初值优化的电力系统戴维南等值跟踪算法研究

doi:10.11930/j.issn.1004-9649.2013.9.102.4

摘要/Abstract

摘要： 在电力系统分析计算时,需要对电网进行等值处理。戴维南等值是常用的等值手段,它能够反应系统运行状况并且具有模型清晰、简单快速的特点。针对现有方法求取戴维南等值参数时,存在参数漂移和参数跟踪问题,提出基于初值优化的偏差校正跟踪算法,利用相邻运行点的戴维南等值电压幅值不变、相角变化,进而获取等值跟踪初值,采用偏差校正方式进行跟踪电网运行点的变化。初值优化算法与偏差校正方法相结合能够快速跟踪等值参数,又能够避免参数数值计算不稳定。通过跟踪性能测试和四机两区域系统仿真算例,证明了所提算法的可靠性、准确性与有效性,能够快速跟踪实际电网运行方式。

关键词: 电力系统, 戴维南等值, 偏差修正, 初值优化, 遗传算法

Abstract: As interconnected power systems expand, the Thevenin equivalent is widely used in power system, which can reflect the operating conditions of system because of its clear, simple and rapid characteristics. Based on the parameter drift and tracking problems in obtaining the Thevenin equivalent parameter with existing method, an improved deviation correction algorithm is proposed in this paper to track the Thevenin equivalent parameter. The algorithm computes the initial value of parameter in case of constant Thevenin equivalent voltage amplitude and varied phase angle of the adjacent operating point. The deviation correcting mode is used to track the changing operation point of power gird. The combination of initial value optimization algorithm and deviation correction method can not only rapidly track equivalent parameters, but also avoid the numerical instability. At last, the tracking performance testing and four-machine two-area system simulation have proved the accuracy and applicability of the proposed algorithm for actual grid operation mode.

Key words: power system, Thevenin equivalent, deviation correction, initial value optimization, genetic algorithm

中图分类号:

TM712

丁蓝, 王先洪, 欧智乐, 曾博. 初值优化的电力系统戴维南等值跟踪算法研究[J]. 中国电力, 2013, 46(9): 102-106.

DING Lan, WANG Xian-hong, OU Zhi-le, ZENG Bo. An Initial Value Optimization Algorithm to Track Thevenin Equivalent Parameter[J]. Electric Power, 2013, 46(9): 102-106.

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链接本文: https://www.electricpower.com.cn/CN/10.11930/j.issn.1004-9649.2013.9.102.4

