Spinning and Non-Spinning Reserves Provide Grid Stability
CSP also provides essential grid stabilization features due to the use of a conventional, spinning turbine that adds inertia to the grid. Utilities and independent system operators (ISOs) are charged with meeting customer energy demands, and when there are rapid swings in energy needs, utilities need to ensure the grid remains stable.
For these needs, utilities and ISOs manage frequency and voltage regulation, short-circuit power, and spinning reserves, which is energy that’s already online and synchronized to the grid’s frequency. This makes it easier to maintain system frequency and quickly dispatch more energy. CSP can be a source of spinning reserves for immediate needs and non-spinning reserves for near-term needs, giving grid operators greater flexibility and control for ensuring reliability.
Putting a More Accurate Price Tag on Reliability Benefits
One of the biggest advantages of CSP is its reliability as an energy source and predictable costs. Unlike conventional fuels, there’s nothing to mine, ship, burn, or store as waste; there’s an abundant, unending supply of sunshine. Because the “fuel” is free, costs are predictable over the lifetime of a plant operation and its maintenance costs. In addition, more than 60% of the cost to operate a CSP power plant happens in the first year, enabling investors to have a better long-term understanding of costs and the return on their investment.