By one accounting, which I’ll show is an Auditor General’s.
It’s been a while since my last post, during which period this blog turned 10. A decade ago, this month, a Premier noted some people think discussing losses on exports is fun, and at the same time lectured, “what you want to do of course is try to manage your system as best as you can so that there's as little extra electricity as possible.” Looking at the longer trend with the benefit of hindsight will be fun (of course), and as an added benefit it will provide a measure of the quality of the system’s managers.
Last month I was contacted by a friend looking to update claims from the 2015 Annual Report of the Office of the Auditor General of Ontario (the Auditor), including:
From 2009 to 2014...Ontario exported 95.1 million MWh of power to other jurisdictions, but the amount it was paid was $3.1 billion less than what it cost to produce that power
From a statistics viewpoint the biggest part of this challenge is figuring out what that $3.1 billion claim was based on. It turns out it’s demonstrated by Figure 10 in that 2015 report - and now we descend into the sordid world of Ontario’s electricity data to determine the origins of the numbers visualized in that graphic.
I’ve added a tabular table which shows the figures I transcribed from the Auditor’s Figure 10 - not a precise process but one that provides valuable estimates for what is visualized. The difference between the cost of production and revenues in the graphic equal $3.1 billion. Before discussing the “cost of producing Exported Power...as estimated by [Office of the Auditor General of Ontario]” I will note both figure 5 and figure 10 in the 2015 Auditor’s report cite the IESO (Ontario’s hybrid electricity system operator) as the source of revenue from exports: figure 5 prints the figure for 2014 as $636 million while my transposition of the graphics - -done as it’s clearly not that - puts the figure a little below $750 million.
Same source, same measure, same year: two numbers. I’ll revisit this after I discuss a methodology behind the cost of producing exported power that reproduces the results graphed in the Auditor’s Report.
To determine an average annual price, per unit, of power the total cost is divided by the annual total market demand. The auditor determined the market’s valuation of power as the SUM of ([Market Demand]*HOEP]) plus the annual global adjustment charge (which is, or at least was, a charge in Ontario to recover the full cost of purchasing supply by collecting from provincial ratepayers the cost the market did not). If that’s confusing there’s little need to worry because I’ll simply show you I can use this method -determining the average cost of supply multiplied by the amount exported - to very closely approximate what is shown as “the cost of producing exported power” in the Auditor’s graphic.
The components necessary to calculate the amount that exports paid (or received) are available through the IESO’s public reports. The calculations require a small amount of effort pulling together some data, but fortunately the IESO’s data directory publishes two reports in a format that makes the calculation relatively straightforward.If you understood all that you now know how the IESO calculated the revenues on exports for 2014 in Table 5 of that 2015 report from the Auditor. You can collect all the data for the 14 interties in both the export schedule and real-time market pricing reports (average the 12 5-minute intervals to get one hourly rate), build a table to translate the intertie names which differ in the IESO data feeds, and after linking up the tables with the translator table run queries to get your totals. Or you could trust me that this methodology not only reproduces the $636 million revenue number shown in Figure 5 of the 2015 OAGO report, it also matches the other annual figures provided by the IESO in response to a freedom-of-information request.
The total amount that exports paid for a given hour is a combination of the export MW and the zonal clearing price calculated for each intertie separately. The IESO’s Intertie Schedules and Flows Report provides hourly export schedules by intertie and provides access to annual data (2010-2016) under the Transmission tab in the Data Directory. The IESO’s Realtime Market Price Report provides hourly zonal clearing prices by intertie, which provides access to annual data (2010-2016) under the Price tab in the Data Directory. You can find these reports on our website here.
The value of exports at real-time prices (RTP) across interties from 2009-2014 is approximately $467 million less than the “Revenue from Exports” figure shown in Figure 10 of the 2015 AOGO’s report. We can’t replicate the method that produced the claim of $3.1 billion in losses of electricity over those 6 years as we can’t replicate the data the IESO provided as revenues - and there’s good evidence they won’t be able to either.
Late last January, when the IESO first posted its summary of 2019 data, it included, "exports contributed about $300 million towards meeting Ontario’s electricity system costs...The value of exports in 2019 will be updated when the data is available.” The data had already been available: it’s available the next day. The text remained at least until June, but was since updated to, “In 2019, exports contributed over $360 million towards meeting Ontario’s electricity system costs.” There doesn’t seem to be anybody at the IESO who can produce revenues from exports with their method used for one set of figures in the 2015 Auditor’s report, so if there was any justification for the other revenue numbers they provided in that report the organizational memory has long since forgotten which ass it was pulled from.
We now have a method for establishing the cost of procuring the supply exported, and a method for establishing the revenue, each of which matches figures provided in the past. With the methodology that can be established the losses from 2009-2014 are not the $3.1 billion reported in the 2015 Auditor’s report but $3.5 billion. In the following 6 years, from 2015-2020, losses were two and half times that at $8.8 billion.
The numbers themselves are, as I’ve mentioned before, debatable: there are many ways to estimate profit/loss on Ontario’s electricity exports, Debating numbers can be a useful tool for supporting ignorance: data is always imperfect, and assumptions are required for most calculations. The point of setting standards and methodology need not be achieving perfection but providing the discipline that trends become apparent over time. In 2020 the cost of producing electricity dumped on export markets was, by the methodology laid out here - intended to reproduce that of the Office of the Auditor General in their 2015 annual report - higher than it’s been going back as far as we could find data, while the revenue received on exports was lower than it has been.
“What you want to do of course is try to manage your system as best as you can so that there's as little extra electricity as possible” said Ontario Premier Dalton McGuinty in January 2011 - 10 years, 187 terawatt-hours and $11.6 billion in losses-in-dumped-exports ago. That measures the quality of the system's management.
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