Fast method to determine an area of vulnerability for stochastic prediction of voltage sags
Fast method to determine an area of vulnerability for stochastic prediction of voltage sags
复制标题
确定电压暂降随机预测脆弱区域的快速方法
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
G. Jang
中科院分区：
文献类型：
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作者：
Chang;G. Jang
一种快速方法确定网状网络中敏感负载的易受攻击区。敏感负荷的脆弱区域对于估计公用事业系统电压跌落的预期数量至关重要。通常，通过在线路和公交车上的许多不同点执行短路分析来确定易受攻击的区域。这种方法对于识别大型网状网络中的易受攻击区域是低效的。利用阻抗矩阵构建算法，推导出了线路故障引起的电压暂降幅值和相角跳跃的两个方程。利用推导出的电压暂降幅值方程，可以在不进行短路分析的情况下确定脆弱区域。文中还描述了一种快速有效的识别脆弱性区域的数值方法。所开发的方法被用于确定IEEE 30节点测试系统中三个敏感负荷的易损区。
A fast method determines the areas of vulnerability for sensitive loads in a mesh network. The area of vulnerability for a sensitive load is essential for the estimation of the expected number of voltage sags from the utility system. In general, an area of vulnerability is determined by performing a short-circuit analysis at many different points on lines and buses. Such a method is inefficient for identifying the area of vulnerability in a large mesh network. Two equations of the voltage-sag magnitudes and phase-angle jumps due to faults along a line are derived by using the impedance matrix building algorithm. By using the derived equation of voltage-sag magnitude, the area of vulnerability can be determined without performing short-circuit analysis. A fast and efficient numerical method to identify the area of vulnerability is also described. The method developed was used to determine the areas of vulnerability for three sensitive loads in the IEEE 30-bus test system.