An empirical study of the merit order effects in the Texas energy market via quantile regression
by Mary Rudolph; Paul Damien; Jay Zarnikau
International Journal of Advanced Operations Management (IJAOM), Vol. 13, No. 3, 2021

Abstract: The merit order effect is the tendency for non-dispatchable renewable energy generation (wind and solar), or baseload generation (nuclear) to lower wholesale market prices by shifting supply curves. To better quantify real-time pricing, this paper examines how the merit order effects vary with the level of wholesale electricity prices in all the eight zones that comprise the Electric Reliability Council of Texas (ERCOT). To accomplish this goal, the merit order effects due to nuclear, wind and solar energy resources are quantified. This research finds that when wind generation increases by 10%, median prices ($/MWH) in the North region of ERCOT decline by 1.47%, 1.04% and 1.24% for hours 3 am, 11 am and 4 pm, respectively. The corresponding decline in median prices in the West region is 1.86%, 1.34% and 1.73%. These impacts vary considerably within ERCOT. Using these, and attendant findings, policy implications from the analysis are discussed.

Online publication date: Mon, 24-Jan-2022

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