变速运行双绕组感应发电系统混合励磁的研究

Research on the Hybrid Excitation of Variable Speed Dual Stator-winding Induction Generator System

双绕组感应发电机的无功功率是由功率绕组侧的励磁电容和控制绕组侧的PWM静止变换器混合励磁提供的,励磁电容的大小会对控制绕组励磁变换器的容量产生影响,在不同转速、不同负载下分别进行了试验,研究了其影响规律。结果表明,在给定转速范围内,励磁电容的增大有利于减小额定负载运行时控制绕组的容性电流,不利于降低空载运行的控制绕组感性电流。

The reactive power of dual stator-winding induction generator is dependent on the hybrid excitation between excited capacitor of power winding and excited converter of control winding.Excited capacitor has influence on the capacitance of excited converter.The experiments indicate the influence on the capacity of excited converter by variable excited capacitor under variable speed and variable load.The results show that the increasing of excited capacitor has advantages to reduce the capacitive current of control winding under rated-load and disvantages to reduce the inductive current under no-load.