| 引用本文: | 常学飞,田立军,秦英林.一种精确确定电压暂降凹陷域的算法[J].电力自动化设备,2011,31(4): |
| CHANG Xuefei,TIAN Lijun,QIN Yinglin.Method to accurately determine vulnerable areas of voltage sag[J].Electric Power Automation Equipment,2011,31(4): |
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| 摘要: |
| 提出一种基于节点阻抗矩阵确定电压暂降凹陷域的算法，根据电压暂降幅值与传输线故障距离的解析关系式，计算得到各种短路故障情况下各电压限值对应的临界故障点。对任意给定网络参数的电力系统，可确定各种短路故障情况下不同电压限值对应的电压暂降凹陷域。并在此基础上考虑电压暂降持续时间、相位跳变等因素，对电压暂降凹陷域进行修正，从而更加精确地确定凹陷域。利用该算法对IEEE 39节点标准测试系统进行凹陷域分析,并与传统故障点法得到的结果进行比较，验证了算法的精确性和实用性。 |
| 关键词: 短路故障 电压暂降 凹陷域 凹陷域修正 |
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| 基金项目:山东省自然科学基金资助项目（Y2008F37） |
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| Method to accurately determine vulnerable areas of voltage sag |
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CHANG Xuefei, TIAN Lijun, QIN Yinglin
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School of Electrical Engineering，Shandong University，Ji’nan 250061，China
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| Abstract: |
| A method based on the impedance matrix is proposed to determine the vulnerable areas of voltage sag. According to the relation between the magnitude of voltage sag and the distance of transmission line fault，the critical point corresponding to each voltage limitation is calculated for different short-circuit faults. The vulnerable areas of voltage sag corresponding to each voltage limitation are determined for different short-circuit faults of power system with arbitrary network parameters. With the consideration of the voltage sag duration and the phase-angle jump，the vulnerable areas of voltage sag are revised more accurately. The proposed method is applied to IEEE 39-bus test system and the resulted vulnerable areas are compared with those by the fault position method，which shows its accuracy and applicability. |
| Key words: short-circuit voltage sag vulnerable area vulnerable area revise |
