Rapid voltage change (RVC) is one of the voltage disturbances classified under the term voltage quality and is included in several standards internationally but without a fully unique definition. This paper describes the Norwegian regulator's motive for introducing requirements for RVCs in the public electricity quality of supply regulation. Furthermore, a research project is described with focus on which rapid voltage changes that are visible in lighting. This project gave a sound basis for providing a unique definition on RVCs, and the definition is also presented. Finally, the paper describes the regulator minimum requirements for RVCs.

This paper describes the extended incentive based regulation on continuity of supply adopted in Norway as of 2009. The new interruption cost assessment methodology is described incorporating short interruptions and time dependency of interruption costs. Previous studies have shown that annual costs of short interruptions are in the same order as costs of long interruptions, and that the costs are highly time dependent on a weekly and daily basis. Technical and economic consequences of the extended regulation for the network companies are also described.

CEER and EURELECTRIC cooperation in the field\ud of quality of electricity supply, involving joint meetings and the\ud participation at the relevant CENELEC Technical Committee,\ud contributed to the results attained in the recent publication of the\ud EN 50160:2010 edition that includes a new voltage dips\ud classification table allowing harmonisation at European level on\ud voltage dips data collection. The generalisation of voltage quality\ud monitoring data publication all over Europe will allow the\ud definition of responsibility sharing between the different involved\ud stakeholders and the evolution of voltage quality regulation\ud applied at national level. Examples from Sweden and Italy are\ud briefly presented in this paper

The CEER and EURELECTRIC cooperation in the\ud field of quality of electricity supply, involving joint meetings and\ud the participation at the relevant CENELEC Technical\ud Committee, contributed to the results attained in the recent\ud publication of the EN 50160:2010 edition that includes a new\ud voltage dips classification table allowing harmonisation at\ud European level on voltage dips data collection. The generalisation\ud of voltage quality monitoring data publication all over Europe\ud will allow the definition of responsibility sharing between the\ud different involved stakeholders and the evolution of voltage\ud quality regulation applied at national level. Examples from\ud Sweden and Italy are briefly presented in this paper

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