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

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

Feb 07, 2024 427 likes •605 views

Indirect MPPT Methods 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

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SLIDE 1

PVMD

Delft University of Technology

Indirect MPPT Methods

Ravi Vasudevan

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SLIDE 2

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

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How to Power-Point Track

Voltage [V] Current [A] V I VMPP VOC ISC IMPP PMPP MPP Power [W] P

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Using control logic with an MPPT MPPT Logic

Input VPV

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SLIDE 5

MPPT Techniques

MPP Tracking

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MPPT Techniques

MPP Tracking Indirect Direct

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SLIDE 7

MPPT Techniques

MPP Tracking Indirect Direct

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SLIDE 8

MPPT Techniques

MPP Tracking Indirect

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Constant Voltage Method

  • Using the specs of the PV array, apply the voltage that gets the MPP
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Constant Voltage Method

  • Using the specs of the PV array, apply the voltage that gets the MPP
  • Still need a control in place for different load conditions
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Constant Voltage Method CV Algorithm

VPV(n) VPV(n+1)

  • Using the specs of the PV array, apply the voltage that gets the MPP
  • Still need a control in place for different load conditions
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Changing MPP with Irradiance

200 W/m2 400 W/m2 600 W/m2 1000 W/m2 800 W/m2

MPPs Voltage [V] Current [A] V I

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Fractional Open Voltage Method

  • VMPP is a distinct fraction of the VOC
  • Typical values are from 70-80%
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Fractional Open Voltage Method OV Algorithm (fraction is hard-coded)

VPV(n+1)

  • VMPP is a distinct fraction of the VOC
  • Typical values are from 70-80%

VPV(n) VOC

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Short Current Pulse Method

  • Similar to open voltage issue, except with current
  • Typical values are 92%
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Short Current Pulse Method SC Algorithm (fraction is hard-coded)

VPV(n+1)

  • Similar to open voltage issue, except with current
  • Typical values are 92%

IPV(n) ISC VPV(n)