面向新能源场站的分布式调相机励磁配置与控制优化

为解决新能源场站的暂态过电压问题,越来越多的新型分布式调相机被应用于工程现场,励磁系统作为调相机启动和运行的重要组成部分,往往也是系统设计时所考虑的重中之重。针对分布式调相机本身容量小、惰速快等特点,本文提出了综合励磁的硬件配置方式,即使用一套功率柜完成启动、升压并网及运行的全工况任务;同时为增加调相机启动并网的可靠性和快速性,提出了变参数运行和不停机快速升压并网的励磁优化控制策略,并针对性地介绍了与之适配的对外接口、控制流程等。搭建了10Mvar调相机启动系统动模试验平台并进行了功能测试,验证了综合励磁配置和控制优化方法的有效性和优越性。目前,采用本文所述方法研制的综合励磁系统已在10Mvar调相机工程现场成功应用并稳定运行。

The analysis of the line-start permanent magnetic synchronous motor basing on the FEM

In this article, the 2D transient FEM has been used to analyze the dynamic process of the three phase LS-PMSM running characteristic. By verifying it through the experiment, we obtain the conclusion that the simulation result is consistent with the experiment result. At the same time, by analyzing the situation of the magnetic bridge, we also obtain the result that the EMF waves are changing with the situation of the magnetic poles on and we can optimize the motor’s structure at the same time.