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To implement the practicality for fault diagnosis methods of medium-scale grounding grid, fault diagnosis model was established combining electrical network theory with sensitivity analysis in this paper. By simulation analysis of fault diagnosis, a new method which is used to select the node pairs to calculate the corrosion situation of grounding grid was presented. Based on this method, the fault...
As the US Navy continues to field ships with an increasing number of electrical generators and loads, it is unclear how the high magnetic fields being carried throughout the ship will impact the corrosion rate of structural and high current conducting alloys. Given the high pulsed current carried by high pulsed power systems, it is of increased interest to understand what impact their deployment will...
The problem of induced AC voltages on pipelines has always been with us, and the interference caused by power transmission lines to buried gas pipelines is under investigation for many years. Situations where a pipeline is influenced by power lines in a right-of-way are more frequent nowadays. Even under normal operating conditions, voltages and currents are induced on the pipeline that may pose danger...
The paper makes an analysis of the eighteen 220 and 400 kV overhead electric lines belonging to C.N. Transelectrica - Sibiu Branch (TSO) on the basis of a unitary methodology for assessing their technical state and taking into consideration the different types of expertise conducted until now, including the multispectral analysis from the helicopter of seven lines. Performance criteria for insulators,...
To improve the efficiency of the corrosion diagnosis, based on the hierarchical model, an actual grounding grid can be divided into six levels, such as actual grids, quasi- circuit-domain, circuit-domain, circuit-network, touchable network and intrinsic network. Based on above model, a novel node partition based approach is put forward. In which, a grounding grid is divided into several small-scale...
To benefit the fault detection and identification of conductor corrosion fault, a hierarchical simplified model of grounding grids is put forward. Minimum unit dividing is the key process of hierarchical simplification, which can be realized by the proposed algorithm. Branches are classified into clear branch and uncertain branch. A Monte-Carlo based testability evaluation approach is suggested. The...
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