Design and implementation of constant flux controller for VSI assisted SEIG feeding induction motor pump Online publication date: Mon, 25-Apr-2022
by Sachin Angadi; Udaykumar R. Yaragatti; Yellasiri Suresh; A.B. Raju
International Journal of Power Electronics (IJPELEC), Vol. 15, No. 3/4, 2022
Abstract: In small scale, stand-alone, wind-power generation employing self excited induction generator (SEIG), water pumping using an induction motor is a typical application. In this paper, a simple voltage regulation scheme for the constant flux operation of the inverter assisted SEIG feeding three-phase induction motor pump is presented. The behaviour of DC-link voltage, frequency, amplitude modulation index (ma) and the shaft speed for load and speed perturbations are discussed in detail. Also, the overall active and reactive power flow for constant flux operation at the point of common coupling (PCC) is analysed. The proposed work presents a simple and reliable controller for SEIG-based stand-alone system for frequency-dependent loads using only a DC-link voltage sensor. Detailed system simulations are performed using Matlab/Simulink and the results of a laboratory prototype are presented to validate the theoretical analysis and practical operability of the proposed system.
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