电力建设2026，Vol.47Issue(2)：14-27,14.DOI:10.12204/j.issn.1000-7229.2026.02.002
风电接入真双极柔直系统的送端换流器协调控制策略
Coordinated Control Strategy for Sending-End Converters in Wind-Integrated Real Bipolar MMC-HVDC Systems
摘要
Abstract
[Objective]Modular multilevel converter based high voltage direct current(MMC-HVDC)technology with a real bipolar connection is one of the mainstream technical solutions for efficient grid connection and cross-regional consumption of large-scale islanded wind farms.It has been widely adopted in HVDC projects such as Zhangbei and Rudong in Jiangsu.However,the control strategy for the sending-end positive and negative pole converters faces the dual challenge of balancing bipolar transmission power and providing stable voltage support for the wind farm.To address this,a grid-forming coordinated control strategy for bipolar converters is proposed,which combines an active power-frequency boost scheme with a reactive power-voltage droop scheme.[Methods]The coupling mechanism among active power,phase,and frequency at the sending-end bipolar converters is analyzed.An active power-frequency boost control strategy is established,clarifying the power balance and frequency coordination of bipolar converter under wind power fluctuation and the adaptive regulation mechanism under capacity-limited conditions.The coupling relationship between the voltage and reactive power of the sending end converters and wind farm is revealed.A reactive power-voltage droop control strategy with capacity and active power constraints is established.The coordinated stability mechanism of AC bus voltage under reactive power fluctuation is investigated.[Results]Simulation results demonstrate that the proposed strategy can effectively maintain dynamic power balance between the bipolar converters and provide stable voltage and frequency support for the AC system under various conditions,including system power fluctuations and single-pole capacity limitations.[Conclusions]The grid-forming coordinated control strategy proposed can effectively address the core challenges of power balance and voltage and frequency support for the sending-end bipolar converters in islanded wind farm MMC-HVDC systems under complex operating conditions,thereby improving the operation stability of the system.关键词
孤岛风电场/柔性直流输电系统(MMC-HVDC)/送端双极换流器/有功功率-频率上升控制/无功功率-电压下垂控制/协调控制策略Key words
islanded wind farm/modular multilevel converter based high voltage direct current(MMC-HVDC)/sending-end bipolar converters/active power-frequency rise control/reactive power-voltage droop control/coordinated control strategy分类
信息技术与安全科学引用本文复制引用
李博通,吝梦媛,郑光辉,董岳金,刘轶超..风电接入真双极柔直系统的送端换流器协调控制策略[J].电力建设,2026,47(2):14-27,14.基金项目
国家自然科学基金项目(U2166205) This work is supported by National Natural Science Foundation of China(No.U2166205). （U2166205）
