| 引用本文: | 慕宗江,徐 岩,仇向东,张泰铭.基于潮流熵的继电保护定值在线校核评估方法[J].电力自动化设备,2014,34(2): |
| MU Zongjiang,XU Yan,QIU Xiangdong,ZHANG Taiming.Online protection setting assessment based on power flow entropy[J].Electric Power Automation Equipment,2014,34(2): |
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| 摘要: |
| 为了提高继电保护整定值在线校核的效率，提出按照各支路的重要度对继电保护整定值进行有序校验。部分支路受潮流冲击后易故障，且断开后易引起连锁故障，所以提出利用潮流熵评估支路重要度。利用基于潮流转移熵的指标Q1i评价了支路因故障断开后引发连锁故障的可能性，利用基于潮流分布熵的指标Q2i评价了支路抵抗潮流冲击的能力。采用Q1i、Q2i的乘积对支路重要度进行综合评价。利用IEEE 3机9节点系统上的仿真算例验证了所提方法的正确性。最后为了简化计算过程，提出采用分布系数法计算各支路的潮流变化。 |
| 关键词: 电力系统 继电保护 整定值 熵 分布熵 转移熵 |
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| Online protection setting assessment based on power flow entropy |
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MU Zongjiang1, XU Yan1, QIU Xiangdong2, ZHANG Taiming3
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1.North China Electric Power University，Baoding 071003，China;2.Join Bright Digital Power Technology Co.，Ltd.，Beijing 100096，China;3.Shijiazhuang Electric Power Company，Shijiazhuang 050000，China
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| Abstract: |
| It is proposed to sequentially assess the protection settings according to the importance of branches for improving the efficiency of its online setting assessment. As the branches vulnerable to power flow impact may easily cause fault and induces cascading faults after trip-off，the power flow entropy is thus applied to assess the importance of branch. The possibility of cascading faults induced by the trip-off of faulty branch is assessed by the index Q1i based on the power flow transfer entropy and the vulnerability of branch to power flow impact is assessed by the index Q2i based on the power flow distribution entropy. The product of Q1i and Q2i is thus applied to assess the importance of branch. The simulation for IEEE 3-generator 9-bus system verifies the correctness of the proposed method. The distribution factor method is recommended to simplify the calculation of branch power flow variation. |
| Key words: electric power systems relay protection setting entropy distribution entropy transfer entropy |
