基于阻抗灵敏度的直驱风电场并网次同步振荡影响因素及参数调整分析
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摘要
近年来,我国新疆地区出现了直驱风电场并入交流电网的次同步振荡问题,目前,频域下的阻抗分析法是针对该问题的一种主要研究方法。引入频域灵敏度的概念,将阻抗分析法与灵敏度分析结合,在风电场和电网阻抗模型的基础上,通过计算系统阻抗对参数的阻抗灵敏度,直观反映参数变化对系统阻抗曲线的影响,从而确定影响风电场并网次同步振荡特性的主导因素。然后,结合基于阻抗特性的频域稳定判据对重要参数进行分析,制定具有抑制次同步振荡作用的参数调整方案。最后,通过时域仿真验证了灵敏度分析和参数调整方案的正确性和有效性。
Recently, subsynchronous oscillation(SSO) is observed in many direct drive permanent magnet synchronous generator(D-PMSG) based wind farms integrated in a weak AC grid in Xinjiang Region. At present, impedance-based analysis method is the main research means for system SSO issues. In this paper, the concept of frequency-domain sensitivity was introduced based on impedance-based analysis method, the influence of parameter on system impedance curve is reflected directly by calculating the impedance sensitivity based on impedance model of wind farm and grid, and the leading factors affecting SSO characteristics were determined. Then, a parameter adjustment scheme with SSO suppression was developed by combining with impedance-based stability criterion. Finally, correctness and validity of the sensitivity analysis and parameter adjustment schemes were verified respectively with simulation.
Recently, subsynchronous oscillation(SSO) is observed in many direct drive permanent magnet synchronous generator(D-PMSG) based wind farms integrated in a weak AC grid in Xinjiang Region. At present, impedance-based analysis method is the main research means for system SSO issues. In this paper, the concept of frequency-domain sensitivity was introduced based on impedance-based analysis method, the influence of parameter on system impedance curve is reflected directly by calculating the impedance sensitivity based on impedance model of wind farm and grid, and the leading factors affecting SSO characteristics were determined. Then, a parameter adjustment scheme with SSO suppression was developed by combining with impedance-based stability criterion. Finally, correctness and validity of the sensitivity analysis and parameter adjustment schemes were verified respectively with simulation.
引文
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[8]宋瑞华,郭剑波,李柏青,等.基于输入导纳的直驱风电次同步振荡机理与特性分析[J].中国电机工程学报,2017,37(16):4662-4670.Song Ruihua,Guo Jianbo,Li Baiqing,et al.Mechanism and characteristics of subsynchronous oscillation in direct-drive wind power generation system based on input-admittance analysis[J].Proceedings of the CSEE,2017,37(16):4662-4670(in Chinese).
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[10]王珅,徐政,杜宁,等.并列机组轴系次同步振荡特性及采用SSDC抑制多机系统次同步振荡研究[J].高电压技术,2016,42(1):321-329.Wang Shen,Xu Zheng,Du Ning,et al.Research on shaft subsynchronous oscillation characteristic of parallel generators and SSDC application in mitigating SSO of multi-generator system[J].High Voltage Engineering,2016,42(1):321-329(in Chinese).
[11]刘涛,宋新立,汤涌,等.特征值灵敏度方法及其在电力系统小干扰稳定分析中的应用[J].电网技术,2010,34(4):82-87.Liu Tao,Song Xinli,Tang Yong,et al.Eigenvalue sensitivity and its application in power system small signal stability[J].Power System Technology,2010,34(4):82-87(in Chinese).
[12]董晓亮,田旭,张勇,等.沽源风电场串补输电系统次同步谐振典型事件及影响因素分析[J].高电压技术,2017,43(1):321-328.Dong Xiaoliang,Tian Xu,Zhang Yong,et al.Practical SSR incidence and influence factor analysis of DFIG-based series-compensated transmission system in Guyuan farms[J].High Voltage Technology,2017,43(1):321-328(in Chinese).
[13]严干贵,魏治成,穆钢,等.直驱永磁风电机组的动态建模与运行控制[J].电力系统及其自动化学报,2009,21(6):34-39.Yan Gangui,Wei Zhicheng,Mu Gang,et al.Dynamic modeling and control of directly-driven permanent magnet synchronous generator wind turbine[J].Proceeding of the CSU-EPSA,2009,21(6):34-39(in Chinese).
