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.
维普
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