旋转电机中雷电波测量的研究 .pdfVIP

学兔兔 第50卷 总第573期 电测与仪表 Vo1．5O No．573 2013年 第9期 Electricai MeasurementInstrumentation Sep．2013 旋转电机中雷电波测量的研究术 郑会军 ，郭凤德 ，付乔 (1．攀枝花学院电气信息工程学院，~7)11攀枝花617000； 2．乐山师范学院物理与电子工程系，四川 乐山614004) 摘要：分析了旋转电机在电力系统中机电波传播规律。用拉普拉斯、z变换和Bessel函数推导出机电扰动波在 电力系统中的变化特征，理论分析描述出扰动变化规律与机电波在同距离线路上的变化规律一致，而且离散系 统中扰动传播到每一条母线所需要的时间与连续体模型中机电波传送所需时间也一致。对比两种模型可知扰 动在任意两个母线之间的传播时间取决于其电气距离，与输电线路的实际长度没有关系。论文最后用一个由 64台发电机组成仿真系统，验证了以上提出方法的正确性，为分析电力系统中雷电波的传播提供了理论依据。 关键词：电力系统；机电扰动；传播特性；拉普拉斯变换；Bessel函数族 中图分类号：TM301 文献标识码：B 文章编号：1001—1390(2013)09—0051—04 Analytical Research on Impulse Characteristic of Lightning Wave in Rotating Machine ZHENG Hui-jun ，GU0 Feng．de ，FU Qiao (1．School of Information and Electric Engineering，Panzhihua University，Panzhihua 6 1 7000，Sichuan，China． 2．Department of Physics and Electronic Information，Leshan Teachers College，Leshan 614004，Sichuan，China) Abstract：The propagation law of electromechanical disturbance in a discrete uniform chain power system is presented in this paper．By virtue of Laplace transformation and Z transformation，it represents the varying features of the electro— mechanical disturbance in a uniform network using the family of Bessel functions；the growing or decaying laws are the same as that of electromechanical wave in the continuum model along the corresponding transmission lines．Further- more，the time of the electromechanical disturbance arriving at any bus in the discrete model is also the same as that of the electromechanical wave arriving at the corresponding bus in the continuum．According to the contrast of the two models，it proves that the propagating ti