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
The line impedance in micro-grid is not pure inductive, and it does not match the capacity of distributed generation, therefore, the active power and reactive power are strongly coupled and the power cannot be distributed according to the capacity. Based on the improved traditional virtual impedance, an adaptive virtual impedance control strategy is proposed to reduce the coupling relationship between the power and distribute the reactive power according to the capacity. However, due to the characteristics of droop control and the utilization 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 proposed control strategy are verified by small signal stability analysis and simulation.
