Design method of 10kV switch

Abstract

The invention provides a design method of a 10kV switch. The design method comprises the steps of: calculating the number of thyristor units, selecting and connecting static voltage-sharing resistors, dynamic voltage-sharing capacitors and dynamic voltage-sharing resistors which are required for forming the thyristor units, selectively connecting a first isolation knife switch, a thyristor valve and a second isolation knife switch, connecting the first isolation knife switch with a bus, and connecting the second isolation knife switch with a grounding power supply. The design method provided by the invention is simple, effective and reliable; the high-voltage switch is re-optimized and redesigned at the source of equipment, the designed 10kV all-electronic type solid-state switch is fast in opening and closing speed, no-arc, light-free and soundless in action, replaces a traditional mechanical circuit breaker, avoids the defects of slow action speed, short mechanical life, high noise and the like, can fully realize the more rapid and flexible on-site commissioning of the switch in a transformer substation, ensures the normal operation of the transformer substation and improves the operating efficiency of the transformer substation.

Description

technical field [0001] The invention relates to the field of switch cabinet design, in particular to a design method for a 10kV switch. Background technique [0002] The main function of the switchgear is to open and close, control and protect electrical equipment during the process of power generation, transmission, distribution and power conversion in the power system. The components in the switch cabinet are mainly composed of circuit breakers, disconnectors, load switches, operating mechanisms, transformers and various protection devices. It is mainly suitable for various occasions such as power plants, substations, petrochemicals, metallurgical steel rolling, light industry and textiles, factories and mines, residential quarters, and high-rise buildings. Electronic solid-state switches using thyristor devices as switching elements can replace traditional mechanical switches. Because there are no mechanical moving parts in this type of switch, it is called a solid-stat...

AI Technical Summary

Problems solved by technology

[0003] Most of the switches in existing domestic substations adopt the simple stacking mode of the above-mentioned conventional equipment. Although there is almost no loss during operation, the breaking time of the fault current is still li

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