An energy supply device applied to high-voltage DC circuit breakers

Abstract

The invention discloses an energy supply device applied to a high-voltage direct-current circuit breaker. According to the energy supply device, an air supply system and a fuel cell are arranged, thefuel cell is connected with a mechanical switch, and energy supply of the mechanical switch is realized in virtue of electric energy generated by the fuel cell. Thus, external power support or supplementation is not need, and the need for multi-stage voltage transformation is eliminated; the energy supply device is simple in design and high in reliability; and by controlling the flow of high-voltage insulating gas and / or the number of the fuel cell, output power can be controlled, so the different energy demands of the mechanical switch can be flexibly met, and energy can be continuously supplied to the mechanical switch. Eventually, the structure of the high-voltage direct-current circuit breaker is simplified; the controllability and voltage tolerance grade of the circuit breaker are improved; and the circuit breaker can withstand a high voltage of 500 kV and realize continuous operation for 10000 h or more.

Description

technical field [0001] The invention belongs to the technical field of power electronic devices, and in particular relates to an energy supply device applied to a high-voltage direct current circuit breaker. Background technique [0002] Today, more and more situations are applicable in high-pressure environments, and the requirements are becoming more and more stringent. For example, high-voltage DC circuit breakers are mainly used in DC transmission and distribution lines to break the current of DC lines. In order to reduce the on-state loss and shorten the operating time of the circuit breaker, DC circuit breakers using a hybrid of mechanical switches and power electronic devices have received more and more attention, and a variety of topologies have been derived. In this type of DC circuit breaker, the mechanical switch branch through which the current flows is called the main branch, and the power electronic device branch used to break the current is called the transfe...

AI Technical Summary

Problems solved by technology

[0004] For this reason, what the present invention aims to solve is the defect that the energy required for the switch in the high-voltage DC circuit breaker is complex in design, low in reliability, and difficult to meet the energy demand in the two states of switching action and non-action, and then provides a simple design, reliable An energy supply device applied to high-voltage DC circuit breakers that is high and can flexibly meet the energy demand in the two states of switching action and non-action

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