面向风电场并网的VSC-MTDC频率控制策略研究
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摘要
文中建立了基于VSC-MTDC的风电场并网三端系统,充分利用直流响应可控性强,速度快的优点,根据柔性直流输电对有功功率和无功功率独立、快速控制的特点,提出了用VSC-HVDC与发电机调速器协调控制的方法,通过对给定有功功率控制器附加频率控制来提高交流系统频率稳定性。理论分析和仿真结果表明该控制策略能提高多端柔性直流输电系统的频率调整能力,当系统受到扰动时,能有效的改善系统频率稳定性。
This paper constructs a three-terminal system connecting wind farm grid based on VSC-MTDC,and makes fully use of the advantages of the DC response featuring with strong controllability and fast speed. Therefore,this paper proposes a coordinated control method of VSC-HVDC and governor according to the characteristics of the VSCHVDC have control active power and reactive power independently and quickly,in virtue of setting additional frequency control in the constant active power controller to improve AC system frequency stability. Theoretical analysis and simulation results show that the proposed control strategy can improve the frequency adjustment ability of multi-terminal HVDC system,and it can effectively improve the system frequency stability when the system is disturbed.
This paper constructs a three-terminal system connecting wind farm grid based on VSC-MTDC,and makes fully use of the advantages of the DC response featuring with strong controllability and fast speed. Therefore,this paper proposes a coordinated control method of VSC-HVDC and governor according to the characteristics of the VSCHVDC have control active power and reactive power independently and quickly,in virtue of setting additional frequency control in the constant active power controller to improve AC system frequency stability. Theoretical analysis and simulation results show that the proposed control strategy can improve the frequency adjustment ability of multi-terminal HVDC system,and it can effectively improve the system frequency stability when the system is disturbed.
引文
[1]徐政,译.风力发电的模拟与控制[M].北京:机械工业出版社,2011:149-151.
[2]陈海荣,徐政.向无源网络供电的VSC-HVDC系统的制器设计[J].中国电机工程学报,2006,26(23):42-48.Chen Hairong,Xu Zheng.Control design for VSC-HVDC supplying passive network[J].Proceedings of the CSEE,2006,26(23):42-48.
[3]胡兆庆,毛承雄,陆继明.一种优化控制策略在基于电压源换流器的HVDC系统中的应用[J].电网技术,2004,28(10):38-41.Hu Zhaoqing,Mao Chengxiong,Lu Jiming.Application of an optimal control strategy to a new type of HVDC system based on voltage source converters[J].Power System Tech-nology,2004,28(10):38-41.
[4]Nakajima T.Operating Experiences of STATCOMs and a Three-terminal HVDC System Using Voltage Sourced Conv-nverters in Japan[C].Transmission and Distribution Confere-nce and Exhibition 200:Asia Pacific.IEEE/PES,2002,6(10):1387-1392.
[5]FLOURENTZOU N,A GELIDIS V,DEMETRIADES G.VSC based hvdc power transmission system:An overview[J].IEEE Transactions on Power Electronics,2009,24(3):593-6 02.
[6]汤广福,贺之渊,庞辉.柔性直流输电工程技术研究应用及发展[J].电力系统自动化,2013,37(15):3-14.Tang Guangfu,He Zhiyuan,Pang Hui.Research application and development of VSC-HVDC engineering technology[J].Automation of Electric Power Systems,2013,37(15):3-14.
[7]任敬国,李可军,刘合金,等.基于改进定有功功率控制特性的VSCMTDC系统仿真[J].电力系统自动化,2013,37(15):133-139.Ren Jingguo,Li Kejun,Liu Hejin,et al.Coordinated control strategy of VSC-MTDC system based on improved DC volta ge-active power characteristic[J].Automation of Electric Po-wer Systems,2013,37(15):133-139.
[8]Lu Weixing.Control and application of multi-ternimal HVDC based on voltage-source converter[D].Montreal,Canada:Mc Gill University,2003.
