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A mechanical DC circuit breaker and its charging circuit

A DC circuit breaker, mechanical technology, applied in the field of mechanical DC circuit breaker control, to achieve the effect of solving the withstand voltage capability and avoiding excessive floating potential

Active Publication Date: 2021-12-17
PINGGAO GRP +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a mechanical DC circuit breaker and its charging circuit, which is used to solve the problem that the floating potential in the mechanical DC circuit breaker challenges the withstand voltage capability of the equipment

Method used

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  • A mechanical DC circuit breaker and its charging circuit
  • A mechanical DC circuit breaker and its charging circuit
  • A mechanical DC circuit breaker and its charging circuit

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Embodiment Construction

[0021] The purpose of the present invention is to provide a mechanical DC circuit breaker and its charging circuit, which is used to solve the problem that the floating potential in the mechanical DC circuit breaker challenges the withstand voltage capability of the equipment.

[0022] To achieve the above object, the technical solution provided by the invention is:

[0023] A mechanical DC circuit breaker, comprising a main branch, an energy absorbing branch and a transfer branch; a main switch is arranged in the main branch, and the energy absorbing branch and the transfer branch are connected in parallel with the main switch; the transfer branch is provided with There are energy storage capacitors and inductors connected in series, the energy storage capacitor is connected to a charger, the positive end of the charger is connected to the positive end of the energy storage capacitor, the negative end of the charger is connected to the negative end of the electric energy stora...

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Abstract

The invention provides a mechanical DC circuit breaker and its charging circuit, including a main branch, an energy absorption branch and a transfer branch; a main switch is arranged in the main branch, and the energy absorption branch and the transfer branch are connected in parallel with the main switch ; The transfer branch is provided with a series energy storage capacitor and an inductor, the energy storage capacitor is connected with a charger, and also includes a first voltage stabilizing element and a second voltage stabilizing element, and one end of the first voltage stabilizing element is used to connect the positive voltage of the energy storage capacitor end, and the other end is grounded; one end of the second voltage stabilizing element is used to connect the negative end of the energy storage capacitor, and the other end is grounded. In the technical solution provided by the present invention, on the one hand, the floating potential at both ends of the energy storage capacitor can be clamped; Avoid the floating potential at both ends of the energy storage capacitor from being too high, thereby solving the problem that the floating potential challenges the withstand voltage capability of the equipment in the hybrid DC circuit breaker.

Description

technical field [0001] The invention belongs to the technical field of mechanical direct current circuit breaker control, and in particular relates to a mechanical direct current circuit breaker and a charging circuit thereof. Background technique [0002] At present, there are three main forms of medium voltage DC circuit breaker switch: mechanical DC circuit breaker, solid state DC circuit breaker and hybrid DC circuit breaker. Traditional mechanical circuit breakers have poor controllability and are difficult to break DC. Although the solid-state circuit breaker has short breaking time, long life and reliable operation, it has high cost, large on-state power consumption, difficult overload commutation protection, immature voltage and current equalization technology for power electronic products, and complicated control and detection technology. It is difficult to fully promote and apply it. [0003] The improved mechanical circuit breaker combines the breaking advantage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H9/04
CPCH02H9/045
Inventor 庞素敏韩桂全吴军辉卢彦辉李旭旭蔺广科王蝶王铭飞刘庆李永林毕迎华
Owner PINGGAO GRP
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