Discussion about this post

User's avatar
Isaac Orr's avatar

Excellent question Nathan. We address this as a load balancing cost that we attribute to wind and solar. We also look at using battery storage for this purpose but it is prohibitively expensive so we usually cost optimize by overbuilding and curtailing. Check out Section V on the LCOE of different power plants in this report.

https://files.americanexperiment.org/wp-content/uploads/2022/09/The-High-Cost-of-100-Percent-Carbon-Free-Electricity-by-2040-in-Minnesota.pdf?v=1663000647&_gl=1*b5r49q*_ga*MjA5MTM5ODM3LjE3MDU2MjY2ODA.*_ga_03BRYTYNY0*MTcwNjM2ODg5Ny40LjEuMTcwNjM2ODk2Ni41MS4wLjA.

Expand full comment
Nathan Taylor's avatar

Good conversation, gents.

Isaac, how do you incorporate reserves into your model, both online and offline reserves? All those on the left who analyze renewables to promote policy ignore not only the high cost but also the intense value of having readily available offline quick start resources to turn on when wind suddenly drops or a few clouds pass over a larger solar park (heaven forbid the two events coincide). Also, in the northern latitudes a freezing fog event can take out both wind and solar at once. What do you have left but on demand thermals... or hydro. Many promote batteries as the future, but they a duration limited and an extended event will quickly deplete that resource. Check out the ferc form 1 data on Plains End. It lies between Golden and Boulder in Colorado. It looks like it seldom is run. The value this plant provides is in the offline reserves category. Cheaper resources can be ramped up beyond a reserve margin if this plant is available offline. How does one quantify that value? It is real and it is huge and it is ignored by most who analyze and model power systems. The ISOs have a supplemental reserve product in addition to spinning reserve and energy. Colorado does not partake in an ISO currently. I'm convinced the ISO undervalue supplemental reserve anyway.

Expand full comment
8 more comments...

No posts