Control strategy for photovoltaic grid-connected inverter with LCL filter

Author

Zhang Guoyue ; Yin Ke ; Wu Yue ; Qi Donglian

Author_Institution

Electr. Eng., Zhejiang Univ., Hangzhou, China

fYear

2014

fDate

May 31 2014-June 2 2014

Firstpage

4770

Lastpage

4774

Abstract

A new control strategy for three-phase grid-connected inverter (GCI) of photovoltaic generation system (PVGS) with LCL filter is proposed. Based on the non-linear 3^rd-order model of the inverter, the robust active disturbance rejection control (ADRC), which is composed by the cascaded tracking differentiators (TD), the 4^th-order extended state observer (ESO), the non-linear PID (NLPID) and the disturbance compensating is designed to enhance the steady and dynamic performances of the PVGS. Experiments on a 10kW prototype are presented to verify the advantages of the proposed approach.

Keywords

compensation; invertors; nonlinear control systems; observers; photovoltaic power systems; power generation control; robust control; three-term control; 4th-order extended state observer; ADRC; ESO; GCI; LCL filter; NLPID; PVGS; TD; cascaded tracking differentiators; disturbance compensating; nonlinear 3rd-order model; nonlinear PID; photovoltaic generation system; photovoltaic grid-connected inverter; robust active disturbance rejection control; three-phase grid-connected inverter; Current control; Harmonic analysis; Inverters; Observers; Photovoltaic systems; Robustness; Grid-connected inverter; PV; Robustness; active disturbance rejection control;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (2014 CCDC), The 26th Chinese

Conference_Location

Changsha

Print_ISBN

978-1-4799-3707-3

Type

conf

DOI

10.1109/CCDC.2014.6853027

Filename

6853027