Title :
Study on Improving Output Current Waveform of Photovoltaic Grid-Connected System
Author :
Shicheng, Zheng ; Peizhen, Wang ; Lusheng, Ge
Author_Institution :
Sch. of Electr. Eng. & Inf., Anhui Univ. of Technol., Ma´´anshan
Abstract :
Residential photovoltaic grid-connected systems are distributed power generation devices that convert the dc energy from the solar arrays to high-quality ac power at the utility grid interface. In this paper, the strategy, which based on repetitive control and feedforward control of utility grid, is applied to improve the output current waveform. First, it is shown that the commonly used photovoltaic grid-connected inverter topology, based on the SPWM modulated full-bridge converter. Then, the operational principle of system is analyzed, and the repetitive control is presented. Finally, the validity of the proposed strategy and its effect on the improvement of the quality of the output current waveform are verified through simulation and experiment
Keywords :
PWM power convertors; bridge circuits; feedforward; invertors; photovoltaic power systems; power station control; SPWM modulated full-bridge converter; distributed power generation devices; feedforward control; high-quality ac power; inverter topology; output current waveform; photovoltaic grid-connected system; repetitive control; solar arrays; utility grid interface; Circuits; Control systems; Current control; Energy consumption; Equations; Frequency; Photovoltaic systems; Pulse width modulation inverters; Solar power generation; Voltage; feedforward control; grid-connected system; photovoltaic; repetitive control;
Conference_Titel :
Industrial Electronics and Applications, 2006 1ST IEEE Conference on
Conference_Location :
Singapore
Print_ISBN :
0-7803-9513-1
Electronic_ISBN :
0-7803-9514-X
DOI :
10.1109/ICIEA.2006.257293
