Grid-connected inverters interface control with unified constant-frequency integration control

Author

Chunjiang, Zhang ; Lingling, Cao ; Herong, Gu ; Yanping, Zhu ; Weiyang, Wu

Author_Institution

Dept. of Electr. Eng., YanShan Univ., Qin Huangdao

Volume

2

fYear

2005

fDate

29-29 Sept. 2005

Firstpage

982

Abstract

A new control approach based on unified constant-frequency integration control (UCI) for current tracing is presented for photovoltaic grid-connected inverters. The working theory is analyzed and the control equation is deduced. The control approach is realized by a digital controller DSP. Different from the normal SPWM and PLL (phase locked loop) control approach in grid-connected inverters interface control, this control approach has the merit of automatic phase tracking capability, simplified control and high output power factor. And it can regulate the output in accordance with the dc voltage and grid voltage automatically

Keywords

PWM invertors; digital control; digital signal processing chips; frequency control; phase locked loops; photovoltaic power systems; power factor; power grids; power system control; DC voltage; DSP; PLL; SPWM; automatic phase tracking capability; digital controller; digital signal processor; grid voltage; phase locked loop control approach; photovoltaic grid-connected inverters interface control; power factor; sinusoidal pulse width modulation; unified constant-frequency integration control; Automatic control; Digital control; Digital signal processing; Equations; Inverters; Phase locked loops; Photovoltaic systems; Solar power generation; Tracking loops; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Electrical Machines and Systems, 2005. ICEMS 2005. Proceedings of the Eighth International Conference on

Conference_Location

Nanjing

Print_ISBN

7-5062-7407-8

Type

conf

DOI

10.1109/ICEMS.2005.202691

Filename

1574924