Abstract
In India, most of the remote locations generally comprises of single-phase (1-Φ) loads that can be supplied through 1-Φ Self-Excited Induction Generator (SEIG), whereas three-phase (3-Φ) SEIG consisting of proper stable circuits signifies the most trustworthy option for micro-hydro applications. In this research, a novel configuration comprising a 3-Φ SEIG of delta (∆) connected stator being excited by a star (Y) connected capacitor bank to supply 1-Φ resistive load is examined under steady-state condition. Here, one of the capacitors is set constant and the remaining two are varied with the variation of load and speed of the rotation of SEIG. Using the symmetrical component analysis of the circuit, three nonlinear equations are obtained which are solved by the ‘fsolve’ method to get the value of three unknowns viz. two variable excitation capacitors and the per unit frequency for a perfect balanced scenario. The proposed configuration is found to have a perfect balance in stator currents and phase voltages while supplying the 1-Φ load with nearly 0% CUF (i.e. current unbalance factor) and VUF (i.e. voltage unbalance factor) respectively and is verified both in MATLAB simulation and experimental setup.
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