基于链式拓扑的SVG可靠性分析和容错控制

In order to make the SVG(Static Var Generator) work and compensate reactive power when the fault occur, the system should be controlled by redundant and fault-tolerant control based on the analysis of system reliability. When the redundant and fault-tolerant control is used,there are some H-bridge cascade will be cut off. Every H-bridge cascade have a bypass device to make every H-bridge cascade can be cut off when it fault. After compating with two control method of capacitor voltage when fault occur,redundant rotation is adopted,which can avoid the change of capacitor voltage and can make sure the modulation degree will not be too low. At last,the simulation in Matlab/Simulink prove the control method is available