[9]吴俊宏,艾芊.多端柔性直流输电系统在风电场中的应用[J].电网技术,2009,33(4):22-27.Wu Junhong,Ai Qian.Research on Multiterminal vcs-hvdc System for Wind-Farms[J].Power System Technology,2009,33(4):22-27.
[10]管清伟.VSC-MTDC并联运行及其电压控制[D].北京:北京交通大学电气工程学院,2012:39-55.Guang Qingwei.The Parallel Mode of VSC-MTDC and Volt-age Control[D].Beijing:School of Electrical Engineering,Beijing Jiaotong University,2012:39-55.
[11]程丽敏,李兴源.多区域交直流互联系统的频率稳定控制[J].电力系统保护与控制,2011,39(7):56-62.Cheng Limin,Li Xingyuan.Load frequency control in multi-area AC/DC interconnected power system[J].Power System Protection and Control,2011,39(7):56-62.
[12]汤广福.基于电压源换流器的高压直流输电技术[M].北京:中国电力出版社,2009:123-128.
[2]陈海荣,徐政.向无源网络供电的VSC-HVDC系统的制器设计[J].中国电机工程学报,2006,26(23):42-48.Chen Hairong,Xu Zheng.Control design for VSC-HVDC supplying passive network[J].Proceedings of the CSEE,2006,26(23):42-48.
[3]胡兆庆,毛承雄,陆继明.一种优化控制策略在基于电压源换流器的HVDC系统中的应用[J].电网技术,2004,28(10):38-41.Hu Zhaoqing,Mao Chengxiong,Lu Jiming.Application of an optimal control strategy to a new type of HVDC system based on voltage source converters[J].Power System Tech-nology,2004,28(10):38-41.
[4]Nakajima T.Operating Experiences of STATCOMs and a Three-terminal HVDC System Using Voltage Sourced Conv-nverters in Japan[C].Transmission and Distribution Confere-nce and Exhibition 200:Asia Pacific.IEEE/PES,2002,6(10):1387-1392.
[5]FLOURENTZOU N,A GELIDIS V,DEMETRIADES G.VSC based hvdc power transmission system:An overview[J].IEEE Transactions on Power Electronics,2009,24(3):593-6 02.
[6]汤广福,贺之渊,庞辉.柔性直流输电工程技术研究应用及发展[J].电力系统自动化,2013,37(15):3-14.Tang Guangfu,He Zhiyuan,Pang Hui.Research application and development of VSC-HVDC engineering technology[J].Automation of Electric Power Systems,2013,37(15):3-14.
[7]任敬国,李可军,刘合金,等.基于改进定有功功率控制特性的VSCMTDC系统仿真[J].电力系统自动化,2013,37(15):133-139.Ren Jingguo,Li Kejun,Liu Hejin,et al.Coordinated control strategy of VSC-MTDC system based on improved DC volta ge-active power characteristic[J].Automation of Electric Po-wer Systems,2013,37(15):133-139.
[8]Lu Weixing.Control and application of multi-ternimal HVDC based on voltage-source converter[D].Montreal,Canada:Mc Gill University,2003.
[9]吴俊宏,艾芊.多端柔性直流输电系统在风电场中的应用[J].电网技术,2009,33(4):22-27.Wu Junhong,Ai Qian.Research on Multiterminal vcs-hvdc System for Wind-Farms[J].Power System Technology,2009,33(4):22-27.
[10]管清伟.VSC-MTDC并联运行及其电压控制[D].北京:北京交通大学电气工程学院,2012:39-55.Guang Qingwei.The Parallel Mode of VSC-MTDC and Volt-age Control[D].Beijing:School of Electrical Engineering,Beijing Jiaotong University,2012:39-55.
[11]程丽敏,李兴源.多区域交直流互联系统的频率稳定控制[J].电力系统保护与控制,2011,39(7):56-62.Cheng Limin,Li Xingyuan.Load frequency control in multi-area AC/DC interconnected power system[J].Power System Protection and Control,2011,39(7):56-62.
[12]汤广福.基于电压源换流器的高压直流输电技术[M].北京:中国电力出版社,2009:123-128.