Proceedings of the KIPE Conference (전력전자학회:학술대회논문집)
- 2001.07a
- /
- Pages.501-505
- /
- 2001
Parallel Operation Control Technique of On-line UPS System
온라인 무정전전원장치의 병렬운전 제어기술
- Cho J.S. (Dept. of Electrical Eng Konkuk Univ.) ;
-
Kang B.H.
(Dept. of Electrical Eng Konkuk Univ.)
;
- Gho J.S. (Dept. of Electrical Eng Konkuk Univ.) ;
-
Choe G.H.
(Dept. of Electrical Eng Konkuk Univ.)
;
- Kim J.H. (International Electric Co) ;
- Chung S.E. (International Electric Co)
- 조준석 (건국대학교 전기공학과) ;
-
강병희
(건국대학교 전기공학과)
;
- 고재석 (건국대학교 전기공학과) ;
-
최규하
(건국대학교 전기공학과)
;
- 김진홍 (국제전기(주)) ;
- 정석언 (국제전기(주))
- Published : 2001.07.01
Abstract
The parallel operation system of UPS is used to increase reliability of power source at critical load. But parallel UPS system has a few defects, impedance is different from each other and circulating current occurs between UPSs, due to line impedance and parameter variation, though controlled by the same synchronization signal. According to such characteristic of parallel UPS, balanced load-sharing control is the most important technique in parallel UPS operation. In this paper, a novel power deviation compensation algorithm is proposed. it is composed of voltage controller to compensate power deviation that be calculated by using active and reactive current deviation between inverters on synchronous d-q reference frame.
Keywords