Parallel inverter circuit use as energy source of photovoltaic system, has parallelly connected inverters with power semiconductors for supplying energy to power grid, where power semiconductors are synchronously controlled

摘要

The circuit (1) has a set of parallelly connected inverters with power semiconductors for supplying energy to a power grid (2). One of the inverters serves as a master inverter (WRma) and has a control unit for generating control signals for the master inverter and slave inverters (WRsl). The power semiconductors of the inverters are synchronously controlled, and each slave inverter has a current compensation controller with a correction controller for producing a correction signal to generate corrected control signals for the slave inverters.