Title: Design and implementation of constant flux controller for VSI assisted SEIG feeding induction motor pump

Authors: Sachin Angadi; Udaykumar R. Yaragatti; Yellasiri Suresh; A.B. Raju

Addresses: Department of Electrical and Electronics Engineering, KLE Technological University, Hubballi, India ' Department of Electrical and Electronics Engineering, National Institute of Technology Karnataka, Surathkal, India ' Department of Electrical and Electronics Engineering, National Institute of Technology Karnataka, Surathkal, India ' Department of Electrical and Electronics Engineering, KLE Technological University, Hubballi, India

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 (m_a) 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.

Keywords: active power; constant flux; induction motor; induction generator; reactive power; self excited induction generator; SEIG; stand alone SEIG; voltage regulation; water pumping.

DOI: 10.1504/IJPELEC.2022.122407

International Journal of Power Electronics, 2022 Vol.15 No.3/4, pp.473 - 494

Received: 12 Oct 2019
Accepted: 09 Feb 2020
Published online: 25 Apr 2022 *

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