대용량 배전계통 공급용량 증대방안에 대한 경제성 분석

In the distribution systems, the maximum power transportation capacity is restricted within 40㎿ based on two lines, because of the thermal current limit of a distribution line. Recently it has been continuously required to expand the abilities of the power transportation in distribution systems, as the number of large scale industrial complexes and distributed generations are growing. In this paper, we suggested the five alternatives combining two methods, laying the two bundle lines and adding another voltage between the 22.9㎸ and 154㎸ in distribution systems. This paper implemented the economic evaluations of proposed alternatives from national and customer perspectives. And then we compare the results with those of 154㎸ transmission system.