Optically controlled modular type mixed breaker based on series connection of vacuum breaker and SF6 breaker

Abstract

The invention discloses an optically controlled modular type mixed breaker belonging to the field of electric power high-voltage large-capacity breakers. On the basis of the existing vacuum breaker, SF6 breaker and photoelectric control, the optically controlled module type mixed breaker is formed. The permanent magnet control mechanism of an optically controlled vacuum breaker module is directlyconnected with an arc extinguish chamber and the like in the equipotential mode, and an inductive power supply coil directly obtains electric energy from load current to supplement a storage battery;a low-potential controller receives the on and off switching signals of a power system and controls the control mechanisms of the vacuum breaker and the SF6 breaker to move after carrying out synchronious coordination calculation on a low-potential end; and the on and off switching signasl received by the low-potential controller can be directly controlled by the computer of the power system. Theinvention can match the vacuum breaker module and the SF6 breaker module which have different parameters according to voltage levels to form the high-voltage large-capacity mixed breaker. The relevant modules have simple structure, reliable operation and long service life, are free from external interference, and can realize the large-capacity breaker the voltage level of which is more than 110 kV.

Description

technical field [0001] The invention belongs to the field of electric high-voltage and large-capacity circuit breakers, and relates to a practicable light-control modular hybrid circuit breaker, which is used to form high-voltage and ultra-high-voltage modular hybrid circuit breakers and fills up the blank in China. Background technique [0002] At present, there are two types of high-parameter circuit breakers in the field of high-voltage circuit breakers, one is vacuum circuit breakers, and the other is SF 6 breaker. SF 6 The circuit breaker adopts SF 6 As an arc extinguishing medium, it has excellent insulation properties, and it dominates at voltage levels of 110kV and above, and the breaking current is between 40 and 63kA. At present, the short-circuit capacity of my country's ultra-high voltage power system requires circuit breakers with a breaking capacity and corresponding dynamic and thermal stability capabilities of 63kA. With the development of 1000kV voltage l...

AI Technical Summary

Problems solved by technology

However, due to the restriction of technical conditions, in order to ensure the operation accuracy of each fracture of the hybrid circuit breaker, the overall structure of the existing hybrid circuit breaker abroad is complicated, it is difficult to be directly controlled by the computer system, the cost is expensive, and it cannot be used in a large area in the power system. Popularization and application, but domestic hybrid circuit breakers are still blank

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