Solar PV Battery Powered BLDC motor Water Pump
Introduction:
We will delve into a simulation model that focuses on the integration of solar PV, battery storage, and a vertical DC motor for water pumping applications. This model showcases the dynamic behavior of a sustainable system that harnesses solar power, stores energy in a battery, and efficiently drives a water pump using a DC motor.
Simulation Model Components:
Photovoltaic (PV) System:
PV panels generate power with a single panel rating of 79.9 Watts.
Two parallel strings of 14 series-connected PV panels create a 238V array.
A boost converter, controlled by Incremental Conductance MPPT algorithm, optimizes power extraction based on changing solar conditions.
Battery System:
A bidirectional converter connects the battery to the common DC bus.
The battery ensures continuous power availability during variations in PV power.
DC bus voltage is maintained at 310 volts through a proportional-integral (PI) controller.
Water Pump Drive System:
A brushless DC (BLDC) motor drives the water pump.
The motor control logic includes a back electromotive force (EMF) table, hall sensors, and an inverter.
Speed control is achieved through pulse-width modulation (PWM) based on the back EMF signals.
Simulation Dynamics:
PV System Operation:
The simulation dynamically adjusts PV power output based on changing irradiation levels.
Incremental Conductance MPPT algorithm ensures the PV system operates at its maximum power point.
Battery Operation:
The battery plays a crucial role in balancing power supply during variations in PV power.
Charging and discharging modes are demonstrated as PV power fluctuates.
Water Pump Drive:
The BLDC motor efficiently drives the water pump based on the available power.
Speed control and electromagnetic torque generation are demonstrated through simulation.
Results and Operating Conditions:
PV and Battery Performance:
PV voltage, current, and power vary with changing irradiation levels.
Battery voltage and current exhibit shifts between charging and discharging modes.
DC Bus Voltage Control:
The PI controller maintains the DC bus voltage at a constant level of 310 volts.
BLDC Motor Operation:
The BLDC motor operates at a speed of 3000 RPM with an electromagnetic torque around 3 Nm.
System Performance during Irradiation Changes:
Irradiation changes from 500 to 1000 to 500 Watts per square meter, impacting PV power and subsequent battery operation.
The water pump continues to function efficiently despite variations in power availability.
Conclusion:Â
This simulation model provides insights into the performance of a solar PV battery-powered water pump system. The integration of PV power, energy storage, and an efficient motor drive showcases the adaptability of such systems to changing environmental conditions.
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