Abstract Protection performance is characterized by qualities that include selectivity, speed, sensitivity and stability. Generally, selectivity and speed present conflicting requirements on the protection design, as do sensitivity and stability requirements. The integration of distributed generation (DG), in particular at the distribution level, further compromises satisfactory achievement of these performance qualities. A recent paper by the authors introduced a protection algorithm based on active power differential and sensitivity analysis (APdSA) for the protection of active distribution systems and microgrids. This paper investigates the performance characteristics of this algorithm with respect to selectivity, sensitivity, stability, and speed. It is shown that, with an important modification to the protection zoning arrangement, the APdSA algorithm is able to selectively clear faults in a DG-integrated distribution system with high sensitivity, stability, and speed, with more than 95% reach over a wide range of fault resistances. The algorithm is also tolerant to communication failure.

中文翻译：

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有源配电系统功率差和灵敏度保护的性能评估

摘要 保护性能的特点包括选择性、速度、灵敏度和稳定性。通常，选择性和速度对保护设计提出了相互冲突的要求，灵敏度和稳定性要求也是如此。分布式发电 (DG) 的集成，特别是在配电级别，进一步损害了这些性能质量的令人满意的实现。作者最近发表的一篇论文介绍了一种基于有功功率微分和灵敏度分析 (APdSA) 的保护算法，用于保护有源配电系统和微电网。本文研究了该算法在选择性、灵敏度、稳定性和速度方面的性能特征。结果表明，通过对保护分区安排的重要修改，APdSA 算法能够选择性地清除 DG 集成配电系统中的故障，具有高灵敏度、稳定性和速度，覆盖范围超过 95% 的故障电阻范围很广。该算法还可以容忍通信失败。