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What Moves the Ex Post Variable Profit of Natural-Gas-Fired Generation in California?

Chi-Keung Woo, Ira Horowitz, Jay Zarnikau, Jack Moore, Brendan Schneiderman, Tony Ho, and Eric Leung

Year: 2016
Volume: Volume 37
Number: Number 3
DOI: 10.5547/01956574.37.3.cwoo
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Abstract:
We use a large California database of over 32,000 hourly observations in the 45month period of April 2010 through December 2013 to document the ex post variable profit effects of multiple fundamental drivers on natural-gas-fired electricity generation. These drivers are the natural-gas price, system loads, nuclear capacities available, hydro conditions, and renewable generation. We find that profits are reduced by increases in generation from nuclear plants and wind farms, and are increased by increases in the natural-gas price and loads. Solar generation has a statistically insignificant effect, although this will likely change as solar energy increases its generation share in California's electricity market. Our findings support California's adopted resource adequacy program under which the state's load-serving entities may sign long-term bilateral contracts with generation developers to provide sufficient revenues to enable construction of new natural-gas-fired generation plants.



A Survey of Capacity Mechanisms: Lessons for the Swedish Electricity Market

Par Holmberg and Thomas Tangeras

Year: 2023
Volume: Volume 44
Number: Number 6
DOI: 10.5547/01956574.44.6.phol
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Abstract:
Many electricity markets use capacity mechanisms to support producers. Capacity payments can mitigate imperfections associated with "missing money" in the spot market and solve transitory capacity shortages caused by investment cycles, regulatory changes, or technology shifts. We discuss capacity mechanisms used in electricity markets around the world. We argue that correctly designed strategic reserves are likely to be more efficient than market-wide capacity mechanisms in jurisdictions that rely on substantial amounts of variable renewable energy and hydro power for electricity supply, such as Sweden.





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