电力建设2024，Vol.45Issue(2)：10-25,16.DOI:10.12204/j.issn.1000-7229.2024.02.002
直驱风电场经柔直送出系统近工频正/负序振荡机理分析
Mechanism Analysis of Near Fundamental-Frequency Positive/Negative-Sequence Oscillations in MMC-HVDC Connected Direct-Drive Wind Farm
摘要
Abstract
Positive-and negative-sequence oscillation phenomena close to the fundamental frequency(40-60 Hz)occur in a practical modular multilevel converter-based high-voltage DC(MMC-HVDC)transmission system for new energy integration,which has led to a decrease in the power output of new energy sources.The mechanism of near-fundamental-frequency oscillations is more complex and has more influencing factors than oscillations in other frequency bands.This study focuses on the near-fundamental-frequency oscillation stability of an MMC-HVDC-connected direct-drive wind farm.Refined impedance models of the direct-drive wind turbine and sending-end MMC are established by considering positive and negative sequence controls.Based on the established impedance models,the mechanisms of the near-fundamental-frequency positive-and negative-sequence oscillations between the direct-drive wind farm and the sending-end MMC are revealed.In addition,the parameter phase-margin sensitivity is defined,and the key influencing factors of the near-fundamental-frequency oscillation stability of the interconnected system were analyzed quantitatively.Finally,an electromagnetic transient simulation model of the MMC-HVDC-connected direct-drive wind farm is developed.The near-fundamental-frequency positive-and negative-sequence oscillation phenomena in the actual project are reproduced,and the correctness of the near-fundamental-frequency oscillation mechanism analysis is validated.关键词
风电场/柔性直流输电/近工频振荡/负序控制/负序振荡/灵敏度Key words
wind farm/flexible DC transmission/near-fundamental-frequency oscillation/negative-sequence control/negative-sequence oscillation/sensitivity分类
信息技术与安全科学引用本文复制引用
于婧,林鸿飞,王潇,吕敬,吴林林,李蕴红..直驱风电场经柔直送出系统近工频正/负序振荡机理分析[J].电力建设,2024,45(2):10-25,16.基金项目
This work is supported by National Natural Science Foundation of China(No.52277195)and North China Electric Power Research Institute Co.,Ltd.(No.KJZ2022056).国家自然科学基金项目(52277195) （No.52277195）
华北电力科学研究院有限责任公司资助项目(KJZ2022056) （KJZ2022056）
