Abstract
PJM INTERConnection (PJM) was the first U.S. independent system operator/regional transmission organization (ISO/RTO) to demonstrate how battery energy storage resources provide frequency regulation services in a competitive market. Since its first pilot in 2009, PJM has integrated nearly 300 MW of advanced energy storage resources into its market. During this time period, ISO s/RTOs have developed rules to allow energy storage resources to participate in wholesale electricity markets. The Federal Energy Regulatory Commission (FERC) and state lawmakers have also taken steps to create an environment in which energy storage resources play an increasing role in the reliable operation of the power grid. This article outlines the storage technologies operating in PJM today and the wholesale products they provide to the market as well as discusses services that energy storage resources may provide in the future along with integration opportunities, resulting in a larger amount of storage deployed within the grid.
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