摘要
LCL滤波器反馈状态变量实现有源阻尼需要高精度传感器才能具有较好的灵活性和鲁棒性,基于此,提出负二阶广义积分正交信号发生器反馈并网电流的有源阻尼方法,在抑制谐振尖峰的同时,也减少网侧电压背景谐波对并网电流的影响,同时减少传感器的个数,增加系统可靠性。采用极点配置法,围绕系统的稳定裕度设计负二阶广义积分正交信号发生器参数,探讨在该有源阻尼控制系统下LCL参数和电网阻抗变化时系统的鲁棒性。仿真结果表明,所提策略在各方面均有更好效果。
The realization of active damping for the feedback state variables of the LCL filter requires high precision sensors to have better flexibility and robustness.Therefore,this paper proposes an active damping method of grid-connected current fed back by negative second-order generalized integral quadrature signal generator.While suppressing the resonance peak,it also reduces the influence of grid-side voltage background harmonics on grid-connected current,and reduces the number of sensors to increase system reliability.The parameters of negative second-order generalized integral orthogonal signal generator are designed around the stability margin of the system by pole assignment method.Then,the robustness of the system is discussed when the LCL parameters and grid impedance change under the active damping control system.The simulation results show that the proposed strategy has better effect in all aspects.
作者
陈刚
刘亚雄
李国雄
刘旭阳
CHEN Gang;LIU Yaxiong;LI Guoxiong;LIU Xuyang(College of Electrical and Information Engineering,Hunan University of Technology,Zhuzhou 412007,China;State Grid Zhuzhou Power Supply Company,Zhuzhou 412000,China)
出处
《湖南电力》
2024年第5期50-56,共7页
Hunan Electric Power
基金
国家自然科学基金项目(62173136)。
关键词
负二阶广义积分正交信号发生器
LCL滤波器
有源阻尼
参数设计
negative second-order generalized integral quadrature signal generator
LCL filter
active damping
parameter design
