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Adaptive Load Encroachment Prevention Scheme For Distance Protection

机译:距离保护的自适应负载入侵预防方案

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摘要

In this paper, a new adaptive load encroachment prevention scheme based on steady-state security analysis and adaptive anti-encroachment zone (AEZ) is proposed. The new scheme identifies the vulnerable distance relays through real-time security analysis. Selected dual contingencies are included to reflect the influence from the "hidden failures" of protection systems. Effective measures are taken to improve the computational efficiency. The AEZ will be designed online to prevent the undesired tripping if the analysis shows that a distance relay may suffer the load encroachment for a particular scenario. To ensure the dependability of the protection system, the AEZ will be applied only when its introduction is necessary. The effectiveness of the new scheme can be verified through the test cases in this paper.
机译:提出了一种基于稳态安全分析和自适应防入侵区(AEZ)的自适应负载防入侵方案。新方案通过实时安全分析来识别易受攻击的距离继电器。包括了一些双重意外情况,以反映保护系统“隐藏故障”的影响。采取有效措施来提高计算效率。如果分析显示距离继电器在特定情况下可能会受到负载侵害,则将在线设计AEZ以防止意外跳闸。为确保保护系统的可靠性,仅在需要引入AEZ时才使用AEZ。通过本文的测试案例可以验证新方案的有效性。

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