Voltage quality and reliability from electrical energy-storage systems

Due to the increasing use of sensitive equipment for process control, the requirements for the voltage shape are growing. Voltage irregularities often cause the process control to fail, while the process at high performance is insensitive. Thus, the use of uninterruptible power systems (UPS) is indispensable. To improve voltage quality a new system is presented using the energy storage of a UPS for active compensation.