TITLE:
PV-Grid Tie System Energizing Water Pump
AUTHORS:
Sameer Khader, Abdel-Karim Daud
KEYWORDS:
Photovoltaic; Induction Motor; Centrifugal Pumps; Electrical Grids; Matlab/Simulink
JOURNAL NAME:
Smart Grid and Renewable Energy,
Vol.4 No.5,
August
19,
2013
ABSTRACT: This paper presents the behaviours of three-phase
induction motor driving centrifugal pump under various solar irradiation
levels, where the motor speed and torque depend on the source voltage and
frequency, while the water-flow rate depends on the motor speed, density, and
static head according to affinity flow. Matlab/Simulink model is proposed for
studying the behaviours of these machines with respect to water flow capacity,
motor current, electro-magnetic torque, and motor efficiency. The proposed
photovoltaic with maximum power point tracking model based on observation and
perturbation (O&P) maximum power tracking model is applied. The output
voltage is regulated throughout Buck-Boost converter with purpose maintaining
the output voltage at predetermined values. Since Induction motors are widely
used in pump systems, the electromagnetic torque, water-flow rate are studied
for various source frequencies. Comparison analysis is conducted for both
motors with respect to water flow-rate, heads elevation, and motor current. In
addition to that, the proposed system presents Photovoltaic-Grid (PV-Grid) Integrated model, where the power shortage required for
normally operation of the pump is drawn from the electrical grid.