A passive high-voltage DC circuit breaker and its realization method

A technology of high-voltage direct current and realization method, which is applied in the direction of high-voltage/high-current switches, circuits, circuit devices, etc., and can solve the problems that the breaking time cannot meet the requirements of the multi-terminal flexible direct current transmission system, high manufacturing cost, and high technical difficulty, so as to shorten the action The effect of time, low equipment cost and mature technology
CN104979795BActive Publication Date: 2018-10-09STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2018-10-09

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Abstract

The invention relates to a DC circuit breaker, in particular to a passive high-voltage DC circuit breaker and its realization method. The high-voltage DC circuit breaker includes a parallel energy absorption branch, a main branch, and a current transfer branch, and the current transfer branch includes a first current transfer branch and a second current transfer branch; the energy absorption branch is composed of a non-linear resistor ; The high-voltage DC circuit breaker is connected in series in the DC system, and the main branch circuit includes at least two sets of high-speed mechanical switches and at least two sets of full-control device modules connected in series. It also provides a method for implementing a passive high-voltage DC circuit breaker. The circuit topology of the present invention is simple, easy to control, and flexible in application. Reliability, the power electronic devices used are mainly semi-controlled thyristors, the series connection technology is mature, easy to implement, large breaking current capacity, high withstand voltage level, strong expansion ability, and low equipment cost.
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Description

technical field

[0001] The invention relates to a DC circuit breaker, in particular to a passive high-voltage DC circuit breaker and its realization method. Background technique

[0002] With the application of multi-terminal flexible DC and DC grid technology based on voltage source converter (VSC), fast DC circuit breakers have become one of the key equipment to ensure the stable, safe and reliable operation of the system. In the AC system, the AC current has two natural zero-crossing points in one cycle, and the AC circuit breaker uses the natural zero-crossing points of the current to cut off the current, while in the DC system, the DC current does not have a natural zero-crossing point, so the DC current The breaking of the current is much more difficult than the breaking of the alternating current.

[0003] There are usually three ways to break the DC current. One is to add an auxiliary circuit on the basis of the conventional AC mechanical circuit breaker to superimp...

Claims

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