National Institute for Research and Development in Environmental ProtectionRomania
This chapter describes the base algorithm and the implementation of a three-phase active filter controlled by a LabVIEW software application. This intelligent system was designed for power quality improvement in functioning of an electrothermal installation with electromagnetic induction. The active filtering device is composed by pulse width modulation (PWM) converter, which processes the power and the controller that is responsible for signal processing. The PWM converter accomplishes the current compensation from the power distribution. The filter controller processes the signal for a real-time determination of the references for instantaneous compensating current. These currents are continuously supplying the PWM converter. The LabVIEW application is also responsible for the electric parameter’s computing. The application uses a data acquisition board connected to a computer and an active filter realized with insulated gate bipolar transistors (IGBTs). This work also contains real measurement sets and parameter variation obtained by using the presented soft-controlled device.
Part of the book: New Applications of Artificial Intelligence