ABSTRACT
Electric power quality has emerged as a major area of electric power engineering. The predominant
reason for this emergence is the increase in sensitivity of end-use equipment. This chapter is devoted to
various aspects of power quality as it impacts utility companies and their customers and includes
material on (1) grounding, (2) voltage sags, (3) harmonics, (4) voltage flicker, and (5) long-term
monitoring. While these five topics do not cover all aspects of power quality, they provide the reader
with a broad-based overview that should serve to increase overall understanding of problems related to
power quality.