Study Of Microgrid Control And Protection Strategy

As the energy and environmental problems become increasingly prominent,the distributed power generation technology is undergoing a significant development in the world.Microgrid,which takes a part together with the power grid,is the most effective way to make use of the distributed power supply.This dissertation carried out the research on the microgrid control and protection strategies.The micro source model applicable to microgrid analysis is concluded.Working principles of the both stand-alone inverter and grid-connected inverter are comprehensively analyzed and systemic analysis of the control strategies are carried out.And then corresponding parameters are designed.According to the different microsources,PQ control and V/f control strategies are used separately,and corresponding controllers are designed.So microgrid model is established.Simulations are carried out using PSCAD to demonstrate the validity of the suggested method.After the fault analysis of microgrid,a protection method based on voltage is proposed.