A Main Circuit Topology of Medium and High Voltage Direct Hanging Static Synchronous Var Compensator
A static synchronous, topological structure technology, applied in the direction of reactive power compensation, reactive power adjustment/elimination/compensation, etc., can solve the high and low voltage off-grid accidents of large-scale new energy power plants, cannot meet the dynamic and stable operation requirements of AC systems, Problems such as poor linearity of reactive power compensation can achieve high DC voltage utilization, improve grid adaptability, and improve survivability
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[0056] Such as figure 1 , the main circuit topology of the medium and high voltage direct-hanging static var compensator is composed of three single-phase conversion circuits, each single-phase conversion circuit is composed of upper and lower bridge arms, and each bridge arm is composed of a waveform generating circuit, a circulating current suppression reactance device and switch circuit. In the upper bridge arm, one end of the waveform generating circuit is connected together to form the positive pole of the common DC bus, and the other end is connected to the circulating current suppression reactor L a1 , L b1 , L c1 Connection; circulating current suppression reactor L a1 , L b1 , L c1 The other end of the switch with the toggle switch S a1 ,S b1 ,S c1 connect. In the single-phase conversion circuit, the topological structure of the upper and lower bridge arms is symmetrically distributed. The waveform generation circuit, the circulating current suppression react...
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