变速恒频双馈发电机空载并网及发电运行控制

Variable Speed Constant Frequency Doubly-fed Generator No-load Grid Connection and Power Generation Operation Control

根据变速恒频发电机运行特点,采用定子磁链定向矢量控制策略,建立双馈发电机空载并网及发电运行数学模型,设计双馈发电机并网发电运行控制系统,并给出仿真搭建过程。从空载并网前发电机定子电压对电网电压的跟踪、并网时控制策略的切换、并网后最大风能追踪进行全面的仿真。样机试验结果表明空载并网控制策略能够实现变速恒频发电机柔性并网,并网之后能够实现功率追逐控制。

According to the operating characteristics of the variable-speed constant-frequency generator,the stator flux linkage vector control strategy was adopted to establish the mathematical model of the no-load generator grid connection and power generation operation,and the doubly-fed generator grid-connected power generation operation control system was designed and simulated.From the no-load grid connection,the generator stator voltage is tracked to the grid voltage,the control strategy is switched during grid connection,and the maximum wind energy tracking after grid-connected,that is fully simulated.The prototype test results show that the no-load grid-connected control strategy can realize the flexible grid connection of the variable-speed constant-frequency generator,and the power chasing control can be realized after the grid connection.