【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。更多还原

【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 electromechanical 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.Furthermore,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 time of the electromechanical disturbance between any two neighboring buses is only associated with their electrical distance,not their actual spatial distance.Finally,the simulation by a 64 generators ring system validates the rationality and correctness of describing a power system using discrete model and continuum model.更多还原