考虑时滞的并网逆变器改进反推PQ控制  

Improved Backstepping PQ Control for Grid-connected Inverters Considering Time Delay

作　　者：余洋 张千慧 庞淇文 YU Yang;ZHANG Qianhui;PANG Qiwen(Key Laboratory of Distributed Energy Storage and Microgrid of Hebei Province(North China Electric Power University),Baoding 071003,China;State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources(North China Electric Power University),Baoding 071003,China)

机构地区：[1]河北省分布式储能与微网重点实验室(华北电力大学(保定)),河北保定071003 [2]新能源电力系统全国重点实验室(华北电力大学(保定)),河北保定071003

出　　处：《智慧电力》2025年第3期69-76,共8页Smart Power

基　　金：国家自然科学基金资助项目(52077078)。

摘　　要：针对并网逆变器传统PQ控制存在的静态误差、参数整定困难等不足,并考虑采样、传输和计算等各类因素造成时滞的影响,提出了考虑时滞的改进反推PQ控制方法。首先,建立dq0坐标系下并网逆变器的数学模型,推导功率方程;继而,在给出基于反推控制的直接PQ控制方法的基础上,分析了时滞对于稳定性的影响;最后,引入含有时滞的Lyapunov函数,推导出考虑时滞的改进反推PQ控制器。仿真和实验证实,本方法在多种时滞下,比传统反推PQ控制更精确地跟踪功率指令,响应速度更快。在常规时滞下,能完全消除误差;在接近稳定时滞边界时,误差减少超50%。此外,本方法提高了逆变器稳定性,减少功率波动,有效减轻时滞的影响。To address the shortcomings of traditional PQ control in grid-connected inverters,such as static errors and difficulty in parameter tuning,and considering the impact of time delays caused by sampling,transmission,and computation,this paper proposes an improved backstepping PQ control method considering the time delays.Firstly,a mathematical model of the grid-connected inverter in the dq0 coordinate system is established,and the power equations are derived.Then,based on the direct PQ control method using backstepping control,the impact of the time delays on stability is analyzed.Finally,a Lyapunov function incorporating the time delays is introduced to derive an improved backstepping PQ controller considering the time delays.Simulations and experiments confirm that this method more accurately tracks power commands and responds faster than traditional backstepping PQ control under various time delays.Under normal time delays,the error is completely eliminated.When approaching the stability boundary of the time delays,the error is reduced by more than 50%.Additionally,this method improves inverter stability,reduces power fluctuations,and effectively mitigates the impact of the time delays.

关 键 词：并网逆变器 功率控制 PQ控制 反推控制 时滞 

分 类 号：TM464[电气工程—电器]