新型非线性控制方法在有源滤波器中的应用

夏向阳¹，周臻¹，李明德²，龚芬³，王恺²，刘飞龙⁴

(1. 长沙理工大学 电气与信息工程学院，湖南 长沙，410077；
2. 衡阳市产品质量监督检验所，湖南 衡阳，421001；
3. 株洲变流技术国家工程研究中心有限公司，湖南 株洲，412001；
4. 大唐耒阳发电厂，湖南 耒阳，412001)

摘 要：针对有源电力滤波器控制有实时性、动态性能和控制精度的要求，在基于输入输出间功率平衡特性下，建立基于功率平衡特性有源电力滤波器数学模型，同时提出一种新型非线性控制方法。该控制方法将非线性反馈控制方法和自适应控制相结合，设计参数自适应控制率，得到电网侧瞬时有功参考电流以及系统状态方程，实现在线路与负载参数时变未知的情况下，直流侧电容电压补偿控制和谐波电流的精确跟踪。Matlab/Simulink仿真和实验结果表明：该控制方法正确可行，并具有较好的动态特性和较强的鲁棒性。

关键词：有源电力滤波器；反馈线性控制；自适应非线性控制；状态方程；跟踪误差

Application of novel nonlinear control method in active power filter

XIA Xiang-yang¹, ZHOU Zhen¹, LI Ming-de², GONG Fen³, WANG Kai², LIU Fei-long⁴

(1. School of Electrical and Information Engineering, Changsha University of Science & Technology,
Changsha 410077, China;
2. Hengyang Products Quality Supervision and Inspection Institute, Hengyang 421001, China;
3. CSR Zhuzhou Electric Locomotive Research Institute Co. Ltd., Zhuzhou 412001, China;
4. Datang Leiyang Power Plant, Leiyang 421001, China)

Abstract:The controller of active power filter has the demand for real-time, dynamic performance and control accuracy, based on the balance of power between input and output, the mathematical model of active power filter was established, and the novel nonlinear control method was proposed. Combining the nonlinear feedback control with adaptive control, adaptive control rate of the parameter was designed, the power instantaneous active reference current and the system’s state equations which can ensure the stabilization of DC side capacitor voltage and track the harmonic currents accurately with unknown change in the parameters of lines and loads were obtained. Simulation and experimental results confirmed show that this control method is correct and feasible, and it has a better dynamic performance and stronger robustness.

Key words:active power filter; feedback linearization control; adaptive nonlinear control; state equation; tracking error