风-光伏混合电场并网对电力系统次同步振荡的影响
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摘要
本文研究了风-光伏混合电场接入对电力系统次同步振荡模式的影响:首先建立了风-光伏混合电场并网电力系统的数学模型,并结合算例系统分析了风-光伏混合电场中风速、光照强度、输出有功功率、风/光功率比、DC/DC换流器MPPT控制参数、网侧换流器d轴和q轴电流内环控制参数、滤波线路电感、锁相环控制参数等参数变化时系统中主要振荡模式变化的轨迹。研究表明风-光伏混合电场接入不直接参与系统中与同步发电机轴系相关的次同步振荡模式,但参数变化可能导致与风-光伏混合电场相关的次同步振荡模式失稳。而在风-光伏混合电场网侧换流器附加阻尼控制器可以提升系统阻尼,抑制次同步振荡。模态分析和非线性仿真结果验证了阻尼控制器的效果。
The influence of wind-photovoltaic hybrid farm's intergration on the sub-synchronous oscillation of power system is studied in this paper. Firstly, the mathematical model of power system connected with wind-photovoltaic hybrid farm is established. And the trajectory of main oscillation mode change when the parameters change in wind-photovoltaic hybrid farm combined with the benchmark, these parameters are wind speed, intensity of illumination, output active power, wind/photovoltaic power ratio, DC/DC inverter MPPT control parameter, inner ring control parameter of d and q axis currents of converter at grid side, inductance of filter lines, phase-locked loop control parameter and etc. It is found that wind-photovoltaic hybrid farm's intergration almost does not affect the sub-synchronous oscillation modes associated with synchronous generators' shafting. However, the variation of wind-photovoltaic hybrid farm's parameters may lead to the instability of the sub-synchronous oscillation mode associated with the wind-photovoltaic hybrid farm. Sub-synchronous damping controller attached to the grid-side converter of wind-photovoltaic hybrid farm can improve the damping of power system and suppress the sub-synchronous oscillation. And the results of modal analysis and nonlinear simulation verify the effectiveness of the sub-synchronous damping controller.
The influence of wind-photovoltaic hybrid farm's intergration on the sub-synchronous oscillation of power system is studied in this paper. Firstly, the mathematical model of power system connected with wind-photovoltaic hybrid farm is established. And the trajectory of main oscillation mode change when the parameters change in wind-photovoltaic hybrid farm combined with the benchmark, these parameters are wind speed, intensity of illumination, output active power, wind/photovoltaic power ratio, DC/DC inverter MPPT control parameter, inner ring control parameter of d and q axis currents of converter at grid side, inductance of filter lines, phase-locked loop control parameter and etc. It is found that wind-photovoltaic hybrid farm's intergration almost does not affect the sub-synchronous oscillation modes associated with synchronous generators' shafting. However, the variation of wind-photovoltaic hybrid farm's parameters may lead to the instability of the sub-synchronous oscillation mode associated with the wind-photovoltaic hybrid farm. Sub-synchronous damping controller attached to the grid-side converter of wind-photovoltaic hybrid farm can improve the damping of power system and suppress the sub-synchronous oscillation. And the results of modal analysis and nonlinear simulation verify the effectiveness of the sub-synchronous damping controller.
引文
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[8] LIU S,LIU P X,WANG X.Stochastic small-signal stability analysis of grid-connected photovoltaic systems [J].IEEE Transactions on Industrial Electronics,2016,63(2):1027-1038.
[9] 葛景,都洪基,赵大伟,等.光伏电站接入对多机电力系统低频振荡的影响分析[J].电力系统自动化,2016,40(22):63-70.GE Jing,DU Hongji,ZHAO Dawei,et al.Influences of grid-connected photovoltaic power plants on low frequency oscillation of multi-machine power systems [J].Automation of Electric Power Systems,2016,40(22):63-70.
[10] DU W,WANG H F,XIAO L Y.Power system small-signal stability as affected by grid-connected photovoltaic generation [J] .European Transactions on Electrical Power,2011,21(5):688-703.
[11] EL-SHIMY M,SHARAF A,KHAIRY H.Reduced-order modelling of solar-PV generators for small-signal stability assessment of power systems and estimation of maximum penetration levels [J].IET Generation,Transmission & Distribution,2018,12(8):1838-1847.
[12] TANG H,LU G,YU X,et al.Investigating SSO risks of large-scale photovoltaic generation with the series compensated transmission lines [J].The Journal of Engineering,2017,2017(13):2048-2052.
[13] MORADI-SHAHRBABAK Z,TABESH A.Effects of front-end converter and DC-link of a utility-scale PV energy system on dynamic stability of a power system [J].IEEE Transactions on Industrial Electronics,2017,PP(99):1-1.
[14] WANG L,VO Q S,PROKHOROV A V.Stability improvement of a multimachine power system connected with a large-scale hybrid wind-photovoltaic farm using a supercapacitor [J].IEEE Transactions on Industry Applications,2018,54(1):50-60.
[15] LI S,HASKEW T A,SWATLOSKI R P,et al.Optimal and direct-current vector control of direct-driven PMSG wind turbines [J].IEEE Transactions on Power Electronics,2012,27(5):2325-2337.
[16] 王旭斌,杜文娟,王海风.直驱风电并网系统中锁相环引起次同步振荡的开环模式谐振机理分析[J].中国电机工程学报,2018,38(7):1935-1950,220.WANG Xubin,DU Wenjuan,WANG Haifeng.Mechanism analysis of open-loop modal resonance on subsynchronous oscillations caused by PLL in power systems with integrated PMSGs [J].Proceedings of the CSEE,2018,38(7):1935-1950,220.
[17] 程时杰,曹一家,江全元.电力系统次同步振荡的理论与方法[M].北京:科学出版社,2009:21-44.
