PV System Design and Installation LO 5B - Solar Energy Fundamentals.

Slides:



Advertisements
Similar presentations
Series/Parallel Circuits Section Concepts Studied So Far Ohms Law: Victory Is Rare Power: P=IV KCL KVL.
Advertisements

PV System Design and Installation LO 8 – PV Electrical Design.
PV System Design and Installation LO 5A - PV Module Fundamentals.
+ V (Volt) = W (work done, J) Q (charge, C)
BASIC SOLAR CELL TESTING Basic Structure of a Solar Cell.
Introduction Since the beginning of the oil crises, which remarkably influenced power development programs all over the world, massive technological and.
ELEG 620 Solar Electric Power Systems March 4, 2010 Solar Electric Power Systems ELEG 620 Electrical and Computer Engineering University of Delaware March.
SOLAR CELL TESTING. SOLAR CELL TESTING Basic Structure of a Solar Cell.
ELEG 620 Solar Electric Power Systems February 25, 2010 Solar Electric Power Systems ELEG 620 Electrical and Computer Engineering University of Delaware.
LECTURE 4: RENEWABLE ENERGY
SOLAR CELL TESTING Basic Structure of a Solar Cell.
EE580 – Solar Cells Todd J. Kaiser
Special Diodes. Describe and analyze the function and applications of:  Zener Diodes.
Cells, Modules, and Arrays
2-4. Solar Panels.
Lesson 25: Solar Panels and Economics of Solar Power
SEMICONDUCTORS Zener diodes.
Lesson 24: Photocell Electrical Characteristic and Circuit Model ET 332a Dc Motors, Generators and Energy Conversion Devices 1Lesson a.pptx.
Internal resistance of battery
Basic Electronics II Series and Parallel Circuits.
Sustainable Energy Systems Engineering Peter Gevorkian Ch 2: Solar Power Generation Design Brevard Community College EST1830 Bruce Hesher.
Circuit Analysis of Circuits Containing Diodes. Definition of Diode Current and Voltage Forward Bias ▫When I D > 0mA and V D > 0V Reverse Bias ▫When I.
PV-DIESEL POWERED TRAINS
Twenty Questions Electricity 1. Twenty Questions
1 Materials for Energy Applications Group, Department of Mechanical Engineering, University of Western Macedonia, Kozani, 50100, Greece 2 Environmental.
Cells, Modules, & Arrays. Types of PV Cells/Products Single Crystal Multi or Polycrystalline Thin Film /Amorphous Silicon.
Power Generation from Renewable Energy Sources Fall 2012 Instructor: Xiaodong Chu : Office Tel.:
BY N.S.SRIVATCHAN ASSISTANT PROFESSOR EEE DEPT
Dimensioning and Protection of PV Plants with examples of design
Electrical Resistance and Ohm’s Law Electric circuits are used to convert electrical energy into some other form of energy we need.
Charge Controllers Regulating Battery Charging.
Morehead State University Morehead, KY Prof. Bob Twiggs Power Systems Design
PowerPoint ® Presentation Chapter 5 Cells, Modules, and Arrays Photovoltaic Cells Current–Voltage (I–V) Curves PV Device Response Modules and Arrays.
Renewable Power Generation Solar Photovoltaic (PV) Wind Energy Hydropower Solar Thermal Electric Geothermal.
Ch. 34 Electric Current.
Electricity. StaticCurrent Electricity occurs in 2 different forms.
Solar Energy Technology Science Summer Camp Session 9: Fri 9:00 AM - 12:00 N : Field trip to Energy Masters and Installing/Commissioning the System.
October 11,2013 ECEN 2060 Lecture 21 Fall 2013 Homework Problems\ Chapter 5 problems.
TECH 581 – Solar Energy Systems Summer 2009 Module 3-2 – Solar Electrical Effect of Temperature and Insolation on the PV I-V Curves As cell temperature.
Photovoltaic By-Pass Diodes (LTspice IV)
PV System Design and Installation LO 10 Performance Analysis and Troubleshooting.
Starter All resistors in a series circuit have the same _________________. All resistors in a parallel circuit have the same_________________. As you add.
BASIC SOLAR CELL TESTING Basic Structure of a Solar Cell.
درس تبدیل مستقیم انرژی I L : Light current I D : Diode current I SH : Shunt current k: Boltzmann constant N S : number of cells in series.
Electric Current Everything (water, heat, smells, …) flows from areas of high concentration to areas of lower concentration. Electricity is no different.
المــــركــز الوطنــــــي لبحــــــوث الطـــاقــــــة National Energy Research Center PV Modules Characteristics Diala Haddad MSc Energy and Sustainability.
Panel tracking keeping the panels very close to 90 degrees angle for maximum sunlight. These typically give you about a 15% increase in winter and up.
Photovoltaic Cell Fundamentals Fig 9.2 Photovoltaic cell schematic. Photovoltaic Cell Fundamentals.
Series/Parallel Circuits
Photovoltaic and Battery Primer
Photovoltaic and Battery Primer
Cells, Modules, & Arrays.
DESIGN OF PV SYSTEM INTERCONNECTED WITH EU
Photovoltaic Systems Engineering
SOLAR CELL TESTING. SOLAR CELL TESTING Basic Structure of a Solar Cell.
By: Raed Wa’el Ennab & Raja Sa’ed Anabtawi
Series Circuit – 1 bulb Series Circuit – 1 bulb.
Photovoltaic Systems Engineering Residential Scale – Part 2
How to Design and Implement a Reliable PV System which could last 30+ years ZAKI IQBAL SENIOR R&D ENGINEER RAK RESEARCH AND INNOVATION CENTER.
Photovoltaic Systems Engineering
Prof. Sukumar Mishra Indian Institute of Technology Delhi
BASIC SOLAR CELL TESTING
Topic H: Electrical circuits
Photovoltaic modules Session 6
“DESIGN OF GRID-CONNECTED PV SYSTEM”
Photovoltaic Systems Engineering
Comparing Series and Parallel Circuits
Photovoltaic Systems Engineering Residential Scale – Part 2
SOLARTECH SOLAR MODULE
Presentation transcript:

