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Islanding detection technique based on inverse hyperbolic secant function

机译：基于反双曲正割函数的孤岛检测技术

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摘要

This study presents an inverse hyperbolic secant function based islanding detection technique for distribution network containing various types of distributed generations. The proposed scheme is based on rate of change of inverse hyperbolic secant function of negative sequence voltage signal. Different non-islanding events along with various islanding conditions have been simulated by modelling IEEE 34-bus system using PSCAD/EMTDC software package. The proposed scheme is able to detect islanding condition even with zero active and reactive power mismatches. Moreover, it eliminates non-detection zone completely and at the same time also remains stable during diversified non-islanding events including change in network topology. The simulation results indicate that the proposed scheme not only detects islanding condition rapidly, but also provides better stability in case of critical non-islanding events during which most of the existing schemes issue nuisance tripping. Furthermore, comparative evaluation of the proposed scheme with the recently proposed techniques in the literature clearly indicates superiority of the proposed scheme. At the end, issues related to practical implementation of the proposed scheme have also been discussed.
机译：这项研究提出了一种基于反双曲正割函数的孤岛检测技术，用于包含各种类型的分布式发电的配电网络。所提出的方案基于负序电压信号的反双曲正割函数的变化率。通过使用PSCAD / EMTDC软件包对IEEE 34总线系统进行建模，可以模拟不同的非孤岛事件以及各种孤岛情况。所提出的方案即使在有功和无功功率不匹配为零的情况下也能够检测孤岛状态。此外，它完全消除了非检测区域，同时在包括网络拓扑变化在内的各种非孤岛事件中也保持了稳定。仿真结果表明，该方案不仅可以快速检测出孤岛状态，而且在大多数现有方案发出扰民跳闸的关键非孤岛事件的情况下，也能提供更好的稳定性。此外，与文献中最近提出的技术对提出的方案的比较评估清楚地表明了提出的方案的优越性。最后，还讨论了与拟议方案的实际实施有关的问题。

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