Abstract
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. Techniques are discussed which have proved useful in conducting power quality investigations. Case study examples illustrate how these techniques have been put into practice by utility power quality groups. The first example is concerned with sodium lamp problems amd the second with variable speed drive nuisance tripping.< <ETX xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">></ETX>
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