基于EEAC的动态等值模型可信度评估方法  

An EEAC-Based Credibility Evaluation Method of Dynamic Equivalent Model

作　　者：孔祥波[1] 李威[2] 周海强[1] 

机构地区：[1]河海大学能源与电气学院,南京市211100 [2]南瑞集团公司(国网电力科学研究院),南京市211106

出　　处：《电力建设》2014年第5期1-5,共5页Electric Power Construction

基　　金：国家自然科学基金项目(50977021)

摘　　要：提出了基于扩展等面积准则(extended equal area criterion,EEAC)的动态等值模型可信度评估方法。首先,简要介绍了动态等值的基本原理及方法,讨论了动态等值模型的有效性问题;接着。应用基于EEAC的稳定分析量化理论。对不同故障下等值前、后系统的功角稳定裕度、临界切除时间等稳定量化指标进行对比,定义了等值系统的可信度指标。最后,以IEEE 10机39节点系统及福建电网为例,应用Fastest软件对采用不同等值模型算例系统的稳定量化指标进行了计算,在此基础上计算了其可信度指标。仿真算例结果表明,基于动态相似度及缓冲区的动态等值模型能更好地保持原系统动态特性,暂态稳定分析结果的可信度更高。This paper presented an EEAC-based（extended equal area criterion） credibility evaluation method of dynamic equivalent model.Firstly,the basic principles and methods of dynamic equivalent were introduced,and the effectiveness of dynamic equivalent model was discussed.Then,the power-angle stability margin and critical clearing time of prototype system and equivalent system were compared under different faults by using the quantitative theory of stability analysis based on EEAC,and the credibility index of equivalent system was defined.Finally,the stability quantitative index for test systems in different equivalent models was calculated in the IEEE 10-machine and 39-bus system and Fujian Power Grid by software Fastest.The simulation results show that the dynamic equivalent model based on dynamic similarity and buffer zone can better keep dynamic characteristic of the original system,and the transient stability analysis has better credibility.

关 键 词：动态等值模型 扩展等面积准则 临界切除时间 稳定裕度 

分 类 号：TM711[电气工程—电力系统及自动化]