PVMD Delft University of Technology Learning objective 1. Maximum - PowerPoint PPT Presentation

Incremental Conductance Technique Ravi Vasudevan PVMD Delft University of Technology

Learning objective 1. Maximum Power Point Tracking 1. Introduction to MPPT 2. Indirect Methods 3. Perturb and Observe 4. Incremental Conductance 5. Cost and Overview 2. Cables 3. Batteries 1. Introduction to Batteries 2. Characteristics of Batteries 3. Charge Controller

How to Power-Point Track I P P MPP Current [A] Power [W] I SC I MPP MPP Voltage [V] V MPP V OC V

MPPT Techniques Indirect MPP Tracking Direct

MPPT Techniques MPP Tracking Direct

Looking at the I-V/P-V Curve I P P MPP Current [A] Power [W] I SC I MPP MPP Voltage [V] V MPP V OC V

Looking at the I-V/P-V Curve I P dP = P MPP 0 dV Current [A] Power [W] I SC I MPP MPP Voltage [V] V MPP V OC V

Looking at the I-V/P-V Curve I P dP = P MPP 0 dV Current [A] Power [W] I SC I MPP MPP dP > 0 dV Voltage [V] V MPP V OC V

Looking at the I-V/P-V Curve I P dP = P MPP 0 dV dP Current [A] < 0 Power [W] dV I SC I MPP MPP dP > 0 dV Voltage [V] V MPP V OC V

Conductance relates to dP/dV Conductance G = I / V

Conductance relates to dP/dV Conductance G = I / V dP d ( IV ) dI = = + I V dV dV dV

Conductance relates to dP/dV Conductance G = I / V dP d ( IV ) dI = = + I V dV dV dV D dI I If sampling steps are small enough: » Incremental G D dV V

Conductance relates to dP/dV Conductance G = I / V dP d ( IV ) dI = = + I V dV dV dV D dI I If sampling steps are small enough: » Incremental G D dV V D dP I » + I V D dV V Incremental Conductance

Conductance relates to dP/dV Conductance G = I / V dP d ( IV ) dI = = + I V dV dV dV D dI I If sampling steps are small enough: » Incremental G D dV V D dP I I » + - = I V I V V 0 D dV V Incremental Conductance VS Conductance

Comparing G to Incremental Conductance If

Incremental vs Instant Conductance I P dP = P MPP 0 dV dP Current [A] < 0 Power [W] dV I SC I MPP MPP dP > 0 dV Voltage [V] V MPP V OC V

Incremental vs Instant Conductance D I P I I = - P MPP D V V D I I Current [A] < - Power [W] D V V I SC I MPP MPP D I I > - D V V Voltage [V] V MPP V OC V

Block Diagram ΔI PV / ΔV PV = -I PV / V PV (at MPP) • ΔI PV / ΔV PV > -I PV / V PV (left of the MPP) • ΔI PV / ΔV PV < -I PV / V PV (right of the MPP) • IC Algorithm V PV (n-1,n) IF > V PN (n+1)>V PN (n) V PV (n+1) D IF = V PN (n+1)=V PN (n) I I ? - D I PV (n-1,n) V V IF < V PN (n+1)<V PN (n)

Conceptual Flowchart Start ΔV = 0? ΔI/ΔV = -I/V? ΔI = 0? ΔI/ΔV > -I/V? ΔI > 0? Increase Decrease Increase Decrease Voltage Voltage Voltage Voltage Return http://www.ni.com/white-paper/8106/en/

PVMD Delft University of Technology Learning objective 1. Maximum - PowerPoint PPT Presentation

Incremental Conductance Technique Ravi Vasudevan PVMD Delft University of Technology Learning objective 1. Maximum Power Point Tracking 1. Introduction to MPPT 2. Indirect Methods 3. Perturb and Observe 4. Incremental Conductance 5.

PVMD Delft University of Technology Introduction DNIcos(AOI) f(SVF, AOI, DHI) G Module GHI

PVMD Ren van Swaaij Delft University of Technology Learning objectives How is V oc related

PVMD Delft University of Technology Applica)ons of semiconductors Solar cells

PVMD Delft University of Technology Plasmonics in solar cells: learning objectives NPs behind

PVMD Delft University of Technology Learning objective 1. Maximum Power Point Tracking 1.

PVMD Miro Zeman Delft University of Technology Equilibrium Equilibrium The unperturbed state

PVMD Arno Smets Delft University of Technology Learning objectives What is a PIN junction

PVMD Delft University of Technology Energy of an 1 electron Preliminary

PVMD Arno Smets Delft University of Technology Learning objectives The what, how and why

PVMD Delft University of Technology Learning objectives How are Force, Energy

PVMD Delft University of Technology Learning objectives What is the function

PVMD Delft University of Technology Learning objectives What are the record efficiencies for lab

PVMD Delft University of Technology Atomic layer deposition C 1. C Al C Al Al Al C Al

PVMD Miro Zeman Delft University of Technology P-N Junction under Bias - + V a I I A P N

PVMD Olindo Isabella Delft University of Technology Plane of array PV modules irradiance

PVMD Delft University of Technology Stand-Alone System PV Panels Balance of System (BoS)

PVMD Delft University of Technology Chalcogenide solar cells 2 I II III IV V VI He 5 6

PVMD Delft University of Technology Learning objectives Effect of light concentration on the

PVMD Miro Zeman Delft University of Technology Derivation of light I-V characteristic of P-N

PVMD Delft University of Technology Learning objectives Single vs dual axis tracking

PVMD Miro Zeman Delft University of Technology Additional optical loss mechanisms 2 3 1 1.

PVMD Delft University of Technology Learning objectives 1. PV module design 2. Electrical

PVMD Olindo Isabella Delft University of Technology Learning objectives DC-DC converter 1.

PVMD Arno Smets Delft University of Technology Learning objectives What is amorphous