【摘要】 对替代定理、三相电路、电气化铁路的换相联接、电力系统短路的特殊问题及其表现形态，作了分析论证。作者特别提出电力系统零序网络定则更多还原

【Abstract】 This paper has analysed and demonstrated for several particular problems and their manifesting forms,such as the compensation theorem,the three phase circuit,the phasing connection of the electrified railway,the short circuit in electric system,etc.The writers advance specially the rule of zero sequence network in electric system.更多还原