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논문 기본 정보

자료유형
학술저널
저자정보
Sang-Seok Lee (Kyungpook National University) Ji-Ho Park (Koje College) Ki-Seok Jeong (Korea Railroad Research Institute) Heung-Guen Kim (Kyungpook National University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.11 No.5
발행연도
2016.9
수록면
1,128 - 1,136 (9page)

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초록· 키워드

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This paper presents a load-shedding scheme for a large steelworks with several self-generation units. The power system of the steelworks can be separated from a utility grid in case of disturbances. Also, some substations with generators in the steelworks can be isolated due to the tie line tripping. These situations cause an under-frequency events as the result of the imbalance between generation and load. A system stabilizing controller (SSC) system is the core of the proposed load shedding scheme for the frequency stabilization. The SSC system performs a pre-calculation for load-shedding (LS) quantity before an event and a post-calculation to provide against a deficient load-shedding in the pre-calculated load-shedding. The back-up protection system is used to counteract situations in which the SSC system does not operate normally. Also, the load-shedding by frequency calculation is carried out for subsequent disturbance such as an additional generator tripping. The hardware based proposed scheme has been applied to the steelworks. The several under-frequency events causing a load-shedding are examined through the transient stability analysis by using ETAP. The simulation results show that the proposed scheme effectively stabilizes the frequency within the continuous frequency operation range of generators.

목차

Abstract
1. Introduction
2. Study System Description
3. Proposed UFLS Scheme
4. Case Study
5. Conclusion
References

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