基于伪微分反馈改进的虚拟同步发电机策略  

Improved Strategy of Virtual Synchronous Generator Based on Pseudo-derivative Feedback

作　　者：张赟宁[1,2] 向芳洲 周小萌 ZHANG Yun-ning;XIANG Fang-zhou;ZHOU Xiao-meng(College of Electrical and New Energy,China Three Gorges University,ichang 443000,China;Hubei Engineering Research Center for Smart Energy Technology,China Three Gorges University,ichang 443000,China)

机构地区：[1]三峡大学电气与新能源学院,湖北宜昌443000 [2]三峡大学智慧能源技术湖北省工程研究中心,湖北宜昌443000

出　　处：《控制工程》2020年第5期807-811,共5页Control Engineering of China

基　　金：国家自然科学基金(61603212);湖北省“楚天学者计划”。

摘　　要：传统的虚拟同步发电机并网控制系统,当负荷发生阶跃扰动时,将导致系统频率偏离额定频率,产生稳态功率偏差。针对上述问题,文章提出了一种基于伪微分反馈(Pseudo Derivative Feedback,PDF)改进的虚拟同步发电机控制策略。该控制策略在前向通路采用积分环节来消除稳态功率偏差;在反馈回路采用伪微分反馈环节,能够降低系统的超调量,缩短系统的调节时间。最后通过仿真结果对比,证明了文章提出的基于PDF改进结构的优越性。The traditional virtual synchronous generator grid-connected control system will cause the system frequency to deviate from the rated frequency in the case of step disturbance,resulting in steady state power deviation.Aiming at the above problems,this paper proposes an improved VSG strategy based on pseudo-derivative feedback.This control strategy uses the integration unit in the forward path to eliminate the steady-state power deviation and uses the pseudo-derivative feedback unit in the feedback loop,which effectively reduces the system overshoot and shortens the system adjustment time.Finally,the comparison of simulation results proves the superiority of the improved control structure proposed in the article.

关 键 词：虚拟同步发电机 伪微分反馈 有功控制 稳态性能 动态性能 

分 类 号：TM4[电气工程—电器]