Rogowski Coil과 Current Transformer의 직렬 아크 사고 측정 신호 비교

Abstract

The protection method for an arc of the photovoltaic generation system affected by the wire aging and poor contact of electrodes has been required. About a household photovoltaic systems, the series arc fault detection circuit and algorithm has been implemented, and the current transformer (CT) is used to detect the arc current. Although the CT is a useful current sensing device under the low current condition of the household photovoltaic systems, it is difficult to adopt for the medium-size photovoltaic generation system because of the saturation of transformer, wire thickness, and limited winding area. In this paper, the possibility of the sensing method using rogowski coil to detect the series arc fault of the medium-size photovoltaic power plant.