中国电机工程学报Issue(33)：5941-5947,7.DOI:10.13334/j.0258-8013.pcsee.2014.33.018
计及双因素非线性影响的汽轮发电机同步电抗的计算方法
A Calculation Method for Synchronous Reactances of Turbine Generators Considering Two Factors Affecting Nonlinear Characteristics
摘要
Abstract
The relationship between air-gap EMF and resultant MMF of turbine generators under different operating conditions is a series of curves which have the prominent difference from no-load characteristic. The difference is caused by interaction of two factors, i.e. iron saturation and magnetic field distortion nonlinearity. The features of stator inductances considering two factors varied with rotor angles are studied with the finite element method under different power angles. The difference between the calculated inductances and the unsaturated values is compared and analyzed. A method of calculating synchronous reactances is presented by solving characteristic values of stator inductances matrix value. The method can consider not only two factors and rotor movement but also features of the stator inductances. The calculated synchronous reactances are smaller than values given by factories. The case study of stator current calculation shows that the calculated results with synchronous reactances considering two factors are closer than the results using the finite element method.关键词
汽轮发电机/同步电抗/双因素/非线性/定子电感系数Key words
turbine generator/synchronous reactances/two factors/nonlinear/stator winding inductances分类
信息技术与安全科学引用本文复制引用
康锦萍,徐英辉,刘晓芳,杨娅萍,罗应立..计及双因素非线性影响的汽轮发电机同步电抗的计算方法[J].中国电机工程学报,2014,(33):5941-5947,7.基金项目
国家自然科学基金项目(51307049)。Project Supported by National Natural Science Foundation of China (51307049) （51307049）
