Development of electronic load controller for IAG based standalone hydro power generation

An electronic load controller (ELC) is developed for an isolated asynchronous generator (IAG) to feed 3-phase, 4-wire consumer loads in a small hydro power generation system. This ELC consists of ac capacitors, voltage source converter (VSC) with a dc capacitor, a chopper, an auxiliary load at its dc bus, a star/hexagon transformer, consumer loads and it is implemented using synchronous-reference-frame (SRF) theory. This ELC provides a viable and cost-effective solution to achieve voltage and frequency control, harmonic elimination and load balancing for linear and nonlinear loads. Test results are presented to demonstrate the effectiveness of ELC for the IAG system.