电力系统自动化2024，Vol.48Issue(16)：142-153,12.DOI:10.7500/AEPS20231118001
具备黑启动和构网能力的远海风电经DRU-MMC送出方案
Remote Offshore Wind Power Transmission Scheme Based on Diode Rectifier Unit and Modular Multilevel Converter with Black-start and Grid-forming Capability
摘要
Abstract
Due to the characteristics of low cost,small size and weight,and high reliability,the transmission scheme using the diode rectifier unit(DRU)at the sending end and the modular multilevel converter(MMC)at the receiving end has attracted much attention in the field of offshore wind power transmission.Since DRU cannot form an AC power grid and provide reverse active power,this paper proposes a remote offshore wind power transmission scheme based on DRU-MMC with black-start and grid-forming capability.The proposed scheme adds conventional small-capacity voltage-source auxiliary converters,energy-dissipating units,and necessary fast switches on the basis of DRU-MMC transmission technology.With the multiplexing of DC marine cables and the topology reconstruction by the fast switch switching operations,the low-voltage circuit for the black-start power supply and the high-voltage circuit for wind power transmission are constructed respectively,and the online-switching between the black-start condition and the power transmission condition is realized.The grid-forming control strategies of the auxiliary converter in different operation stages are proposed to solve the formation of the offshore AC power grid,the reactive power compensation and harmonics suppression of the DRU.Moreover,the restriction of the DRU-MMC transmission scheme on the type of wind farm is eliminated by the proposed scheme.Finally,the superiority and the effectiveness of the proposed scheme are verified by means of economic analysis and case simulation.关键词
远海风电/黑启动/构网型控制/二极管整流器/模块化多电平换流器/拓扑重构Key words
remote offshore wind power/black start/grid-forming control/diode rectifier unit(DRU)/modular multilevel converter(MMC)/topology reconstruction引用本文复制引用
谢晔源,袁庆伟,段军,姜田贵..具备黑启动和构网能力的远海风电经DRU-MMC送出方案[J].电力系统自动化,2024,48(16):142-153,12.基金项目
国家重点研发计划资助项目(2021YFB2401100) （2021YFB2401100）
已申请国家发明专利(申请号:ZL202210263109.9). This work is supported by National Key R&D Program of China(No.2021YFB2401100). （申请号:ZL202210263109.9）