[14]张冲,王伟胜,何国庆,等.基于序阻抗的直驱风电场次同步振荡分析与锁相环参数优化设计[J].中国电机工程学报2017,37(23):6757-6767.Zhang Chong,Wang Weisheng,He Guoqing,et al.Analysis of sub-synchronous oscillation of full-converter wind farm based on sequence impedance and an optimized design method for PLL parameters[J].Proceedings of the CSEE,2017,37(23):6757-6767(in Chinese).
[15]王赟程,陈新,陈杰,等.基于谐波线性化的三相LCL型并网风机正负序阻抗建模分析[J].中国电机工程学报,2016,36(21):5890-5898.Wang Yuncheng,Chen Xin,Chen Jie,et al.Analysis of positive-sequence and negative-sequence impedance modeling of three-phase LCL-type grid-connected inverters based on harmonic linearization[J].Proceedings of the CSEE,2016,36(21):5890-5898(in Chinese).
[16]鞠平,郭磊,高昌培,等.频域灵敏度及其在电力系统参数辨识中的应用[J].中国电机工程学报,2010,30(28):19-24.Ju Ping,Guo Lei,Gao Changpei,et al.Frequency-domain sensitivity with application to power system modeling[J].Proceedings of the CSEE,2010,30(28):19-24(in Chinese).
[17]Liu H,Xie X,Zhang C,et al.Quantitative SSR analysis of series-compensated DFIG-based wind farms using aggregated RLC circuit model[J].IEEE Transactions on Power Systems,2016,32(1):474-483.
[18]吴恒,阮新波,杨东升,等.弱电网条件下锁相环对LCL型并网逆变器稳定性的影响研究及锁相环参数设计[J].中国电机工程学报,2014,34(30):5259-5268.Wu Heng,Ruan Xinbo,Yang Dongsheng,et al.Research on the stability caused by phase-locked loop for LCL-type grid-connected inverter in weak grid condition[J].Proceedings of the CSEE,2014,34(30):5259-5268(in Chinese).
[2]Wang L,Xie X,Jiang Q,et al.Investigation of SSR in practical DFIG-based wind farms connected to a series-compensated power system[J].IEEE Transactions on Power Systems,2015,30(5):2772-2779.
[3]李景一,毕天姝,于钊,等.直驱风机变流控制系统对次同步频率分量的响应机理研究[J].电网技术,2017,41(6):1734-1740.Li Jingyi,Bi Tianshu,Yu Zhao,et al.Study on response characteristics of grid converter control system of permanent magnet synchronous generators(PMSG)to subsynchronous frequency component[J].Power System Technology,2017,41(6):1734-1740(in Chinese).
[4]李明节,于钊,许涛,等.新能源并网系统引发的复杂振荡问题及其对策研究[J].电网技术,2017,41(4):1035-1042.Li Mingjie,Yu Zhao,Xu Tao,et al.Study of complex oscillation caused by renewable energy integration and its solution[J].Power System Technology,2017,41(4):1035-1042(in Chinese).
[5]辛焕海,李子恒,董炜,等.三相变流器并网系统的广义阻抗及稳定判据[J].中国电机工程学报,2017,37(5):1277-1292.Xin Huanhai,Li Ziheng,Dong Wei,et al.Generalized-impedance and stability criterion for grid-connected converters[J].Proceedings of the CSEE,2017,37(5):1277-1292(in Chinese).
[6]Cespedes M,Sun J.Impedance modeling and analysis of gridconnected voltage-source converters[J].IEEE Transactions on Power Electronics,2013,9(3):1254-1261.
[7]Wen B,Boroyevich D,Burgos R,et al.Small-signal stability analysis of three-phase AC systems in the presence of constant power loads based on measured d-q frame impedances[J].IEEE Transactions on Power Electronics,2015,30(10):5952-5963.
