Probabilistic Under Frequency Load Shedding Considering RoCoF Relays of Distributed Generators
The activation of under frequency load shedding (UFLS) is the last automated action against the severe frequency drops in order to rebalance the system. In this paper, the setting parameters of a multistage load shedding plan are obtained and optimized using a discretized model of dynamic system fre...
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| Vydané v: | IEEE transactions on power systems Ročník 33; číslo 4; s. 3587 - 3598 |
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| Hlavní autori: | , , , |
| Médium: | Journal Article |
| Jazyk: | English |
| Vydavateľské údaje: |
IEEE
01.07.2018
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| Predmet: | |
| ISSN: | 0885-8950, 1558-0679 |
| On-line prístup: | Získať plný text |
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| Shrnutí: | The activation of under frequency load shedding (UFLS) is the last automated action against the severe frequency drops in order to rebalance the system. In this paper, the setting parameters of a multistage load shedding plan are obtained and optimized using a discretized model of dynamic system frequency response. The uncertainties of system parameters including inertia time constant, load damping, and generation deficiency are taken into account. The proposed UFLS model is formulated as a mixed-integer linear programming optimization problem to minimize the expected amount of load shedding. The activation of rate-of-change-of-frequency relays as the anti-islanding protection of distributed generators is considered. The Monte Carlo simulation method is utilized for modeling the uncertainties of system parameters. The results of probabilistic UFLS are then utilized to design four different UFLS strategies. The proposed dynamic UFLS plans are simulated over the IEEE 39-bus and the large-scale practical Iranian national grid. |
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| ISSN: | 0885-8950 1558-0679 |
| DOI: | 10.1109/TPWRS.2017.2787861 |