崔明勇,彭步鑫.基于自适应虚拟阻抗和相位补偿的改进下垂控制[J].电测与仪表,2023,60(9):157-164. Cui Mingyong,Peng Buxin.Improved droop control based on adaptive virtual impedance and phase compensation[J].Electrical Measurement & Instrumentation,2023,60(9):157-164.
基于自适应虚拟阻抗和相位补偿的改进下垂控制
Improved droop control based on adaptive virtual impedance and phase compensation
Because the line impedance in microgrid is not pure inductive, and the line impedance does not match the capacity of distributed generation, the active power and reactive power are strongly coupled and the power can not be distributed according to the capacity. Based on the traditional virtual impedance, an adaptive virtual impedance control strategy is proposed to reduce the coupling between the power and distribute the reactive power according to the capacity. However, due to the characteristics of droop control and the use of virtual impedance, the voltage and frequency are shifted, so the voltage compensation control and the improved phase compensation control are added to make the output voltage, phase and frequency consistent with the reference value. Finally, the rationality and effectiveness of the control strategy are verified by small signal stability analysis and simulation.
