非正弦周期性负荷扰动引发强迫振荡机理分析
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摘要
电网强迫振荡问题日益突出,负荷侧引起强迫振荡的研究还不够深入。完善了非正弦持续周期性负荷扰动引发电网强迫功率振荡机理的理论推导,对比了冲击性负荷扰动与正弦波负荷扰动引发系统强迫振荡的区别,并分析了影响强迫振荡幅值的主要因素。在现有的负荷侧强迫功率振荡机理的基础上,将冲击性负荷傅里叶分解为若干正弦波的叠加,通过模态法对单机无穷大系统和多机系统分别进行了分析,得出冲击性负荷引发的强迫振荡幅值比正弦扰动负荷更大的结论,并通过单机无穷大系统和IEEE 9节点系统算例进行仿真验证。
The problem of power grid forced oscillation is becoming more and more serious,while the research on forced oscillation caused by load-side is not deep enough. The theoretical derivation of the forced power oscillation mechanism caused by the non-sinusoidal continuous periodic load disturbance is improved,the differences of forced oscillations caused by the impulsive load disturbance and the sinusoidal load disturbance are compared,and the main influencing factors on the amplitude of forced oscillation are analyzed. Based on the existing load-side forced oscillation mechanism,the impulsive load is decomposed into the superposition of several sine waves by Fourier decomposition,and the modal method is used to analyze the single-machine infinite-bus system and the multi-machine system respectively,obtaining the conclusion that the amplitude of forced oscillation caused by the impulsive load disturbance is larger than that of the sinusoidal load disturbance,which is verified by the simulations of single-machine infinite-bus system and IEEE 9-bus system.
The problem of power grid forced oscillation is becoming more and more serious,while the research on forced oscillation caused by load-side is not deep enough. The theoretical derivation of the forced power oscillation mechanism caused by the non-sinusoidal continuous periodic load disturbance is improved,the differences of forced oscillations caused by the impulsive load disturbance and the sinusoidal load disturbance are compared,and the main influencing factors on the amplitude of forced oscillation are analyzed. Based on the existing load-side forced oscillation mechanism,the impulsive load is decomposed into the superposition of several sine waves by Fourier decomposition,and the modal method is used to analyze the single-machine infinite-bus system and the multi-machine system respectively,obtaining the conclusion that the amplitude of forced oscillation caused by the impulsive load disturbance is larger than that of the sinusoidal load disturbance,which is verified by the simulations of single-machine infinite-bus system and IEEE 9-bus system.
引文
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[16]李志强,韩志勇,安宁,等.体现轧机功率需求主动性的周期性冲击负荷模型[J].电网技术,2011,35(12):72-76.LI Zhiqiang,HAN Zhiyong,AN Ning,et al.A periodic shock load model incarnating power demand initiative of rolling mill[J].Power System Technology,2011,35(12):72-76.
[17]彭卉,邹舒,付永生,等.冲击负荷接入电网的电能质量分析与治理方案研究[J].电力系统保护与控制,2014,42(1):54-61.PENG Hui,ZOU Shu,FU Yongsheng,et al.Research of the power quality problem and treatment scheme for impact loads connected into Chongqing power system[J].Power System Protection and Control,2014,42(1):54-61.
[18]KUNDUR P.Power system stability and control[M].New York,USA:Mc Graw-Hill Inc,1994:732-733.
[2]VOURNAS C D,KRASSAS N,PAPADIAS B C.Analysis of forced oscillations in a multimachine power system[C]∥International Conference on Control.Edinburgh,UK:IET,1991:443-448.
[3]汤涌.电力系统强迫功率振荡分析[J].电网技术,1995,19(12):6-10.TANG Yong.The analysis of forced power oscillation in power system[J].Power System Technology,1995,19(12):6-10.
[4]汤涌.电力系统强迫功率振荡的基础理论[J].电网技术,2006,30(10):29-33.TANG Yong.Fundamental theory of forced power oscillation in power system[J].Power System Technology,2006,30(10):29-33.
[5]顾丽鸿,周孝信,陶洪铸,等.局部弱联诱发互联电网强迫振荡机制分析[J].电网技术,2010,34(12):36-43.GU Lihong,ZHOU Xiaoxin,TAO Hongzhu,et al.Analysis on mechanism of inter-area forced oscillation caused by local weak interconnection in interconnected power grid[J].Power System Technology,2010,34(12):36-43.
