摘要
针对传统的虚拟同步发电机(VSG)技术在馈线支路不同时功率分配不准确问题,提出了改进虚拟电阻补偿的VSG控制策略。根据低压微电网馈线阻抗的特点及其对下垂控制逆变器的功率调节的影响,建立了微源逆变器与馈线组合等效同步发电机的改进VSG模型,加入虚拟电阻来补偿逆变器的传输阻抗实现各微源逆变器功率的精确分配和无环流输出。通过对改进虚拟电阻补偿的VSG控制进行仿真分析,验证了所提控制策略的可行性和有效性。
In order to solve the problem of traditional virtual synchronous generator(VSG)technology inaccurate power distribution at different feeder branches,the VSG control strategy with improved virtual resistance compensation is proposed.According to the characteristics of low-voltage microgrid feeder impedance and its influence on power regulation of droop control inverter,the improved VSG model of equivalent synchronous generator composed of micro source inverter and feeder is established.Then,the virtual resistance is added to compensate the transmission impedance of the inverter to realize the accurate power distribution and circulating current free output of each micro source inverter.The simulation analysis of VSG control with improved virtual resistance compensation is carried out,and the simulation results verify the feasibility and effectiveness of the proposed control strategy.
作者
闫斌斌
葛亮
王伟宏
王曦
郜磊
YAN Binbin;GE Liang;WANG Weihong;WANG Xi;GAO Lei(State Grid Shanxi Electric Power Co.,Ltd.Maintenance Company,Taiyuan 030000,China)
出处
《黑龙江电力》
CAS
2021年第2期113-117,共5页
Heilongjiang Electric Power
关键词
低压微电网
馈线阻抗
虚拟电阻
虚拟坐标变换
功率分配
low voltage micro grid
feeder impedance
virtual resistor
virtual coordinate transformation
power distribution
