中文摘要：

电力系统自组织临界性的研究尚处于初级阶段，其概念并不十分清晰，需要进一步研究，其还没有公认的可以作为研究电力系统自组织临界性的标准模型出现。针对这种情况，首先重新对比了沙堆模型与电力系统，对电力系统的自组织临界现象给出了新的分析和解释；建立了一个用于仿真电力系统自组织临界性的模型；最后利用这个模型对我国的一个实际电网进行了仿真计算，得到了表征电力系统自组织临界性的幂律特性曲线，同时分析了决定电网自组织临界性的参数。

英文摘要：

Self-organized criticality is one of the most important theories used to explain the power law relationship between blackout size and blackout probability in power systems. The study on power system self-organized criticality is still in its primary stage and the conception of power system self-organized criticality is not remarkably clear, thus further study on this problem is necessary. Meanwhile, there is not a generally accepted simulation model that can be used as the standard model for the research of power system self-organized criticality. In view of this situation, in this paper the authors compare the sand pile model with power system at first to give a novel analysis and explanation of this problem; then a model to simulate power system self-organized criticality is proposed; finally the simulation of a certain actual power network in China is conducted by the proposed model and the power law that characterizes power system self-organized criticality is obtained, at the same time the parameters to determine power system self-organized criticality are analyzed.