| 电网技术 2010, 34(1) 56-61 DOI: ISSN: 1000-3673 CN: 11-2410/TM | |||||||||||||||||||||||||||||||||||
| 本期目录 | 下期目录 | 过刊浏览 | 高级检索 [打印本页] [关闭] | |||||||||||||||||||||||||||||||||||
| 电力系统 |
| ||||||||||||||||||||||||||||||||||
| 基于Karush-Kuhn-Tucker最优条件的电网可疑参数辨识与估计 | |||||||||||||||||||||||||||||||||||
| 曾兵,吴文传,张伯明 | |||||||||||||||||||||||||||||||||||
| 电力系统及发电设备控制和仿真国家重点实验室(清华大学电机工程与应用电子技术系), 北京市 海淀区 100084 | |||||||||||||||||||||||||||||||||||
| 摘要:
电网元件参数的误差会导致能量管理系统的状态估计结果不准确,从而影响其他应用结果的可靠性和精确性,因此状态估计程序应当具有辨识和估计元件参数的功能。首先基于拉格朗日乘子的可疑支路辨识法,提出了一种迭代辨识算法,用于生成待修正的支路参数集;然后研究了基于参数–目标函数灵敏度的参数估计方法,该方法针对选出的可疑支路,计算出可疑支路参数对状态估计目标函数的灵敏度;最后利用变步长逐次逼近法估计可疑支路参数,该方法避免了传统方法的数值稳定性问题,具有很高的实用价值。IEEE 14和IEEE 30标准算例系统验证了所提出方法的正确性。 | |||||||||||||||||||||||||||||||||||
| 关键词: | |||||||||||||||||||||||||||||||||||
| A Method to Identify and Estimate Network Parameter Errors Based on Karush-Kuhn-Tucker Condition | |||||||||||||||||||||||||||||||||||
| ZENG Bing ,WU Wen-chuan ,ZHANG Bo-ming | |||||||||||||||||||||||||||||||||||
| State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment (Department of Electrical Engineering, Tsinghua University), Haidian District, Beijing 100084, China | |||||||||||||||||||||||||||||||||||
| Abstract:
Network parameter errors may strongly deteriorate the accuracy of state estimation results and affect both reliability and accuracy of other applications, thus state estimation program should possess the function to recognize and estimate element parameters. In this paper, firstly, based on Lagrangian algorithm an iterative method to identify incorrect parameters is proposed to generate branch parameter set to be modified; then a parameter estimation method based on the sensitivity of parameter to objective function, which represents how the parameters affect the quality of the state estimation solution, is researched, and for the chosen distrustful branch this method calculate the sensitivity of parameters of distrustful branch to objective function of state estimation; finally, the variable step-size successive approximation method is used to estimate the parameters of distrustful branch. This method eschews the numerical stability in traditional methods, so it is practicable. The results of IEEE 14-bus system and IEEE 30-bus systems show that the proposed method is corrective. | |||||||||||||||||||||||||||||||||||
| Keywords: | |||||||||||||||||||||||||||||||||||
| 收稿日期 2009-10-09 修回日期 2009-12-15 网络版发布日期 2010-02-02 | |||||||||||||||||||||||||||||||||||
| DOI: | |||||||||||||||||||||||||||||||||||
| 基金项目:
国家自然科学基金资助项目(50707013);国家电网公司科技项目。 | |||||||||||||||||||||||||||||||||||
| 通讯作者: 曾兵 | |||||||||||||||||||||||||||||||||||
| 作者简介: 曾兵(1985—),女,硕士研究生,研究方向为电力系统状态估计,E-mail:cengb07@mails.tsinghua. edu.cn; 吴文传(1973—),男,副教授,博士,主要从事调度中心自动化系统的研究和教学工作,E-mail:wuwench@tsinghua.edu.cn; 张伯明(1948—),男,教授,博士生导师,CSEE和IEEE高级会员,主要从事电力系统分析、控制中心计算机应用的教学研究工作,E-mail:zhangbm@tsinghua.edu.cn。 | |||||||||||||||||||||||||||||||||||
