The use of energy storage technologies for assisting with issues associated with self-scheduling renewable energy generation is being utilized or considered by a number of electric utilities primarily to smooth out fluctuations in the generation output of the plant or in the nearby electric system. Examples include battery storage, compressed-air storage, flywheel storage, and pumped water storage. It may also be feasible to use energy storage technologies to solve other transmission problems that may either be caused by or exacerbated by the incorporation of renewable energy sources – either utility-scale or distributed energy resources (DER). Examples of these transmission needs could be congestion through a flowgate, reverse power flow through a transformer, voltage regulation, etc. Traditional power system devices are often utilized to address such needs. This project will investigate the feasibility of utilizing a technology primarily installed to provide energy storage to address other transmission needs.
The objectives of this project are as follows:
- Identify and describe examples where an Energy Storage Technology also has application to solve a transmission need
- Identify and describe any modifications to an Energy Storage Technology that would enable it to address a transmission need
- Examine the feasibility of these applications or others and report on technical issues associated with the use of energy storage technologies for such purposes.
Users of this report may realize overall cost savings by utilizing an existing or proposed energy storage technology to meet a transmission need in lieu of another device to solve a transmission need.