New regulation principles, liberalisation and increased attention to environmental and social factors are now strongly changing the world of EPI. In order to serve its existing members in the new scenario and to attract members from the new actors, CIGRE carried out a strong and wide transformation looking at the "Electrical System" as a whole, including the conversion of primary energy sources into electricity and the further transmission and distribution of electric energy to the end user. Dispersed Generation it is also included within the CIGRE's scope.

The subject was initially approached by a WG on the "Impact of increasing contribution of dispersed generation on the power system" who published the results on ELECTRA on Febr. 1999. The concept of DG is now continuously promoted by a number of factors deriving from some technological features the dispersed generators have and based on several expected benefits related with the improvement of efficiency and the reduction of network costs and environmental impact.

Not with standing DG is still less than 10% of installed generation capacity, due to the existence of barriers related with the high technology costs and the need to modify design and operation criteria of distribution networks.

Consequently a new SC is created on "Distribution Systems and Dispersed Generation" with the mission to facilitate and promote the progress and the exchange of knowledge in the field of system impact of distribution systems integrating DG, by synthesising state-of-the-art practices and developing recommendations.


To assess the technical impacts and requirements which a more widespread adoption of DG and which a larger proportion of undispatchable power generation could impose on the structure and operation of transmission and distribution systems. In parallel the SC also assesses the degree to which such solutions are likely to be adopted in the short, medium and long term and, consequently, the practical importance and timing of the technical impacts and requirements mentioned above. Rural electrification, demand side management methodologies and application of storage are within the scope of this SC.