POWER FACTOR AUTOMATIC COMPENSATION WITHIN 20/6KV ELECTRICAL TRANSFORMATION STATIONS
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2011, Vol 35, Issue 35
Abstract
The addition of the compensation of the power factor is one technical measure to improve the functioning of the electrical installations. Because the loads of the electrical installations show fluctuations in 24 hours and during one calendar weeks the number of capacitors that must be active must be variable according to the reactive power that must be compensated. This is done by step capacitor batteries with automatic connection controlled by a dedicated electronic equipment with microprocessor. The equipment receives information on the offset between the installation current and voltage that is to be compensated according to which it connects or disconnects the necessary capacitor steps to the distribution system lines, so that the power factor to be kept around a preset value. The equipment permanently displays the instant power factor value and it is provided with an abnormal functioning state warning block. This way the paper presents ways to do automatic compensation of the power factor within electrical supply stations within a single 20/6kV transformer of 4 MVA power and also the compensation of the power factor within electrical supply lines within two 20/6 kV transformers of 2x4 MVA. The solution presented is distinguished in that it solves the problem of power factor compensation at a transformer station upgraded. Capacitor connection is made automatically by coupling or decoupling capacitors steps by comparison with the difference prescribed.
Authors and Affiliations
Mircea DOBRICEANU, Gheorghe Eugen SUBŢIRELU, Octavian Dan DOBRICEANU
Keywords
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