摘要
自同步电压源逆变器SSVSI(self-synchronized voltage source inverter)因能改善新型电力系统电压与频率稳定性而备受关注。为解决多光储SSVSI并联运行时储能荷电状态SOC(state-of-charge)不均衡、直流侧电压波动与交流侧输出功率振荡的问题,首先分析了多光储SSVSI并联系统交直流侧功率响应的动态特性,然后提出了多光储SSVSI并联系统协调控制方法。该协调控制方法通过考虑储能SOC的协调分配策略与储能功率前馈控制,实现储能SOC动态均衡,改善直流侧电压的动态特性。此外,通过阻尼增强控制抑制了交流侧输出功率振荡。最后,通过仿真和RT-LAB实验验证了所提控制方法的有效性。
Self-synchronized voltage source inverters(SSVSIs)have attracted much attention for their capability to improve the voltage and frequency stability of power systems.To solve the problems of energy storage state-of-charge(SOC)imbalance,DC-side voltage fluctuations and AC-side output power oscillations during the parallel operation of PV-storage SSVSIs,the dynamic characteristics of AC-and DC-side power response of a parallel system of PV-storage SSVSIs are analyzed at first.Then,a cooperative control method for the parallel system is proposed,which realizes the dynamic balance of energy storage SOC by considering a cooperative allocation strategy for energy storage SOC and improves the dynamic characteristics of DC-side voltage through the feed-forward control of energy storage power.In addition,the AC-side output power oscillations are suppressed by damping enhancement control.Finally,the effectiveness of the proposed control method was verified by simulations and experimental results based on RT-LAB.
作者
周可慧
符有泽
陈燕东
张明宇
唐海国
游金梁
ZHOU Kehui;FU Youze;CHEN Yandong;ZHANG Mingyu;TANG Haiguo;YOU Jinliang(Electric Power Research Institute,State Grid Hunan Electric Power Co.,Ltd.,Changsha 410007,China;National Engineering Research Center for Power Conversion and Control(Hunan University),Changsha 410082,China)
出处
《电源学报》
北大核心
2025年第4期242-254,共13页
Journal of Power Supply
基金
国家自然科学基金资助项目(52077070)
国网湖南省电力有限公司科技资助项目(5216A321N301)。
关键词
自同步电压源逆变器
荷电状态
功率分配
功率振荡
Self-synchronized voltage source inverter(SSVSI)
state-of-charge(SOC)
power allocation
power oscillation
作者简介
周可慧(1996-),女,硕士,工程师。研究方向:配电网与分布式能源。E-mail:epzhou@foxmail.com;符有泽(1998-),男,中国电源学会学生会员,博士研究生。研究方向:新能源发电建模与控制技术。E-mail:fuyouze@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。E-mail:yandong_chen@hnu.edu.cn;张明宇(1999-),男,中国电源学会学生会员,硕士研究生。研究方向:新能源稳定并网运行与控制。E-mail:mingyu.zhang@hnu.edu.cn;唐海国(1985-),男,硕士,高级工程师。研究方向:配电网与分布式能源。E-mail:homebbs2085@163.com;游金梁(1995-),男,硕士,工程师。研究方向:智慧配电网。E-mail:youjinliang716@qq.com。
