Experiences from integrating distributed generation in Norway: results from a DSO survey 2010/2011

Overall challenges and recommendations concerning the integration of small scale hydro in MV distribution networks

“…Small-scale hydro power is already the dominant DG technology in Norway today, representing 92 % of the total number of DG units [2]. In 2010, there were over 900 small hydro power plants representing 73 % of the total number of Stockholm, 10-13 June 2013…”

“…they hold a concession to build and operate the network in a specific area and are obliged by law to offer non-discriminate access to all network usersboth end-users and producers. Although not all DSOs are affected by DG, a recent survey among those that are, shows that the main challenges with DG integration are voltage and stability problems and problems related to protection and control equipment [2]. Because most small scale hydro units are located in remote areas with a weak MV distribution grid, their integration will typically require a modification of the existing grid or construction of new grid infrastructure if the existing grid is unable to support the DG connection.…”