Direct current breaker bridge type module

Abstract

The invention discloses a direct current breaker bridge type module. The direct current breaker bridge type module comprises an IGBT (insulated gate bipolar translator) press fitting unit, a capacitor bank, a stack bus bar, a control unit, an energy supply unit and a support frame, wherein the capacitor bank is electrically connected with the IGBT press fitting unit through the stack bus bar, the capacitor bank is connected with the control unit and the energy supply unit, and the IGBT press fitting unit, the capacitor bank, the stack bus bar, the control unit and the energy supply unit are located on the support frame. By adopting the technical scheme, bursting hidden dangers of a traditional welded module under a failure state are eliminated, the integration level of the direct current breaker bridge type module is greatly improved, the overall size of the direct current breaker bridge type module is reduced, a voltage peak of the direct current breaker bridge type module is effectively reduced when a large current is cut off, and simultaneously a large heat radiating area is further provided to the control unit.

Description

technical field [0001] The invention relates to a DC circuit breaker for manufacturing a DC power grid, in particular to a DC circuit breaker bridge module. Background technique [0002] In power systems with large capacity and high voltage such as power plants and substations, the DC system provides reliable power for equipment such as relay protection, operation control, signal audio, and emergency lighting. As one of the most important components in the DC system, The stable and reliable operation of small DC circuit breakers will directly guarantee the safety of the entire power system; the vigorous development of the information industry has ushered in the great development of the communication power supply, EPS, UPS and other DC power supply industries, and base stations and data centers have sprung up in China On the earth, in order to ensure the high precision requirements of the DC power supply, the DC circuit breaker, which is the most important operation and prote...

AI Technical Summary

Problems solved by technology

[0005] 1) The form of the fault is an open circuit, and it is prone to bursting when a fault occurs;

[0006] 2) The parasitic parameters of the device itself are relatively large, and the IGBTs in the module are connected through long busbars, which makes it extremely difficult to control the overall parasitic parameters (parasitic inductance, parasitic capacitance) of the bridge module, and it is easy to cause overcurrent and overvoltage phenomena;

[0007] 3) When soldered IGBTs are used in bridge modules, since the spacing of each IGBT is affected by surrounding components (laminated busbars, radiators, etc.), the power capacity per unit volume of the bridge module cannot be increased during layout.

[0008] The working principle and environment of DC circuit breakers make the existing modular unit structure no longer suitable for DC circuit breakers

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