摘要
针对双馈机组高电压穿越问题,为抑制直流母线电压波动,采用蓄电池-超级电容混合储能的拓扑结构,研究了储能系统协调充放电策略。针对储能系统,提出一种自动识别和切换的四种充放电工作模式。网侧变流器传统控制忽略了转子电流对直流母线的冲击,文章提出了前馈补偿来优化有功电流的参考值。转子侧变流器传统控制忽略了定子磁链对有功和无功功率的影响,文中提出了对功率外环增加前馈补偿,分量来优化控制。MATLAB/Simulink中分别建立传统控制策略和改进控制策略两种模型,在相同的工况下,仿真结果表明所述方法在电网故障时,能更有效地抑制直流母线过电压,有效提升了高电压穿越能力。
Aiming at the problem of high voltage ride through(HVRT)of doubly-fed units,in order to suppress the fluctuation of DC bus voltage,the coordinated charging and discharging strategy of energy storage system is studied through using the topology of battery-supercapacitor hybrid energy storage.Aiming at energy storage system,four working modes are proposed based on charging and discharging mode with automatic identification and switching.The traditional control of grid-side converter neglects the impact of rotor current on DC bus.Feed-forward compensation is proposed to optimize the reference value of active current.Traditional control of rotor-side converter neglects the influence of stator flux on active and reactive power.It is proposed to optimize the control by adding feed-forward compensation component to the outer power loop.In MATLAB/Simulink,two models of traditional control strategy and improved control strategy are established respectively.Under the same working conditions,simulation results show that the proposed method can effectively suppress DC bus voltage and effectively improve the high voltage ride through ability when the power grid fails.
作者
蒋子傲
崔双喜
Jiang Ziao;Cui Shuangxi(School of Electrical Engineering,Xinjiang University,Urumqi 830047,China)
出处
《电测与仪表》
北大核心
2022年第3期125-130,共6页
Electrical Measurement & Instrumentation
基金
国家自然科学基金资助项目(51767024)
新疆大学自然科学基金资助项目(BS160246)。
关键词
双馈感应发电机组
高电压穿越
混合储能
改进控制策略
doubly fed induction generator
high voltage ride through
hybrid energy storage
improved control strategy
