Parameter Design of Half-Bridge Converter Series Y-Connection Microgrid Grid-Connected Filter Based on Improved PSO-LSSVM

The half-bridge converter series Y-connection microgrid (HCSY-MG) is a new type of microgrid. In order to reduce the harmonic content in HCSY-MG grid-connected current and at same time simplify parameter design process LCL filter, this study proposed an filter method based on improved particle swarm optimization-least squares support vector machine (PSO-LSSVM) by analyzing characteristics current. addition, enhance convergence speed PSO-LSSVM, inertia factor during its parameters’ update made adjust adaptively according direction two consecutive changes constitute PSO-LSSVM. Through simulation comparative analysis, it demonstrated that PSO-LSSVM can speed; effectively simpler more comprehensive than existing method.