变电站进线电缆化对电网供电模式的影响

Impact of Cabling Reconstruction of Substation Inlet Line on Power Supply Mode

随着城区负荷密度的提高和用电量的急增,目前呈现高压变电站深入负荷中心供电的趋势,但出于市容建设等各方面的要求,架空线走廊日益紧张,新增高压供电线路基本以电缆为主。基于架空线和电缆线路的不同特性,对不同电压等级变电站的主接线和电网供电方式进行分析,研究了架空线电缆化对网络结构和变电站主接线产生的影响,对不同供电方案进行比较,为高压电缆线路给城市电网的供电模式带来的影响提出对策。

With the increase of power load density and electricity consumption in urban areas, HV substations have developed for power supply in load center. However, the corridor of overhead lines is becoming more difficult to obtain due to city construction requirements. So the high voltage cables are now widely used in the urban power supple network. Based on the different characteristics of cable and overhead line, this paper analyzes the main connection and power supply mode of different substations, as well as the impact of cabling reconstruction of overhead line on network structure and substation main connection. Finally, various power supply modes are compared, and some countermeasures are proposed for the impact of HV cable line on the urban power supply mode.