| 作者Email: cengb07@mails.tsinghua.edu.cn | |||||||||||||||||||||||||||||||||||
|
| |||||||||||||||||||||||||||||||||||
| 参考文献: | |||||||||||||||||||||||||||||||||||
| [1] Schweppe F C,Wildes L J.Power system static state estimation,part I:exact model[J].IEEE Trans on Power Apparatus and Systems,PAS-89(1):120-125. [2] 李碧君,薛禹胜,顾锦汶,等.电力系统状态估计问题的研究现状和展望[J].电力系统自动化,1998,22(11):53-60. Li Bijun,Xue Yusheng,Gu Jinwen,et al.Status quo and prospect of power system state estimation[J].Automation of Electric Power Systems,1998,22(11):53-60(in Chinese). [3] 胡学浩.智能电网:未来电网的发展态势[J].电网技术,2009,33(14):1-5. Hu Xuehao.Smart grid:A development trend of future power grid[J].Power System Technology,2009,33(14):1-5(in Chinese). [4] 林宇峰,钟金,吴复立.智能电网技术体系探讨[J].电网技术,2009,33(12):8-14. Lin Yufeng,Zhong Jin,Wu Felix.Discussion on smart grid supporting technologies[J].Power System Technology,2009,33(12):8-14(in Chinese). [5] 陈树勇,宋书芳,李兰欣,等.智能电网技术综述[J].电网技术,2009,33(8):1-7. Chen Shuyong,Song Shufang,Li Lanxin,et al.Survey on smart grid technology[J].Power System Technology,2009,33(8):1-7 (in Chinese). [6] 王凤萍.对能量管理系统建设的几点建议[J].电网技术,2000, 24(2):77-79. Wang Fengping.Some suggestion on construction of energy management system[J].Power System Technology,2000,24(2):77-79(in Chinese). [7] 杨滢.拓扑错误辨识与参数估计的理论分析和算法研究[D].北京:清华大学,2005. [8] Zhu J.A identification of network parameter errors[J].IEEE Trans on Power Systems,2006,21(2):586-592. [9] Cutsem T,Quintana V.Network parameter estimation using online data with application to transformer tap position estimation[J].IEE Proceedings-Generation Transmission and Distribution,1988,135(1):31-40. [10] Handschin E,Kliokys E.Transformer tap position estimation and bad data detection using dynamic signal modeling[J].IEEE Trans on Power Systems,1995,10(2):810-817. [11] 王兴,刘广一,于尔铿.基于变比变化检测的变压器抽头位置跟踪估计算法[J].中国电机工程学报,1997,17(3):162-165. Wang Xing,Liu Guangyi,Yu Erkeng.Transformer tap position tracing estimation based on turn ratio changing detection[J].Proceedings of the CSEE,1997,17(3):162-165(in Chinese). [12] 于尔铿.电力系统状态估计[M].北京:水利电力出版社,1985:189-207. [13] Liu W H E,Wu F F,Liu S M.Estimations of parameter errors form measurement residuals in state estimation[J].IEEE Trans on Power Systems,1992,7(1):81-89. [14] 杨滢,孙宏斌,张伯明,等.集成于EMS中的参数估计软件的开发与应用[J].电网技术,2006,30(4):43-49. Yang Ying,Sun Hongbin,Zhang Boming,et al.Development and application of parameter estimation software integrated into EMS[J].Power System Technology,2006,30(4):43-49(in Chinese). [15] 宁辽逸,孙宏斌,吴文传,等.基于状态估计的电网支路参数估计方法[J].中国电机工程学报,2009,29(1):7-12. Ning Liaoyi,Sun Hongbin,Wu Wenchuan,et al.State estimation based branch parameter estimation method for power grid[J].Proceedings of the CSEE,2009,29(1):7-12(in Chinese). [16] 张伯明,陈寿孙,严正.高等电力网络分析[M].北京:清华大学出版社,2007:324-328. [17] Minguez R,Conejo A J.State estimation sensitivity analysis[J].IEEE Trans on Power Systems,2007,22(3):1080-1091. | |||||||||||||||||||||||||||||||||||
| 本刊中的类似文章 | |||||||||||||||||||||||||||||||||||
| Copyright by 电网技术 | |||||||||||||||||||||||||||||||||||