Title :
DCI Suppression strategy of three-phase grid-connected PV power generation system based on electrolytic capacitor
Author :
Zhang Guoyue ; Wu Yue ; Qi Donglian
Author_Institution :
Electr. Eng., Zhejiang Univ., Hangzhou, China
Abstract :
The issue of direct current injection (DCI) which is introduced in the transformless non-isolated PV generation system can decrease the quality of the output power, however, inadequate attention is focused on this problem. A new method is proposed based on electrolytic capacitor in order to suppress DCI, and non-ideal vector proportional-integral (NIVPI) controller is adopted to control the voltage of the electrolytic capacitor. The 17kVA 640VDC/220V50HzAC PV inverter is adopted as the plant, and the prototype and Matlab/simulink are both developed to confirm the effectiveness of the theory.
Keywords :
PI control; electrolytic capacitors; invertors; photovoltaic power systems; voltage control; DCI suppression strategy; Matlab; NIVPI controller; PV inverter; Simulink; direct current injection; electrolytic capacitor; nonideal vector proportional-integral controller; three-phase grid-connected PV power generation system; voltage control; Capacitors; Electronic mail; Harmonic analysis; Inverters; MATLAB; Power generation; DCI suppression strategy; NIVPI controller; electrolytic capacitor;
Conference_Titel :
Control Conference (CCC), 2013 32nd Chinese
Conference_Location :
Xi´an
