仅逆变器侧电流反馈的改进有源阻尼方法  

Improved active damping method with inductive current feedback on inverter side only

作　　者：李练兵 宋清翔 张文煜 杨海跃 LI Lianbing;SONG Qingxiang;ZHANG Wenyu;YANG Haiyue(College of Artificial Intelligence and Data Science,Hebei University of Technology,Tianjin 300131,China;State Grid Hebei Zhangjiakou Scenic Storage and Transportation New Energy Co.,Ltd.,Zhangjiakou 057000,China;Hengshui Power Supply Company of State Grid Hebei Electric Power Company,Hengshui 053000,China)

机构地区：[1]河北工业大学人工智能与数据科学学院,天津300131 [2]国网冀北张家口风光储输新能源有限公司,河北张家口075000 [3]国网河北省电力公司衡水供电公司,河北衡水053000

出　　处：《中国测试》2024年第8期180-188,共9页China Measurement & Test

基　　金：河北省重点研发计划项目(20314301D)。

摘　　要：基于状态变量反馈的有源阻尼(active damping,AD)控制方法常用于LCL型滤波器的谐振抑制,但传统的电压或电流反馈控制对传感器数量和精度有一定的要求,增加设计成本。为此,该文提出一种改进有源阻尼方法来减少传感器的使用。首先,通过对比无源阻尼(passive damping,PD)等效电路提出一种仅逆变侧电感电流反馈的AD控制策略;其次,结合控制系统稳定判据给出系统参数设计方法;最后,通过Matlab/Simulink仿真及30 kW样机实验测试该控制方法的有效性,测试结果表明,该方法能有效满足三相电网电压平衡情况下的宽范围并网需求,具有较好的并网逆变器过流保护、注入功率控制和有源阻尼谐振抑制性能,同时能够较好的减少传感器的使用数量,优化设计成本。Active damping(AD)control methods based on state variable feedback are commonly used for resonant suppression of LCL filters.However,traditional voltage or current feedback control has certain requirements on the number and accuracy of sensors,increasing design costs.Therefore,this paper proposes an improved active damping method to reduce the use of sensors.Firstly,by comparing passive damping(PD)equivalent circuits,an AD control strategy with only inductive current feedback on the inverter side is proposed;Secondly,the design method of system parameters is given based on the stability criteria of the control system;Finally,the effectiveness of this control method is tested through Matlab/Simulink simulation and a 30 kW prototype experiment.The test results show that this method can effectively meet the wide range grid connection requirements under three-phase grid voltage balance,and has good grid inverter overcurrent protection,injection power control,and active damping resonance suppression performance.At the same time,it can better reduce the number of sensors used and optimize design costs.

关 键 词：逆变器 有源阻尼 电流控制 LCL滤波器 

分 类 号：TB9[一般工业技术—计量学] TM464[机械工程—测试计量技术及仪器]