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Brazil ponders spot power price alternative

  • Spanish Market: Electricity
  • 23/10/23

Brazil's electricity clearinghouse (CCEE) is partnering with power consultancy PSR to further study a price-per-offer model for the domestic spot power market, which would be a key development to consolidate power attribute pricing.

The lack of proper attribute pricing — which puts a value on power sources beyond just their electricity, such as being fueled by renewables or having the ability to start producing on a moment's notice — is one of Brazilian power generators' main complaints with the current system. But the development of technology-neutral power capacity, ancillary services and carbon markets is not possible with prices that do not reflect the real operating costs, such as the current model, according to power efficiency company Volt Robotics' managing director Donato Filho.

His concerns are echoed by other market participants, with more than 60pc of them saying that prices failing to represent the physical power generation and consumption costs is a "big problem," according to a poll taken last week at a CCEE and PSR event in Sao Pauloabout the new power model development project.

CCEE and PSR's project will continue until October 2025 and further the conclusions from a price-per-offer model study carried out last year, when PSR partnered up with Engie to explore how such a model would function. The current project will aim to bring proposals to improve Brazil's current price-per-cost model and contribute to the discussion of which one of the two models would most benefit the country.

Brazil's spot power price (PLD) is calculated using a computer model, which aims to reach the global cost of dispatching power at any given time. But it is heavily criticized for being unpredictable, leading to unrealistic electricity costs on the spot market and benefiting those who can foresee its uncertainties.

The PLD is calculated hourly for each of four Brazilian regions and prioritizes hydropower water storage levels and water flows in river data, while fuel costs and other sources' availability are less relevant. When rain levels are higher or water storage levels are full, the model neglects other variables, even if there is a chance they would bring the final price closer to market activity levels.

PSR is starting the studies with an understanding that a cost-based price offers more control and supervision to the market, limiting the role of validating parameters to the grid operator but also creating fragilities in risk aversion because of the stiffness of the model. On the other hand, the price-per-offer model is less restrictive, while also leaving the operation more exposed to concentrations of power in the market.


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