A Study on the Optimal Distribution toss Management Using toss factor in Power Distribution Systems

분산형전원이 도입된 배전계통의 손실산정기법에 관한 연구

Recently, the needs and concerns for the power loss are increasing according to the energy conservation at the level of the national policies and power utilities's business strategies. Especially, the issue of the power loss is the main factor for the determining the electric pricing rates in the circumstances of the deregulation of electrical industry. However, because of the lacking of management for power loss load factors (LLF) it is difficult to make a calculation for the power loss and to make a decision for the electric rates. And loss factor (k-factor) in korea, which is a most important factor for calculation of the distribution power loss, has been used as a fixed value of 0.32 since the fiscal year 1973, There(ore, this study presents the statistical calculation methods of the loss factors classified by load types and seasons by using the practical data of 65 primary feeders which are selected by proper procedures. Based on the above the algorithms and methods, the optimal method of the distribution loss management classified by facilities such as primary feeders, distribution transformers and secondary feeders is presented. The simulation results show the effectiveness and usefulness of the proposed methods.

본 연구에서는 분산형전원이 연계된 배전계통에서 배전 손실을 설비별로 산정하는 알고리즘과 통계적인 방법에 의하여 배전손실 계수를 산정하는 알고리즘을 제시하여 배전 손실 관리의 정확도를 제고하는 방안을 마련하고자 한다. 먼저, 배전손실에 대한 개념을 정의하고 배전손실 산정시의 문제점에 대하여 분석하고, 배전손실 산정에서 가장 중요한 자료 추출 방법과 대상자료의 유효성 검증하는 방법을 제시한다. 그리고 통계적인 방법에 의한 부하특성계수를 산정하는 알고리즘을 제시하고, 배전손실 요소들간의 상호관계를 규명하며, 배전 설비별(고압배전선로, 배전용변압기, 저압배전선로) 손실계산 알고리즘을 개발한다.