带整流桥负载的双绕组异步发电机励磁控制方法研究  

Research on Excitation of a Dual Stator Winding Induction Generator with a Three-phase Bridge Uncontrolled Rectifier

作　　者：贾继承[1] 马伟明[1] 刘德志[1] 

机构地区：[1]海军工程大学电力电子技术应用研究所,湖北武汉430033

出　　处：《电源技术应用》2003年第9期1-5,共5页Power Supply Technologles and Applications

摘　　要：针对双绕组异步发电机所带不可控整流桥直流侧电压的稳定问题,提出了一种在控制绕组侧补偿异步发电机所需无功励磁电流的新方法。该方法通过锁相环(PLL)检测出控制绕组中基波电压相位并超前90°作为实际应补偿的励磁无功电流的相位,再根据检测出的功率绕组整流桥直流侧的实际电压与参考电压作比较后,经PI调节确定静止无功发生器(SVG)发出的励磁电流的幅值大小,实现在负载变化时,对控制绕组中所需的励磁电流的大小和频率进行连续调节,达到稳定直流侧电压的目的。To counter the stability of the DC-side voltage of a three-phase bridge uncontrolled rectifier by a dual stator winding induction generator, a novel method for compensating the exciting current in the control winding is proposed. The desirable phase of the compensating current equals ninety degrees plus the phase that is got by means of a phase locked loop tracking the phase of the first harmonic of the control winding voltage. The amplitude of the desirable wattless current that should be generated by a static var generator in got by means of a PI adjuster adjusting the deviation between the desirable voltage and the three-phase bridge uncontrolled rectifier DC-side actual volatage in the power winding. Thus when the load varies, the frequency and amplitude of the desirable exciting current is adjusted continuously and the DC voltage becomes stationary. The validity of the proposed method is demonstrated by comparison to the results of experiment and simulation.

关 键 词：双绕组异步发电机 锁相环 静止无功发生器 

分 类 号：TP921.45[自动化与计算机技术]