基于VSC-HVDC并网的海上风电场无功补偿控制策略
|
摘要
随着规模的扩大和并网距离的增加,海上风电场对电网电压稳定性影响愈加显著。针对经VSC-HVDC并网的双馈型海上风电场,逐一分析双馈机组(Double-fed induction generators,DFIG)特性和VSC-HVDC系统结构特征以及控制模型。在此基础上提出利用风电场侧换流站、风机网侧变流器和转子侧变流器三者相协调的无功控制策略,以提高系统电压稳定性。最后以CIGRE B4-39系统为例,运用DIgSILENT软件进行建模仿真,分析海上风电场出口母线电压发生跌落事故时并网点电压、各无功电源输出功率和风电场有功功率波动曲线,验证该控制策略的有效性。
With the expansion of the scale and the increase of grid-connected distance,the impact of offshore wind farms with double-fed induction generators( DFIG) on the voltage stability of power systems becomes increasingly important. This paper analyzed the system structure and control model of DFIG and VSC-HVDC for offshore wind farms connected to grid via VSC-HVDC. On the basis of which,this paper proposed a reactive power control strategy which coordinates the wind farm side converter station,the fan grid side converter and the generator side converter to improve the stability of system voltage. Finally,with the aid of DIgSILENT software,the CIGRE B4-39 system was taken as an example to analyze the fluctuation of grid-connected voltage,output power of reactive power and active power when voltage of wind farm output bus dropped. The control strategy was verified by the research.
With the expansion of the scale and the increase of grid-connected distance,the impact of offshore wind farms with double-fed induction generators( DFIG) on the voltage stability of power systems becomes increasingly important. This paper analyzed the system structure and control model of DFIG and VSC-HVDC for offshore wind farms connected to grid via VSC-HVDC. On the basis of which,this paper proposed a reactive power control strategy which coordinates the wind farm side converter station,the fan grid side converter and the generator side converter to improve the stability of system voltage. Finally,with the aid of DIgSILENT software,the CIGRE B4-39 system was taken as an example to analyze the fluctuation of grid-connected voltage,output power of reactive power and active power when voltage of wind farm output bus dropped. The control strategy was verified by the research.
引文
[1]迟永宁,梁伟,张占奎,等.大规模海上风电输电与并网关键技术研究综述[J].中国电机工程学报,2016,36(14):3758-3771.CHI Yongning,LIANG Wei,ZHANG Zhankui,et al.An overview on key technologies regarding power transmission and grid integration of Large Scale Offshore wind power[J]. Proceedings of the CSEE,2016,36(14):3758-3771.
[2]洪敏,辛焕海,徐晨博,等.海上风电场与柔性直流输电系统的新型协调控制策略[J].电力系统自动化,2016,40(21):53-58.HONG Min,XIN Huanhai,XU Chenbo,et al. Coordinated Control Strategy of Offshore Wind Farms and VSC-based HVDC Transmission Systems[J]. Automation of Electric Power Systems,2016,40(21):53-58.
[3]AKHMATOV V. Experience with Voltage Control from Large Offshore Windfarms:The Danish Case[J].Wind Energy,2009,12:692-711.
[4]SHI Y Q,SHEN H,DONG L,et al. The coordination control of voltage and reactive power between wind turbines and SVC in large scale wind farm[C]. International Conference on Power System Technology,Hangzhou:2010:1-6.
[5]ZHANG J J,YIN Z D,XIAO X N,et al. Enhancement voltage stability of wind farm access to power grid by novel SVC[C]. 4th IEEE Confer-ence on Industrial Electronics and Applications,Xi'an:2009:2262-2266.
[6]杨立宁,施勇,王本利,等.考虑海缆充电功率的海上风电场无功补偿协调控制策略研究[J].电机与控制应用,2016,43(8):80-87.YANG Lining,SHI Yong,WANG Benli,et al. Study on coordinate control strategy for reactive power compensation of offshore wind farm considering cable power[J]. Electric Machines and Control Application,2016,43(8):80-87.
[7]符杨,潘翔龙,黄玲玲.考虑双馈机组无功调节能力的海上风电场无功优化[J].电网技术,2014,38(8):2168-2173.FU Yang,PAN Xianglong,HUANG Lingling. Reactive power optimation for offshore wind farm considering reactive power regulation capability of Doubly-fed induction generators[J]. Power System Technology,2014,38(8):2168-2173.
[8]陈澜,杨苹,周少雄,等.电网电压跌落对海上风电系统无功补偿的影响分析[J].电力与能源,2014,35(4):521-524.CHEN Lan,YANG Ping,ZHOU Shaoxiong,et al. Influence of grid voltage drop on th reactive power compensation of offshore wind farms[J]. Power and Energy,2014,35(4):521-524.
[9]NGUYEN T H,LEE DC,VAN TA L,et al. Coordinated control of reactive power between STATCOMS and wind farms for pcc voltage regulation[J]. Journal of Power Electronics,2013,13(5):909-916.
[10]NGUYEN T H,LEE D C. Advanced fault ride-through technique for pmsg wind turbine systems using line-side converter as station[J]. IEEE Transactions on Industrial Electronics,2013,60(7):2842:2850.
[11]熊信恒,陈柏超,袁佳歆.考虑海底电缆的海上风电场动态感性无功补偿[J].武汉大学学报(工学版),2016,49(4):591-596.XIONG Xinheng,CHEN Baichao,YUAN Jiayin,et al.Dynamic inductive reactive power compen-sation of offshore wind farms considering submarine cable[J]. Engineering Journal of Wuhan University,2016,49(4):591-596.
[12]王松,李庚银,周明.双馈风力发电机无功调节机理及无功控制策略[J].中国电机工程学报,2014,34(16):2714-2720.WANG Song,LI Gengyin,ZHOU Ming. The reactive power adjusting mechanism&control strategy of doubly fed induction generator[J]. Proceedings of the CSEE,2014,34(16):2714-2720.
