intermittent power

What Happens When a Solar Eclipse Takes 30GW of Solar Off-Line?

March 3, 2015 by Nigel Morris

Solar Reliability and Eclipses

The world is about to experience a fascinating experiment, when a solar eclipse hits Europe on March 20th, 2015. It’s not the first time Europe has experienced a major solar eclipse and had to deal with PV capacity being part of the mix, so they have some good lessons to model from the last one in 1999.[read more]

Northwest Wind takes a Week-Long Vacation

December 5, 2014 by Rod Adams

Energy Reliability and Renewables

Some readers don’t like it when I use the term “unreliables” to describe weather dependent power sources like wind and solar energy. But the wind is not under the control of automated systems or human operators, so it can disappear when it is most needed or blast in when it is not wanted.[read more]

Forget Intermittency: NREL Says Wind Energy Can Boost Grid Reliability

January 29, 2014 by Silvio Marcacci

Grid Reliability

We’ve all heard the warnings about how intermittent renewables could “crash” the grid if for instance all of a sudden the wind stops blowing and grid operators are left in the lurch for power when they need it. But what if wind turbines actually improve grid reliability?[read more]

Ten Reasons Intermittent Renewables (Wind and Solar PV) are a Problem

January 23, 2014 by Gail Tverberg

Intermittent Renewables Problems

Intermittent renewables–wind and solar photovoltaic panels–have been hailed as an answer to all our energy problems. Certainly, politicians need something to provide hope. Unfortunately, the more I look into the situation, the less intermittent renewables have to offer.[read more]

Intermittent Renewables and Electricity Markets

August 13, 2013 by Schalk Cloete

Renewables and Markets

Due to supply/demand fundamentals, intermittent renewables will sell at below-average prices even at low levels of penetration, implying that this tech will require generous subsidies even after grid parity is reached. This effect has shown itself in real-world markets.[read more]

Replacing nuclear with wind power: Could it be done?

May 10, 2012 by Joseph Koblich

Many people would like it to be theoretically possible to replace nuclear power with wind power, since the wind is a free resource. The way that I would like to approach the topic is to not discuss the source of power, but to discuss this question from the perspective of “intermittency.” Stating the question another way: Can an...[read more]

Commercial Compressed-Air Energy Storage Plant In Development?

March 31, 2011 by Michael Giberson

Wind power RFP processes* are common enough these days, typically driven by renewable energy mandates placed on utilities. A recent wind power RFP announcement out of Santa Fe, New Mexico, is different. A new company, Chamisa Energy, has initiated an RFP seeking wind power to pair up with a planned compressed-air energy storage (CAES)...[read more]

Impacts of Variable, Intermittent Power on Grids

November 11, 2010 by Willem Post

The increased generation of variable, intermittent wind power will present a challenge to the management of the power on the New England Electric Grid, NEEG. Because wind power is variable and intermittent, spinning reserves (nuclear plants, regulation velocity less than 1%/min, thermal plants, 1%/min; combined cycle gas turbines, 2.5%/...[read more]

A Story of Power in Venezuela

January 12, 2010 by Margaret Harding

Originally posted May 2009, given today’s news about Venezuela’s electricity woes, it seems appropriate to repost. I predict sales of diesel generators to do up exponentially across Venezuela on the heels of this news. This is not just a parable, but a true story, not something made up by me to provoke discussion. I personally know the...[read more]