ABSTRACT Document: INTERACTIVE SONIFICATION OF ABSTRACT DATA
ABSTRACT
description
Transcript of ABSTRACT
ABSTRACT
• Photovoltaic (PV) is one of the clean and free-pollution renewable energy, but it is an unreliable source because of the intermittent feature of weather.
• Well integration of the MPPT technique with PV array model will ensure the system operates at its maximum power point at different weather conditions and solar irradiation.
• This paper use the MATLAB Simulink to simulate the model.
INTRODUCTION
• Recently, the needs of renewable energy resources increase due to the fuel energy crisis and the global warming issue. Solar energy is one of the most important renewable energy
• Solar energy using photovoltaic (PV) has several advantages, e.g., no noise and free pollution.
• Two operational problems, the efficiency is very low especially under low irradiation conditions and in the intermittent weather condition the electric power changes continuously.
• What is MPPT and why it is needed? (Maximum power point tracking)It is needed a controller (MPPT) to achieve the highest efficiency and provide a stable power under the intermittent weather condition
• Why IC technique ?It shows good performance under the intermittent of solar irradiance
The simulation result will show how good is the performance of this IC technique.
PV Model• A solar cell basically is a p-n semiconductor
junction. When exposed to light, a dc current is generated.
PV Characteristic
IC MPPT Technique• The incremental conductance method is
developed under the fact of slope of the PV array power curve is zero at the MPP
IC MPPT Algorithm
Block Diagram of the Proposed PV System
PV ARRAY
BOOSTCONVERTER
PVINVERTER
3-PHASEGRID
IC MPPT CONTROL
I
V
PV INVERTERCONTROL
AC
DCDC
SIMULATION SYSTEM
Under mask the system
Simulation under constant solar irradiance• The maximum standard operating for constant solar irradiance is assumed
to be 1000 W/m2 in the study.
(A) The measured output of PV Module (B) The respond of IC MPPT tracking algorithm
Under 1000 W/m2 of solar irradiance, The duty cycle for boost converter is a constant value 0.45 and the booster convert around 92kW of power with constant ouput voltage 500 V to the PV inverter.
Output from boost converter
The PV module provides 100kW and the boost converter convert 92kW of energy
Comparison of the measured output of PV module with output of boost converter
Simulation under decreasing solar irradiance
(A) Decreasing of solar irradiance (B) Duty cycle of boost converter
The figure shows the decreasing solar irradiance (1000 W/m2- 800 W/m2 -250 W/m2).
(A) The measured output of PV Module (B) The respond of IC MPPT tracking algorithm
The figure shows the power, voltage, current of boost converter. Under (1000 W/m2- 800 W/m2 -250 W/m2) of solar irradiance, the booster convert around 92kW - 80 kW - 25 kW of power. The
booster maintains the output of voltage to be 500 V to the PV inverter.
Output from boost converter
The PV module provides 100kW (1000 W/m2) 80kW (800W/m2) 25kW (250 W/m2) and the boost converter convert 92kW, 74kW, 20 kW
Comparison of the measured output of PV module with output of boost converter
Simulation under different solar irradiance
Figure B shows the duty cycle of boost converter responding to different solar irradiance. In fact, an extreme variation of solar irradiance occur rarely.
The figure A shows the variations of solar irradiance (600 W/m2- 800 W/m2 - 400 W/m2 -600 W/m2)
(A) The measured output of PV Module (B) The respond of IC MPPT tracking algorithm
The figure shows the measurement output from boost converter. The figure shows the power, voltage, current of boost converter. Under (600 W/m2- 800 W/m2 - 400 W/m2 -600 W/m2) of solar irradiance, the booster maintains output voltage to be 500 V constantly.
Output from boost converter