A DC solid-state circuit breaker with freewheeling circuit
A solid-state circuit breaker and circuit breaker technology, applied in the field of flexible DC, can solve the problems of reducing reliability, increasing the interruption time, increasing the volume and cost of the circuit breaker, and achieving improved reliability, reduced number, and simple control Effect
Active Publication Date: 2020-01-10
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0033] An embodiment of the present invention provides a DC solid-state circuit breaker with a freewheeling circuit, such as figure 1 As shown, it mainly includes: a positive circuit breaker and a negative circuit breaker with the same structure and correspondingly installed on the positive and negative poles of the flexible direct current system;
[0034] The positive circuit breaker includes a positive current breaking circuit 1 and a positive fr...
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The invention discloses a direct-current solid-state circuit breaker with a continuous current circuit. The direct-current solid-state circuit breaker comprises a positive circuit breaker and a negative circuit breaker which are of the same structure and are installed at the positive pole and the negative pole of a flexible direct-current system respectively; the positive circuit breaker comprises a positive circuit breaker circuit and a positive continuous current circuit; the input end of the positive circuit breaker circuit is connected with the input end of the positive circuit breaker, the output end of the positive circuit breaker circuit is connected with the output end of the positive circuit breaker after being connected with one end of the positive continuous current circuit, and the other end of the positive continuous current circuit is grounded; the negative circuit breaker comprises a negative circuit breaker circuit and a negative continuous current circuit, the input end of the negative circuit breaker circuit is connected with the input end of the negative circuit breaker, the output end of the negative circuit breaker circuit is connected with the output end of the negative circuit breaker after being connected with one end of the negative continuous current circuit, and the other end of the negative continuous current circuit is grounded. Through the scheme, the generation of cut-off overvoltage can be avoided, and a brand-new technical route is provided for the development of a flexible direct-current system direct-current circuit breaker.
Description
technical field [0001] The invention relates to the field of flexible direct current, in particular to a direct current solid-state circuit breaker with a freewheeling circuit. Background technique [0002] Flexible DC technology is an efficient and flexible new power transmission and distribution technology, which has broad development prospects in power systems. The DC circuit breaker is the key equipment to ensure the safe and reliable operation of the flexible DC system. However, the current DC interrupter is a major bottleneck restricting the development of high-voltage and large-capacity flexible DC systems. Different from the zero-crossing point of AC current, DC fault current is more difficult to extinguish the arc, which brings great challenges to the development of high-voltage and large-capacity DC circuit breakers. DC circuit breakers can be classified into mechanical, solid state and hybrid DC circuit breakers. The DC solid-state circuit breaker is composed o...
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IPC IPC(8): H02H7/22H02H7/26
CPCH02H7/222H02H7/268
Inventor 贾科李猛毕天姝王聪博朱瑞
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)