Energy markets

Overview

On April 1, 2026, Platte River joined the Southwest Power Pool Regional Transmission Organization (SPP RTO).

Energy markets help match electricity supply with demand, plan for future needs and make sure power is delivered reliably and at the lowest reasonable cost. 

A Regional Transmission Organization (RTO) is one type of energy market that brings utilities together to manage the electric grid across a large area, often covering multiple states. They help balance electricity in real time and plan transmission lines so power can move where it is needed. Joining an RTO is an important step in Platte River’s progress toward a noncarbon energy future. 

Being an active participant in an energy market helps us: 

  • Integrate renewables
  • Maintain reliability
  • Manage costs 

Platte River’s history in energy markets

Platte River’s journey to joining a full regional market began even
before the board passed the Resource Diversification Policy in 2018.

What joining the SPP RTO means for Platte River’s owner communities ​

Joining the SPP RTO helps advance Platte River’s progress toward a noncarbon energy future by enabling:

  1. Access to more renewable energy: Wind and solar energy vary throughout the day and in different regions. When Platte River has more renewable energy than we need, we can sell it to other utilities who are short on energy. When renewables are abundant elsewhere in the region, we can buy energy at low cost and minimize use of dispatchable resources.
  2. More flexibility and shared reserves: A large regional market gives utilities access to more resources during periods of high energy demand or extreme weather events. Sharing resources supports reliability while reducing the need for Platte River to build additional resources only for extreme events.
  3. Least-cost dispatch: As part of the SPP RTO, the market solves for the lowest cost, best fit solution to serve customers.
  4. Regional transmission planning and shared upgrade costs: Sharing costs across all market participants helps to economically integrate new renewable resources across the region. 
Aerial shot of solar field
Back view of a man sitting at a desk looking at monitors

Understanding RTOs: how they support reliability

RTOs help operate the electric grid across many states. RTOs plan days in advance and monitor electricity use in real time, schedule which power plants and renewable resources should run and make sure there is enough energy available to meet customer demand. This coordination helps prevent outages and keeps energy costs more stable.

Put simply, RTOs help utilities work together more efficiently, improving reliability and lowering costs for customers.

What an RTO does:

  • Balances supply and demand of electricity across multiple states
  • Schedules resources to run in the lowest-cost, most efficient way
  • Manages transmission and real-time power flows
  • Operates a competitive wholesale energy market
  • Coordinates emergencies and extreme weather responses

By joining the SPP RTO, Platte River gains access to these regional tools – supporting our three foundational pillars of environmental responsibility, financial sustainability and reliability.

Founded in 1941, SPP is a nonprofit supported by member utilities and organizations with a mission to deliver economic energy markets and reliable grid operations.

Deeper dive into energy markets

Platte River’s participation in the SPP RTO opens the door to a more dynamic, transparent and regionally coordinated energy marketplace. By joining a larger footprint, Platte River can access a wider pool of resources, improve renewable integration and strengthen reliability during periods of high demand or variable generation.

To learn more about how the SPP RTO functions and the benefits it provides, explore the SPP Wavelength interactive story map and review the Value of SPP overview.

Transmission line

FAQs

  • The Southwest Power Pool (SPP) is a nonprofit regional transmission organization (RTO) that helps utilities across many states share electricity, coordinate reliability and operate wholesale energy markets.   
  • Platte River joined the SPP RTO to gain access to day‑ahead and real‑time markets, shared regional resources and coordinated transmission planning – all of which support our decarbonization goal.  
  • SPP coordinates hundreds of generating units across multiple states.

  • This shared visibility and coordination can help utilities optimize their generation and transmission assets, and also manage extreme weather events and reduce service interruptions when grid conditions get tighter.

  • Optimizing all market participants’ collective assets makes the system as a whole more efficient, agile and resilient, and that helps protect reliability and reduce costs.  
  • Exceptionally high temperatures over several consecutive days resulted in new peak record loads for Platte River and other utilities, as well as tight supplies across the SPP RTO footprint.   
  • To avoid service interruptions, SPP issued an energy emergency alert directing member utilities, including Platte River, to issue public calls for conservation.   
  • The advisories issued by SPP during these times worked as designed; there were no service interruptions within our owner communities or the broader region.   
  • Markets allow more renewable energy to be used whenever and wherever it is available.

  • When Platte River has more wind or solar than we need, we can sell the extra energy in the market.

  • When renewables are abundant elsewhere, we can buy other utilities’ extra energy at a low cost.

  • Being able to shift excess renewable resource output across a larger footprint allows the regional 
    grid to accommodate more renewable energy.
  • Markets dispatch the lowest-cost energy first, allowing Platte River to buy energy when it is cheaper than generating it ourselves and to sell energy when it is valuable to the region.   
  • While market conditions vary, participating in an RTO provides more tools to manage costs and help improve long-term affordability.  
  • Market participation supports cost stability, reliability and renewable energy integration and helps make the most efficient use of all participants’ grid assets.   
  • While customer bills reflect many factors (fuel costs, weather, resource additions, transmission, etc.), the RTO gives Platte River more tools to manage these variables.   
  • During periods of high demand – like hot summer afternoons or prolonged subzero temperatures – customers may be asked to conserve energy.   
  • Small, temporary energy use reductions during tight conditions help keep the grid as a whole more stable, so we avoid service interruptions across the region and keep power flowing to all.  
  • No. Platte River continues to make decisions about our generation portfolio, resource planning, rates and operations.   
  • Market rules ensure fair access to the transmission grid, but local policy decisions an long‑term planning remain under Platte River’s authority.  
  • Yes. Markets supplement Platte River’s resources, but don’t replace them.   
  • Participating in an RTO does not eliminate the need for utilities to maintain their own resource adequacy.   
  • SPP requires each participant to show they have enough firm capacity to meet peak demand plus a planning reserve margin.   
  • These units will be offered into the market and will run when they are the most economic or when needed for capacity and reliability.   
  • As more renewables come online in the region, thermal units may operate less often, but they continue to play an important role in maintaining reliability.  
Accessibility notice:
Per the Americans with Disabilities Act (ADA), Platte River Power Authority will provide reasonable accommodation to qualified individuals with a disability who need assistance. Please email us at [email protected] or call 970-226-4000. “Walk-in” requests for auxiliary aids and services may be honored to the extent possible but can be unavailable if advance notice is not provided.

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