【摘要】 随着构网型直驱风机（GFM-PMSG）在风场中的逐步应用，混合型风场通过电网换相高压直流输电（LCC-HVDC）产生的换相失败问题，使得系统暂态稳定性面临严峻挑战。首先分析了暂态过电压发生机理，并研究了GFM-PMSG控制参数、电网强度对过电压的影响；然后提出了一种协同控制策略，通过优化GFM-PMSG与跟网型直驱风机（GFL-PMSG）在故障穿越期间的无功电流指令及其切换阀值，有效抑制了暂态峰值过电压，最后，基于PSCAD/EMTDC仿真平台搭建混合风场经直流外送仿真模型，验证了该策略的有效性。更多还原

【Abstract】 With the gradual application of grid forming permanent magnet synchronous generator(GFM-PMSG)in wind farms,the commutation failure in hybrid wind farms through LCC-HVDC transmission poses a serious challenge to the system transient stability.Firstly, the mechanism of transient overvoltage is analyzed and the influence of GFM-PMSG control parameters and grid strength on overvoltage is explored;Then,a collaborative control strategy is proposed to effectively suppress transient peak overvoltage by optimizing the reactive current command and switching threshold of GFM-PMSG and grid following permanent magnet synchronous generator(GFL-PMSG)during fault crossing. Finally,a hybrid wind farm DC transmission simulation model is built based on PSCAD/EMTDC simulation platform to verify the effectiveness of the strategy.更多还原