Fall 2015 ASL Preseason Meeting 2015 ASL Preseason Meeting1.
Meyer ASL Sustainable Solutions
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Transcript of Meyer ASL Sustainable Solutions
The Dynamics of Solar Photovoltaic Systems and Integration with
Electric Vehicle Charging
Energy & Sustainability Solutions- ASLRachel Meyer
Project Leads-Robert Cormia and Joel Kubby
Relevance NASA’s climate change investigations and
mitigation of repercussions Improving PV systems and integration with
EVs in order to decrease carbon intensity Green energy and solar improvements in
Silicon Valley (i.e. Cisco’s 20 year PPA supplying about 9% of its power from solar PV during peak demand)
Microgrids and “managed” grids
Objectives
Research questions to address: Is the addition of 14 electric vehicle (EV)
charging ports a viable option for Foothill? What are the benefits and disadvantages
of such an addition? How would this addition affect Foothill’s profile economically and in terms of emissions? Would more PV cells be needed?
In the bigger picture, how will distributed solar affect the grid? What are possible solutions to the subsequent problems?
Background Foothill has 1,540kW (nameplate) solar photovoltaic
installed Data collected:
energy generated by solar panels energy demand of the school unused energy pushed back into the grid
Foothill’s Demand Curve
Foothill’s Single-Day Demand Curve
Cool, sunny day = more efficient solar cells 6 hours of overproduction
Overproduction from PV
Factors to Consider with Solar & EV Charging Impacts on the system and grid
Large quantities of unused energy can overload the grid, cause voltage regulation problems
Economic Impacts Earnings from selling to grid vs. profits from EV
charging Environmental Impacts
Electricity from grid is less carbon-intense during night so storage for use at night is not crucial. Instead, using left-over electricity for charging EVs could be more environmentally constructive.
Storage and solar size options
Projected Outcomes
What this data can show in the bigger picture: Optimum times and conditions for EV charging Effects of solar and EV charging on grid and
environment Costs and profits associated with solar and EV
charging How current systems can be modified to
increase efficiency and effectiveness
Resources Sources of data and graphics include:
Foothill’s Gridium RCx profile Opterra UtilityVision profile PG&E interval data
Special Thanks
Peter Minogue- NASA ASL & UC Santa Cruz
Mike Oye- UC Santa CruzJoel Kubby- UC Santa Cruz
Robert Cormia- Foothill College