The activities organized by the Operation，Control and Protection Session（Session3）of CIRED 2013 are: oral and poster presentation of 230 papers，a round table discussion on new protection schemes for grids with decentralized generation，and two technical tutorials on protection of distribution networks and role of the distribution management system in modern distribution systems.The focuses of concern include distribution automation，fault location，DA/DMS，control and protection of distribution systems with distributed generations，and on line condition monitoring.In order to meet the requirement of integration of large amount of distributed electric sources，the distribution network is bound to take more and more measures to perform active control，dispatch，and management toward more intelligent operation.