This
paper deals with the solar photovoltaic (PV) array fed direct torque controlled
(DTC) induction motor drive for water pumping system. To extract maximum power
from the solar PV array, a DC-DC boost converter is employed. The soft starting
of a three-phase induction motor is achieved by controlling the DC-DC boost
converter through the incremental conductance maximum power point tracking
(MPPT) technique. The induction motor is well matched to drive a type water
pump due to its load characteristics. It is well suited to the MPPT of the solar
PV array. By using DTC technique, an induction motor exhibits homogeneous or
even better response than the DC motor drive. The proposed system is designed
and its performance is simulated in MATLAB/Simulink platform. Simulated results
are demonstrated to validate the design and control of the proposed system.
KEYWORDS:
1. Solar
Photovoltaic (PV)
2. Direct
Torque Control (DTC)
3. MPPT
Control
4. Induction
Motor
5. Water
Pump
SOFTWARE: MATLAB/SIMULINK
CIRCUIT DIAGRAM:
Fig.l
Schematic diagram of proposed system configuration
Fig.2
Steady state performance of proposed system
Fig.3
Starting performance of proposed system
Fig.4
Performance of the system at decrease in insolations
Fig.5
Performance of the system at increase in insolations
CONCLUSION:
It
has been demonstrated that the solar PV array fed DTC controlled induction motor
drive has been found quite suitable for water pumping. A new method for
reference speed generation for DTC scheme has been proposed by controlling the
voltage at DC bus and pump affinity law has been used to control the speed of
an induction motor. Solar PV array has been operated at maximum power during
varying atmospheric conditions. This is achieved by using incremental
conductance based MPPT algorithm. The speed PI controller has controlled the
motor stator current and controlled the flow rate of pump. Simulation results
have demonstrated that the performance of the controller has been found
satisfactory under steady state as well as dynamic conditions.
REFERENCES:
[I]
R. Foster, M. Ghassemi and M. Cota, Solar energy: Renewable energy and the
environment, CRC Press, Taylor and francis Group, Inc. 20 I O.
[2]
S. Jain, Thopukara, AK. Karampur and V.T. Somasekhar, "A SingleStage Photovoltaic
System for a Dual-Inverter-Fed Open-End Winding Induction Motor Drive for
Pumping Applications," iEEE Trans. On Power Electro.. vo1.30, no.9,
pp.4809-4818, Sept. 2015.
[3]
M. A Razzak, A S. K. Chowdhury and K. M. A Salam, "Induction motor drive
system using Push-Pull converter and three-phase SPWM inverter fed from solar
photovoltaic panel," international Conference on 2014 Power and Energy
Systems: Towards Sustainable Energy, 13- 15 March 2014.
[4]
J.V. Caracas Mapurunga, G. Farias Carvalho De, L. F. Moreira Teixeira, L.A
Ribeiro De Souza, "Implementation of a HighEfficiency, High-Lifetime, and
Low-Cost Converter for an Autonomous Photovoltaic Water Pumping System," iEEE
Trans. On ind. Appl., vo1.50, no.!, pp.631-641, Jan.-Feb. 2014.
