Here's a breakdown:
Dispatchable resources are those that can be turned on and off or have their output adjusted quickly in response to changes in demand. Examples include:
* Power plants: Coal, natural gas, nuclear, and hydroelectric plants can be ramped up or down to meet changes in electricity demand.
* Battery storage: Batteries can be charged and discharged to match fluctuations in electricity demand.
Non-dispatchable resources are those that cannot be easily adjusted to meet changes in demand. They typically have fixed output levels or are subject to factors beyond human control. Examples include:
* Solar and wind power: Their output depends on the availability of sunlight or wind, which is unpredictable and varies significantly.
* Geothermal energy: While geothermal power plants can be controlled, their output is often limited by the natural heat flow from the Earth.
* Tidal energy: The generation of electricity depends on the tides, which occur at predictable times but cannot be adjusted on demand.
Implications of being non-dispatchable:
* Reliability challenges: Non-dispatchable resources can cause reliability issues if demand exceeds their output.
* Need for backup: They often require backup from dispatchable sources to ensure a consistent supply of energy.
* Integration complexity: Integrating large amounts of non-dispatchable renewable energy into the grid requires advanced technologies and strategies.
In summary:
"Non-dispatchable" describes energy sources that cannot be easily controlled or adjusted to meet changes in demand. This characteristic presents challenges for integrating them into the energy grid, but also highlights their potential to contribute to a more sustainable energy future.