초록 close

기술하면 다음과 같다.i) LDC에 의해 전압조정이 되는 기존의 배전계통에 분산전원이 도입되면, 분산전원의 운전역률과 도입량으로 인하여 LDC의 내부정정계수에 의해 결정되는 송출기준전압의 저하현상이 일어나게 되므로 LDC는 그 적정전압유지의 기능을 상실하게 된다ii) 분산전원의 운전역률을 진상으로 할수록 송출기준전압저하에 끼치는 영향이 작아진다.iii) 분산전원의 운전역률을 지상으로 할수록 송출기준전압저하에 끼치는 영향이 커진다.


- This paper describes a new method for determining the permissible operating range of DG(Distributed Generation) when DG is introduced into power distribution systems of which the voltage is controlled by LDC(Line Drop Compensator). Much of the DG installed during the next millennium will be accomplished through the reconstruction of the electric power industry. But in that case, it is difficult to properly maintain the terminal voltage of low voltage customers by using only LDC. This paper presents a method for determining the permissible operating range of DG for proper voltage regulation of power distribution systems with LDC. Proposed method has been applied to a 22.9 kV model and practical distribution systems, and its result is almost identical with the simulation result.