混合双馈入直流输电控制系统交互影响机理分析
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摘要
针对由彼此落点接近的一条基于模块化多电平换流器型高压直流输电(modular multilevel converter based HVDC,MMC-HVDC)线路和一条电网换相换流器型高压直流输电(line commutated converter based high voltage direct current,LCC-HVDC)线路所构成的混合双馈入直流输电系统,基于多变量反馈控制理论建立可定量分析和评估MMC-HVDC与LCC-HVDC控制系统之间交互影响的等效独立控制通道。在此基础之上,定量分析评估LCC定关断角控制器、锁相环以及MMC锁相环、外环控制器、环流抑制器对MMC-HVDC与LCC-HVDC控制系统交互作用及小干扰稳定性的影响。最后,在PSCAD/EMTDC上搭建混合双馈入直流输电系统的电磁暂态详细仿真模型,仿真验证理论分析结果的有效性。
In order to quantitatively evaluate the interactions between modular multilevel converter based high voltage direct current(MMC-HVDC) control system and line commutated converter based high voltage direct current(LCC-HVDC) control system in a dual-infeed hybrid HVDC system which consists of a MMC-HVDC and a LCC-HVDC link locating in close mutual proximity, an equivalent individual control channel of the dual-infeed hybrid HVDC system was established based on multivariate feedback control theory. Then, the impact of LCC constant extinction angle controller, LCC phase-locked loop(PLL), MMC-PLL, MMC outer-loop controller and MMC circulating current suppression controller on the control interactions between MMC control system and LCC control system and the small-signal stability were quantitatively evaluated. Finally, the effectiveness of the theoretical analysis results were validated by a detailed dual-infeed hybrid HVDC electromagnetism transient model in PSCAD/EMTDC.
In order to quantitatively evaluate the interactions between modular multilevel converter based high voltage direct current(MMC-HVDC) control system and line commutated converter based high voltage direct current(LCC-HVDC) control system in a dual-infeed hybrid HVDC system which consists of a MMC-HVDC and a LCC-HVDC link locating in close mutual proximity, an equivalent individual control channel of the dual-infeed hybrid HVDC system was established based on multivariate feedback control theory. Then, the impact of LCC constant extinction angle controller, LCC phase-locked loop(PLL), MMC-PLL, MMC outer-loop controller and MMC circulating current suppression controller on the control interactions between MMC control system and LCC control system and the small-signal stability were quantitatively evaluated. Finally, the effectiveness of the theoretical analysis results were validated by a detailed dual-infeed hybrid HVDC electromagnetism transient model in PSCAD/EMTDC.
引文
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[12]Wang Li,Yang Zhihao,Lu Xiuyu,et al.Stability analysis of a hybrid multi-infeed HVdc system connected between two offshore wind farms and two power grids[J].IEEETransactions on Industry Applications,2017,53(3):1824-1833.
[13]Guo Chunyi,Liu Wei,Zhao Chengyong,et al.Smallsignal dynamics and control parameters optimization of hybrid multi-infeed HVDC system[J].International Journal of Electrical Power&Energy Systems,2018,98:409-418.
[14]Szechtman M,Wess T,Thio C V.A benchmark model for HVDC system studies[C]//International Conference on Ac and Dc Power Transmission.London,UK:IEEE,1991:374-378.
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[16]Li Tan,Gole A M,Zhao Chengyong.Harmonic instability in MMC-HVDC converters resulting from internal dynamics[J].IEEE Transactions on Power Delivery,2016,31(4):1738-1747.
[17]O'Reilly J,Leithead W E.Multivariable control by‘individual channel design’[J].International Journal of Control,1991,54(1):1-46.
[18]Skogestad S.Postlethwaite I.Multivariable feedback control[M].New York:Wiley,2005:55-64.
[2]Yazdani A,Iravani R.Voltage-sourced converters in power systems:modeling,control,and applications[M].New York,NY:IEEE Press/John Wiley,2010.
[3]徐政,屠卿瑞,管敏渊,等.柔性直流输电系统[M].北京:机械工业出版社,2013:5-6.Xu Zheng,Tu Qingrui,Guan Minyuan,et al.Flexible direct current transmission system[M].Beijing:China Machine Press,2013:5-6(in Chinese).
