Quality of supply survey 2008

This Technical Report is a product from the project A new concept for power quality and reliability measurement and management (short: the PQM project) – Work Package 1: Quality of Supply -  needs and options. To identify the present needs and priorities in Quality of Supply Management, a survey has been conducted among Norwegian utilities. The survey was implemented as a web based survey and covered all quality of supply phenomena defined in EN 50160. In addition some EMC issues also were included. The survey received 36 responses from DSOs and 2 responses from the Norwegian TSO. The most important quality of supply phenomena as sources for problems for the DSOs is given by the following ranking:1. Supply voltage variations 2. Short duration supply interruptions 3. Voltage dips 4. Long duration supply interruptions 5. Rapid voltage changes/flicker 6. Transient overvoltages 7. Temporary overvoltages The phenomena written in bold are the ones also prioritized by the TSO. The most important need for quality of supply improvement according to the DSOs is to get advice concerning measurements and measurement equipment. The TSO sees basic technology transfer, national databases, advice concerning measurements/measurement equipment and standardisation as important issues in general, but the needs are different for different phenomena.