A semi-controlled passive injection current type high-voltage DC circuit breaker and its realization method

A high-voltage direct current and current injection technology, applied in the direction of protection against overcurrent, can solve the problems of inability to meet the breaking time of multi-terminal flexible direct current transmission system, high manufacturing cost and technical difficulty, and achieve novel circuit topology, The effect of cost reduction and mature technology
CN103337829BActive Publication Date: 2016-08-10STATE GRID CORP OF CHINA +1
8 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2016-08-10

Smart Images

  • Figure 1
    Figure 1
Patent Text Reader

Abstract

The invention relates to a breaker of a direct current system, in particular to a semi-controlled passive injection current high voltage direct current breaker and a realization method thereof. The breaker comprises a high speed switch-IGBT1 (Insulated Gate Bipolar Translator1) module series branch, a non-linear resistor branch connected in parallel with the branch, and a bridge circuit consisting of power electronic devices, a capacitor, a reactor and a resistor. The breaker can charge an injection current capacitor directly from the running direct current system without an auxiliary circuit; with the adoption of a high speed mechanical switch, the advantage of low loss during normal breakover is kept; bidirectional current can be broken without an arc quickly; the breaker is novel in circuit topological structure, mature in technology, easy to realize, great in current breaking capability and high in withstand voltage level; and the cost is lowered greatly since the power electronic devices are mainly semi-controlled.
Need to check novelty before this filing date? Find Prior Art

Description

technical field

[0001] The invention relates to a circuit breaker of a direct current system, in particular to a semi-controlled passive injection current type high-voltage direct current circuit breaker and a realization method thereof. 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 c...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More