基于EEAC的动态等值模型可信度评估方法
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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.
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.
引文
[1]贾旭东,李庚银,赵成勇,等.电力系统仿真可信度评估方法的研究[J].中国电机工程学报,2010,30(19):51-57.
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[10]鞠平.电力系统建模理论与方法[M].北京:科技出版社,2010.
[11]周海强,鞠平,宋忠鹏,等.基于动态相似度与等值缓冲区的电动机动态等值方法[J].电力系统自动化,2010,34(13):24-27.
[12]胡杰,余贻鑫.电力系统动态等值参数聚合的实用方法[J].电网技术,2006,30(24):24-30.
[13]彭晨光,刘娜,王瑞闯.暂态稳定性事故筛选与排序方法[J].山东电力高等专科学校学报,2005,12(2):54-60.
[14]徐泰山,薛禹胜,李碧君,等.暂态稳定在线预警故障集的自适应筛选[J].电力系统自动化,2009,33(22):1-4.
[15]姚海成,周坚,黄志龙,等.一种工程实用的动态等值方法[J].电力系统自动化,2009,33(19):111-115.
[2]周海强,周晓成,鞠平,等.基于功率灵敏度的动态等值模型可信度量化评估方法[J].电力系统自动化,2012,36(8):6-10.
[3]周成,贺仁睦.电力系统仿真模型有效性的动态评估[J].电网技术,2010,34(3):61-64.
[4]薛禹胜.运动稳定性量化理论:非自治非线性多刚体系统的稳定性分析[M].南京:江苏科学技术出版社,1999.
[5]Xue Y.Van C T.Ribbens-Pavella M.A simple direct method for fast transient stability assessment of large power systems[J].IEEE Transactions on Power Systems,1988,3(2):400-412.
[6]倪以信,陈寿孙,张宝霖.动态电力系统的理论与分析[M].北京:清华大学出版社,2002.
[7]刘丽霞,罗敏,李晓辉,等.电力系统常用动态等值方法的比较与改进[J].电力系统及其自动化学报,2011,44(1):149-154.
[8]徐泰山,薛峰,许剑冰,等.基于EEAC的稳定性量化分析软件包[J].电力系统自动化,2001,25(22):55-58.
[9]郭金川,曾沅,高群.电力系统负荷聚合方法研究[J].电网与清洁能源,2009,25(3):12-15.
[10]鞠平.电力系统建模理论与方法[M].北京:科技出版社,2010.
[11]周海强,鞠平,宋忠鹏,等.基于动态相似度与等值缓冲区的电动机动态等值方法[J].电力系统自动化,2010,34(13):24-27.
[12]胡杰,余贻鑫.电力系统动态等值参数聚合的实用方法[J].电网技术,2006,30(24):24-30.
[13]彭晨光,刘娜,王瑞闯.暂态稳定性事故筛选与排序方法[J].山东电力高等专科学校学报,2005,12(2):54-60.
[14]徐泰山,薛禹胜,李碧君,等.暂态稳定在线预警故障集的自适应筛选[J].电力系统自动化,2009,33(22):1-4.
[15]姚海成,周坚,黄志龙,等.一种工程实用的动态等值方法[J].电力系统自动化,2009,33(19):111-115.