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新能源电力系统国家重点实验室(华北电力大学),北京市 102206
Received:26 April 2021,
Revised:2021-08-25,
Published Online:26 September 2021,
Published:10 November 2021
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夏嘉航,王晨欣,展瑞琦等.基于电流源换流器的混合型海上风电直流输电系统[J].电力系统自动化,2021,45(21):129-138.
XIA Jiahang,WANG Chenxin,ZHAN Ruiqi,et al.Hybrid DC Transmission System for Offshore Wind Power Based on Current Source Converter[J].Automation of Electric Power Systems,2021,45(21):129-138.
夏嘉航,王晨欣,展瑞琦等.基于电流源换流器的混合型海上风电直流输电系统[J].电力系统自动化,2021,45(21):129-138. DOI: 10.7500/AEPS20210426004.
XIA Jiahang,WANG Chenxin,ZHAN Ruiqi,et al.Hybrid DC Transmission System for Offshore Wind Power Based on Current Source Converter[J].Automation of Electric Power Systems,2021,45(21):129-138. DOI: 10.7500/AEPS20210426004.
基于二极管整流器(DR)的海上风电并网方案能大幅降低投资成本,但其控制和启动问题难以解决。主动换相型电流源换流器(CSC)具有较高的功率密度和较强的控制性能,但成本相对较高。文中提出一种基于DR与辅助CSC混合级联的海上风电直流输电并网系统,既能实现海上平台轻型化,又能解决DR的控制和启动问题。首先,对拓扑结构和数学模型进行分析;然后,提出海上风电并网系统的稳态控制策略和黑启动控制策略,并基于PSCAD/EMTDC进行仿真验证;最后,对所提方案进行经济性分析。结果表明
混合级联型海上风电并网系统能平稳完成风电场黑启动,具有良好的稳态特性,并能适应风电出力的波动。
The offshore wind power grid-connected scheme based on diode rectifier (DR) can greatly reduce the investment cost
but the problems of control and start-up are difficult to be solved. The actively commutated current source converter (CSC) has high power density and great control performance
but its cost is relatively high. This paper proposes a hybrid cascaded DC grid-connected transmission system for offshore wind power based on DR and auxiliary CSC
which can realize the miniaturization of offshore platform and solve the problems of control and start-up. First
the topology and mathematical model are analyzed. Then
the steady-state control strategy and black start control strategy are proposed for the offshore wind grid-connected system
and the simulation verification is performed based on PSCAD/EMTDC. Finally
the economic analysis of the proposed scheme is carried out. The results show that the hybrid cascaded offshore wind grid-connected system can smoothly complete the black start of wind farms
has good steady-state characteristics
and can adapt to the fluctuations of wind power output.
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