Practices for solving end-user power quality problems

Techniques are discussed which have proven useful in conducting power quality investigations. The discussion focuses on a few characteristics of power line disturbances which have proven helpful in localizing the source of power quality problems. One of the primary tasks of utility personnel responsible for customer´s power quality concerns is to identify whether disturbances are generated within the customer´s facility or on the transmission and distribution system. Advances in both instrumentation and troubleshooting methodology have made it possible to make these determinations with greater accuracy and less investment of time. Case studies illustrate how these techniques have been put into successful practice by utility power quality groups