20
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.

What is MPPT and why it is needed? (Maximum power point tracking)

Embed Size (px)

DESCRIPTION

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 - PowerPoint PPT Presentation

Citation preview

Page 1: What is MPPT and why it is needed? (Maximum power point tracking)

• 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.

Page 2: What is MPPT and why it is needed? (Maximum power point tracking)

PV Model• A solar cell basically is a p-n semiconductor

junction. When exposed to light, a dc current is generated.

Page 3: What is MPPT and why it is needed? (Maximum power point tracking)

PV Characteristic

Page 4: What is MPPT and why it is needed? (Maximum power point tracking)

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

Page 5: What is MPPT and why it is needed? (Maximum power point tracking)

Block Diagram of the Proposed PV System

PV ARRAY

BOOSTCONVERTER

PVINVERTER

3-PHASEGRID

IC MPPT CONTROL

I

V

PV INVERTERCONTROL

AC

DCDC

Page 6: What is MPPT and why it is needed? (Maximum power point tracking)

SIMULATION SYSTEM

Page 7: What is MPPT and why it is needed? (Maximum power point tracking)

Under mask the system

Page 8: What is MPPT and why it is needed? (Maximum power point tracking)

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

Page 9: What is MPPT and why it is needed? (Maximum power point tracking)

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

Page 10: What is MPPT and why it is needed? (Maximum power point tracking)

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

Page 11: What is MPPT and why it is needed? (Maximum power point tracking)

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).

Page 12: What is MPPT and why it is needed? (Maximum power point tracking)

(A) The measured output of PV Module (B) The respond of IC MPPT tracking algorithm

Page 13: What is MPPT and why it is needed? (Maximum power point tracking)

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

Page 14: What is MPPT and why it is needed? (Maximum power point tracking)

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

Page 15: What is MPPT and why it is needed? (Maximum power point tracking)

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)

Page 16: What is MPPT and why it is needed? (Maximum power point tracking)

(A) The measured output of PV Module (B) The respond of IC MPPT tracking algorithm

Page 17: What is MPPT and why it is needed? (Maximum power point tracking)

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

Page 18: What is MPPT and why it is needed? (Maximum power point tracking)

The power efficiency is approximately 90%. The simulation result shows the MPPT works and respond fast and well even in any behavior of solar irradiance and also gain a high efficiency

Comparison of the measured output of PV module with output of boost converter

Page 19: What is MPPT and why it is needed? (Maximum power point tracking)

PV module connected to gridThe simulation is under 1000 W/m2 of solar irradiance.

Output voltage of PV Inverter

Output voltage of load

Page 20: What is MPPT and why it is needed? (Maximum power point tracking)

The figure shows the voltage after connected to the grid. to phase A-B in 25 kV voltage level.

Output voltage of grid