A nobel approach to improve the system power quality

Abstract

The Electrical power quality issue has attained considerable attention in last decade due to large penetration of power electronics based loads, microprocessor based controlled loads and integration of RE sources in to the grid. Power quality has become an important topic of discussion and research, especially in a deregulated environment. The term power quality (PQ) is generally applied to a wide variety of electromagnetic phenomena occurring within a power system network. Power quality can be defined as any problem manifested in voltage, current, or frequency deviation that results in failure or mal-operation of electric equipment. The electric power quality is also defined as a term that refers to maintaining the near sinusoidal waveform of power system bus voltages and currents at rated magnitude and frequency. Thus electric power quality is often used to express voltage quality, current quality, reliability of service, quality of power supply etc. The power quality disturbances decrease the efficiency of power system equipments such as generators and control equipments. Therefore the issue of power quality is important to both the consumers and the utility of electric power. The extensive research has been reported in literature on the consumer s aspects of PQ. There is need to investigated the effects of the PQ disturbances on the power system operation and customer equipments. There are many facets of power quality disturbances and each has its own source and mitigation techniques. The power system faults are important source of power quality disturbances. The PQ disturbances of high magnitude and short durations are propagated in the power network during faulty conditions.