Electronic switch and hybrid type high-voltage direct-current circuit breaker

Abstract

The invention provides an electronic switch and a hybrid type high-voltage direct-current circuit breaker. The direct-current circuit breaker comprises a main branch circuit, a transfer branch circuitand an energy-consuming branch circuit which are connected in parallel; the main branch circuit and the transfer branch circuit are provided with electronic switches; the electronic switch comprisesa first branch circuit and a second branch circuit; at least three diodes are connected in series in each of the first branch circuit and the second branch circuit; the first branch circuit and the second branch circuit are connected in parallel; a first parallel end is connected with the anode of the first diode in the first branch circuit and the cathode of the first diode in the second branch circuit; a switching tube is disposed between the series connection point of the i-th diode and the (i+1)-th diode in the first branch circuit and the series connection point of the i-th diode and the(i+1)-th diode in the second branch circuit; and a corresponding lightning arrester is connected in parallel between the anode and cathode of each switching tube. With the electronic switch and the hybrid type high-voltage direct-current circuit breaker provided by the technical schemes of the invention adopted, the time of the transfer of fault current by the direct-current circuit breaker can beobviously shortened, and the manufacturing cost and operating cost of the hybrid type high-voltage direct-current circuit breaker are lower than those of direct-current circuit breakers of the same voltage level as the direct-current circuit breaker of the invention.

Description

technical field [0001] The invention belongs to the technical field of high-voltage direct current circuit breakers in power systems, and in particular relates to an electronic switch and a hybrid high-voltage direct current circuit breaker. Background technique [0002] At present, high-voltage direct current transmission technology has been widely used in my country, especially flexible direct current transmission technology, which makes direct current transmission technology applied to short-distance and small-capacity power transmission occasions. [0003] HVDC circuit breakers are very important equipment in flexible DC transmission systems. According to the working principle of DC circuit breakers, it can be divided into mechanical circuit breakers, all solid state circuit breakers and hybrid circuit breakers. Among them, hybrid circuit breakers have the advantages of less on-state loss, short breaking time, and no need for special cooling. , are widely used in flexib...

AI Technical Summary

Problems solved by technology

[0006] With the increase of the number of electronic switches in the DC circuit breaker, the volume of the DC circuit breaker is also increasing, and the occupied area and operating loss of the DC circuit breaker are also increased accordingly, which makes the manufacturing cost and operating cost of the DC circuit breaker relatively high.

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