摘要
为计算多Y绕组同步电机任意部分Y绕组供电时的瞬态参数,提出多Y绕组同步电机瞬态参数的频域法算法。通过分析全Y或部分Y绕组供电时的派克方程,得到电机等效电路,进而定义单Y与多Y瞬态参数。通过分析各Y绕组空间合成电流矢量,得到定子各相绕组脉振电流的确定方法。此外,给出运算电抗频率特性的拟合方程。以双Y绕组同步电机为例,计算双Y绕组同步电机单Y与双Y瞬态参数,计算结果与实验结果基本吻合。计算结果表明,其单Y自感抗比单Y互感抗大,电抗差随频率增加发生波动变化,瞬态之初差异最大,稳态时差异最小。所提方法可适用于定子含多套非Y型对称绕组同步电机的瞬态参数计算。
In order to calculate the transient parameters of the multiple Y-connected windings synchronous alternator （MYSA） operating with all or some of the Y-connected windings being supplied, a frequency-domain algorithm was proposed. Since the Park equations of MYSA with all supplied or partial supplied Y-connected windings were analyzed, its equivalent circuit was obtained and the single Y transient parameters and the multiple Y transient parameters were defined. Then, the spatial synthetic current vector of each Y winding was analyzed, so the sinusoidal pulsating current of each phase could be determined. Besides, the fitting equations of operational reactance frequency characteristic were also given. To take an instance, the transient parameters of a double Y-connected windings synchronous alternator were calculated. It shows good agreement between the calculated and the experimental results. According to the calculated results, the single Y self-reactance is larger than the single Y mutual-reactance, the difference between them is changing fluctuantly as the frequency is increasing, which is maximum in the initial transient moment, and minimum in the steady state. This method can also adapt to the transient parameters calculation of the synchronous alternator with multiple sets of none Y-connected symmetrical windings.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2013年第6期120-127,17,共8页
Proceedings of the CSEE
关键词
多相电机
同步电机
瞬态电抗
多Y绕组
脉振电流
频率特性
multi-phase alternator
synchronous alternator
transient parameter
multiple Y-connected windings
pulsating current
frequency characteristic
