Analysis of switching on selected electrical high voltage circuits
Journal Title: Mining – Informatics, Automation and Electrical Engineering - Year 2016, Vol 525, Issue 1
Abstract
Physical phenomena occurring in high-current contact systems of electric switches, when switching on unloaded transformers and capacitor banks, are much more dangerous than the phenomena occurring in the contact switch systems installed in other electric power systems. Switching on unloaded transformers may be accompanied by significant over-currents, greatly exceeding the nominal currents of the transformer. Connecting the capacities of capacitor banks causes transients in the circuit, leading to significant, fast over-currents and over-voltages. High-frequency currents may be transmitted by electromagnetic couplings to control circuits and other low-voltage circuits. The subject of the paper is the analysis of transient processes during switching on unloaded transformers and the capacities of capacitor banks. Additionally, the authors assess the impact of the power switching phase in particular circuits on the over-currents which arise there.
Authors and Affiliations
Stanisław Jan Kulas, Hendryk Supronowicz
Keywords
Related Articles
- EP ID EP283420
- DOI -
- Views 159
- Downloads 0
Analyses of parabolic processes to assess mapping stability of mining area ground dislocations in the INGEO system
The article features deliberations concerning the analysis of the following in the homomorphism of processes: deformations corresponding to the medium (rock mass) vibrations which generate physical threats in the subarea...
ENDIS 4.0 as replay on requirements of Industry 4.0 in field of power supply and automation for mining
This article presents a new product line for energy distribution and control ENDIS 4.0 from the perspective of the Industry 4.0 requirements implemented by Europe. The paper presents various variants of the technical sol...
Bucket wheel excavator cutting tooth stress and deformation analysis during operation using Finite Elements Method (FEM)
In the case of bucket wheel excavators, the cutting process is influenced by the forces opposing the working elements and cutting tools. These forces determine the choice of machines and their parameters as well as the o...
Autonomous fiber-optic gas monitoring system with thermoelectric power supply
This paper presents the concept of an autonomous measuring instrument powered by a locally accessible source of heat with a contact surface area of over a dozen or several dozen cm2 and a temperature higher or lower than...
Universal server for monitoring industrial devices using web browser
This paper presents the implementation of a universal intermediate server for the monitoring of industrial devices using the Modbus TCP protocol. The application provides selected information using the HTTP protocol acce...