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EDMONTON — Alberta‘s government says it is updating its electricity market rules in order to help lower consumers’ utility bills.

The new measures are aimed at the practice of “economic withholding,” a strategy regularly used by power generators in Alberta’s unique-to-Canada free-market electricity system.

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Under Alberta’s competitive market design, electricity suppliers submit offers into the energy market known as the power pool every hour. The Alberta Electric System Operator then dispatches the suppliers’ electricity, starting with the lowest-priced offers and moving higher until the province’s power needs for that hour are met.

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Economic withholding is when power producers deliberately hold back some of their supply, offering it at a higher price. It’s a gamble that can pay off if the operator needs that power, since the producer makes more money, but backfires if the province’s power needs are met before it gets to the higher-priced offer.

The practice is not illegal, but has been highly criticized recently as one of the factors contributing to soaring consumer power bills in the province, as well as a growing number of occurrences where power prices in the province have been higher during off-peak periods than during periods of peak demand.

“Our government is committed to Alberta’s unique and investor-driven energy-only market. However, the market’s rules were designed 25 years ago, and some are no longer optimal for the system today,” said Utilities Minister Nathan Neudorf in a news release.

“This will truly make a difference by helping lower Albertans’ utility bills.”

The new rules will limit the offer price of natural gas generating units owned by large providers, if net revenues cross a predefined threshold. They will also require natural gas generating assets to be made available, as directed by the AESO, in certain circumstances such as extreme weather and other times of peak demand.

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The government said the changes will still allow generators to earn revenue while ensuring Albertans have access to affordable and reliable power.

Neudorf announced the changes in a speech at the annual conference of the Independent Power Producers Society of Alberta in Banff on Monday.

The industry group, known as IPPSA, represents Alberta’s electricity generators. The group has not yet replied to a request for comment.

The changes announced Monday are just the start of what could be a series of significant changes to Alberta’s electricity market. The rules that govern the province’s current system were designed at a time when the bulk of Alberta’s power needs came from coal, and don’t necessarily work for a system that is now driven by natural gas and renewables.

In a particularly high-profile example, Alberta was forced to declare an emergency grid alert in January when the system — under pressure from a number of natural gas plant outages as well as wind that was not blowing — came close to buckling.

Alberta is also locked in a heated dispute with Ottawa over the federal government’s proposed Clean Electricity Regulations, which Alberta has said cannot be achieved by 2030 without jeopardizing the stability and affordability of the province’s power system.

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Under Premier Danielle Smith, the provincial government has a number of reviews underway looking at grid reliability, the future energy mix and electricity market design.

Jason Wang, senior electricity analyst with clean energy think-tank the Pembina Institute, said he had hoped Neudorf would use Monday’s IPPSA conference to provide more clarity about the province’s future direction than he did.

“Essentially what we know is there will be further changes to the market. But it needs to be timely and recognize the urgency of the energy transition and climate issues,” Wang said.

“If we get years of market uncertainty for developers without any indication of what the end result is going to look like, that could really slow down the net-zero transition.”

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