The Transactions of the Korean Institute of Electrical Engineers A (대한전기학회논문지:전력기술부문A)
- Volume 48 Issue 7
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- Pages.824-831
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- 1999
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- 1229-2443(pISSN)
Limit Resolution in the Decoupled UPFC Model for Power Flow
조류계산을 위한 분리된 UPFC 모형에서의 제한값 해결
- Kim, Tae-Hyeon ;
- Seo, Jang-Cheol ;
- Im, Jeong-Uk ;
- Mun, Seung-Il (Dept.of Electronics Engineering, Seoul National University) ;
- Park, Jong-Geun (Dept.of Electronics Engineering, Seoul National University) ;
- Han, Byeon-Mun
- 김태현 (서울대 전기공학부 박사) ;
- 서장철 (서울대 전기공학부) ;
- 임정욱 (서울대 전기공학부 박사과) ;
- 문승일 (서울대 전기공학부) ;
- 박종근 (서울대 전기공학부) ;
- 한변문 (명지대 전기정보제어공학부)
- Published : 1999.07.01
Abstract
This paper presents new methods to resolve the important limits in the decoupled UPFC model for power flow, by which conventional power flow program can be performed with addition of two buses per one UPFC. In order to operate UPFC to the desired value, the series voltage and shunt current of UPFC should be computed. So a method of calculating these by simple equations after power flow is derived. However, the calculated magnitude of series voltage and/or shunt current of UPFC may not be allowed because of the UPFC limit \ulcorner to the ratings of inverters. In this case, the active power and the reactive power (or the voltage magnitude) of UPFC buses should be revised to resolve the limit. This paper proposes the Newton Raphson method to resolve these limits. Particularly, when resolving the series voltage magnitude, three strategies are proposed according to the priority of the active power and the reactive power (or the voltage magnitude).
Keywords
- Flexible AC Transmission Systems (FACTS);
- Unified Power Flow Controller (UPFC);
- Decoupled UPFC model for Power flow;
- Limit Resolution;
- Newton Raphson