PV System Design and Installation LO 5B - Solar Energy Fundamentals

PV module Current-Voltage Curve I-V Curve Reference 3

Imp – Maximum Power Current, the current at the point On the I-V curve where the PV module produces Maximum power. At “knee” on I-V curve. Vmp – Maximum Power Voltage, the voltage at the point On the I-V curve where the PV module produces the Maximum power. At the “knee on the I-V curve. Reference 2 Module Performance Parameters Maximum Power Point Vmp Imp

Module Design Parameters Isc – Short Circuit Current, the maximum current where there is no voltage. Voc – Open Circuit Voltage, the voltage where there no current. Voc Isc

Reference 2 A different view

STC – Standard Testing Condition Irradiance = 1,000 watts/m2 Module Temperature = 25 deg C (77 deg F) PTC - PVUSA (utility consortium) Irradiance = 1,000 watts/m2 Ambient Temperature = 20 deg C Wind Speed = 1 meter/sec NOCT – Nominal Operating Cell Temperature Irradiance – 800 watts/m2 Ambient Temperature = 20 deg C PV Array: Open Circuit Wind Speed = 1 meter/sec Measurement Conditions for PV Cells and Modules

PV module Current-Voltage Curve I-V Curve Reference 3

Solar Intensity Module output is reduced with decrease in solar intensity (irradiance) Reference 2

Module output is reduced with increasing temperatures Reference 2 Temperature

Temperature Correction Formula

I-V Curve PV modules in Series Voltage of Array = Module Voltage x Number in Series Reference 2

I-V Curve - PV modules in Parallel Array Current = Module Current x Number in Parallel Reference 2

Where is Maximum Power Point for this array on the I-V Curve? Reference 3

Breakout into groups 1.Calculate for String and Array Isc (Short Circuit Current) Voc (Open Circuit Voltage) Imp (Max Operating Current) Vmp (Max Operating Voltage) 2. Provide information on temperature correction factors for voltage and current for the PV modules being used in the array. In Class Work Assignment

PV modules with lower current output will absorb current from modules with higher current output. Will lead to loss of power and potential overheating/damage of lower current PV modules Reference Class Book by Dunlop PV modules with different current outputs connected in series

PV modules with different output currents can be connected in parallel with no harmful effect if string voltages are the same. Reference Class Book by Dunlop PV modules with different current outputs connected in parallel

Impact of shading on PV array performance

Bypass diodes are placed in PV modules to prevent damage from shading. Limits reverse bias voltage to 0.7 volts Diodes allow current to pass around shaded or open circuit PV cell. However, negative impact on power production as string voltage is less. Bypass Diodes

Bipass diodes are typically installed across every 18 to 20 cells in a PV module Bypass diodes must be able to a)Handle maximum operating voltage for the number of modules/cells bypassed, b)Must be rated in excess of the maximum circuit current. More on Bipass Diodes

Shading will cause PV cell to act as a resistance in circuit. The cell develops a “reverse bias”. Cell continues to pass current but the voltage is negative in direction. High currents can lead to damaging levels of power dissipation through heat generation. Cell will dissipate power in the form of heat, possibly damaging PV module. Reverse bias conditions can also occur if, a)PV module is in open-circuit condition in a series, b)PV modules of different output current are put in series.. Reference Class Book by Dunlop Breakdown Voltage