电源学报2024，Vol.22Issue(2)：263-272,10.DOI:10.13234/j.issn.2095-2805.2024.2.263
海上风场混合直流送出系统停机策略研究
Shutdown Strategy for Hybrid DC Transmission System in Offshore Wind Farm
摘要
Abstract
A shutdown strategy for a low-cost hybrid DC converter based on diode rectifier is studied.The shut-down process of the auxiliary converter is divided into an energy feedback stage and an energy dissipation stage.At the energy feedback stage,part of the energy stored in the capacitors of sub-modules is fed back to grid through the DC transmission line under the active control.At the energy dissipation stage,the resonant capacitor and the capacitors of sub-modules are discharged in sequence through a discharging resistor.The calculation methods for the discharging cur-rent,capacitance voltage,and discharging time are derived,and the design method for the discharging resistor is also given.The capacitors of the auxiliary converter can be discharged quickly and efficiently under the proposed shutdown strategy without a high-voltage and large-capacity discharging resistor,which is conducive to the realization in engineer-ing projects.Finally,a simulation model is constructed in Matlab/Simulink,and the validity of the shutdown strategy is verified by simulation results.关键词
二极管整流器/混合直流换流器/放电过程/停机策略/柔性直流输电Key words
Diode rectifier/hybrid DC converter/discharge process/shutdown strategy/VSC-HVDC分类
信息技术与安全科学引用本文复制引用
方陈,魏新迟,时珊珊,杨建平,蔡旭,方梓熙..海上风场混合直流送出系统停机策略研究[J].电源学报,2024,22(2):263-272,10.基金项目
国家电网公司总部科技资助项目(520940200010)This work is supported by the Science and Technology Project of State Grid Corporation under the grant 520940200010 （520940200010）
