Research Of The Reactive Power Compensation System Based On Fieldbus

Aiming at the fact that power factor of low-voltage power equipment is very low in china and application condition of Fieldbus technology in the world, based on enhancing power factor of AC motor, lowering losses of the Reactive Power, improving power quality, therefore, it is of great significance and practical value to research the Reactive Power Compensation by applying the technology of Fieldbus, computer and power electronics.In the dissertation, the key technology of the Reactive Power Compensation, the fashion of Thyristor Connected Capacitor, the way grouped of Capacitors are analyzed based on the constructed general structure . On the foundation of the Reactive Power Compensation theory, the structure of Thyristor Switched Capacitor equipment is built and the fashion of Thyristor Switched Capacitor is established. In order to get effective control parameter, the real time detecting method for the Reactive Current is specified by using the instantaneous reactive power theory of three-phase circuit. On the basis of LonWorks technology , hardware and software structure of intelligent node is designed , A/D sampling and data traffic by applying network variables are researched in detail. Finally, the network node is configured by employing the Lon Works exploiting tools, monitor-control of host computer for Lonworks network and detecting method for network data are studied dependent on the LNS DDE server.