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A novel loss-of-excitation protection scheme based on load angle variation of parallel snchronous generators
Citation
Rostami, A and Rezaei, N and Jalilian, A and Naderi, B and Negnevitsky, M, A novel loss-of-excitation protection scheme based on load angle variation of parallel snchronous generators, Proceedings of IEEE International Conference on Smart Technologies for Power, Energy and Control, 19-22 December 2021, Bilaspur, Chhattisgarh, India, pp. 1-6. ISBN 9781665443197 (2021) [Refereed Conference Paper]
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DOI: doi:10.1109/STPEC52385.2021.9718655
Abstract
The main weaknesses of the impedance-based loss of excitation (LOE) relay are its mal-operation during the power system disturbances (PSD) and its long detection time during LOE events. In this paper, to rectify the mentioned problems, a new LOE protection scheme is presented based on the load angle (δ) variation of the parallel synchronous generators (SGs) connected to a point of connection (POC). It will be shown that during a PSD, the variation of δ for all parallel SGs is similar such that their δ increases or decreases simultaneously. However, it will be shown that when the LOE happens in one of the parallel SGs, the δ of faulty SG increases while other SGs will experience reduction in their δ. Hence, when more than one SG is connected to a POC, the LOE condition can be discriminated from PSDs by the proposed LOE relay. However, when one SG is connected to the POC, the conventional impedance-based relay is employed to detect LOE/PSD. Since in real condition, the outage rate of the parallel connected SGs in a power plant is very low on a yearly basis, therefore, the contribution of the conventional impedance relay in detection of LOE/PSD is quite limited to some special instances. Simulation studies on a typical power prove high efficiency of the proposed algorithm.
Item Details
| Item Type: | Refereed Conference Paper |
|---|---|
| Keywords: | protection, Loss-of-excitation, impedance relay, load angle, parallel synchronous generators |
| Research Division: | Engineering |
| Research Group: | Electrical engineering |
| Research Field: | Electrical energy generation (incl. renewables, excl. photovoltaics) |
| Objective Division: | Energy |
| Objective Group: | Renewable energy |
| Objective Field: | Renewable energy not elsewhere classified |
| UTAS Author: | Naderi, B (Dr Seyedbehzad Naderi) |
| UTAS Author: | Negnevitsky, M (Professor Michael Negnevitsky) |
| ID Code: | 155282 |
| Year Published: | 2021 |
| Deposited By: | Engineering |
| Deposited On: | 2023-02-08 |
| Last Modified: | 2023-02-08 |
| Downloads: | 0 |
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