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논문 기본 정보

자료유형
학술저널
저자정보
Chao-Yuan Cheng (St. John’s University) Feng-Jih Wu (St. John’s University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.11 No.1
발행연도
2016.1
수록면
9 - 19 (11page)

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초록· 키워드

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Accurate models of the characteristics of typical inverse-time overcurrent (OC) protective devices play an important role in the protective coordination schemes. This paper presents a novel approach to determine the OC protective device parameters. The approach is based on the Eigensystem Realization Algorithm which generates a state space model to fit the characteristics of OC protective devices. Instead of the conventional characteristic curves, the dynamic state space model gives a more exact fit of the OC protective device characteristics. This paper demonstrates the feasibility of decomposing the characteristic curve into smooth components and oscillation components. 19 characteristic curves from 13 typical and 6 non-typical OC protective devices are chosen for curvefitting. The numbers of fitting components required are determined by the maximum absolute values of errors for the fitted equation. All fitted equations are replaced by a versatile equation for the characteristics of OC protective devices which represents the characteristic model of a novel flexible OC relay, which in turn may be applied to improve the OC coordination problems in the subtransmission and distribution systems.

목차

Abstract
1. Introduction
2. Models of Typical OC Protective Devices
3. Mathematical Description of ERA
4. Case Studies
5. Results Analysis
6. Practical Applications
7. Conclusions
References

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UCI(KEPA) : I410-ECN-0101-2016-560-002322576