Microgrid Categories for Quality Standards, Training, and Capacity Building

by Marilyn Walker, Ph.D. 10.08.2014

One of the great challenges facing the growing microgrid market is the wide range of applications, climates, cultures, resources, and costs associated with a highly dispersed market. The HOMER® microgrid optimization software is a useful tool for determining which particular technology combination and configuration may be economical and effective for microgrid projects of all types […]

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Using HOMER to Model Advanced Inverter Technology in Solar-Plus-Storage for Boulder, Colorado

by Marilyn Walker, Ph.D. 08.08.2014

Solar plus storage has been pegged as a game changer for the grid-connected world, offering a mechanism that allows much higher penetrations of renewable energy than simple rooftop PV. Additionally, properly controlled solar plus storage systems can deliver many additional values including demand-response and increased reliability, taking over when the grid is not available. HOMER […]

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Village Power – Back to HOMER’s Roots of Remote Hybrid Renewable Microgrids

by Marilyn Walker, Ph.D. 07.22.2014
Village Power Meter System

The HOMER software is now in use throughout the world, for hybrid renewable power systems of all sizes. But HOMER’s roots at the National Renewable Energy Laboratory were in village power, and HOMER Energy has recently been involved with a few village power projects that reminded us that 1.5 billion people still live without electricity, […]

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Strawman Proposal for a Taxonomy of Renewable Penetration Levels

by Peter Lilienthal, Ph.D. 09.20.2013
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This strawman taxonomy provides clear distinctions between different levels of renewable penetration.  By basing the criteria on the architecture and control of the power system, it avoids the ambiguity that is inherent in a taxonomy based on the percentage of renewable penetration or contribution.  Not only is the renewable penetration or contribution subject to multiple […]

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Call for Papers: Microgrid Deployment Forum

by Marilyn Walker, Ph.D. 07.11.2013
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HOMER Energy will convene the Microgrid Deployment Forum 2013 in Cancun, Mexico, November 8 and 9 2013, in conjunction with the Solar World Congress, sponsored by the International Solar Energy Society. The Microgrid Deployment Forum 2013 is a two-day event that carefully examines the business models, optimal technology mix, and critical steps for successfully deploying […]

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Lifestyle Change: The 3rd Rail of Clean Energy

by Peter Lilienthal, Ph.D. 07.08.2013
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Nobody likes being told what to do. Clean energy was probably set back a decade when Jimmy Carter told us all to wear a sweater. Now Barack Obama is telling us we don’t have to wear a jacket. Hopefully, that is better.  Without behavior changes, the transition to clean energy requires investments in new technologies. […]

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HOMER Software Training Institute Held

by Marilyn Walker, Ph.D. 06.24.2013
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The first HOMER Software Training Institute was held at HOMER Energy headquarters in Boulder, Colorado, on June 13 and 14, 2013. The first day focused on the basic principles of hybrid renewable microgrids using HOMER Explorer, and the second day explored advanced topics with HOMER 2. HOMER, or Hybrid Optimization of Multiple Energy Resources, is […]

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The Problem with 100% Renewable Energy

by Peter Lilienthal, Ph.D. 04.24.2013
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The New York Times reported recently on the work of a group of Stanford researchers, who published a piece in the journal Energy Policy claiming that the main issues with 100% renewables are neither economic nor technical but rather social and political will. Jesse Berst of Smart Grid News countered with a title that included […]

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How to Classify Microgrids: Setting the Stage for a Distributed Generation Energy Future

by Peter Lilienthal, Ph.D. 04.02.2013
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In this post by HOMER CEO Dr. Peter Lilienthal, we consider the problem of how to classify microgrids. This is a special entry in our microgrid learning series. Although microgrids are becoming more and more prevalent in both the press and in energy world, there is no common definition of exactly what constitutes a microgrid […]

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Virgin seeks proposals for renewable energy project on Sir Richard Branson’s Necker Island

by Marilyn Walker, Ph.D. 02.13.2013
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http://pdf.reuters.com/htmlnews/8knews.asp?i=43059c3bf0e37541&u=urn:newsml:reuters.com:20130212:nBw126722a WASHINGTON–(Business Wire)– The Carbon War Room (CWR), Homer Energy, and Reznick Think Energy, LLC (RTE) launched a request for proposals (RFP) today on behalf of Virgin Limited Edition for the provision of renewable energy and energy services on Necker Island in the British Virgin Islands, home of Sir Richard Branson. The goals of the […]

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Will the real microgrid please stand up? (What is a microgrid and why should I care?)

by Marilyn Walker, Ph.D. 10.29.2012
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This is the second post in the HOMER Energy Microgrid Learning Series, designed to help the layperson understand what microgrids are and why they will soon be a household word. Microgrids are independent energy systems that provide grid backup or off-grid power. A slightly more technical definition is a local power network that uses distributed […]

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Smart Microgrids: Scripps Ranch Recreation Center Microgrid Installed

by Marilyn Walker, Ph.D. 10.02.2012
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After careful planning (and wise application of the HOMER software), the City of San Diego, California now has a smart microgrid. The solution, commissioned by Princeton Power, integrates a 30kW photovoltaic (PV) array with a 100 kilowatt hour lithium-ion battery, which is designed to keep the facility running in the event of a power outage. […]

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