Hierarchical Coordination Control Strategy for Isolated Microgrid Based on Fuzzy Compensation
In islands microgrid,the output voltage of distributed generation(DG)units is difficult to unify due to the influence of equivalent line impedance and local load difference,which results in the distribution bias of reactive power closely related to voltage,resulting in reactive power circulations and affecting system stability.Therefore,this paper presents a hierarchical coordinated control strategy based on fuzzy compensation.Firstly,in the power allocation level,the average reactive power of the system is obtained by using the dynamic consistency algorithm.Then,through the pow-er balance level,the fuzzy controller is used to compensate the voltage in real time,and the voltage reference value is modified to achieve the rational distribution of reactive power.This strategy can share information among distributed en-ergy storage units without relying on global communication.It has high reliability and flexibility,and maintains the"Plug and Play"feature of each DG.Finally,Matlab/Simulink verifies the validity of the proposed control strategy.
microgriddroop controlreactive power sharingfuzzy controller
万方数据
维普
