闫其乐, 高俊岭, 吴晶晶.基于线性二次型最优调节器的虚拟同步发电机控制策略[J].重庆工商大学学报(自然科学版),2020,37(2):23-28
YAN Qi-le,GAO Jun-ling, WU Jing-jing.Control Strategy of Virtual Synchronous Generator Based on Linear Two Order Optimal Regulator[J].Journal of Chongqing Technology and Business University(Natural Science Edition),2020,37(2):23-28
基于线性二次型最优调节器的虚拟同步发电机控制策略
Control Strategy of Virtual Synchronous Generator Based on Linear Two Order Optimal Regulator
  
DOI:
中文关键词:  虚拟同步发电机  线性二次型最优调节器  控制策略  有功功率  状态向量  系统稳定性
英文关键词:virtual synchronous generator  linear quadratic optimal regulator  control strategy  active power  state vector  system stability
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作者单位
闫其乐, 高俊岭, 吴晶晶 1. 安徽理工大学 电气与信息工程学院安徽 淮南 2320002. 合肥工业大学 电气与自动化工程学院合肥 230009 
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中文摘要:
      针对虚拟同步发电机控制下,功率调度指令突变时引起的系统频率波动以及频率偏移量较大的问题,提出了一种基于线性二次型最优调节器的VSG控制策略;通过分析输出频率动态响应特性,建立以角频率偏移量和功角偏移量为状态向量,输入有功功率偏差为控制向量的状态方程,求解系统最优控制规律,进行线性二次型最优调节器的设计;在Matlab/Simulink中搭建模型仿真,仿真结果表明:在负载扰动或有功阶跃工况下,基于线性二次型最优调节器的VSG控制策略,能够有效减小频率超调和暂态响应时间,改善频率动态响应特性;离网模式下系统暂态稳定性良好,即经过大幅扰动后频率可恢复至额定值,提高系统的运行稳定性。
英文摘要:
      A VSG(virtual synchronous generator,VSG) control strategy based on linear quadratic optimal regulator is proposed to solve the problem of frequency fluctuation and frequency offset caused by sudden change of power dispatching instructions under the control of virtual synchronous generator. By analyzing the dynamic response characteristics of the output frequency, the state equation with angular frequency offset and power angle offset as state vectors and input active power deviation as control vectors are established. The optimal control law of the system is solved and the linear quadratic optimal regulator is designed. Model simulation is built in Matlab/Simulink. The simulation results show that the VSG control strategy based on linear quadratic optimal regulator can effectively reduce frequency overshoot and transient response time and improve frequency dynamic response characteristics under load disturbance or active step conditions. In the off grid mode, the transient stability of the system is good, that is to say, the frequency can be restored to the rated value after a large disturbance, and the operation stability of the system can be improved.
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