适应频率变化的双馈风电机组稳定分析改进模型

发布时间：2018-04-11 23:20

本文选题：双馈风电机组 + 电网频率变化　；参考：《电力系统自动化》2014年21期

【摘要】：为分析变速恒频风电机组在不同电网频率下的稳定性,提出了考虑适应电网频率变化的双馈风电机组小干扰稳定性的电磁暂态模型。首先,分析了双馈感应发电机现有常规电磁暂态模型不含电网频率导数项,不能反映电网频率变化的问题,提出了双馈感应发电机改进转子暂态电动势的表达式,并建立了含变流器控制系统在内的双馈风电机组小信号改进模型。其次,采用特征值方法,对不同电网频率运行下采用改进及常规双馈感应发电机电磁暂态模型时的系统特征值进行计算与稳定性分析。最后,建立考虑电网频率变化的双馈风电系统时域仿真模型,分别对不同电网频率及不同负荷扰动下的风电机组有功功率和转速特性进行仿真。理论分析及仿真结果表明,相对常规电磁暂态模型,所提出的双馈风电机组改进模型对电网频率变化更为敏感,可适应频率变化的双馈风电机组小干扰稳定分析。
[Abstract]:In order to analyze the stability of wind turbine with variable speed and constant frequency under different power network frequencies, an electromagnetic transient model for small disturbance stability of doubly-fed wind turbine is proposed.Firstly, the problem that the conventional electromagnetic transient model of doubly-fed induction generator can not reflect the frequency change of the power network is analyzed, and the expression of improving rotor transient EMF of doubly-fed induction generator is put forward.The small signal improvement model of doubly-fed wind turbine including converter control system is established.Secondly, using eigenvalue method, the system eigenvalues are calculated and analyzed when the improved and conventional doubly-fed induction generators are used in different frequency operation.Finally, the time-domain simulation model of doubly-fed wind power system considering the variation of grid frequency is established, and the characteristics of active power and rotational speed of wind turbine under different frequency and load disturbance are simulated respectively.The theoretical analysis and simulation results show that compared with the conventional electromagnetic transient model, the improved model of doubly-fed wind turbine is more sensitive to the frequency change of power network and can adapt to the small disturbance stability analysis of doubly-fed wind turbine.
【作者单位】：输配电装备及系统安全与新技术国家重点实验室重庆大学;北京电力经济技术研究院;重庆科凯前卫风电设备有限责任公司;
【基金】：国家国际科技合作专项资助项目(2013DFG61520) 国家自然科学基金资助项目(51377184) 中央高校基本科研业务费专项资金资助项目(CDJZR12150074) 重庆市集成示范计划项目(CSTC2013JCSF70003)~~
【分类号】：TM614

【参考文献】