Design and fabrication of a low cost analog electronic load controller for a self excited induction generator supplying single-phase loads

This paper presents the design of an analog electronic load controller (ELC) suitable for stand alone pico-hydel power stations having a three phase SEIG feeding single phase load, which is highly simple, cost effective and encapsulate protective features. Proposed ELC incorporates 0-100% duty ratio of chopper for PWM pulses. Power supply for controller and cabinet cooling fan is also extracted from SEIG terminals. Proposed ELC is very cost effective and viable with minimum number of components and full protections, tested in laboratory for 5.5 kW load. Performance of the above system is simulated and supplemented with experimental results.