Power quality monitoring in the French distribution system Three applications for power quality / reliability data Regulatory To prove that regulatory or contractual commitments are fulfilled Technical To evaluate and follow the network’s performance Services To provide users with historical data and customise contracts

A new power quality monitoring policy adopted by EDF Distribution in 2002 Interruption data is collected with a system based on the distributor’s SCADA Measurements are performed At the delivery point of users who have subscribed a “customised” PQ contract Downstream of every HV/MV transformer In case of complaint Various measurement devices are used Fixed / mobile network analysers Meters with limited PQ functions All metering points will be equipped within 10 years

An information system to analyse and store PQ measured data