【overview】Wuhan Zhongke Xinyi is a high-tech enterprise integrating high-voltage testing and testing equipment, power metering instruments, battery DC system testing, power online monitoring system research and development, production, sales, consulting and power technology services.

Wuhan Zhongke Xinyi is a high-tech enterprise integrating high-voltage testing and testing equipment, power metering instruments, battery DC system testing, power online monitoring system research and development, production, sales, consulting and power technology services.

Measures to prevent the full shutdown of the substation:

1. Design transmission channels according to the importance of substations: four or more transmission channels shall be designed for especially important substations such as UHV substations and trans-regional interconnection substations; Three or more transmission channels shall be designed for 220kV-750kV main grid hub substations; Two or more transmission channels shall be designed for substations supplying power to important users, and multiple power sources cannot be taken to the same substation.

2.220kV and above hub substations and 110kV and below power supply substations for important users shall adopt double bus section connection or 3/2 connection mode. The two incoming lines of the same power point in 3/2 connection mode shall not be in the same string, and the substation shall not be completely shut down during bus or any outgoing line maintenance.

3.220kV and above hub substations and 110kV and below power supply substations for important users shall not all be erected on the same tower, and 220kV and above cable power supply shall not be laid in the same row of pipes or cable trenches to prevent the substation from being completely shut down due to faults.

4. Generally, it is not allowed to plan and construct substations with single incoming line or single main transformer or single bus. For substations with low power supply reliability requirements, when single incoming line or single main transformer or single bus is adopted, the equipment selection standard should be improved, and high-reliability equipment should be adopted to minimize the total shutdown of the substation.

5. For substations designed for double-bus and double-segment connection at the end of the period, the two bus couplers, two segment intervals and related 1. secondary equipment shall be put into operation according to the scale of the end of the period, so as to prevent the long-term single-bus operation of the substation from increasing the risk of full shutdown during the expansion of bus couplers and segments.

6. For substations with 3/2 connection mode, the main transformer should be prevented from being directly connected to the bus, so as to prevent the other running bus from tripping when the main transformer switch or current transformer is replaced and transmitted, resulting in the complete shutdown of the substation.

7. The operation of the substation can not meet the above requirements, should be in accordance with the principle of priority into the planning transformation.

As a provider of power testing and debugging solutions, Wuhan Zhongke Xinyi Power Technology Co., Ltd. has the obligation and responsibility to make China's power industry more perfect.

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Method of Preventing Substation Full Shutdown under Maintenance Mode

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