Flexible direct current transmission converter valve submodule redundancy energy taking device and control method thereof

Abstract

The invention relates to a flexible direct current power transmission converter valve submodule redundancy energy taking device and a control method thereof. The device comprises a secondary side regulation flyback switching power supply (SSR-flyback), a primary side regulation flyback switching power supply (PSR-flyback) module and a power supply management module, wherein the PSR-flyback module is called as PSR-flyback for short, and the PSR-flyback module is called as PSR-flyback for short. The SSR-flyback module takes electricity from a power sub-module capacitor, and generates a direct current output voltage in a primary side current and secondary side voltage feedback mode; the PSR-flyback module takes electricity from a power sub-module capacitor, and generates a direct current output voltage by using a primary side current and primary side voltage feedback mode; and the voltage generated by the SSR-flyback module and the PSR-flyback module is controlled and output by the PM power management module and is provided for the sub-module control unit to use. The energy taking device provided by the invention can replace a dual-power-supply direct redundancy scheme, the compact design of the device is realized, the anti-interference capability of the energy taking device is improved, the requirement of high output precision can be met, the energy taking device has the advantages of long service life and low failure rate, and the problems of short service life and high failure rate of an existing control unit energy taking device are well solved.

Description

technical field [0001] The invention relates to the technical field of flexible high-voltage direct current transmission, in particular to a redundant energy harvesting device for a converter valve sub-module of a flexible direct current transmission and a control method thereof. Background technique [0002] The energy harvesting device is the key equipment in the power sub-module of the flexible direct current transmission converter valve. During the operation of the flexible direct current transmission converter valve, the energy harvesting device has high output accuracy and low failure rate requirements. Unstable output or high failure rate of the energy harvesting device may cause a decrease in the redundancy of the power sub-modules of the flexible HVDC converter valve, and in severe cases may cause the system to trip and stop operating. In the prior art, manufacturers of flexible DC transmission converter valves usually use single-side regulation flyback switching po...

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Problems solved by technology

[0003] Based on the above situation of the prior art, the purpose of the present invention is to provide a redundant energy harvesting device for the sub-module of the flexible direct current transmission converter valve and its control method, so as to solve the short life and high failure rate of the existing control unit energy harvesting device The problem

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