Optimal Voltage Management Based on the Flexible, Reliable, Intelligent and Energy-conservative Distribution System (FRIENDS)

차세대 전기에너지공급시스템(FRIENDS)에 의한 최적 전압관리방안에 관한 연구

In recent years, better quality in power electric services is being required with the development of information industries and the improvement of living standards. Also, the small scaled dispersed storage and generation (DSG) systems are being interconnected with the distribution systems and customers by the influence of the recent issues such as deregulation and global environmental problems in power system. Under these circumstances, it is very important to maintain the customer voltages within allowable limits for the distribution system which is located at the most sensitive part in the power system. To overcome these problems, this paper shows the basic concepts of FRIENDS which is considered as one of the power delivery system in the near future and also presents an evaluation method on the impacts of customer voltages by operation models of FRIENDS. The FRIENDS can change the system configuration in a flexible manner by using the static switches and offer the different power qualities in power services through the power quality control centers which play the most important role in FRIENDS. Numerical examples are shown in order to indicate the efficiency of the proposed method.

본 논문에서는 세계적인 추세에 있는 전력산업의 규제완화와 지구규모적인 환경문제, 전기의존도의 증가, 수용가의 다양한 요구 등 배전계통을 둘러싼 환경변화에 대응할 수 있는 차세대 전기에너지공급시스템의(FRIENDS)의 기본개념과 운용모델을 제안하여, 기존계통에의 도입적용에 대한 구체적인 실현형태를 제시한다. 특히, 배전계통의 목표관리로 수행되고 있는 수용가전압의 전압관리 측면에서 FRIENDS의 운용모델과 기존의 전압관리 운용방안을 비교ㆍ평가하는 수법을 제시하여, FRIENDS의 운용효과를 정량적으로 평가한다. 여기서, 차세대 배전계통은 유연하게 계통구성을 변화시킬 수 있고, 수용가에 멀티메뉴 서비스를 제공할 수 있으며, 각종 설비의 고효율운전을 가능하게 하는 고유연ㆍ고신뢰ㆍ고효율 전기에너지유통시스템을 말한다.