CAJ | 학술논문

针对目前电网自组织临界状态演化的研究主要集中于网架结构或运行状态单一因素的情况，总结了两者在决定电网自组织临界演化进程上的区别和联系，并结合实际电网运行状态和网架结构不断变化的特点，以及通讯网中流量和有效性能模型中网络效率的定义，提出节点流量的概念，充分体现和量化了节点在传输电能中发挥的作用；在此基础上，提出用节点流量进行加权的加权网络拓扑熵，不仅能反映节点在各节点度数区间的分布情况，还能定量判断各区间节点的重要程度，其能自动跟踪电网的运行状态和网架结构变化，动态反映电网的自组织临界演化趋势，物理背景更加符合电力系统实际。结合大停电风险评估指标对河西电网的自组织临界演化进行了仿真计算，仿真结果证明加权网络拓扑熵在表征电网自组织临界演化水平上的实时性和全面性。
침대목전전망자조직림계상태연화적연구주요집중우망가결구혹운행상태단일인소적정황，총결료량자재결정전망자조직림계연화진정상적구별화련계，병결합실제전망운행상태화망가결구불단변화적특점，이급통신망중류량화유효성능모형중망락효솔적정의，제출절점류량적개념，충분체현화양화료절점재전수전능중발휘적작용；재차기출상，제출용절점류량진행가권적가권망락탁복적，불부능반영절점재각절점도수구간적분포정황，환능정량판단각구간절점적중요정도，기능자동근종전망적운행상태화망가결구변화，동태반영전망적자조직림계연화추세，물리배경경가부합전력계통실제。결합대정전풍험평고지표대하서전망적자조직림계연화진행료방진계산，방진결과증명가권망락탁복적재표정전망자조직림계연화수평상적실시성화전면성。
The research on self-organized criticality was mainly on grid structure or operating state. The differences and relationships on self-organizing critical state between them were concluded in this paper. The nodal flow was first proposed on the basis of flow in communication network and network efficiency in effective-properties model, considering the continuously change of grid structure and operating state. The nodal flow could quantitatively reflect the function of node on power transmission. On the basis, the weighted network topology entropy weighted by nodal flow was proposed to represent the effect of node degree and degree distribution changes, thus representing the importance of node. Moreover, the weighted network could automatic track the change of grid structure and operating state and dynamic reflected the trend of evolution of grid’s self-organizing critical state. Its physical background was more in line with practical situation of power system. The process of self-organize criticality was verified by simulating Hexi power grid with the blackout risk assessment index (VaR). The weighted network topology entropy is proved to be real-time available and comprehensive in representing the level of grid’s self-organize criticality.