Grid Scale Energy Storage: Technologies and Forecasts Through 2015

Distributed Grid Scale Energy Storage

The development of the electrical grid is one of the most impressive accomplishments of the 20th century. Its scale and ubiquity speak volumes about how important it has become to modern life. The modern grid, however, is still largely based on the original design that Westinghouse and Edison debated in the late 1800s, and it is not designed for modern electrical loads, distributed energy sources or optimal efficiency. Smart grid technology is now beginning to be rolled out to improve the system. One of the major pieces required to make the new smart grid effective is a buffer in the system that can store energy to balance the whole grid system.

The development of distributed grid scale energy storage technology offers great potential to improve the architecture and operation of the electrical grid. A number of interrelated factors are driving the adoption of distributed grid scale energy storage including:

•Development of renewable and/or distributed energy sources. For instance, wind power requires approximately 3 MW to 5 MW of additional frequency regulation electric ancillary service for every 100 MW wind power installed and would also benefit from load shifting energy storage.

•Utilities’ desire for more efficient use of generation, transmission and distribution assets

•Public’s desire for carbon reduction and more efficient use of fuel resources

•Increasing power quality/reliability requirements from end users

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