https://www.electricpower.com.cn/CN/Y2013/V46/I9/102

参考文献

[1] 周念成,廖彦洁,颜伟,等. 基于相量测量的电压稳定裕度计算及减载方案[J] .中国电力,2012,45(5)：6-10.
ZHOU Nian-cheng, LIAO Yan-jie, YAN Wei, et al . Voltage stability margin computation and under-voltage load shedding scheme based on phasor measurement[J]. Electric Power, 2012, 45(5): 6-10.
[2] 庞晓艳,周剑,颜伟,等. 基于最小二乘外网等效的线路电压稳定性指标[J]. 中国电力,2011,44（4）：21-25.
PANG Xiao-yan, ZHOU Jian, YAN Wei, et al . A new line voltage stability index based on least squares external network equivalence [J]. Electric Power, 2011, 44(4): 21-25.
[3] OHTSUKA K, YOKOKAWA S, TANAKA H, et al . An equivalent of multi-machine power systems and its identification for on-line application to decentralized stabilizers[J]. IEEE Transactions on Power Systems, 1989, 4(2): 687-693.
[4] 廖国栋,王晓茹. 电力系统戴维南等值参数辨识的不确定模型[J]. 中国电机工程学报,2008,28（28）：74-79.
LIAO Guo-dong, WANG Xiao-ru. Uncertain models for identification of electric power system thevenin equivalent parameters [J]. Proceedings of the CSEE, 2008, 28(28): 74-79.
[5] VU K, BEGOBIC M M, NOVOSEL D, et al . Use of local measurements to estimate voltage-stability margin[J]. IEEE Transactions on Power Systems, 1999, 14(3): 1029-1035.
[6] 李来福,柳进,于继来,等.节点戴维南等值参数在线跟踪简捷算法[J]. 中国电机工程学报,2006,26（10）：40-44.
LI Lai-fu, LIU Jin, YU Ji-lai, et al . A simple and direct method of on-line tracking Thevenin equivalent[J]. Proceedings of the CSEE, 2006, 26(10): 40-44.
[7] 安天瑜,周苏荃. 一种电压薄弱负荷节点群的戴维南等值参数跟踪方法研究[J]. 继电器,2007,35（24）：21-25.
AN Tian-yu, ZHOU Su-quan. Research on a weak voltage node group’s Thevenin equivalents tracing method [J]. Relay, 2007, 35(24): 21-25.
[8] 罗华伟,吴政球,戴庆华,等. 电网戴维南等值参数的快速计算[J]. 中国电机工程学报,2009,29（1）：35-39.
LUO Hua-wei, WU Zheng-qiu, DAI Qing-hua, et al . Fast computation of Thevenin equivalent parameters [J]. Proceedings of the CSEE, 2009, 29(1): 35-39.
[9] 赵金利,余贻鑫,ZHANG P. 基于本地相量测量的电压失稳指标工作条件分析[J]. 电力系统自动化,2006,30（24）：1-4.
ZHAO Jin-li, YU Yi-xin, ZHANG P. Conditions of applying voltage instability predictor (VIP) based on local measurements[J]. Automation of Electric Power Systems, 2006, 30(24): 1-4.
[10] 闫常友,刘建飞,杨奇逊,等. 基于平方根滤波的网络等值算法[J]. 继电器,2006,34（3）：41-46.
YAN Chang-you, LIU Jian-fei, YANG Qi-xun, et al . Research on real-time equivalent based on square-root algorithm[J]. Relay,2006, 34(3): 41-46.
[11] FUSCO G, LOSI A, RUSSO M. Constrained least squares methods for parameter tracking of power system steady-state equivalent circuits[J]. IEEE Transactions on Power Delivery,2000, 15(3): 1073-1080.
[12] 王漪,柳焯.基于戴维南等值的系统参数跟踪估计[J].电网技术, 2000,24（11）：28-30.
WANG Yi, LIU Zhuo. Tracking and estimation of system [J]. Power System Technology, 2000, 24(11): 28-30.
[13] 王芝茗,王漪,徐敬友,等. 关键负荷节点集合电网侧戴维南参数预估[J]. 中国电机工程学报,2002,22（2）：16-20.
WANG Zhi-min, WANG Yi, XU Jing-you, et al . Prediction of Thevenin’s equivalent parameters on electrical power network side for the muster of key load nodes[J]. Proceedings of the CSEE, 2002, 22(2): 16-20.
[14] 李娟,刘修宽,曹国臣,等. 一种面向节点的电网等值参数跟踪估计方法的研究[J]. 中国电机工程学报,2003,23（3）：30-33.
LI Juan, LIU Xiu-kuan, CAO Guo-chen, et al . A tracking estimation method for network equivalent parameters of facing the node [J]. Proceedings of the CSEE, 2003, 23(3): 30-33.
[15] CORSI S, GLAUCO N. A real-time voltage instability identification algorithm based on local phasor measurements[J]. IEEE Transactions on Power Systems, 2008, 23(3): 1271-1279.
[16] CORSI S. Wide area voltage protection[J]. IET Gener. Transm. Distrib., 2010, 4(10): 1164-1179.
[17] 牟善科,丁涛,顾伟,等. 基于偏差校正的戴维南等值参数在线跟踪改进算法[J]. 电力系统保护与控制,2011,39（2）：23-28.
MOU Shan-ke, DING Tao, GU Wei, et al . An improved algorithm for on-line tracking Thevenin equivalent parameters base d on deviation correction[J]. Power System Protection and Control,2011, 39(2): 23-28.
[18] AREFIFAR SA, XUW. Online tracking of power system impedance parameters and field experiences [J]. IEEE Transactions on Power Delivery, 2009, 24(4): 1781-1788.
[19] 刘明松,张伯明,姚良忠,等. 基于PMU和改进戴维南等值模型的电压稳定在线监视[J]. 电力系统自动化,2009,33（10）：6-10.
LIU Ming-song, ZHANG Bo-ming, YAO Liang-zhong, et al . On- line voltage stability monitoring based on PMU and improved Thevenin equivalent model[J]. Automation of Electric Power Systems, 2009, 33(10): 6-10.
[20] 胡济洲,李胜洪,奚江惠,等. 基于内点法和遗传算法无功优化的比较及应用[J]. 中国电力,2002,35（12）：30-33.
HU Ji-zhou, LI Sheng-hong, XI Jiang-hui, et al . Comparison and application of interior point and genetic algorithm based on reactive power optimization[J]. Electric Power, 2002, 35(12): 30-33.
[21] 贺春,周胜军,冯满盈. 基于遗传算法的高次谐波治理[J]. 中国电力,2011,44（2）：14-17.
HE Chun, ZHOU Sheng-jun, FENG Man-ying. High order harmonic suppression based on genectic algorithm[J]. Electric Power, 2011, 44(2): 14-17.