E3S Web Conf.
Volume 256, 20212021 International Conference on Power System and Energy Internet (PoSEI2021)
|Number of page(s)||4|
|Section||Energy Internet R&D and Smart Energy Application|
|Published online||10 May 2021|
Research on Optimal Coordination and Algorithms of Microprocessor-based Inverse Time Backup Protection
1 China Electric Power Research Institute, Haidian District, Beijing, 100192, China
2 The State Key Laboratory for security and energy saving, Haidian District, Beijing, 100192, China
* Corresponding author’s e-mail: firstname.lastname@example.org
Backup protection plays an important role in the safe operation of power grid, and it has important research value in the field of power system relay protection. Firstly, the research status and development opportunities of inverse time limit protection are analyzed, and then the best cooperation between inverse time limit protection and distance protection is discussed theoretically. According to the time constraint relationship in the protection range, an objective function satisfying the selectivity and speed is proposed. Secondly, in view of the difficulty in calculating the inverse time characteristic curve, a processing algorithm combining Taylor expansion method and look-up table method is proposed. Finally, the effectiveness and practicability of the method are verified by simulation experiments.
© The Authors, published by EDP Sciences, 2021
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