抽水蓄能电机稳态电抗的有限元计算及影响因素分析  

Finite Element Calculation and Analysis of Influence Factors for the Steady-State Reactance of Pumped Storage Machine

作　　者：王伟华[1] 王红宇[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《大电机技术》2013年第6期11-15,19,共6页Large Electric Machine and Hydraulic Turbine

基　　金：国家科技支撑计划项目:大型抽水蓄能机组发电电动机的机网协调运行研究(2011BAF03B02)

摘　　要：为研究抽水蓄能电机稳态电抗受铁心饱和的影响,本文基于单元电机建立了抽水蓄能电机的场路耦合时步有限元模型。采用时域法计算得到电机在发电及电动稳态工况时,转子转动一周时电抗的变化曲线及场图,进而得到相应的稳态电抗。同时采用频域法计算得到了稳态电抗。时域法计算值、频域法计算值、设计值在额定工况基本一致;然后采用时域法和频域法计算比较不同负载和不同功率因数时两种工况下的饱和同步电抗,分析其变化规律,为电磁设计提供了理论依据。In order to study the effects of core saturation to steady reactance of pumped storage motor, the field-circuit coupled time-stepping fmite element （FEM） model which is based on unit machine is builded in this paper. The reactance curve and field figure and the steady state reactance in generator and motor working conditions are obtained by time domain method. Simultaneously, the steady state reactance is calculated by frequency domain method. The calculated values of time domain method and frequency domain method and the design are basically the same in the rated operating conditions. And then, the saturated synchronous reactances in different load and power factor of two conditions are calculated by the two methods. Analysis the regularity, and thus provides a theoretical basis for electromagnetic design.

关 键 词：抽水蓄能电机 同步电抗 场路耦合 时步有限元 

分 类 号：TM312[电气工程—电机]