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

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