How to Optimize Energy Storage in a Microgrid

June 27, 2017
In this paper, new voltage sensitivity indexes are proposed to search and evaluate the candidate buses in a microgrid, where the energy storage systems can be installed to contribute most effectively to the system.

In this paper, new voltage sensitivity indexes are proposed which can help you optimize energy storage in your microgrid. These indexes are derived from the inverse Jacobian matrix from the Newton-Raphson power flow analysis. After calculating and evaluating these indexes for the studied microgrid, four candidates‘ buses are selected. To verify that the selected buses are the best, the selected cases are simulated in PSCAD. The results from the proposed methodology and case studies have a consistent conclusion that the proposed voltage sensitivity indexes imply potential candidates for energy storage locations. Finally, by running a 24-hour time-sequence simulation of the complete system modeled in PSCAD, the best location is confirmed.

Microgrids are receiving much attention recently because of their ability to provide higher energy surety, quality, and security while also providing sustainability and energy efficiency. A microgrid is defined as a network of loads and local generations (distributed generations), as well as energy storage systems. Mainly, the presence of energy storage systems enables microgrids to regulate their voltage and frequency while the system operates in various modes, such as when a microgrid is islanded from the utility grid.

To learn more how to optimize energy storage in a microgrid download this white paper.