基于无刷双馈发电机的船舶独立发电系统励磁控制和性能分析

Excitation Control and Performance Analysis for BDFIG-Based Ship Stand-Alone Power Generation System

无刷双馈感应发电机是一种新型的电机,被广泛应用于一些变速恒频的发电系统。介绍了一种基于绕线转子无刷双馈发电机的船舶轴带独立发电系统的控制方法。这种控制方法能够在不需要电机参数的情况下实现对无刷双馈发电机的输出电压和频率的控制,同时能够消除原动机转速变化和负载变化带来的影响。在处理无刷双馈发电机独立发电系统的控制问题时,面临的主要困难是这种电机内部复杂的结构。为了克服这些问题,对独立运行的无刷双馈发电机的数学模型、功率流动和运行性能进行了完整的推导和分析。无刷双馈发电机独立发电系统的实验验证是在一台2/6极250机座号的绕线转子无刷双馈发电机上进行的。

Brushless doubly-fed induction generator（ BDFIG） is a novel type electrical machine,which has widely applied in some variable speed constant frequency（ VSCF） generation systems. Based on its features,an excitation control strategy for the stand-alone BDFIG based on ship shaft generator was introduced. The control scheme can be implemented without the parameters of BDFIG and was able to maintain constant voltage and frequency at the output of the BDFIG,the prime mover speed and load condition variation can be eliminated by this control scheme. The main difficulty when working with BDFIG is its inherent complexity. To overcome this problem,the mathematical description,power flow and performance evaluation of the stand-alone BDFIG was comprehensively developed and analyzed. The experiments were carried out on a 2 /6-pole 250-frame-size wound rotor BDFIG.