Digital Signal Processor-based Controller Design and Implementation for Self-excited Induction Generator

Abstract

This article presents the design and implementation of a digital signal processor (DSP)-based induction generator controller (IGC) to regulate the voltage and frequency of a single-phase self-excited induction generator (SEIG), which employs a three-phase squirrel-cage induction machine that is suitable for the stand-alone power mode and employing an unregulated turbine, such as micro-hydro power generation. A three-phase induction machine can be used to generate single-phase supply at constant voltage and frequency if the electrical load is constantly maintained at its terminals. A prototype model of a single-phase SEIG is developed, such that the load on the SEIG remains constant despite a change in the consumer load. The transient behavior of the developed DSP-based SEIG–IGC system at different operating conditions, such as application and removal of static (resistive and reactive) and dynamic (single-phase induction motor) load, is investigated to demonstrate the capabilities of the proposed IGC.