The application of fluorescent optical fiber in partial discharge detection of Ring Main Unit

Ring Main Units (RMU) are commonly used in the power system. At present, there is no example of partial discharge (PD) detection RMU by optical method. In this article, PD was detected Meanwhile, characteristics signals and influential factors have been analyzed. The phase, amplitude quantity positive negative half cycle analyzed listed we can find under four typical insulating defects their own characteristics; if output PMT not reach it saturation value, maximum will increase with applied voltage while average did always except insulation gap defect; besides, number also a relationship voltage. When receiving length quadruple, initial (IPDV) method has decreased about 14.7% increased 1046.5%; when pressure changing from 0.1 MPa to 0.14 MPa, IPDV 83.65% 36.23%; distance between fiber defect model 2.5 cm 7.5 cm, 9.3% 65.7%.