Electronic load controllers for self excited induction generator

Micro hydro projects are gaining world wide attention due to the various advantages. Micro hydro power is a renewable, clean and environmental friendly, less gestation period. Very small (below 10KW) capacity plant is viable if it is economic. Isolated micro hydro plant can be controlled either by governor system or by using Electronic controllers to keep its frequency constant. It may use conventional alternator or Induction generators. These schemes depend on the capacity and requirement. So by using appropriate technology we can reduce the cost of micro hydro system. This paper describes the requirement and concepts of Electronic load controller (ELC) and Induction generator controller (IGC). This paper describes the resent technology which can make very small schemes viable. Various Electronic controllers are discussed for induction generators as well as alternators. its pros and cons is described and economically viable system is suggested for the system below 30 kw capacity.