[18] 苏田宇,杜文娟,王海风.并网风电场次同步振荡抑制措施研究综述[J].南方电网技术,2018,12(4):60-69.SU Tianyu,DU Wenjuan,WANG Haifeng.Review of subsynchronous oscillation suppression measures for grid-connected wind farms [J].Southern Power System Techology,2018,12(4):60-69.
[19] SHAH R,MITHULANANTHAN N,LEE K Y.Large-scale PV plant with a robust controller considering power oscillation damping [J].IEEE Transactions on Energy Conversion,2013,28(1):106-116.
[20] SHEN Y,YAO W,WEN J,et al.Adaptive wide-area power oscillation damper design for photovoltaic plant considering delay compensation [J].IET Generation,Transmission & Distribution,2017,11(18):4511-4519.
[2] BELKIN P.Event of 10/22/09 [EB/OL].[2010-01-26].http://www.er-cot.com/calendar/2010/01/20100126-TECH.2010-01-26.
[3] ADAMS J,PAPPU V,DIXIT A.Ercot experience screening for sub-synchronous control interaction in the vicinity of series capacitor banks [C]//2012 IEEE Power and Energy Society General Meeting,July 22-26,2012,San Diego,USA.New York:IEEE,2012:1-5.
[4] 董晓亮,谢小荣,杨煜,等.双馈风机串补输电系统次同步谐振影响因素及稳定区域分析[J].电网技术,2015,39(1):189-193.DONG Xiaoliang,XIE Xiaorong,YANG Yu,et al.Impacting factors and stable area analysis of subsynchronous resonance in DFIG based wind farms connected to series-compensated power system [J].Power System Technology,2015,39(1):189-193.
[5] 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 influencing factor analysis of DFIG-based series-compensated transmission system in Guyuan farms [J].High Voltage Engineering,2017,43(1):321-328.
[6] 谢小荣,刘华坤,贺静波,等.直驱风机风电场与交流电网相互作用引发次同步振荡的机理与特性分析[J].中国电机工程学报,2016,36(9):2366-2372.XIE Xiaorong,LIU Huakun,HE Jingbo,et al.Mechanism and characteristics of subsynchronous oscillation caused by the interaction between full-converter wind turbines and AC systems [J].Proceedings of the CSEE,2016,36(9):2366-2372.
[7] 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.
[8] LIU S,LIU P X,WANG X.Stochastic small-signal stability analysis of grid-connected photovoltaic systems [J].IEEE Transactions on Industrial Electronics,2016,63(2):1027-1038.
[9] 葛景,都洪基,赵大伟,等.光伏电站接入对多机电力系统低频振荡的影响分析[J].电力系统自动化,2016,40(22):63-70.GE Jing,DU Hongji,ZHAO Dawei,et al.Influences of grid-connected photovoltaic power plants on low frequency oscillation of multi-machine power systems [J].Automation of Electric Power Systems,2016,40(22):63-70.
[10] DU W,WANG H F,XIAO L Y.Power system small-signal stability as affected by grid-connected photovoltaic generation [J] .European Transactions on Electrical Power,2011,21(5):688-703.
[11] EL-SHIMY M,SHARAF A,KHAIRY H.Reduced-order modelling of solar-PV generators for small-signal stability assessment of power systems and estimation of maximum penetration levels [J].IET Generation,Transmission & Distribution,2018,12(8):1838-1847.
[12] TANG H,LU G,YU X,et al.Investigating SSO risks of large-scale photovoltaic generation with the series compensated transmission lines [J].The Journal of Engineering,2017,2017(13):2048-2052.
[13] MORADI-SHAHRBABAK Z,TABESH A.Effects of front-end converter and DC-link of a utility-scale PV energy system on dynamic stability of a power system [J].IEEE Transactions on Industrial Electronics,2017,PP(99):1-1.
[14] WANG L,VO Q S,PROKHOROV A V.Stability improvement of a multimachine power system connected with a large-scale hybrid wind-photovoltaic farm using a supercapacitor [J].IEEE Transactions on Industry Applications,2018,54(1):50-60.
[15] LI S,HASKEW T A,SWATLOSKI R P,et al.Optimal and direct-current vector control of direct-driven PMSG wind turbines [J].IEEE Transactions on Power Electronics,2012,27(5):2325-2337.
[16] 王旭斌,杜文娟,王海风.直驱风电并网系统中锁相环引起次同步振荡的开环模式谐振机理分析[J].中国电机工程学报,2018,38(7):1935-1950,220.WANG Xubin,DU Wenjuan,WANG Haifeng.Mechanism analysis of open-loop modal resonance on subsynchronous oscillations caused by PLL in power systems with integrated PMSGs [J].Proceedings of the CSEE,2018,38(7):1935-1950,220.
[17] 程时杰,曹一家,江全元.电力系统次同步振荡的理论与方法[M].北京:科学出版社,2009:21-44.
[18] 苏田宇,杜文娟,王海风.并网风电场次同步振荡抑制措施研究综述[J].南方电网技术,2018,12(4):60-69.SU Tianyu,DU Wenjuan,WANG Haifeng.Review of subsynchronous oscillation suppression measures for grid-connected wind farms [J].Southern Power System Techology,2018,12(4):60-69.
[19] SHAH R,MITHULANANTHAN N,LEE K Y.Large-scale PV plant with a robust controller considering power oscillation damping [J].IEEE Transactions on Energy Conversion,2013,28(1):106-116.
[20] SHEN Y,YAO W,WEN J,et al.Adaptive wide-area power oscillation damper design for photovoltaic plant considering delay compensation [J].IET Generation,Transmission & Distribution,2017,11(18):4511-4519.
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