Solutions to the power quality problem

The problems of power quality are diverse both in nature and also in terms of the power systems that must be considered. From high-voltage transmission systems to domestic supply problems due to natural phenomena and interference from polluting loads call for a very wide range of solutions. These solutions are now becoming available with the development of new and larger solid-state switching devices. This paper discusses some of the devices available to combat power quality problems including: static VAr compensators; STATCOM (static compensators); system interconnection using DC link; UPFC for power flow control; active filters; dynamic voltage restorers for voltage sag mitigation; energy storage; and the premium power park.