Capacitive VAr controllers for induction generators for autonomous power generation

Self excited induction generators (SEIG) require controllable capacitive VAr to magnetise the machines and compensate the demagnetising effect of loads. Different types of controllers to provide custom power of requisite quality are discussed for different types of prime movers such as oil engines, hydro turbine and wind/wave turbines. Schemes involve self-regularity devices, power electronic controllers, automatic regulation and electronic switching. The criteria of design of controller with each prime mover are discussed. For autonomous power generation independent of the grid suitable schemes either with single unit or hybrid modes involving more than one energy source are described