Ground subsidence due to underground coal mining threatens the safety of surface infrastructure such as buildings, roads, bridges, powerlines and telecommunication cables, and can cause environmental problems such as water pollution, cessation of stream flow, and so on. Monitoring the spatial distribution of surface deformation may be helpful for land-use planning, land reclamation, safety and ...

A leaking water pipe bursting high pressure water jet in the soil will create slurry erosion which will eventually erode the adjacent natural gas pipe, thus causing its failure. The standard 300 mm safety distance used to place natural gas pipe away from water pipeline facilities needs to be reviewed to consider accidental damage and provide safety cushion to the natural gas pipe. This paper pr...

In this paper, a flexible numerical framework to provide thermal performance assessment for the underground buried cables, considering different geological and meteorological conditions, has been presented. Underground cables tend retain heat produced in conductor, so complex coupled thermo-hydraulic response of porous medium surrounding needs be assessed prevent cable overheating associated re...

Thefaults in the underground cables cause to generatetransients which propagate along power cable as travelling waves. The velocity of generated wave and time taken by a reach source point from fault location enables us calculate distance value.In this paper double endedtravelling based approach is used communication channel designed distance. A circuit-based model developed EMTP-RV software fi...

Cable termination faults are problematic in electrical networks almost always. Technology has solved problems somewhat, but there are many annual reports about damaged cable terminations. For analyzing the problems, faults in two regional electricity companies are studied. At first step, damaged cable terminations are analyzed statistically and grouped according to their problems. Then, some of...

In this study, nonlinear vibration of a composite cable is investigated by considering nonlinear stress-strain relations. The composite cable is composed of an aluminum wire as reinforcement and a rubber coating as matrix. The nonlinear governing equations of motion are derived about to an initial curve and based on the fundamentals of continuum mechanics and the nonlinear Green-Lagrangian stra...

Bu çalışmada orta gerilimli yer altı kablolu elektrik dağıtım şebekelerinde oluşan arızıları tespit etmek amacıyla kablo arıza teşhis cihazı tasarlanmıştır. cihazla Darbe Yansıma Metodu kullanılarak 40 kV’a kadar darbe jeneratörü ile arızanın yerini noktasal olarak edilmesi amaçlanmıştır. Bunun için 0-8 kV, 0-16 kV ve 0-32 kV’luk, aralıklarında 2.000 Joule enerjiye sahip bir Arızalı fazın tespi...

This paper aims to critically analyze the IEEE Std 1234-19 and other power cable fault-finding technical guides produced by leading industries assess their applicability in practice underground low voltage distribution network (LVDN). The analysis reveals that there is no clear distinction between techniques procedures of LV MV/HV systems. Innumerable branching residential loads LVDN makes them...