中国电力2026，Vol.59Issue(1)：143-152,10.DOI:10.11930/j.issn.1004-9649.202501008
基于LLC谐振型变换器的海上直流风电机组电压源等效模型
Voltage source equivalent model of offshore direct current wind turbine based on LLC resonant converter
摘要
Abstract
Offshore wind farms adopting a DC collection scheme can avoid overvoltage problems caused by the capacitive charging effect of undersea cables,and also eliminate the need for bulky power-frequency transformers,representing an important direction for future development.This paper firstly establishes a detailed model of an offshore direct current(DC)wind turbine based on the LLC resonant converter and designs an integrated control strategy for the turbine unit.Then,based on the averaging model and the operating principles of the LLC resonant converter,the detailed model is simplified to obtain an equivalent voltage source model.Finally,a com-parative analysis of the dynamic characteristics is conducted under various operating conditions among the equivalent voltage source model,the detailed model,and the existing current source equivalent model established in previous studies,verifying the accuracy of the former.The established model holds practical reference value for conducting stability analysis on the integration of offshore DC wind farms into the main power grid.关键词
直流汇集/LLC谐振型变换器/直流风电机组/控制策略/电压源等效模型Key words
DC collection/LLC resonant converter/DC wind power turbines/control strategy/voltage source equivalent model引用本文复制引用
NING Yujie,HU Shuju,CHEN Yijing,LI Chunhua,LI Fenglin,ZHAO Dawei..基于LLC谐振型变换器的海上直流风电机组电压源等效模型[J].中国电力,2026,59(1):143-152,10.基金项目
This work is supported by the National Key R&D Program of China(Key Technologies and Demonstration Applications of DC Collection in Offshore Wind Farms,No.2023YFB4204700). 国家重点研发计划资助项目(海上风电场直流集电关键技术及应用示范,2023YFB4204700). （Key Technologies and Demonstration Applications of DC Collection in Offshore Wind Farms,No.2023YFB4204700）
