This design is based on the power towing power supply design standard and the high-speed rail design standard, and the main wiring of the Chenjia Bay towing substation of the Lanzhou-Ulmqi high-speed railway is designed. The West North region uses a unique 330 kV voltage grade as the mainframe of the electric network, so the input voltage of the substation is 330 kV, and the traction power supply system adopts AT power supply. Determine the main wiring format of the substation. Using the load calculation (requiring the solution of the coefficient method), to determine the capacity of the transformer, the number and wiring method. We examine the selection principles and standards of high pressure equipment and combine short-circuit calculations. Short-circuit current selects the appropriate model number for high-pressure equipment such as a base line and circuit breaker, separation switch, and mutual inductor, and performs stability inspection. Completed the design of lightning-proof grounding and relay protection equipment for towing substations, and draw an electric main wiring diagram and a substation lightning-proof plan.
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