光学电流传感器用于配电网单相接地故障电流检测

APPLICATION OF OPTICAL CURRENT TRANSDUCER TO SINGLE-PHASE GROUNDING FAULT CURRENT DETECTION IN POWER DISTRIBUTION SYSTEMS

针对小电流故障选线及定位困难的状况，从改善量测手段的角度考虑，提出光学电流传感器（ＯＣＴ）在小电流故障选线定段中的应用方案。给出２种形式的零序光学电流传感器（ＺＯＣＴ）结构，即组合型ＺＯＣＴ与全先纤型ＺＯＣＴ，分别适用于电缆线路和架空线路。并对方案的可行性及ＺＯＣＴ的实现问题进行了论证。

Responding to the difficulties existing in small current fault line selection and fault section determination in power distribution systems, this paper proposes a scheme that from standpoint of improving measurement level, optical current transducer (OCT) is applied to solve the above problem. The structures of two types of zero-sequence OCTs (ZOCT),i.e. hybrid ZOCT and whole-fiber ZOCT. suitable for cables and overhead lines respectively, are presented. Feasibility of the scheme and implementation of ZOCT are discussed.