| 引用本文: | 叶文瑶,张哲任,徐政.基于并联运行柔性直流与DRU直流的深远海风电异构直流送出系统[J].电力自动化设备,2025,45(12):15-22,40. |
| YE Wenyao,ZHANG Zheren,XU Zheng.Heterogeneous DC transmission system for far-offshore wind power based on parallel operation of MMC-HVDC and DRU-HVDC[J].Electric Power Automation Equipment,2025,45(12):15-22,40. |
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| 摘要: |
| 为了结合模块化多电平换流器(MMC)的技术优势和二极管整流单元(DRU)的经济优势，提出一种基于并联运行柔性直流与DRU直流的海上风电异构直流送出方案，用于深远海风电场集群送出。介绍系统构建方案，提出基于有功功率-电压幅值负反馈控制和无功功率-频率正反馈控制的海上MMC换流站控制策略，并进行系统稳定性分析和稳态潮流计算；分析系统在交直流故障下的特性，提出基于直流耗能装置附加直流电流抑制控制的故障处理策略；通过算例仿真验证所提方案和控制策略的有效性。 |
| 关键词: 模块化多电平换流器 二极管整流单元 深远海风电 异构直流送出 稳态运行策略 故障处理策略 |
| DOI：10.16081/j.epae.202511001 |
| 分类号:TM721.1;TM614 |
| 基金项目:国家自然科学基金资助项目(U24B2089) |
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| Heterogeneous DC transmission system for far-offshore wind power based on parallel operation of MMC-HVDC and DRU-HVDC |
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YE Wenyao1, ZHANG Zheren2, XU Zheng2
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1.Polytechnic Institute, Zhejiang University, Hangzhou 310015, China;2.College of Electrical Engineering, Zhejiang University, Hangzhou 310027, China
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| Abstract: |
| To combine the technical advantages of modular multilevel converter(MMC) and the economic benefits of diode rectifier unit(DRU),a heterogeneous DC transmission scheme based on the parallel operation of MMC-HVDC and DRU-HVDC is proposed for the power transmission of far-offshore wind farm clusters. The system configuration scheme is introduced, the control strategy of offshore MMC converter station based on active power-voltage amplitude negative feedback and reactive power-frequency positive feedback is proposed, and the system stability analysis and steady-state power flow calculation are conducted. The characteristics of the system under AC and DC faults are analyzed, and then the fault handling strategy based on the DC chopper plus with DC current suppression control is proposed. The effectiveness of the proposed scheme and control strategy is verified through simulation examples. |
| Key words: MMC DRU far-offshore wind power heterogeneous DC transmission steady-state operation strategy fault handling strategy |
