Research On The Automatic Differentiation Of Faults In The Automation Of Power Distribution

This paper firstly analyzes the constitution of automation in Binnan distribution network on the basis that most feeders of 6kV in our oilfield are of radiation in topology and partly with double power sources, more branches and majority of well motor loads. Then it puts forward that Binnan network should set up key automation station and fix FTU and breaker terminal at the start of feeders and at line start of comparatively longer branches. Taking the advantage of plain location, the digital radio communication system is used between key station and terminals . The system in key station is designed an organic whole of GIS based on ARC/INFO and SCADA systems .So terminals can achieve the functions of alternate sampling, remote signal, remote control, fault-checking and fault insulation.On the basis of the structure and management pattern of Binnan network, it also puts forward the cooperation of FTU and FTU, FTU and station feeder protection circuit, methods for fast cut-off of real feeder fault and fault insulation so as to insulate the feeder fault to an minimum scope of power failure. Meanwhile, the key station can locate all the faults, identify their types and recover from them.In accordance with the features of weak current grounding and more feeders of 6kv stations in Binnan network, it puts forward the method for route selection between single-phase faults of week current grounding system suitable to Binnan network.In practical use, the test project of distribution automation of Binnan network is working well with full functions. The contradictions of cow efficient operation, backward management and low level of automation are better solved.