[4]周保荣,洪潮,金小明,等.南方电网同步运行网架向异步运行网架的转变研究[J].中国电机工程学报,2016,36(8):2084-2092.Zhou Baorong,Hong Chao,Jin Xiaoming,et al.Study of backbone structure change from synchronous to asynchronous in China Southern power grid[J].Proceedings of the CSEE,2016,36(8):2084-2092(in Chinese).
[5]ABB Group.Skagerrak HVDC interconnections[EB/OL].(2011-02-11).[2015-03-09]http://www.abb.com/industries/ap/db0003db004333/448A5ECA0D6E15D3C12578310031E3A7.aspx.
[6]Aik D L H,Andersson G.Impact of renewable energy sources on steady-state stability of weak AC/DCsystems[J].CSEE Journal of Power and Energy Systems,2017,3(4):419-430.
[7]Guo Chunyi,Zhang Yi,Gole A M,et al.Analysis of dual-infeed HVDC with LCC-HVDC and VSC-HVDC[J].IEEE Transactions on Power Delivery,2012,27(3):1529-1537.
[8]郭春义,倪晓军,赵成勇.混合多馈入直流输电系统相互作用关系的定量评估方法[J].中国电机工程学报,2016,36(7):1772-1780.Guo Chunyi,Ni Xiaojun,Zhao Chengyong.A quantitative evaluation method on interaction analysis of hybrid multi-infeed HVDC system[J].Proceedings of the CSEE,2016,36(7):1772-1780(in Chinese).
[9]倪晓军,赵成勇,郭春义,等.混合双馈入直流系统中VSC-HVDC对LCC-HVDC受端系统强度的影响[J].中国电机工程学报,2015,35(16):4052-4061.Ni Xiaojun,Zhao Chengyong,Guo Chunyi,et al.The effects of VSC-HVDC on the system strength of LCC-HVDC in dual-infeed hybrid HVDC system[J].Proceedings of the CSEE,2015,35(16):4052-4061(in Chinese).
[10]肖浩,李银红,何璇,等.混合多馈入直流系统换相失败免疫水平快速评估方法[J].中国电机工程学报,2017,37(17):4986-4998.Xiao Hao,Li Yinhong,He Xuan,et al.A rapid assessment method of commutation failure immunity level for hybrid multi-infeed HVDC transmission systems[J].Proceedings of the CSEE,2017,37(17):4986-4998(in Chinese).
[11]刘炜,赵成勇,郭春义,等.混合双馈入直流系统中LCC-HVDC对VSC-HVDC稳态运行区域的影响[J].中国电机工程学报,2017,37(13):3764-3774.Liu Wei,Zhao Chengyong,Guo Chunyi,et al.The effect of LCC-HVDC on stable operating area of VSC-HVDC in dual-infeed hybrid HVDC system[J].Proceedings of the CSEE,2017,37(13):3764-3774(in Chinese).
[12]Wang Li,Yang Zhihao,Lu Xiuyu,et al.Stability analysis of a hybrid multi-infeed HVdc system connected between two offshore wind farms and two power grids[J].IEEETransactions on Industry Applications,2017,53(3):1824-1833.
[13]Guo Chunyi,Liu Wei,Zhao Chengyong,et al.Smallsignal dynamics and control parameters optimization of hybrid multi-infeed HVDC system[J].International Journal of Electrical Power&Energy Systems,2018,98:409-418.
[14]Szechtman M,Wess T,Thio C V.A benchmark model for HVDC system studies[C]//International Conference on Ac and Dc Power Transmission.London,UK:IEEE,1991:374-378.
[15]Guo Chunyi,Zhao Chengyong,Iravani R,et al.Impact of phase-locked loop on small-signal dynamics of the line commutated converter-based high-voltage direct-current station[J].IET Generation,Transmission&Distribution,2017,11(5):1311-1318.
[16]Li Tan,Gole A M,Zhao Chengyong.Harmonic instability in MMC-HVDC converters resulting from internal dynamics[J].IEEE Transactions on Power Delivery,2016,31(4):1738-1747.
[17]O'Reilly J,Leithead W E.Multivariable control by‘individual channel design’[J].International Journal of Control,1991,54(1):1-46.
[18]Skogestad S.Postlethwaite I.Multivariable feedback control[M].New York:Wiley,2005:55-64.