[6]鞠平,刘咏飞,王红印,等.电力系统的广义强迫振荡[J].电力自动化设备,2014,34(5):1-6.JU Ping,LIU Yongfei,WANG Hongyin,et al.General forced oscillations of power systems[J].Electric Power Automation Equipment,2014,34(5):1-6.
[7]陈磊,闵勇,胡伟.基于振荡能量的低频振荡分析与振荡源定位(一)理论基础与能量流计算[J].电力系统自动化,2012,36(3):22-27,86.CHEN Lei,MIN Yong,HU Wei.Low frequency oscillation analysis and oscillation source location based on oscillation energy part one mathematical foundation and energy flow computation[J].Automation of Electric Power Systems,2012,36(3):22-27,86.
[8]褚晓杰,印永华,高磊,等.基于经验模态理论的强迫振荡扰动源定位新方法[J].中国电机工程学报,2014,34(28):4906-4912.CHU Xiaojie,YIN Yonghua,GAO Lei,et al.A new forced oscillation disturbance source location method based on empirical mode theory[J].Proceedings of the CSEE,2014,34(28):4906-4912.
[9]朱振山,刘涤尘,廖清芬,等.基于最小均方时延估计法的强迫功率振荡扰动源定位方法[J].电力系统自动化,2015,39(4):58-62.ZHU Zhenshan,LIU Dichen,LIAO Qingfen,et al.Disturbance source location of forced power oscillation based on LMS time delay estimation method[J].Automation of Electric Power Systems,2015,39(4):58-62.
[10]NESS J E V.Response of large power systems to cyclic load variations[J].IEEE Transactions on Power Apparatus and Systems,1966,PAS-85(7):723-727.
[11]韩志勇,贺仁睦,马进,等.电力系统强迫功率振荡扰动源的对比分析[J].电力系统自动化,2009,33(3):16-19.HAN Zhiyong,HE Renmu,MA Jin,et al.Comparative analysis of disturbance source inducing power system forced power oscillation[J].Automation of Electric Power Systems,2009,33(3):16-19.
[12]余一平,闵勇,陈磊,等.周期性负荷扰动引发强迫功率振荡分析[J].电力系统自动化,2010,34(6):7-11.YU Yiping,MIN Yong,CHEN Lei,et al.Analysis of forced power oscillation caused by continuous cyclical load disturbances[J].Automation of Electric Power Systems,2010,34(6):7-11.
[13]余一平,闵勇,陈磊,等.多机电力系统强迫功率振荡稳态响应特性分析[J].电力系统自动化,2009,33(22):5-9.YU Yiping,MIN Yong,CHEN Lei,et al.Analysis of forced power oscillation steady-state response properties in multi-machine power systems[J].Automation of Electric Power Systems,2009,33(22):5-9.
[14]SARMADI S A N,VENKATASUBRAMANIAN V.Inter-area resonance in power system from forced oscillation[J].IEEE Transactions Power Systems,2016,31(1):378-386.
[15]高超.大容量冲击性负荷对地区电网暂态稳定性影响的研究[D].上海:上海交通大学,2008.GAO Chao.Influence of high-capacity impact loads on transient stability of regional power system[D].Shanghai:Shanghai Jiao Tong University,2008.
[16]李志强,韩志勇,安宁,等.体现轧机功率需求主动性的周期性冲击负荷模型[J].电网技术,2011,35(12):72-76.LI Zhiqiang,HAN Zhiyong,AN Ning,et al.A periodic shock load model incarnating power demand initiative of rolling mill[J].Power System Technology,2011,35(12):72-76.
[17]彭卉,邹舒,付永生,等.冲击负荷接入电网的电能质量分析与治理方案研究[J].电力系统保护与控制,2014,42(1):54-61.PENG Hui,ZOU Shu,FU Yongsheng,et al.Research of the power quality problem and treatment scheme for impact loads connected into Chongqing power system[J].Power System Protection and Control,2014,42(1):54-61.
[18]KUNDUR P.Power system stability and control[M].New York,USA:Mc Graw-Hill Inc,1994:732-733.