Tracking control method of power network harmonic current signal based on time delay compensation
ZUANG Jianhuang1, CHEN Yonghua2, HUANG Shaomin3, WANG Puzhuan3
(1.Putian power supply company of State Grid Fujian Electric Power Co, Ltd, Pu Tian 351100, China;
2.Sanming power supply company of State Grid Fujian Electric Power Co, Ltd, San Ming 365000, China;
3.Skills Training Center of State Grid Fujian Electric Power Co, Ltd, Quan Zhou 362000, China)
 

Abstract: Aiming at the serious harmonic pollution in power system, an active power filter based on IHAPF was used as the research object, and the tracking control method of harmonic current signal based on time delay compensation was proposed. The method was mainly composed of compensation Smith predictor with π and neural network PI control. In delay of Smith predictor with π compensation system from controlling the closed loop of internal conversion to the outside, so as to reduce the impact of time delay on system. The parameters of PI controller were optimized by PSOBP algorithm. The ITAE criterion to establish Smith predictor and PI control parameter the mathematical expression, and neural network optimization method for the optimal parameters of the two controllers. Finally, the method was presented in this paper was simulation, the simulation results show that compared with the traditional method has better dynamic response characteristics of steadystate compensation and higher precision.
Key words: harmonic current; delay time compensation; π compensation predictor; dynamic response