光学电流传感器用于配电网单相接地故障电流检测

摘要

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与全光纤型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.