maximum power point tracking for pv cells using...

Maximum Power Point Tracking (MPPT) for PV cells using artificial

intelligence and PID controller based system

Presented by:

Ninad Mehendale

Ninadsresearchlab.weebly.com

PV cell

http://www.rids-nepal.org/images/stories/projects/solar_photovoltaic/how_pv_works.jpg

Maximum Power Point Tracking

Existing MPPT

http://bryanwbuckley.com/images/projects/mppt/mppt_block.jpg

Controlled battery charging

ADC (10 bit)

Parameters monitored

The red curve is the solar input, showing also a dotted line cosine function. The blue is load curve showing also a large contribution in the afternoon. The black line is the battery, referenced to the scale on the right.

Parameters monitored daily and monthly (Power)

Feature: Artificial intelligence

• What is current maximum power measured?If MPPT set point <Measured maximum powerThen MPPT new set point = Measured maximum power

• Is battery discharged ?If battery goes below 5.7V override all and connect panel to battery for charging

• What is the average maximum power measured in a month?

The power in June is more than that of power in December Hence MPPT new set point = Measured average power for a month

Feature: Microcontroller based PID

PID set point (3 Days)

16.75

16.8

16.85

16.9

16.95

17

1 2 3

Vmax(V)

Vmax(V)

PID set point (3 Days)

0.554

0.556

0.558

0.56

0.562

0.564

0.566

0.568

0.57

0.572

1 2 3

Imax(A)

Imax(A)

PID set point (3 Days)

0.594

0.596

0.598

0.6

0.602

0.604

0.606

0.608

0.61

0.612

1 2 3

Isc(A)

Isc(A)

PID set point (3 Days)

20.8

21

21.2

21.4

21.6

21.8

22

22.2

1 2 3

Voc(V)

Voc(V)

PID set point (3 Days)

9.42

9.44

9.46

9.48

9.5

9.52

9.54

9.56

9.58

9.6

9.62

1 2 3

Power(W)

Power(W)

Vmax Imax Isc Voc Power

16.88

0.5666 0.603

21.5

9.5651

0.0043

0.000033 0.000033

0.19

0.0042

Setpoints

Parameters Value Variance

Vmax 16.88 0.0043

Imax 0.5666 0.000033

Isc 0.603 0.000033

Voc 21.5 0.19

Power 9.5651 0.0042

PID set point (3 Days)

Parameters monitored: Battery Voltage

Parameters monitored: Panel voltage and current

Power computation P=V*I

Feature: PWM Charged controller

Feature: PWM Charged controller

Feature: Relay as switch

Feature: Relay as inductor

Feature: DC-DC Converter

Feature: DC-DC Converter

Feature: Unidirectional current

Feature: Battery discharge override

Application: Improved Battery life