Open AccessPower Quality Control Method of Distributed Generation Based on Improved PI and Repetitive Control
Author(s) -
Qingpai Ke,
Xuntao Shi,
Zhimin Yuan,
Jinyong Lei
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/782/3/032092
Subject(s) - control theory (sociology) , repetitive control , inverter , harmonic , feed forward , controller (irrigation) , power (physics) , computer science , compensation (psychology) , engineering , control system , control engineering , control (management) , physics , electrical engineering , psychology , agronomy , quantum mechanics , artificial intelligence , psychoanalysis , biology
In view of the similar structure between the distributed generation (DG) inverter and the active power filter (APF), it is of great significance to develop the DG inverters with harmonic suppression functions. The accurate tracking and rapid response to the phase and amplitude of the harmonic components is the guarantee of the effective use of the DG inverter to suppress the harmonic. In this paper, a harmonic suppression control method of DG inverter based on improved PI and repetitive control is proposed. This method can make the DG inverter output the active power of the fundamental wave by using the PI controller, and output the high precision harmonic current compensation by the repetitive controller. While considering the existence of a periodic delay in the repetitive controller, the feedforward control of harmonic components is added to speed up the dynamic response of harmonic suppression. Finally, the simulation results show that, compared with the traditional harmonic suppression method, the proposed control strategy can ensure the steady-state accuracy and dynamic response speed of the active output and harmonic suppression of the DG inverter while reducing the computational complexity.