电网组织结构对其自组织临界性的影响  

The influences of power grid structure on self-organized criticality

作　　者：梁才[1] 刘文颖[1] 温志伟[2] 平德明[2] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206 [2]甘肃电力科学研究院,甘肃兰州730000

出　　处：《电力系统保护与控制》2010年第20期6-11,共6页Power System Protection and Control

基　　金：甘肃省自然科学研究基金资助项目(0803RJZA028)~~

摘　　要：提出电力系统在运行工况下的自组织临界状态与电网结构的均匀程度有关,并用网络拓扑熵来表征电网结构的均匀程度,建立了自组织临界性仿真模型。通过对IEEE39节点系统结构改变前后的仿真验证发现:在相同的负荷水平和线路潮流分布下,电网结构越均匀的系统发生大规模连锁故障的概率比不均匀系统明显减低,通过平衡电网的均匀程度能够有效降低系统进入自组织临界状态的风险。An original view is put forward that,under specific running state,power system self-organized criticality is related to power grid＇s uniform degree.The uniform degree of power network is characterized by network entropy;then a model to simulate power system self-organized criticality is proposed.Simulations in an IEEE39-bus system with the proposed model show that,under the uniform loading and flow distribution,the higher the grid＇s uniform degree is,the lower the probability of power cascading failure will be.Furthermore,balancing power grid＇s uniform degree can effectively prevent large-scale disastrous blackout and reduce the risk of entering power self-organized criticality state.

关 键 词：电网组织结构 自组织临界性 网络拓扑熵 连锁故障 停电分布 

分 类 号：TM711[电气工程—电力系统及自动化]