The National Renewable Energy Lab has a great paper titled Flexibility in 21st Century Power Systems. The paper addresses three grid requirements to accommodate increasing numbers of variable generation resources like wind and solar energy.
- The first among those requirements is flexible generation. We need power plants that can run efficiently with a very low output level and ramp rapidly from those deep turn-down rates.
- We also need flexible transmission to carry power without bottlenecks and facilitate access to a broad range of balancing resources. That’s requirement number two.
- And, finally, the NREL authors say requirement number three is flexible demand-side resources. Those resources include storage, responsive distributed generation and loads engaged in demand response programs that can support the grid by responding to market signals or direct load control.
Amen to requirement number three.