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首页> 外文期刊>Electric power systems research >Adaptive Under-Frequency Load-Shedding Considering Load Dynamics and Post Corrective Actions to Prevent Voltage Instability
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Adaptive Under-Frequency Load-Shedding Considering Load Dynamics and Post Corrective Actions to Prevent Voltage Instability

机译：考虑负载动力学和纠正措施的自适应下频率负载脱落，以防止电压不稳定

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摘要

The conventional under frequency load shedding (UFLS) strategies disconnect the preset amount of the load from the power grid in specific steps. These approaches ignore the daily load variations and the total outage costs, leading to a non-optimal solution. This paper proposes an adaptive UFLS scheme that considers the daily profiles of the different load types to minimize the total outage cost. To obtain the exact amount of the load to be shed, the dynamic performance of the load clusters is modeled. Furthermore, a series of post load-shedding corrective actions (PLSA) are implemented after the UFLS to satisfy the voltage constraints, using the installed reactive power control apparatus and static VAR compensators (SVCs). Two static (frequency-domain) and transient (time-domain) indexes are defined to evaluate the feasibility of possible UFLS/PLSA scenarios. The promising solutions are ranked and the most favorable ones are embedded in a number of look-up tables. The proposed UFLS/PLSA approach is applied to the main grid as well as the potential islands. The performance of the proposed adaptive UFLS/PLSA approach is tested on the IEEE 39-bus system via numerous scenarios, and the results show feasibility, fast and optimal performance of the proposed method.
机译：在频率负载脱落（UFL）策略下传统的常规在特定步骤中断开从电网的预设量。这些方法忽略了日常负荷变化和总停电成本，导致非最佳解决方案。本文提出了一种自适应UFLS方案，其考虑不同负载类型的日常轮廓，以最大限度地降低总停电成本。为了获得要脱落的载荷的确切量，为负载簇的动态性能被建模。此外，使用安装的无功功率控制装置和静态VAR补偿器（SVC），在UFL以满足电压约束之后实现了一系列后加载脱落校正措施（PLSA）。定义了两个静态（频域）和瞬态（时域）索引，以评估可能的UFL / PLSA方案的可行性。有希望的解决方案排名，最有利的解决方案嵌入了许多查找表中。所提出的UFL / PLSA方法应用于主电网以及潜在岛屿。所提出的自适应UFL / PLSA方法的性能经过多种情况，在IEEE 39总线系统上测试，结果显示了所提出的方法的可行性，快速和最佳性能。

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