[13]赵大伟,马进,钱敏慧,等.海上风电场经交流电缆送出系统的无功配置与协调控制策略[J].电网技术,2017,41(5):1412-1421.ZHAO Dawei,MA Jin,QIAN Mianhui,et al. Reactive power configuration and coordinated control of offshore wind farms connected to power grid with AC cables[J]. Power System Technology,2017,41(5):1412-1421.
[14]王成福,梁军,韩学山,等.基于静止同步补偿器的风电场无功电压控制策略[J].中国电机工程学报,2010,30(25):23-28.WANG Chengfu,LIANG Jun,HAN Xueshan,et al.Reactive power and voltage control strategy for wind farm based on STATCOM[J]. Proceedings of the CSEE,2010,30(25):23-28.
[15]王锡凡,卫晓辉,王秀丽,等.海上风电并网与输送方案比较[J].中国电机工程学报,2014,34(31):5459-5466.WANG Xifan,WEI Xiaohui,WANG Xiuli,et al. Integration techniques and transmission schemes for offshore wind farms[J]. Proceedings of the CSEE,2014,34(31):5459-5466.
[2]洪敏,辛焕海,徐晨博,等.海上风电场与柔性直流输电系统的新型协调控制策略[J].电力系统自动化,2016,40(21):53-58.HONG Min,XIN Huanhai,XU Chenbo,et al. Coordinated Control Strategy of Offshore Wind Farms and VSC-based HVDC Transmission Systems[J]. Automation of Electric Power Systems,2016,40(21):53-58.
[3]AKHMATOV V. Experience with Voltage Control from Large Offshore Windfarms:The Danish Case[J].Wind Energy,2009,12:692-711.
[4]SHI Y Q,SHEN H,DONG L,et al. The coordination control of voltage and reactive power between wind turbines and SVC in large scale wind farm[C]. International Conference on Power System Technology,Hangzhou:2010:1-6.
[5]ZHANG J J,YIN Z D,XIAO X N,et al. Enhancement voltage stability of wind farm access to power grid by novel SVC[C]. 4th IEEE Confer-ence on Industrial Electronics and Applications,Xi'an:2009:2262-2266.
[6]杨立宁,施勇,王本利,等.考虑海缆充电功率的海上风电场无功补偿协调控制策略研究[J].电机与控制应用,2016,43(8):80-87.YANG Lining,SHI Yong,WANG Benli,et al. Study on coordinate control strategy for reactive power compensation of offshore wind farm considering cable power[J]. Electric Machines and Control Application,2016,43(8):80-87.
[7]符杨,潘翔龙,黄玲玲.考虑双馈机组无功调节能力的海上风电场无功优化[J].电网技术,2014,38(8):2168-2173.FU Yang,PAN Xianglong,HUANG Lingling. Reactive power optimation for offshore wind farm considering reactive power regulation capability of Doubly-fed induction generators[J]. Power System Technology,2014,38(8):2168-2173.
[8]陈澜,杨苹,周少雄,等.电网电压跌落对海上风电系统无功补偿的影响分析[J].电力与能源,2014,35(4):521-524.CHEN Lan,YANG Ping,ZHOU Shaoxiong,et al. Influence of grid voltage drop on th reactive power compensation of offshore wind farms[J]. Power and Energy,2014,35(4):521-524.
[9]NGUYEN T H,LEE DC,VAN TA L,et al. Coordinated control of reactive power between STATCOMS and wind farms for pcc voltage regulation[J]. Journal of Power Electronics,2013,13(5):909-916.
[10]NGUYEN T H,LEE D C. Advanced fault ride-through technique for pmsg wind turbine systems using line-side converter as station[J]. IEEE Transactions on Industrial Electronics,2013,60(7):2842:2850.
[11]熊信恒,陈柏超,袁佳歆.考虑海底电缆的海上风电场动态感性无功补偿[J].武汉大学学报(工学版),2016,49(4):591-596.XIONG Xinheng,CHEN Baichao,YUAN Jiayin,et al.Dynamic inductive reactive power compen-sation of offshore wind farms considering submarine cable[J]. Engineering Journal of Wuhan University,2016,49(4):591-596.
[12]王松,李庚银,周明.双馈风力发电机无功调节机理及无功控制策略[J].中国电机工程学报,2014,34(16):2714-2720.WANG Song,LI Gengyin,ZHOU Ming. The reactive power adjusting mechanism&control strategy of doubly fed induction generator[J]. Proceedings of the CSEE,2014,34(16):2714-2720.
[13]赵大伟,马进,钱敏慧,等.海上风电场经交流电缆送出系统的无功配置与协调控制策略[J].电网技术,2017,41(5):1412-1421.ZHAO Dawei,MA Jin,QIAN Mianhui,et al. Reactive power configuration and coordinated control of offshore wind farms connected to power grid with AC cables[J]. Power System Technology,2017,41(5):1412-1421.
[14]王成福,梁军,韩学山,等.基于静止同步补偿器的风电场无功电压控制策略[J].中国电机工程学报,2010,30(25):23-28.WANG Chengfu,LIANG Jun,HAN Xueshan,et al.Reactive power and voltage control strategy for wind farm based on STATCOM[J]. Proceedings of the CSEE,2010,30(25):23-28.
[15]王锡凡,卫晓辉,王秀丽,等.海上风电并网与输送方案比较[J].中国电机工程学报,2014,34(31):5459-5466.WANG Xifan,WEI Xiaohui,WANG Xiuli,et al. Integration techniques and transmission schemes for offshore wind farms[J]. Proceedings of the CSEE,2014,34(31):5459-5466.