Subject review Total power losses in a power system consist of technical losses and commercial losses. Commercial losses are 30-40 % of total losses and appear as a result of unreliable measurement devices for electricity registering and wilful unauthorised consumption of electricity. It is almost impossible to find illegal connections in a distribution power system due to hidden main power cab...

For railway and metro operators, offering a 4G network connection is becoming more critical to keep up with passenger demands for continuous access to data and mobile services while they are on the move. As a result Radio Frequency Systems (RFS) conducted a comprehensive measurement campaign focusing on in‐tunnel LTE performance based on its Radiaflex radiating, or leaky feeder, cables to revie...

Medium voltage XLPE cables are becoming a major component for subsea systems, especially for connection of inter-array cabling for offshore wind farms. Cables in subsea installations are subjected to significantly different conditions compared to corresponding underground systems. In particular the combined influence of salt water and hydrostatic pressure is important to study in the case of we...

The most important aspect of the MINER Act is providing reliable communication for miners before and after tragic accidents. Reliable communication has always been a challenge in underground mines due to changing topologies and harsh environment. In addition, disasters disable electricity and communications cables, block tunnels and cause fire. These may damage the communication infrastructure ...

Perforation gun and cable are stuck underground, which often occurs in perforation. Whether the perforation gets properly or not will only affect cost of accident treatment, sometimes even success failure a well, delay best time other well layout; Therefore, unblocking fishing technology perforating is an important part operation. The operation sticking can be divided into two categories: one c...

This paper describes the simulation and experiment for partial discharge (PD) pulse propagation in 22.9kV CNCV power cables. To investigate the propagation characteristics of PD, experiments are carried out by injecting the PD pulse in 100m-long 60 mm 2 CNCV cable in the laboratory. The characteristics of PD are also simulated using EMTP to investigate and analyze PD in the same cable. By compa...