750kV交流变电站导体电晕校核的新方法

A New Method of Conductor Corona Effect Check for 750kV AC Substations

750 kV及以上交流变电站的软、硬导体选择直接关系到变电站的投资及安全稳定运行。随着电压等级的提高,选择合适的软、硬导体也可以降低乃至避免变电站内导体、导线产生电晕及高频的电晕噪声,从而建设资源节约型和环境友好型的精品工程。依托在建的沙洲750 kV变电站内软、硬导体选择及电晕校核,提出了750 kV变电站内软、硬导体新的电晕校核方法,并针对实际的软导线进行了相关技术经济比较,从而得到最适合沙洲750 kV变电站的软、硬导体型式。

The selection of soft, or hard conductors directly affects the cost and operation of 750 kV and above AC substations. With the increase of voltage levels, proper soft and hard conductors can reduce or even avoid corona discharging and high frequency corona noise caused by wires and conductors in substations, which is further beneficial to construct resource-saving and environment-friendly projects. Based on the selection of soft and hard conductors and corona checking in 750 kV Shazhou Substation under construction, a new method of corona checking for soft and hard conductors in 750 kV substation is presented. Economic and technical comparisons are carried out on practical soft conductors, in order to propose the most suitable soft and hard conductors for 750 kV Shazhou Substation.