Experimental System for Transient Stress Dimmision by Using Controlled Commutation
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2013, Vol 37, Issue 37
Abstract
The controlled switching can be applied to any type of commutations. Now there are dedicated controllers which are used more often for the switching of the transport and distribution lines, of the small inductive loads, of the capacitors batteries, or the energizing the no load power transformers. The rate of decreasing of the dielectric rigidity and the mechanical dispersion of the switching on/off times qualifies the breakers to be able or not for controlled switching and give an optimum for different switching applications. The compensation of the waiting time is essential in order to obtain good performances, even for daily used breakers. The influence of the pause time on the driving mechanism is one of the mainsprings of the command errors. The paper presents an experimental system developed microcontroller Dallas (8051 family) used to controlled switching of various loads. The microcontroller programming take into account the controlled closing command. Closing time which is the target closing time is the sum between the delay of the command corresponding to the considered phase and the predicted closing time. Predicted closing time depends on the ambient temperature, the type of operating mechanism and pause time. Experimental system reduces the transient requests using the control of closing command.
Authors and Affiliations
Virginia Ivanov, Maria Brojboiu, Sergiu Ivanov
Keywords
Related Articles
- EP ID EP93891
- DOI -
- Views 163
- Downloads 0
Rapid Determination of the Over-Transient Longitudinal Reactance
The paper presents an original method to determine the over-transient reactance by the longitudinal axis of a synchronous generator, starting from the symmetric three-phased sudden short-circuit test, from the dry run an...
THE STUDY OF THE AUTOMATIC SYSTEM FOR THE SEALED COCKPITS AIRFLOW REGULATION USING INDIRECTLY ACTION AIRFLOW REGULATORS
The paper presents the mathematical model of an automatic system for the sealed cabin airflow regulation using indirectly action airflow regulator. The goal of this Automatic Regulation System (ARS) is to constantly prov...
Energetic Analysis of the Drying Process of Cur-rent Transformers from 110 kV Ciungetu Power Station
Currently, at company Hidroserv Râmnicu Vâlcea, the drying of current transformers used in power transformer stations is done by a combination between induction and conduction heating at the frequency of 50 Hz. Obviously...
Monitoring and Analysis of the Electrical Parameters for an Industrial Consumer using LabVIEWEnvironment
This paper presents a case study for monitoring the quality of electric energy in an industrial consumer. The measurements were carried in the power supply point where the quality of the electric energy is influenced by...
Some Problems Concerning Power Management System for More Electric Aircraft
This paper aims to present some problems concerning the electric power management systems of aircraft. In the first sections are presented some converters topologies used on aircraft, principles and digital control s...