Resonant DC interline power flow controller

Abstract

The invention relates to a resonant DC interline power flow controller. The resonant DC interline power flow controller comprises a left-end energy flow direction controller, a resonant solid transformer and a right-end energy flow direction controller, wherein input ends of the left-end energy flow direction controller are a first terminal and a second terminal and an output end is connected with the resonant solid transformer; the output end of the resonant solid transformer is connected with the input end of the right-end energy flow direction controller and the output ends of the right-end energy flow direction controller are a third terminal and a fourth terminal; and the resonant solid transformer is a bidirectional resonant converter. The DC interline power flow controller is capable of achieving flow control of DC energy in any direction; isolation of a circuit is achieved by using the resonant solid transformer; and the circuit efficiency is improved.

Description

technical field

[0001] The invention relates to the technical field of direct current transmission systems, in particular to a resonant direct current line-to-line power flow controller. Background technique

[0002] The multi-terminal direct current transmission system is a direct current transmission system consisting of three or more converter stations connected in series, parallel or hybrid. It can realize multi-source power supply and multi-drop power reception. The operation of the system is more economical and flexible, and it is one of the effective technical means to solve the problems of large-scale renewable energy grid integration, large-capacity long-distance power transmission and shortage of transmission corridors that my country is currently facing. The equivalent circuit of a typical ring network three-terminal DC transmission system is as follows: figure 1 As shown in , it is assumed that converter station 1 and converter station 2 are the converter station...

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