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首页> 外文期刊>International journal of electrical and power engineering >Voltage Stability Based Collapse Prediction and Weak Cluster Identification
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Voltage Stability Based Collapse Prediction and Weak Cluster Identification

机译：基于电压稳定性的崩溃预测和弱簇识别

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摘要

Voltage instability is a Phenomenon that could happen in a power system due to stressed condition. The result would be the occurrence of voltage collapse which leads to total blackout of the whole system. Therefore, voltage collapse prediction is important in power system planning and operation so that the occurrence of voltage collapse due to voltage instability could be avoided. Line outage in a power system could also, lead to the event of the voltage collapse which implies the contingency in the system. Contingency problem caused by line outage has been identified as one of the main reason to voltage instability in power system. This study presents, a new technique for contingency ranking based on voltage stability condition in power system. A new line stability index was formulated and used to identify the critical line outages and sensitive lines in the system. The line outage contingency ranking was performed on several loading condition in order to identify the effect of increase in loading to the critical line outages. Correlation study on the results obtained from contingency ranking and voltage stability analysis were also, conducted and it is found that line outages at the weak lines would cause voltage instability condition to a system. Subsequently, using the result from the contingency ranking weak areas in the system can be identified. The proposed contingency ranking technique was tested on IEEE reliability test system.
机译：电压不稳定性是由于压力条件而可能在电力系统中发生的现象。结果是发生电压崩溃，从而导致整个系统完全停电。因此，电压崩溃预测在电力系统规划和运行中很重要，因此可以避免由于电压不稳定性而导致电压崩溃的发生。电力系统中的线路中断也可能导致电压崩溃的事件，这暗示着系统的偶然性。线路中断引起的应变问题已被认为是导致电力系统电压不稳定的主要原因之一。本研究提出了一种基于电力系统电压稳定条件的应急排序新技术。制定了新的线路稳定性指标，并将其用于识别系统中的关键线路中断和敏感线路。为了确定负荷增加对关键线路中断的影响，对几种负载情况进行了线路中断偶发性排名。还对从应急排序和电压稳定性分析获得的结果进行了相关研究，发现弱线的线路中断会导致系统出现电压不稳定状况。随后，使用意外事件排名的结果，可以确定系统中的薄弱区域。提出的应急排序技术在IEEE可靠性测试系统上进行了测试。

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