李广浩,彭克,张新慧,李海荣,刘磊.直流配电系统接口换流器虚拟同步发电机自适应惯性控制策略[J].电测与仪表,2021,58(9):135-141. li Guanghao,Peng Ke,Zhang Xinhui,Li Hairong,Liu Lei.Adaptive Synchronous Control Strategy of Virtual Synchronous Generator of DC Power Distribution System Interface Converter[J].Electrical Measurement & Instrumentation,2021,58(9):135-141.
直流配电系统接口换流器虚拟同步发电机自适应惯性控制策略
Adaptive Synchronous Control Strategy of Virtual Synchronous Generator of DC Power Distribution System Interface Converter
The DC distribution network has low inertia and weak damping characteristics, and disturbances such as load switching and distributed energy output fluctuations will have a serious impact on the DC bus voltage. Based on the virtual synchronous generator control in analog AC system, this paper proposes an adaptive inertial control strategy for DC virtual synchronous generator based on voltage-current droop control. A small-signal model of DC virtual synchronous generator is established, and the transfer function between the DC bus voltage and the DC side output current of the converter is derived. According to the characteristics of DC bus voltage transient oscillation, an adaptive virtual inertia coefficient strategy is designed. The simulation results show that the pro-posed control method can improve the transient response of the system and improve the stability of the DC dis-tribution system.
