双馈式变速抽水蓄能电厂的机电暂态建模及模型预测控制

Electromechanical Transient Modeling and Model Predictive Control of Doubly-fed Variable-speed Pumped Storage Power Plant

目前双馈式变速抽水蓄能电厂(doubly-fedinductionmachinebasedvariable-speedpumpedstorage,DFIM-VSPS)的研发仍处于起步阶段,其系统建模、稳定性分析及控制需要进一步研究。为此,研究了DFIM-VSPS的机电暂态模型,考虑了机组变速运行对效率的影响,并对比了采用不同水动态模型时DFIM-VSPS模型的动态响应,提出将模型预测控制用于DFIM-VSPS的功率控制,并且研究了各个工况下模型预测控制的控制效果及延时对控制效果的影响。结果表明:与常规控制相比,模型预测控制在系统发生大扰动及平抑风电功率波动时具有更好的控制性能,并且具有较好的鲁棒性。研究可为DFIM-VSPS的控制提供一定的参考。

At present,the research and development of doubly-fed induction machine based variable-speed pumped storage(DFIM-VSPS)are still in its infancy,and its system modeling,stability analysis and control are worthy of further study.Therefore,the electromechanical transient model of DFIM-VSPS is studied is this paper.The influence of variable-speed operation on efficiency is taken into consideration,and the dynamic response of DFIM-VSPS model is compared under different water dynamic models.Model predictive control(MPC)is proposed for power control of DFIM-VSPS,and the control effect of MPC under various working conditions,as well as the influence of delay on control effect,is studied.The results show that,compared with conventional control,MPC has better control performance and good robustness in the scenarios of large disturbances and fluctuation smoothing of wind power.The research can provide a certain reference for the control of DFIM-VSPS.