Category Archives: Renewable Integration

Germany’s “Energiewende” may need to be rescued with nonrenewable coal power

Posted on November 10, 2016 by

[ Below is my summary of The Energiewende is Running Up Against Its Limits (October 24, 2016) by Jeffrey Michel at the Energy Collective. Wealthy, well-educated Germany has tried harder and longer than most nations to make a transition to renewables. … Continue reading →

Posted in National Super Grid, Renewable Integration | Tagged , , , , | 1 Comment

California could hit the solar wall

Posted on September 18, 2016 by

[ According to a Stanford University article below this introduction (followed by excerpts from two California Energy Commission reports), if California uses mainly solar power to meet a 50% Renewable Portfolio Standard (RPS), on sunny days, for most of the … Continue reading →

Posted in Photovoltaic Solar, Renewable Integration | Tagged , , , | 6 Comments

Wanted: Math geniuses and power engineers to make a renewable grid possible

Posted on May 13, 2016 by

Figure 1. OPF solution of original seven-bus system with generator at bus 4 offering high [The U.S. electric grid produces over two-thirds of its power with finite fossil fuels, and another 20% from nuclear power.   Since fossil fuels and uranium … Continue reading →

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Why the Grid is getting less reliable. House Hearing 2013.

Posted on February 25, 2016 by

House 113-40. May 9, 2013. Grid reliability challenges in a shifting energy resource landscape. U.S. House of Representatives. 176 pages. Mr. Jonathan A. Lesser, President Continental Economics, Inc. [This is a really good introduction to how the grid works and … Continue reading →

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Capacity value of solar is low as penetration increases which could suppress investment

Posted on June 5, 2015 by

Notes from 33 page: NREL. 2014. Representation of Solar Capacity Value in the ReEDS Capacity Expansion. National Renewable Energy Laboratory. Technical Report NREL/TP-6A20-61182 March 2014 Comparison of Capacity Value at High Penetration. Several researchers have conducted modeling efforts to quantify … Continue reading →

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The potential role of concentrating solar power in enabling high renewables

Posted on June 5, 2015 by

[The word “water” appears nowhere in this document, even though that’s a major limiting factor for CSP with thermal storage. Dry cooling is possible, but it lowers the EROI and raises the already way-too-high capital cost. An electric grid that’s … Continue reading →

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Wind, solar, and storage impact on the California grid

Posted on June 4, 2015 by

California Energy commission. June 2010. Research evaluation of wind generation, solar generation, and storage impact on the California Grid. 131 pages. Excerpts: This report analyzes the effect of increasing renewable energy generation on California’s electricity system and assesses and quantifies … Continue reading →

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Eastern Wind Integration & Transmission study 2011 National Renewable Energy Laboratory

Posted on June 4, 2015 by

Excerpts from the 242 page Eastern Wind Integration & Transmission study, 2011, EnerNex corporation for National Renewable Energy Laboratory. Key Findings Building transmission capacity takes much longer than installing wind plants. It is already starting to limit wind growth in … Continue reading →

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NREL. April 2012. Geothermal power and interconnection. The Economics of Getting to Market.

Posted on June 4, 2015 by

Excerpts from 44 page: NREL. April 2012. Geothermal power and interconnection.  The Economics of Getting to Market. National Renewable Energy Laboratory.  Technical Report NREL/TP-6A20-54192  [My comment: this is an excellent paper for understanding how the grid works, and why so … Continue reading →

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Short-circuiting a solar boom in Japan

Posted on March 4, 2015 by

Spain is still feeling the painful effects of the costs of overbuilt solar PV, and now Japan is finding itself in the same position.  This article does a lousy job of explaining that the grid must be in exact supply … Continue reading →

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