Mixed solid state DC current-limiting type circuit breaker

A circuit breaker and current limiting technology, which is applied in the direction of emergency protection circuit devices, circuit devices, emergency protection circuit devices, etc. for limiting overcurrent/overvoltage, and can solve the problems of limiting solid-state switch applications, poor overload capacity, and device loss Large and other problems, to achieve the effect of effectively breaking short-circuit current, fast breaking speed, and good protection effect

Active Publication Date: 2018-10-12
HARBIN ENG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The solid-state switch composed of power semiconductor devices has the advantages of no arc, rapid breaking and high reliability, but at the same time has the disadvantages of limited capacity, poor overload capacity, and large device loss, which greatly limits the application of solid-state switches in ship power systems. application in

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  • Mixed solid state DC current-limiting type circuit breaker
  • Mixed solid state DC current-limiting type circuit breaker
  • Mixed solid state DC current-limiting type circuit breaker

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Embodiment Construction

[0037] The present invention will be further described below in conjunction with the accompanying drawings:

[0038] A hybrid solid-state DC current-limiting circuit breaker comprises a rectified synchronous generator or a DC bus 1, a high-speed repulsive mechanical switch 2, a power electronic composite switch 3, an on-state switch 4, a buffer circuit 1 5, a buffer circuit 2 6, a high resistance Current limiting circuit 7 , reverse voltage charging circuit 8 , freewheeling circuit 9 , smoothing reactor 10 and DC load 11 . The schematic diagram of the principle structure is as follows figure 1 As shown, the figure includes a high-speed repulsive mechanical switch S, and the high-power gate can turn off the thyristor T 1 , power electronic composite switch, insulated gate bipolar thyristor T 2 , the power diode D 1 ~D 5 , the capacitance C 1 ~C 3 , the constant value resistor R 1 , R 2 , R 3 , R 5 , thermistor R 4 , the inductance L 1 , L 2 , the number of parallel...

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Abstract

The invention relates to a mixed solid state DC current-limiting type circuit breaker comprising a rectifying synchronous generator or a DC bus (1), a high-speed repulsion force mechanical switch (2),a composite electronic power switch (3), an on-state switch (4), a first buffer circuit (5), a second buffer circuit (6), a high resistance current-limiting circuit (7), a reverse voltage charging circuit (8), a freewheeling circuit (9), a smoothing reactor (10) and a direct current load (11). The high resistance current-limiting circuit provided by the invention is continuously on after the composite electronic power switch is switched off, so that the direct current power system of the ship is more stable; the freewheeling circuit is arranged on the load side, so that after the direct current circuit is broken, a release loop is provided for energy stored in the direct current circuit and the load, and the raising speed of the short circuit current is limited; the current-limiting rangeof the short circuit current can be self-designed according to the requirement of the direct current system of the ship, the breaking speed is fast, the raising speed of the short circuit current ofthe direct current circuit and the range of the short circuit current are limited, and the short circuit current of the direct current circuit is effectively broken.

Description

technical field [0001] The invention relates to a circuit breaker, in particular to a hybrid solid-state DC current-limiting circuit breaker, which belongs to the field of power system automation, and belongs to the short-circuit current-limiting and circuit breaking protection technology of DC power transmission. Background technique [0002] The ship power system belongs to the limited power grid. Compared with the land power short circuit fault, when a short circuit fault occurs at a single point of the ship power station, the short circuit current has the characteristics of large peak value and short maintenance time. The excessive short circuit peak current has exceeded the existing ship circuit breaker. The limit connection and breaking capacity of the circuit breaker makes it more difficult to achieve graded protection of the circuit breaker, and even cause a power outage on the whole ship in severe cases. Therefore, it has become a hot research topic at home and abro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087H02H9/02
Inventor 张敬南韩静李南虬孟繁荣程鹏张强
Owner HARBIN ENG UNIV
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