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

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# What is MPPT and why it is needed? (Maximum power point tracking) - PowerPoint PPT Presentation

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

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

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Presentation Transcript

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

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.
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

• 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

Output from boost converter

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.

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

The PV module provides 100kW and the boost converter convert 92kW of energy

The figure shows the decreasing solar irradiance (1000 W/m2- 800 W/m2 -250 W/m2).

(A) Decreasing of solar irradiance(B) Duty cycle of boost converter

Output from boost converter

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.

Comparison of the measured output of PV module with output of 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

The figure A shows the variations of solar irradiance (600 W/m2- 800 W/m2 - 400 W/m2 -600 W/m2)

Figure B shows the duty cycle of boost converter responding to different solar irradiance.

In fact, an extreme variation of solar irradiance occur rarely.

Output from boost converter

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.

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

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

PV module connected to grid

The simulation is under 1000 W/m2 of solar irradiance.

Output voltage of PV Inverter