Research on Improving Droop Control Strategy of Electric Spring
LCL-ES is a novel demand-side management approach that effectively addresses voltage fluctuation issues caused by large-scale integration of renewable energy sources.However,when the grid consists of multiple LCL-ES units connected at different nodes,voltage drops occur due to line impedance.If adjacent LCL-ES units have the same reference voltage,it can result in repeti-tive voltage fluctuations between nodes or the loss of control in one group of LCL-ES units.To address these issues,a droop control strategy is proposed for multiple LCL-ES units,allowing automatic voltage adjustment based on their locations.Traditional droop con-trol cannot allocate reactive power adequately.To further optimize reactive power output during voltage regulation and prevent individ-ual LCL-ES units from overloading,a local consensus algorithm is utilized to obtain reactive power information of LCL-ES units.An adaptive virtual impedance is constructed based on reactive power to enhance reactive power allocation accuracy.Additionally,a volt-age compensation component is introduced to mitigate voltage drops caused by the virtual impedance.Finally,the effectiveness of the proposed control system is verified through simulations conducted on the MATLAB/Simulink platform.
electric springimproving droop controlreactive power consistencydistributed collaborative controladaptive vir-tual impedance
万方数据
维普
