 BUS CONDUCTOR AND FITTINGS 0BIn
Page 64 and 65: 6 BENEFITS The direct benefits of r
Page 66 and 67: 7.2.3 DRAWBACKS The option has the
Page 68 and 69: Figure 2 - Option 3: single line di
Page 70 and 71: This option includes: � installin
Page 73 and 74: INVESTMENT EVALUATION SUMMARY 0BInv
Page 75 and 76: 1 BACKGROUND 0BInvestment Evaluatio
Page 77 and 78: 4.1 CIRCUIT BREAKERS 0BInvestment E
Page 81 and 82: � reduced burden on spare parts m
Page 85: 0BInvestment Evaluation Summary TNM
Page 90 and 91: � replacement of the 110 kV Meado
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0BInvestment Evaluation Summary TNM
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� reduced burden on spare parts m
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CONTENTS 0BInvestment Evaluation Su
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4.2 VOLTAGE TRANSFORMERS The 110 kV
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4.3 CURRENT TRANSFORMERS 0BInvestme
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The drawbacks for this option are t
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INVESTMENT EVALUATION SUMMARY 0BInv
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1 BACKGROUND 0BInvestment Evaluatio
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4.1.2 TUNGATINAH SUBSTATION 0BInves
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4.3.2 TUNGATINAH SUBSTATION The 110
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Tarraleah-New Norfolk No. 1 110 kV
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� the possibility of a 220 kV con
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Table 2 - Summary of Transend’s c
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3.2.2 110 KV BUS BAR PROTECTION SCH
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5. CUSTOMER CONSULTATION 0BInvestme
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Table 3 - Summary of NPV cost analy
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� loss of back-up protection func
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INVESTMENT EVALUATION SUMMARY TITLE
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INVESTMENT EVALUATION SUMMARY TITLE
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Burnie-Waratah 110 kV Transmission
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CONTENTS Burnie-Waratah 110 kV Tran
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1 BACKGROUND Burnie-Waratah 110 kV
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2.3 MAINTENANCE Burnie-Waratah 110
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Burnie-Waratah 110 kV Transmission
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