Monitoring System for Reducing the Electric Equipment Stress in Transport and Distribution Lines
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2017, Vol 41, Issue 41
Abstract
A frequently used method for monitoring and fault diagnosis of the electric equipment is the one based on the analytic model. The paper applies the diagnosis method based on the analytic model by investigating the waveforms of the currents and voltages specific to a transport and dis-tribution line when interruption fault occurs. This method can be used when the system behavior is compared with the results of the mathematical model which reproduces the system in normal operation conditions. For identifying the fault, the waveforms corresponding to different faults are stored in an information database and compared with the ones corresponding to the normal operation. The paper presents a microcontroller based system used to control switching of interruption fault for transport and distribu-tion lines. In order to reduce the breaker stress due to the commutation overvoltage, the paper presents an analysis of the optimum instant when a long line must be disconnected. Similarly, an analysis is performed on the instants of the long lines reconnection. The both analyses are performed taking into account the specific parameters and the length of the lines. The focused magnitudes during the transients are both the maximum values and the slopes of the overvoltage and the maximum values of the currents.
Authors and Affiliations
Virginia Ivanov, Maria Brojboiu, Sergiu Ivanov
Keywords
Related Articles
- EP ID EP264095
- DOI -
- Views 95
- Downloads 0
Dynamic Regime Electromagnetic Torque in Brushless Direct Current Motors
This study aimed at establishing the mathematical model for determining the dynamic regime torque and at emphasizing constructive aspects which influence its magnitude and variation. Brushless direct current motors are v...
Hysteresis Current Control of the Single - Phase Active Filter
To compensate harmonic current components in case of unbalanced three-phase loads authors will propose a structure composed by three single phase active filters. To begin is implemented the single-phase active filter whi...
MODELLING OF ELECTROMECHANICAL CONVERTERS OF TRACTION USED ON ELECTRIC LOCOMOTIVES
The paper begins by presenting basic electrical diagrams of the main types of electric locomotives (with chopper and DC motors or with rectifiers and DC motors or with VVVF and induction motors IM or with self-controlled...
The Study of Asynchronous Motors Behavior in Artificial Load
The performances and heating of asynchronous motor are established to nominal load into a testing laboratory. Only in this way can be created real life working conditions, but there are also two big disadvantages: the ne...
Aspects Regarding Operation of Power Supply System of Cars
In this paper there are presented a few aspects regarding the operation of the direct current power supply system of cars. The operation of the electronic voltage con-troller is specially approached. Theoretical aspects...