Substation batteries play a vital role in overall reliability of a substation by providing dc power for protection, supervision and control of substation and line equipment. Frequently, transmission or distribution power will be lost or reduced in magnitude during system disturbances (faults) at precisely the same point in time that power is required to isolate the disturbance from the system. Power to control and supervise system components is necessary during any large-scale or system-wide ...

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