随着用电负荷的增长和电力交易的增加,更多的电能需要远距离传输.

Growing consumption and power trading mean that power must increasingly be transported over large distances.

近几年随着城市的发展，工业项目的增多，需要建设较多的高压变电站，以满足区域用电负荷的增长。

Following the development of city and the increase of industry projects in recent years, more and more extra high-voltage substations are constructed to meet the soaring demand for electricity.