磁场饱和与畸变对发电机电感参数计算的影响

为了提高发电机故障检测的灵敏性,需要准确计算发电机电感参数.考虑发电机负载运行时磁路的饱和与位置的畸变,分别应用磁路法和磁场法计算了不同饱和程度与畸变程度下的电感参数,讨论了磁路饱和与磁场畸变对电感参数的影响,指出磁路法计算电感参数的局限性.对一台一对极隐极式发电机样机进行的不同工况下转子匝间短路实验表明：磁场法可以充分考虑物理情况,参数计算结果更加准确.在要求准确计算电感参数的场合使用磁场法更合适.

Influence of magnetic saturation and distortion on generator inductance parameters

In order to promote the sensitivity of the generator faults monitoring,it is necessary to calculate parameters of generators accurately. When generators operate under load condition,magnetic saturation and magnetic distortion will occur in the generator magnetic field. Using magnetic method and magnetic circuit method,this paper calculates inductance parameters under different level of magnetic saturation and magnetic distortion,analyses the influence of these changes of magnetic field to inductance parameters and points out the limitation of magnetic circuit method. In this paper,experiments about rotor interturn short circuit will be carried out in different operation,with a one-pole-pair generator. A comparison between experimental results and simulation results verifies that magnetic method can adequately considerate physics environment and calculate parameters accurately. Magnetic method will be a good choice under the situation requiring accurate calculation.