Research On Effect On Rural Power Grid Feeder’s Voltage Of Synchronization Of Distributed Photovoltaic Systems And Its Protection

The operation of distributed photovoltaic system and synchronized distributed network, research of the effect of synchronized network to original distributed network:safety, high efficiency, reliable operation.How to reliably combine distributed photovoltaic system with distributed network, and after synchronization, the impact for distributed network’s voltage will directly determine the application value of distributed photovoltaic systems, the quality of distributed network’s power supply and the operation stability.Because of the safety requirement of distributed network, in order for distributed photovoltaic system to have positive impact on distributed network’s safety, it is very important to study protection management for distributed photovoltaic system synchronization.This article explains the technical specialty of distributed photovotaic system, analyzes distributed photovoltaic system synchronization’s impact for the voltage of power feeder, determines capacity, location and power factor are three main factors for the the impact of distributed photovotaic system synchronization to distributed network, establishes distributed system load model to determine major factors of the impact of distributed photovotaic systems to distributed network.Finally, using the result of one distributed photovotaic system synchronization project, compare the measurement from the project with the simulation result for verification, according to the safety requirement of distributed network,analyzes the electric protection for the project and provides requirement.