Site C is a hydroelectric project in British Columbia that may soon to be cancelled.
The commentary surrounding the Site C project has been driven by political posturing, and a recent change in government is therefore likely to end, at least temporarily suspend, the project. The situation is worth commenting on from afar because while it's B.C. today, in another time and other places some different - and many of the same - people will be discussing the merits of big, public, baseload power projects and small, private, sporadic power projects.
"BC Hydro’s Site C Clean Energy Project will be a third dam and hydroelectric generating station on the Peace River in northeast B.C. It will provide 1,100 megawatts (MW) of capacity, and produce about 5,100 gigawatt hours (GWh) of electricity each year..." BC Hydro
I have 4 questions I wish to address in discussing the future of Site C:
- Will there be a need for capacity?
- Will there be a need for energy?
- What are the costs and benefits of a Power Purchase Agreements (PPAs) with Independent Power Producers (IPPs)?
- What are the costs and benefits of publicly owned generation assets
While Site C would have a reservoir (9,300 hectares), the main energy store for the system would remain the Williston Reservoir (177,300 hectares) upstream on the same system. It's not surprising the site would generate 5,100 GWh annually as the implied 53% capacity factor
[1] is essentially what the B.C. hydroelectric fleet achieves annually.
[2]
Many of those claiming Site C won't be necessary comically follow that argument up with a list of alternative generation technologies. To evaluate the alternatives it is first necessary to determine the value Site C may provide.
B.C. currently has adequate supply - it's
peak "load" occurred early in 2017, and the province was a net exporter of power during that peak (as it is during most peaks). BC Hydro's resource planning anticipates the ability to meet the peaks to become less certain, and disappear around 2023. The need for additional annual energy is predicted to come later. The difference between the ability to meet peaks and the ability to provide enough energy throughout the year is important.