pv power system sizing and configuration
DESCRIPTION
PV Power System Sizing and Configuration. Unit 7. Use Policy. This material was developed by Timothy J. Wilhelm, P.E., Kankakee Community College, with funding from the National Science Foundation as part of ATE Grant No. 0802786. - PowerPoint PPT PresentationTRANSCRIPT
ELTR 1223Survey of Renewable
Energy Technology
PV Power System Sizing and Configuration
Unit 7
Source:
Use Policy This material was developed by
Timothy J. Wilhelm, P.E., Kankakee Community College, with funding from the National Science Foundation as part of ATE Grant No. 0802786.
All materials in this presentation are designed and intended for educational use, only. They may not be used for any publication or commercial purposes.
Source:
Author, Editors/Reviewers Author: Timothy J. Wilhelm, P.E.,
Kankakee Community College Editors/Reviewers / Modifier: Chris Miller Heartland Community
College
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Objectives Students will be able to describe, in
very simple terms, at least three differences ( hardware differences and/or operational differences) between a pure grid-tied solar-PV system and a stand-alone solar-PV system.
Students will be able to list, and briefly describe (in very simple terms), the basic steps for sizing a stand-alone solar-PV power system.Source:
Objectives Students will be able to describe, in
very simple terms, the general construction of a pure grid-tied solar-PV power system, listing its basic components.
Students will be able to describe, in very simple terms, electric motor effect and electric generator effect.
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Objectives Students will be able to describe, in
very simple terms, how motor effect creates back-torque in an electric generator.
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Simple Utility-Tied System
Source: http://www.rhoduselectric.com/images/10-14-08/Solar_Electric_Systems.jpg
Utility-Tied PV System is very simple, with few
components. System is sized almost strictly by budget.
“How much can you afford to buy?” System is modular and expandable in
building-block-increments. System does NOT provide back-up power
when utility shuts down. Can be configured to provide back-up
power; but, involves additional equipment and more expense.
PV voltage approaches 600VDC!
Utility-Tied PVParts and Pieces
PV Modules and interconnect wiring. Racks for mounting PV array. Combiner boxes for parallel connection
of series strings of PV modules. GFP for roof-mounted, residential
arrays. Grid-tie inverter. Lockable, outside disconnect. Properly sized bi-directional breaker in
distribution panel.
PV Modules
PV Module Interconnects
Source: http://www.mrsolar.com/Merchant2/graphics/product/wiring/blue_unconnected.jpeg
PV Mounting RacksBallasted Pans for Flat Roof
PV Mounting RacksFixed Racks for Pitched Roof
PV Mounting RacksFixed Racks for Pitched Roof
PV Mounting RacksFixed Racks for Pitched Roof
PV String Combiner Box
Grid-Tie Inverters
Source: http://www.altestore.com/store/descfiles/xantrex/inverters/gt3/Xantrex_grid_tie.jpg
Source: http://hitechplumbingcorp.com/sitebuilder/images/SMA3000_Prod_sb3000us_md_20070727112949-167x174.jpg
Grid-Tie Inverters, Lockable AC Disconnect
Inverter Output to Main Panel
Lockable Disconnect!
Simple Stand-Alone System
Source: http://homepower.com/images/basics/Basics_SolarElect_OffGridFlow.jpg
Stand-Alone PV System is more complex and more
expensive than pure grid-tie. System is sized by load analysis. System is modular and expandable in
building-block-increments. System IS back-up power when utility not
available. Requires monitoring and battery
maintenance. You must operate within your ENERGY
budget. PV voltage typically 12VDC, 24VDC or
48VDC, nominal.
Stand-Alone PV -- Parts and Pieces
PV Modules and interconnect wiring. Racks for mounting PV array. Combiner boxes for parallel connection
of series strings of PV modules. GFP for roof-mounted, residential
arrays. PV Charge Controllers. Batteries. Inverter/Charger. Load Center. Disconnects and OCP, everywhere.
PV Charge Controllers
Source: http://www.readymaderesources.com/cart/images/uploads/xw60-150.jpg
Source: http://www.exploroz.com/images/Articles/349_Image1__TN180x200.jpg?6996
Source: http://www.enviroharvest.ca/images/Outbackmx60Controller.gif
Batteries Lead Acid Cells are Standard
Flooded cell
Gel Cell SMF
AGM SMF
Batteries
Source: http://www.electric-cars-are-for-girls.com/images/6-volt-golf-cart-battery-Trojan-T-105.jpg
Source: http://suntolight.com/imagenes/productos/S24SLD.jpg
Source: http://shop.solardirect.com/images/pv-concorde-battery-d.gif
Inverter/Chargers
Source: http://www.alternativeenergydiscounthouse.com/images/products/VFX3648.jpg
Source: http://www.msmelectric.com/mediac/400_0/media/Xantrex_SW.JPG
Put the pieces together…
Source: http://img.diytrade.com/cdimg/476964/2901505/0/1162516202.jpg
Sizing a Stand-Alone System See In-Class Worksheet Do you have proper solar access? Do your load analysis. Size your battery – days of autonomy. Size your PV array – recharge in a
day (or two, max.) Size system for worst-case
conditions!
Grid-Tied with Batteries
Source: http://homepower.com/images/basics/Basics_SolarElect_GridBBFlow.jpg
Final Notes Illinois now has mandatory net-
metering! If you have utility available, USE IT! 30% investment tax credit for next 8
years! 50% grants/rebates available from
State (maybe)! Production tax credit?
Let the Sun Shine!