基于设备级与场站级协同优化的直驱永磁同步风电机组并网振荡稳定控制

Existing sub-/super-synchronous oscillation stability control methods are primarily focused on specific operating con-ditions at discrete frequencies,limiting their adaptation to vary-ing oscillation scenarios in the power system connected with di-rect-drive permanent magnet synchronous generator(PMSG)-based wind farms.Based on supplementary dissipation compen-sation,this paper proposes an oscillation stability control meth-od incorporating equipment-level and farm-level cooperative op-timization to enhance the system-level stability.First,the effects of dynamic self-dissipation and dynamic coupled dissipation on system stability are analyzed,establishing the foundational prin-ciple of supplementary dissipation compensation.Subsequently,the optimal locations for supplementary dissipation compensa-tion are identified based on critical control designed to enhance the dynamic self-dissipation effect and suppress the dynamic coupled dissipation effect.Furthermore,by considering energy requirements under the combined wind farm-grid interaction and inter-PMSG interactions and balancing the wind farm-grid interaction dissipation energy with inter-PMSG interaction dissi-pation energy distribution,an equipment-level control parame-ter optimization algorithm and a farm-level power cooperative optimization algorithm are established.Finally,the simulation results demonstrate that dynamic coupled dissipation consti-tutes the root cause of oscillation inception and progression.Through equipment-level and farm-level cooperative optimiza-tion,the proposed method can reliably compensate dynamic dis-sipation energy,while adapting to the variation of oscillation frequency and the oscillation scenario.It can maximize the en-ergy dissipation effect of the interconnected system,achieving rapid suppression of sub-/super-synchronous oscillations.