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1.上海电力大学电气工程学院,上海市 200090
2.教育部海上风电技术工程研究中心(上海电力大学),上海市 200090
Received:26 September 2024,
Revised:2025-01-15,
Online First:09 December 2025,
Published:25 February 2026
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黄宝龙,赵晋斌,毛玲等.基于DRU-HVDC送出系统的海上风电惯量支撑协调控制[J].电力系统自动化,2026,50(4):46-55.
HUANG Baolong,ZHAO Jinbin,MAO Ling,et al.Coordinated Control of Inertia Support for Offshore Wind Power Based on DRU-HVDC Transmission System[J].Automation of Electric Power Systems,2026,50(4):46-55.
黄宝龙,赵晋斌,毛玲等.基于DRU-HVDC送出系统的海上风电惯量支撑协调控制[J].电力系统自动化,2026,50(4):46-55. DOI: 10.7500/AEPS20240926011.
HUANG Baolong,ZHAO Jinbin,MAO Ling,et al.Coordinated Control of Inertia Support for Offshore Wind Power Based on DRU-HVDC Transmission System[J].Automation of Electric Power Systems,2026,50(4):46-55. DOI: 10.7500/AEPS20240926011.
大规模海上风电场经二极管整流单元(DRU)的高压直流(HVDC)系统送出方案在经济技术方面具有显著优势。然而,深远海风电场因长距离通信设备成本以及通信延时的影响,难以及时获取受端电网频率变化信息并提供惯量支撑。因此,提出一种基于DRU换流站运行特性的快速低延时频率映射-还原方法,协调控制直流电容储能-风机转子动能参与惯量响应。首先,文中介绍了海上风电场经DRU-HVDC送出系统拓扑结构和稳态运行特性。然后,受端换流站采用虚拟惯量控制方式,将电网频率变化映射为直流电压变化,同时阐明DRU换流站运行时海上交流侧与直流侧电气量间耦合特性,风机仅需本地检测电压幅值和功率来还原电网频率信息,并依据还原后的频率信息依次协调控制释放直流电容能量-风机转子动能。最后,在PSCAD/EMTDC环境中搭建了海上风电场经DRU-HVDC送出系统的仿真模型,仿真结果验证了所提出的频率映射-还原方法和惯量响应协调控制方法的可行性,降低通信延时对系统惯量响应速度的影响,提升受端电网惯性水平。
The high-voltage direct current (HVDC) system transmission scheme for large-scale offshore wind farms through diode rectifier units (DRUs) has significant advantages in economic and technological aspects. However
it is difficult for deep and remote offshore wind farms to timely obtain the frequency change information of the power grid at the receiving end and provide inertia support due to the cost of long-distance communication equipment and the influence of communication delay. Therefore
this paper proposes a fast and low-delay frequency mapping-restoration method based on the operation characteristics of DRU converter station
which coordinately controls DC capacitor energy storage-wind turbine rotor kinetic energy to participate in the inertia response. First
the topology and steady-state operation characteristics of the offshore wind farm via DRU-HVDC transmission system are introduced. Then
the virtual inertia control method is adopted in the converter station at the receiving end
which maps the grid frequency change into DC voltage change. At the same time
the coupling characteristics between the offshore AC-side and DC-side electrical variables are clarified during the operation of the DRU converter station The wind turbine only needs to locally detect the voltage amplitude and power to restore the grid frequency information
and then coordinately controls to release DC capacitor energy and wind turbine rotor kinetic energy based on the restored frequency information. Finally
the simulation model of offshore wind farm via DRU-HVDC transmission system is built in PSCAD/EMTDC environment
and the simulation results verify the feasibility of the proposed frequency mapping-restoration method and inertia response coordinated control method
which reduces the effect of communication delay on the system inertia response speed and improves the inertia level of the power grid at the receiving end.
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