ABSTRACT
Power quality has assumed increasing importance in view of the widespread use of power electronic equipment. For reactive var compensation, in addition to shunt capacitors and reactors, static var compensators (SVC) are used. Harmonics can cause misoperaton of the protective equipments, contributing to a reduction in power quality. Harmonic filters are used to absorb undesirable harmonics. This chapter analyses issues of power quality, and later chapters deal with other topics such as SVCs, harmonics, filters and shunt capacitors, and reactors for reactive var compensation. It introduces the concept of power quality and its importance, and explain the common terms used in describing power quality. A power quality problem is any occurrence manifested in voltage, current, or frequency deviation that results in failure or misoperation of customer equipment. To develop compatibility levels and to deepen the understanding of system performance, data on power quality are being collected by various agencies from around the world.
