基于可达性的时域距离保护
Reachability-based Time-domain Distance Protection
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中文总结 AI 辅助
本文针对距离继电器故障检测问题，提出基于可达性的时域距离保护方法，通过构建降阶二维模型实现高效计算，可定义基于微分方程的瞬时故障测试。
中文摘要 AI 辅助
距离继电器通过本地电压和电流测量值检测输电线路上的故障。本文将故障期间距离继电器可观测的时域测量值集合表征为可达集，并基于基于集合的状态估计定义相应的故障测试，从而可将整个网络建模为含电压和电流源的RLC电路。通常，计算可达集和基于集合的状态估计是难以处理的，因此针对每种故障类型，我们基于继电器观测到的视在电压和电流构建了降阶的二维模型，这使所有计算高效，符合距离保护的标准量，还能基于未求解的微分方程定义瞬时故障测试。
英文摘要
Distance relays detect faults on transmission lines from local voltage and current measurements. In this paper, we characterize the set of time-domain measurements a distance relay can observe during a fault as a reachable set. We define corresponding fault tests in terms of set-based state estimation. This allows us to model the full network as an RLC circuit with voltage and current sources. In general, computing reachable sets and set-based state estimates is intractable. For each fault type, we construct a reduced-order, two-dimensional model in terms of the apparent voltage and current seen by the relay. This makes all computations efficient, aligns with standard quantities in distance protection, and allows us to define instantaneous fault tests in terms of unsolved differential equations.
