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中文摘要：
针对分散式小型风力发电场,实现永磁风电机组直流并联,提出了永磁风力发电机PWM整流器直流侧并联 的结构.为了能使小型风电场,就近接入大型风电场或者并入电网时,降低传输过程中输电损耗的目的,采用了DC-DC升压组将直流母线电压升高的拓扑结构.为能够有效地实现发电机的并、切网,设计了对发电机输出电压瞬时采 样,来判断发电机整流器侧是否连接到直流母线的断路器模型.基于Matlab/Si腿link仿真平台搭建了含3台永磁风 力发电机、整流器、断路器和DC-DC升压组的仿真模型,对永磁风力发电机在不同风速下的直流并联与升压进行了 仿真分析.仿真结果表明,在理想状态下,该模型可实现不同风速下风力发电机的直流并联与升压.
英文摘要：
Aiming at the scattered small wind power fields which realize the DC parallel connection of direct - driven wind tur-bine with permanent magnet synchronous generator （PMSG） , the mathematical model is established that the connection of PWM rectifier of PMSG is parallel in DC side. In order to make small wind farm integrated with the nearest large wind farm or power grid and reduce the transmission loss in the process of more than ten kilometers far from the power grid, DC - DC chop-per is used to rise the voltage of DC bus. In order to effectively realize the integration and cut off of generators, the instantane-ous sampling of output voltage of wind turbine generator is designed to judge whether the rectifier side of wind turbine generator is connected to the short - circuit model of DC bus or not. Based on Matlab/Simulink simulation platform, the simulation mod-el including three direct - driven wind turbines with PMSG, rectifier, circuit breaker and DC - DC boost group is established, and the simulation of DC in parallel and DC - DC boost under different wind speeds is analyzed. The simulation results show that the proposed model can realize DC in parallel and DC - DC boost of wind turbine generator under different wind speeds in the ideal condition.
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