Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)
- 2008.06a
- /
- Pages.85-87
- /
- 2008
An active damping method of a grid-connected PWM Inverter using an instantaneous power theory
순시전력이론을 통한 계통연계 PWM 인버터 시스템의 능동댐핑 기법
- Jung, Hea-Gwang (School of Electrical and Computer Engineering AJOU University) ;
-
Lee, Kyo-Beum
(School of Electrical and Computer Engineering AJOU University)
;
-
Kang, Sin-Il
(PLASPO Co., Ltd.)
;
-
Lee, Hyen-Young
(PLASPO Co., Ltd.)
;
-
Kwon, Oh-Joeng
(PLASPO Co., Ltd.)
;
-
Song, Seung-Ho
(Department of Electrical Engineering Kwangwoon University)
- 정해광 (아주대학교 전자공학부) ;
-
이교범
(아주대학교 전자공학부)
;
-
강신일
((주) 플라스포)
;
-
이현영
((주) 플라스포)
;
-
권오정
((주) 플라스포)
;
-
송승호
(광운대학교 전기공학과)
- Published : 2008.06.30
Abstract
The demand of a three phase PWM inverter for the purpose of power control or grid-connecting is increasing. This inverter is connected to a grid through an L-filter or LCL-filter to reduce the harmonics caused by switching. An LCL-filter can reduce the harmonic of a low switching frequency and generate a satisfactory level of grid side current with a relatively low-inductance than an L-filter. But the additional poles caused by the LC part affects a stability problem due to induced resonance of the system. This paper presents a compensation method using a power theory to improve performance, the designed LCL-filter system and to reduce the stability problems caused by resonance. The effectiveness of the proposed algorithm is verified by simulations.