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 OVERVIEW.......................................................................................................................................... 3 3 PROJECT TIMING ................................................................................................................................................. 4 4 INVESTMENT NEED ............................................................................................................................................. 4 4.1 CIRCUIT BREAKERS............................................................................................................................................ 5 4.2 VOLTAGE TRANSFORMERS................................................................................................................................. 5 4.3 CURRENT TRANSFORMERS ................................................................................................................................. 6 4.4 DISCONNECTORS................................................................................................................................................ 6 4.5 POST INSULATORS.............................................................................................................................................. 6 4.6 110 KV BUS BAR PROTECTION............................................................................................................................ 6 4.7 TRANSMISSION LINE PROTECTION AND CONTROL SYSTEMS ............................................................................... 7 4.8 HV PROTECTION AND CONTROL SYSTEMS ......................................................................................................... 7 4.9 HV SCADA SYSTEM ......................................................................................................................................... 8 5 CUSTOMER CONSULTATION............................................................................................................................ 8 6 BENEFITS ................................................................................................................................................................ 8 7 OPTIONS ANALYSIS ............................................................................................................................................. 9 7.1 OPTION 1: MANAGE EXISTING ASSETS AND DEFER REPLACEMENT..................................................................... 9 7.2 OPTION 2: REPLACE SELECTED ASSETS IN-SITU ............................................................................................... 10 7.3 OPTION 3: STAGED REPLACEMENT OF SELECTED ASSETS IN-SITU .................................................................... 11 7.4 OPTION 4: COMPLETE REDEVELOPMENT OF KNIGHTS ROAD SUBSTATION 110 KV.......................................... 12 8 OPTION ESTIMATES .......................................................................................................................................... 12 9 PREFERRED OPTION ......................................................................................................................................... 13 © <strong>Transend</strong> Networks Pty Ltd 2 of 13
1 BACKGROUND 0BInvestment Evaluation Summary TNM-GS-809-0720 Knights Road Substation is connected to the transmission network via the Chapel Street–Knights Road–Electrona and Knights Road–Electrona 110 kV transmission lines. Knights Road Substation supplies Kermandie and Huon River Substations at 110 kV and Aurora Energy at 11 kV. The combined load at Huon River, Kermandie and Knights Road substations exceeded 25 MW in winter 2008. The majority of the 110 kV assets in service at Knights Road Substation were installed when the substation was commissioned in 1962. A new 110/11 kV connection site was established at Knights Road Substation in 1987. Figure 1 presents the schematic diagram of the Huon area transmission network that connects to Knights Road Substation. Figure 1 – Huon area transmission network schematic diagram 2 PROJECT OVERVIEW The works at Knights Road Substation include the replacement of selected 110 kV switch bays and protection and control systems associated with the 110 kV and 11 kV systems. In particular, this project includes the following works: � replacement of Reyrolle type 110/OS/10 110 kV circuit breakers; � replacement of Asea type EMFA 120 110 kV voltage transformers; � installation of 110 kV voltage transformers on each transmission line; � replacement of girder-mounted disconnectors with pedestal mounted units; � replacement of multi-piece post insulators; � replacement of the protection scheme on the Knights Road–Huon River–Kermandie 110 kV transmission line; � replacement of the 110 kV bus bar protection scheme; � replacement of the protection scheme associated with the 110 kV bus coupler circuit breaker; � replacement of the protection schemes associated with transformers T1 and T2; � replacement of the protection schemes associated with feeder bays and 11 kV bus bars; and � replacement of the substation supervisory control and data acquisition (SCADA). © <strong>Transend</strong> Networks Pty Ltd 3 of 13
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APPENDIX 5 Transend, Renewal capita
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Renewal Capital Expenditure TNM-GR-
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Figure 4 - Overview of the Reyrolle
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Table 3 - Circuit criticality ratin
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Figure 6 - Capacitive voltage trans
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Current transformer make / type Mod
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1.6.5 Protection and control Renewa
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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: INVESTMENT EVALUATION SUMMARY 0BInv
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
Page 96 and 97: � reduced burden on spare parts m
Page 104 and 105: 4.2 VOLTAGE TRANSFORMERS The 110 kV
Page 106 and 107: 4.3 CURRENT TRANSFORMERS 0BInvestme
Page 110 and 111: The drawbacks for this option are t
Page 113 and 114: INVESTMENT EVALUATION SUMMARY 0BInv
Page 115 and 116: 1 BACKGROUND 0BInvestment Evaluatio
Page 119 and 120: 4.1.2 TUNGATINAH SUBSTATION 0BInves
Page 121 and 122: 4.3.2 TUNGATINAH SUBSTATION The 110
Page 123 and 124: 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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CONTENTS 0BInvestment Evaluation Su
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0BInvestment Evaluation Summary TNM
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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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CONTENTS 0BInvestment Evaluation Su
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� loss of back-up protection func
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INVESTMENT EVALUATION SUMMARY TITLE
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1 BACKGROUND 0BInvestment Evaluatio
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INVESTMENT EVALUATION SUMMARY TITLE
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1 BACKGROUND 0BInvestment Evaluatio
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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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