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Voltage collapse risk assessment

机译：电压崩溃风险评估

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Severla approaches have been proposed in the literature to analyze system voltage collapse, based on indices that can efficiently evaluate the load margin for which the system remains stable. All this discussion, including possible methods of solution, is being carried out under deterministic assumptions; load, generation and transmission are defined for each operating condition. The basic idea is to obtain the maximum amount of load the system can support, and what distance it is from this condition. In this work, the voltage collapse problem is reviewed, considering the stochastic nature of the load. A probabilistic methodology is developed to provide risk indices of voltage collapse, based on a combination of the tangent vector and Monte Carlo simulation methods. It is also shown how a probabilistic load flow analysis can be adapted to evaluate the proposed risk indices. In order to illustrate the proposed approach, a modification of the IEEE reliability test system is used and the applicability of the results to operation and expansion planning is discussed.
机译：文献中已经提出了Severla方法来分析系统电压崩溃，该方法基于可以有效评估系统保持稳定的负载裕量的指标。所有这些讨论，包括可能的解决方法，都是在确定性假设下进行的；针对每个运行条件定义了负载，发电和传输。基本思想是获得系统可以支持的最大负载量，以及与该条件的距离。在这项工作中，考虑了负载的随机性，研究了电压崩溃问题。基于切线矢量和蒙特卡洛模拟方法的组合，开发了一种概率方法来提供电压崩溃的风险指标。还显示了如何通过概率潮流分析来评估建议的风险指标。为了说明所提出的方法，使用了对IEEE可靠性测试系统的修改，并讨论了结果对操作和扩展计划的适用性。

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