摘要
利用稳态有限元模型分析同步发电机磁场后,要涉及依靠经验选择的计算参数才能得到电机的相关电气量。首先指出同步发电机稳态有限元模型中常涉及到等效轴向气隙计算长度、定子漏抗等4个计算参数。以300 MW汽轮发电机为例研究这些计算参数在合理范围内的取值对计算结果的影响,发现汽轮发电机等效轴向气隙计算长度对计算结果的影响较大,通常要考虑磁场的边缘效应。研究结果对于提高同步发电机稳态仿真的计算精度具有指导意义。
After calculating the magnetic field of synchronous generator by FEM, related electrical quantities are obtained relying on calculation parameters selected by experiences. The paper first pointed out that there are four calculation parameters such as equivalent axial air gap calculation length and stator leakage reactance and so on. Then taking a 300 MW turbine generator as an example, the influences of calculation parameters on simulation re- sult were researched. It was found that the equivalent axial air gap calculation length exerted greater influence on simulation result, with the edge effect of magnetic field usually considered. These results have some guiding signifi- cance for improving calculation precision of the stationary simulation of synchronous generator.
出处
《电力科学与工程》
2015年第5期29-33,共5页
Electric Power Science and Engineering
基金
国家自然科学基金项目(51307049)
关键词
汽轮发电机
有限元
计算参数
等效轴向气隙计算长度
turbine generator
FEM
calculation parameters
equivalent axial air gap calculation length
