SYSTEM AND METHOD FOR VOLTAGE-FREE SAMPLING COORDINATION CONTROL FOR MULTIPLE GRID-CONNECTED INVERTERS

摘要

A system and method for voltage-free sampling coordinated control for multiple grid-connected inverters. The system comprises multiple grid-connected inverters and one network voltage collection apparatus, wherein an input end of each of the grid-connected inverters is connected to a power generation unit; an output end of each of the grid-connected inverters is connected to a power grid by means of a common grid connection point; each of the grid-connected inverters is connected to a communication line; the network voltage collection apparatus is fitted on one of the grid-connected inverters; the grid-connected inverter collects network voltage information by means of the network voltage collection apparatus, and shares same with the other grid-connected inverters by means of the communication line; and the other grid-connected inverters achieve the grid-connected operation of a voltage-free sensor by means of the received shared network voltage information and locally collected voltage, current and power information.