Dual-power-supply zero-discontinuity conversion method

Abstract

The invention discloses a dual-power-supply zero-discontinuity conversion method. Two rectification modules Z1 and Z2 are arranged, the rectification module Z1 is connected with a main power supply circuit, the rectification module Z2 is connected with a standby power supply circuit, and the main power supply circuit is provided with three input lines A1, B1 and C1 which are connected to the inputend of the rectification module Z1; the standby power supply circuit is provided with three input lines A2, B2 and C2 which are connected to the input end of the rectifier module Z2; the output endsof the rectifier module Z1 and the rectifier module Z2 are connected in parallel to the filter capacitor P and then connected with the inverter module Z3, the inverter module Z3 is connected with a boosting transformer Z4, and the output end of the boosting transformer Z4 is connected with the load circuit; compared with a common double-power-supply switching device, the circuit designed by the method solves the problem of interruption time in the double-power-supply switching process through a double-power-supply zero-interruption switching method, and the uninterrupted power supply requirement of a sensitive load can be met. Compared with an uninterruptible power supply mode, a storage battery pack is omitted, and the cost and the size of the system are reduced.

Description

technical field [0001] The invention relates to dual power supply control, in particular to a zero-interrupt conversion method for dual power supplies. Background technique [0002] A dual-power transfer switching device is composed of one (or several) transfer switching devices and other necessary devices for monitoring the power circuit and automatically converting one or several load circuits from one power source to another; The power conversion switch is suitable for dual power supply for key loads such as fire protection in the construction field. [0003] The existing dual power supply switching system products are mainly divided into two categories, one category uses electrical machinery as switching devices, such as dual power supplies of contactors, molded case circuit breakers / load isolating switches, and integrated automatic transfer switch appliances The switching system mainly uses mechanical and electrical devices such as spring energy storage, coils, and mot...

AI Technical Summary

Problems solved by technology

[0005] At the same time, due to the certain interruption time of ordinary dual power switching devices, ordinary dual power switching devices cannot meet the requirements of sensitive loads with high power requirements, and even require an uninterruptible power supply as a power supply.

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