유효전력 평형조건을 이용한 망상 배전계통 고장판정방법 = A Fault Allocation Method for Distribution Network using Real Power Balance

다국어 초록 (Multilingual Abstract)

In this paper, a fault allocation method is suggested for distribution systems with fault currents at both ends. Tn a smart grid with various distributed generation systems in operation, the power flow may not be one directional. Therefore, the over-current relaying protection, most common in distribution system protection is not proper anymore. The proposed method uses the power balance condition in a section for both fault detection and allocation. The suggested method cannot consider the effect of the power loss at grounding. However, in spite of this weakness, the fault allocation error was not more than 5.2% even in the case with fault currents at both ends. Furthermore, there is no recursion process which can be the cause of time consuming. It is expected, if the grounding condition is considered adequately, the suggested method can be a candidate of protection method for complicated distribution systems like smart grids.

목차 (Table of Contents)

• Abstract
• 1. 서론
• 2. 제안된 고장위치 판정방법
• 3. 사례 연구
• 3. 결론
• [참고문헌]