I was particularly curious to find out which generator was the lowest priced of them all in 2016.
By my measurements, it is Bruce Power.
While I was anxious to see the annual figures in this old format, what impacted me the most from the graphic is that 10 years ago there was some consistency in pricing. Since that time there's been some movement in public OPG's pricing of its traditional hydro-electric and nuclear assets, even less change at nuclear Bruce Power, but enormous changes in the average cost of "other Ontario" generation.
Explaining the changes required some explanation of the data, my methodology, and the changes in the composition of "other" generators. Upon creating the explanations, I realized I could improve my original spreadsheet. If you see some variations to my previous posts, it's because this is the improved version.
The data for this work comes from:
- annual reports for companies owning portions of Bruce Power (currently only TransCanada produces publicly accessible reporting, but previously CAMECO also had a position)
- annual financial reporting for OPG
- annual summaries of IESO hourly data, for Ontario Demand, exports, and imports, all costed at the Hourly Ontario Energy Price (HOEP)
- embedded generation annual totals from the IESO's Ontario Planning Outlook as available, with my own estimate for 2016 - this generation is valued at the weighted (by demand) average HOEP for the year for the purposes of determining a total system cost.
Basically the few items that produce the majority of Ontario's generation are examined as simply as possible (based only of revenue and generation), and what is left is determined by separately calculating the total collected for the system (the market value plus the global adjustment).
These figures do not account for total Watt-hours of curtailment (avoided production), but the costs of curtailment is contained in the global adjustment and therefore total system revenues. My accounting could be considered unfair, but I use this approach to avoid using posted rates that can't be used to determine actual consumer expenses (which is the same as producer revenues).
The following 3 graphics show the share of total generation (transmission, distributed/embedded and imported) and the share of total costs for each of:
- Bruce Power
- OPG's Hydro (regulated and unregulated) and Nuclear business segments
- all other generators in Ontario (omitting imports and conservation spending)
If that's not stark enough yet, here's another view - this time just costs:
The cost of all Ontario electricity supply increased by approximately 6.4 billion, 65% of which could be attributed to growth in cost that were neither nuclear nor legacy public hydro.
Public power does not necessarily mean cheaper power - at least not new public power. OPG has reorganized its business segments in recent years. The old thermal segment was primarily coal-fired generation, and Lennox (oil and natural gas acting, essentially, as an emergency reserve). Today Lennox is contracted, as are Thunder Bay and Atikokan (coal units converted to biomass). These generators share a new "Contracted" business segment with recent hydro-electric projects co-owned with First Nations. All contracts are private, and apparently most are expensive - as can be seen by separating this component from the remainder of "Other ON".
"Other" in my accounting includes both capacity contracting and energy contracting. Coal provided both of these things for around $2 billion.
Ontario replaced coal-fired generation twice, and that's one part of the reason costs tripled for this category: the capacity resources that are minor contributors to rate increases, while more expensive wind and solar contracts are the majority of the cost. With production not dropping as demand has, much of the production for intermittent renewable energy systems has been exported, or curtailed; what hasn't been dumped is displacing potential gas-fired generation from the capacity resources.
The last issue I'll discuss in this post deals with the blue area in the previous graphic. This is the estimated average rate paid for generation in Ontario (including imports). The average rate is shown as increasing from $54/MWh to $91/MWh, but as noted in my previous post, the increased cost is not distributed to all market segments proportionally. From 2006-2016 the average rate increased 74-75%, but over the same period there was a 113% rise in "class B" rates (essentially including the Regulated Price Plan rates applied to residential consumers).
This post, and the previous one, looked in difference ways at the changes that led to today's high rates. Both posts noted rate increases have been significantly due to newer generation, primarily wind and solar, and both posts noted different consumer segments have been impacted differently as not all segments have borne the weight of all price increases.
The next post will look at recent announcements indicating how the government intends on addressing costs prior to the next election campaign.
Most of the graphics in this post are generated from various component totals calculated from this data set: