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Voltage collapse detection based on local measurements

机译：基于局部测量的电压崩溃检测

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This paper is concerned with voltage collapse detection in power systems. The concepts of voltage support surface and local balancing equation are used. Likewise, the use of the impedance matching concept, requiring only measurements taken at the corresponding bus without needing a reference signal, is proposed. The impedance matching equation is solved by direct and a recursive least squares algorithm. The estimated equivalent impedance becomes a multiple of the load impedance. Thus, proximity indices to the point of collapse (PoC) that requires just voltage magnitudes are presented. Voltage instability is evaluated through direct detection of PoC in loads and transit (no-load) buses. Voltage stability margin calculation without requiring the load flow solution at the bifurcation point is proposed. Taking constant P-Q load characteristics into account, the method is tested on the IEEE 14-bus test system by the continuation power flow (CPF) to estimate the path that the impedance and the proposed indices follow through stable and unstable operation regions. A dynamic evaluation of the method is performed when exponential recovery and motor loads are embedded.
机译：本文涉及电力系统中的电压崩溃检测。使用了电压支撑表面和局部平衡方程的概念。同样地，提出了使用阻抗匹配概念，该阻抗匹配概念仅需要在相应的总线上进行测量而无需参考信号。通过直接和递归最小二乘算法求解阻抗匹配方程。估计的等效阻抗变为负载阻抗的倍数。因此，提出了仅需要电压大小的接近崩溃点（PoC）的指标。通过直接检测负载和传输（空载）总线中的PoC来评估电压不稳定性。提出了不需要分叉点潮流解的电压稳定裕度计算。考虑到恒定的P-Q负载特性，通过持续功率流（CPF）在IEEE 14总线测试系统上对该方法进行了测试，以估算阻抗和拟议指标通过稳定和不稳定工作区域所遵循的路径。嵌入指数恢复和电动机负载后，将对该方法进行动态评估。

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