摘要
针对公共电网频率波动时充电桩前级AC-DC整流器电能质量恶化等问题,在应用负荷虚拟同步机LVSM(load virtual synchronous machine)控制策略的基础上提出1种具有频率自适应能力的电流内环控制方法。首先,建立LVSM频率环路小信号模型,分析可知虚拟频率将跟随偏离基频的电网频率而变化。其次,设计1种降低计算复杂度的电流内环频率自适应准比例谐振控制器以抑制并网电流谐波注入电网。最后,仿真结果表明所提控制器能够主动响应电网电压及频率变化,并改善调节过程中的电能质量,验证了理论分析的正确性。
To address the problem of power quality deterioration in a charging pile’s front-stage AC-DC rectifier under frequency fluctuations of public power grid,a current inner-loop control method with frequency adaptation capability is proposed based on the application of a load virtual synchronous machine(LVSM)control strategy.First,a small-signal model of the LVSM frequency loop is established,and analysis results show that the virtual frequency will follow the grid frequency that deviates from the fundamental frequency.Second,a frequency-adaptive quasi-proportional-resonant controller with reduced computational complexity is designed for the current inner-loop to suppress grid-connected current harmonics injection into the grid.Finally,simulation results show that the proposed controller can actively respond to changes in grid voltage and frequency while improving the power quality during the regulation process,which verifies the theoretical analysis.
作者
吕志鹏
李立生
宋振浩
杨飞
王自力
陈燕东
LÜZhipeng;LI Lisheng;SONG Zhenhao;YANG Fei;WANG Zili;CHEN Yandong(State Grid Shanghai Energy Interconnection Research Institute Co.,Ltd.,Shanghai 200120,China;State Grid Shandong Electric Power Company,Jinan 250001,China;School of Electrical and Information Engineering,Hunan University,Changsha 410082,China)
出处
《电源学报》
北大核心
2025年第4期173-185,共13页
Journal of Power Supply
基金
国家电网公司科技资助项目(5400-202155459A-0-0-00)。
关键词
充电桩整流器
负荷虚拟同步机
频率自适应
离散准比例谐振控制
Charging pile rectifier
load virtual synchronous machine(LVSM)
frequency adaptation
discrete quasi-proportional-resonant control
作者简介
吕志鹏(1984-),男,博士,教授级高工。研究方向:配网电力电子,智能配电网与新能源并网控制。E-mail:dkylzp@126.com;李立生(1973-),男,硕士,高级工程师。研究方向:电力系统。E-mail:lilisheng@sd.sgcc.com;宋振浩(1989-),男,硕士,高级工程师。研究方向:电力系统,新型配网技术。E-mail:songzhenhao@epri.sgcc.com.cn;杨飞(1997-),男,硕士,工程师。研究方向:配电网电力电子,新能源稳定并网运行与控制。E-mail:dky_yf@163.com;王自力(1993-),男,中国电源学会学生会员,博士,讲师。研究方向:新能源分布式发电,微电网运行与控制。Email:ziliwang@hnu.edu.cn;通信作者:陈燕东(1979-),男,中国电源学会高级会员,博士,教授。研究方向:新能源发电系统建模与控制,微电网技术,特种电源技术。Email:yandong_chen@hnu.edu.cn。
