Battery energy storage systems for electric utility, industrial and commercial applications

Voltage depressions and power interruptions are rapidly becoming two of the hottest topics in the field of power quality. Of particular interest is the need to supply a dependable, efficient and controllable source of real and reactive power, which is available instantly to support a large (>0.5 MVA) load, even if the utility connection is lost. This paper describes a versatile solution to this problem for utility, industrial and commercial applications using battery energy storage systems (BESS). BESS have the potential to provide other substantial benefits in terms of improved voltage and energy management in conjunction with this protection from interruptions.