Abstract 2

Chapter 1 Original substation load data 1

1. 1 raw data 1

1.2 35kV and 10kV user load statistics 2

Chapter II Main Wiring Design 3

2. 1 design principle of main electrical wiring 3

2.2 Basic requirements for main wiring design 3

2.3 Main wiring mode of the proposed substation 4

2.4 Scheme comparison 7

2.5 Selection of Main Transformer 8

Chapter 3 Calculation of Short-circuit Current 9

3. 1 Basic knowledge and purpose of short circuit calculation 9

3.2 Short-circuit current calculation 10

Chapter IV Selection and Calibration of Equipment 17

4. 1 General conditions for electrical selection 17

4.2 Press short circuit check 17.

4.3 Selection of Circuit Breaker 17

4.4 Selection of disconnector 20

4.5 Selection of Transformer 24

4.6 Bus Check 26

Chapter V Configuration of Relay Protection 30

5. 1 Basic knowledge of relay protection 30

5.2 Relay Protection Configuration of Line 30

5.3 Configuration and Setting of Transformer Relay Protection 32

5.4 Setting of standby automatic switching and automatic reclosing 35

Chapter VI Lightning Protection and Grounding Scheme Design Page 36

6. 1 lightning protection 36

6.2 Intrusion wave protection 38

6.3 Design of grounding device 38

Chapter 7 Substation Costs and Operating Expenses 39

7. 1 substation investment estimation 39

7.2 Calculation of annual operation cost of power station 39

Refer to 4 1

thank you

Annex 43

Appendix 1 Electrical Main Wiring Diagram

Appendix 2 Electrical General Layout

Appendix 3 1 10kV line interval profile

Appendix 4 1 10kv bus coupling interval section.

Appendix 5 Schematic diagram of incoming and outgoing lines of main transformer

Appendix 6 35kV Inlet and Outlet Line Profile

Appendix 7 Total Station Relay Protection Configuration Diagram

Appendix 8 Lightning Protection Verification Diagram

Village head Lu, Q3528 15657, discuss it.