A repulsion mechanism drive power supply

Abstract

The invention discloses an expulsive force mechanism drive power supply. The power supply includes a charging unit and a discharging unit. The charging unit includes a solid relay, a voltage regulator, a step up transformer with a tap, a first charging resistor, a second charging resistor, a single-pole double-throw switch, a high voltage charging subunit, a maneuvering charging subunit and a closed-circuit charging subunit. The discharging unit includes a high voltage discharging subunit, a maneuvering discharging subunit, a closed-circuit discharging subunit, a discharging resistor, a first contactor, a second contactor and a third contactor. According to the invention, the power supply, by being provided with one maneuvering charging subunit, is able to flexibly satisfy different requirements under different working conditions. The power supply is able to meet the requirements of simple closed and open circuits of traditional DC circuit breakers, and is also able to conduct open circuit at high and low speeds. Therefore, the power supply can satisfy the requirements for conducting open circuit at high speed of the expulsive force mechanism, and prolongs service life on the basis of conducting open circuit of common expulsive force mechanisms. The power supply also increases the function of re-open circuit, and can meet high requirements.

Description

technical field [0001] The invention belongs to the field of fast switches, and more specifically relates to a driving power supply for a repulsion mechanism. Background technique [0002] The circuit breaker is an important switching device in the power system. Because of its irreplaceable control and protection functions in the power system, the reliable operation of the circuit breaker is increasingly important. In view of this situation, the International Conference on Large Power Grids (CIGRE) has conducted several surveys around the world. The survey shows that most of the faults of circuit breakers are mechanical in nature, mainly including their operating mechanisms, monitoring devices, and auxiliary devices. As the voltage level increases, the number of components in the circuit breaker operating mechanism will increase, so the probability of failure will be higher. [0003] Due to the large number of action links and the large cumulative motion tolerance, the trad...

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Problems solved by technology

[0004] The opening speed under different working conditions and whether there is a need for reclosing have different requirements for the driving power of the repulsion mechanism. The IGBT components used in the traditional driving power are expensive and have low reliability. Therefore, it is necessary to design a Simple and reliable repulsion mechanism drive power supply to meet various operating needs

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