[8]宋瑞华,郭剑波,李柏青,等.基于输入导纳的直驱风电次同步振荡机理与特性分析[J].中国电机工程学报,2017,37(16):4662-4670.Song Ruihua,Guo Jianbo,Li Baiqing,et al.Mechanism and characteristics of subsynchronous oscillation in direct-drive wind power generation system based on input-admittance analysis[J].Proceedings of the CSEE,2017,37(16):4662-4670(in Chinese).
[9]苗峰显,郭志忠.灵敏度方法在电力系统分析与控制中的应用综述[J].继电器,2007,35(15):72-76.Miao Fengxian,Guo Zhizhong.A survey of sensitivity technique and its application in power systems analysis and control[J].Relay,2007,35(15):72-76(in Chinese).
[10]王珅,徐政,杜宁,等.并列机组轴系次同步振荡特性及采用SSDC抑制多机系统次同步振荡研究[J].高电压技术,2016,42(1):321-329.Wang Shen,Xu Zheng,Du Ning,et al.Research on shaft subsynchronous oscillation characteristic of parallel generators and SSDC application in mitigating SSO of multi-generator system[J].High Voltage Engineering,2016,42(1):321-329(in Chinese).
[11]刘涛,宋新立,汤涌,等.特征值灵敏度方法及其在电力系统小干扰稳定分析中的应用[J].电网技术,2010,34(4):82-87.Liu Tao,Song Xinli,Tang Yong,et al.Eigenvalue sensitivity and its application in power system small signal stability[J].Power System Technology,2010,34(4):82-87(in Chinese).
[12]董晓亮,田旭,张勇,等.沽源风电场串补输电系统次同步谐振典型事件及影响因素分析[J].高电压技术,2017,43(1):321-328.Dong Xiaoliang,Tian Xu,Zhang Yong,et al.Practical SSR incidence and influence factor analysis of DFIG-based series-compensated transmission system in Guyuan farms[J].High Voltage Technology,2017,43(1):321-328(in Chinese).
[13]严干贵,魏治成,穆钢,等.直驱永磁风电机组的动态建模与运行控制[J].电力系统及其自动化学报,2009,21(6):34-39.Yan Gangui,Wei Zhicheng,Mu Gang,et al.Dynamic modeling and control of directly-driven permanent magnet synchronous generator wind turbine[J].Proceeding of the CSU-EPSA,2009,21(6):34-39(in Chinese).
[14]张冲,王伟胜,何国庆,等.基于序阻抗的直驱风电场次同步振荡分析与锁相环参数优化设计[J].中国电机工程学报2017,37(23):6757-6767.Zhang Chong,Wang Weisheng,He Guoqing,et al.Analysis of sub-synchronous oscillation of full-converter wind farm based on sequence impedance and an optimized design method for PLL parameters[J].Proceedings of the CSEE,2017,37(23):6757-6767(in Chinese).
[15]王赟程,陈新,陈杰,等.基于谐波线性化的三相LCL型并网风机正负序阻抗建模分析[J].中国电机工程学报,2016,36(21):5890-5898.Wang Yuncheng,Chen Xin,Chen Jie,et al.Analysis of positive-sequence and negative-sequence impedance modeling of three-phase LCL-type grid-connected inverters based on harmonic linearization[J].Proceedings of the CSEE,2016,36(21):5890-5898(in Chinese).
[16]鞠平,郭磊,高昌培,等.频域灵敏度及其在电力系统参数辨识中的应用[J].中国电机工程学报,2010,30(28):19-24.Ju Ping,Guo Lei,Gao Changpei,et al.Frequency-domain sensitivity with application to power system modeling[J].Proceedings of the CSEE,2010,30(28):19-24(in Chinese).
[17]Liu H,Xie X,Zhang C,et al.Quantitative SSR analysis of series-compensated DFIG-based wind farms using aggregated RLC circuit model[J].IEEE Transactions on Power Systems,2016,32(1):474-483.
[18]吴恒,阮新波,杨东升,等.弱电网条件下锁相环对LCL型并网逆变器稳定性的影响研究及锁相环参数设计[J].中国电机工程学报,2014,34(30):5259-5268.Wu Heng,Ruan Xinbo,Yang Dongsheng,et al.Research on the stability caused by phase-locked loop for LCL-type grid-connected inverter in weak grid condition[J].Proceedings of the CSEE,2014,34(30):5259-5268(in Chinese).