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논문 기본 정보

자료유형
학술저널
저자정보
Amir Ghorbani (Islamic Azad University) Hossein Mehryari Lima (University of Tehran) Allahverdi Azadru (Islamic Azad University) Babak Mozafari (Islamic Azad University)
저널정보
대한전기학회 Journal of Electrical Engineering & Technology Journal of Electrical Engineering & Technology Vol.10 No.4
발행연도
2015.7
수록면
1,453 - 1,459 (7page)

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초록· 키워드

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Loss of excitation (LOE) relay is prevalently used to protect synchronous generator. The widely used method for synchronous generator LOE protection is a negative offset mho relay with two zones. The basis of this relay is identical to mho impedance relay. In other words, this relay calculates impedance by measuring voltage and current at the generator terminal. On the other hand, the presence of series compensation, changes measured voltage and current signals during loss of excitation. This paper reveals that the presence of series compensators such as fixed series capacitors (FSCs) and static synchronous series compensator (SSSC) causes a significant delay on the performance of generator LOE relay. It is also shown that the presence of SSSC causes the LOE relay to be under-reached. Different operating modes of the power system, the SSSC and also different percentages of series capacitive compensations have been considered in the modeling. All the detailed simulations are carried out in the MATLAB/Simulink environment using the SimPowerSystems toolbox.

목차

Abstract
1. Introduction
2. Loss of Excitation (LOE) Relay
3. Investigation and Modeling of SSSC
4. Impact of SSSC on the LOE Protection
5. Impact of FSCs on the LOE Protection
6. Conclusion
References

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