Dispatchable power

Definition

Dispatchable power refers to electricity generation that can be turned on or off, or adjusted in output, according to demand. This capability is essential in maintaining a reliable energy supply, especially as renewable energy sources like solar and wind are variable and dependent on environmental conditions. Having dispatchable power means that energy systems can better integrate with these renewables and meet fluctuating energy needs throughout the day.

5 Must Know Facts For Your Next Test

1. Dispatchable power sources include natural gas plants, hydroelectric facilities, and biomass energy systems that can ramp up or down based on electricity demand.
2. This flexibility is crucial for grid stability, especially as the share of intermittent renewable energy grows.
3. Energy storage systems, like batteries, can also provide dispatchable power by storing excess energy and releasing it when needed.
4. The ability to dispatch power enhances the integration of renewable sources by compensating for their variability.
5. Utilities often rely on a mix of dispatchable and non-dispatchable sources to ensure a reliable energy supply that meets peak demand.

Review Questions

• How does dispatchable power contribute to the stability of an electricity grid?
  • Dispatchable power enhances the stability of an electricity grid by allowing operators to respond quickly to changes in electricity demand. When demand increases, dispatchable sources can be activated or ramped up to provide additional power. Conversely, during low demand periods, these sources can be reduced or turned off. This responsiveness helps maintain balance in the grid and prevents blackouts or overloading.
• In what ways does the integration of renewable energy sources affect the need for dispatchable power?
  • The integration of renewable energy sources like solar and wind increases the need for dispatchable power due to their intermittent nature. Since these sources generate electricity only when conditions are favorable, having reliable dispatchable resources is essential to fill gaps when renewable generation is low. This ensures that there is always enough electricity available to meet consumer demand, which is critical for maintaining grid reliability.
• Evaluate the role of energy storage in enhancing dispatchable power capabilities within modern energy systems.
  • Energy storage plays a crucial role in enhancing dispatchable power capabilities by providing a mechanism to store surplus energy generated from renewables during peak production times. When demand spikes or renewable generation drops, stored energy can be released back into the grid, effectively acting as a dispatchable resource. This technology not only smooths out fluctuations but also supports a higher penetration of renewables by ensuring a steady supply of electricity when it is most needed.

Related terms

baseload power: Energy generated by power plants that can produce a constant output of electricity to meet minimum demand levels at all times.

intermittent power: Electricity generated from sources that do not produce a constant output, such as solar and wind energy, which vary based on weather conditions.

energy storage: Technologies and systems used to store energy for later use, which can help provide dispatchable power by balancing supply and demand.