基于加权潮流冲击熵的电网节点抗干扰能力分析  

Analysis of Node Anti-jamming Capability Based on the Weighted Power Shock Entropy in Power System

作　　者：徐岩[1] 郅静 

机构地区：[1]华北电力大学新能源电力系统国家重点实验室,河北保定071003

出　　处：《华北电力大学学报（自然科学版）》2016年第4期34-41,共8页Journal of North China Electric Power University：Natural Science Edition

基　　金：国家自然科学基金资助项目(50777016);中央高校基本科研业务费专项资金项目(12MS110)

摘　　要：为提高电力系统运行安全水平,提出一种基于加权潮流冲击熵的电网节点抗干扰能力分析方法。当系统断线故障和负荷水平提高时,分别利用直流潮流法和功率灵敏度矩阵估算节点所连线路的潮流增量及负载率,结合该节点度数计算其加权潮流冲击熵,进而得到其受冲击指标,反映节点对系统断线故障及负荷水平提高的抗干扰能力。直流潮流法和功率灵敏度矩阵可通过简单的数学运算准确估算系统断线故障和负荷水平提高时各线路的潮流情况,计算量少,适用性好。加权潮流冲击熵反映了节点所连线路负载率偏高甚至过载时的危险性以及不同节点度数分散节点所受冲击时的差异。受冲击指标综合考虑系统断线故障和负荷水平提高对节点的冲击影响,判断节点的抗干扰能力。在IEEE39节点系统中对该方法的正确性和优越性进行了验证。To improve the operation safety level of power system,an analysis method of node anti-jamming capability based on the weighted power shock entropy in power system is put forward. When line disconnection and improved load level happens,the direct current power flow method and power sensitivity matrix are respectively used to estimate the power increment and load rate of lines connected with the node. Combined with the node degree,the weighted power shock entropy and the impact index are calculated to reflect the impact of line disconnection and improved load level.The direct current power flow method and power sensitivity matrix can accurately estimate the line power with line disconnection and improved load level by simple mathematical operations. The calculation amount is little and the applicability is good. The weighted power shock entropy can reflect the risk of the high load rate even overload,as well as the different shock dispersion capacity by different node degree. The impact index of node is defined to reflect the node anti-jamming capability. The method considers the shock impact on the node caused by line disconnection disturbance and improved load level comprehensively. The correctness and superiority of the proposed method are verified in IEEE39 bus system.

关 键 词：电力系统 节点抗干扰能力 加权潮流冲击熵 直流潮流法 功率灵敏度 

分 类 号：TM711[电气工程—电力系统及自动化]