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
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