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Simple and efficient method for steady-state voltage stability assessment of radial distribution systems

机译：简单有效的径向分布系统稳态电压稳定性评估方法

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摘要

A new static voltage stability index of a radial distribution system is proposed to faithfully evaluate the severity of the loading situation, thereby predicting for voltage instability at definite load value. The proposed index includes different parameters which affect the steady-state voltage stability of distribution systems, therefore it gives accurate results. The maximum value of 1 of that index denotes the point where the system reaches the point of collapse whereas a minimum value of 0 shows the state of no load. The performance of the new index was tested on two radial distribution systems consisting of 33 and 85 buses. Comparison between the results of the new index and those of previous indices showed that the new index yielded reliable results in predicting voltage stability condition of the system. The new index overcomes the problem which faces many previous indices especially as the load approaches the critical point. Analysis of the two-bus equivalents of the test systems under different scenarios is also presented. A new P-Q plane of stability is introduced based on the equation of the proposed index. The active, reactive and apparent power margins are then directly determined from the voltage stability boundary.
机译：提出了一种新的径向配电系统静态电压稳定性指标，以忠实地评估负载情况的严重性，从而预测在确定负载值下的电压不稳定性。所提出的指标包括影响配电系统稳态电压稳定性的不同参数，因此给出了准确的结果。该索引的最大值1表示系统到达崩溃点的点，而最小值0表示空载状态。新索引的性能在由33和85辆公交车组成的两个径向分配系统上进行了测试。新指标与以前指标的结果比较表明，新指标在预测系统电压稳定状态方面取得了可靠的结果。新指标克服了许多以前的指标所面临的问题，尤其是当负载接近临界点时。还介绍了在不同情况下测试系统的两母线等效分析。根据提出的指标方程，引入了新的P-Q稳定性平面。然后根据电压稳定性边界直接确定有功，无功和视在功率裕度。

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