This paper shows how information from vulnerability analyses and existing maintenance management systems can be combined with information about threats and criticality to establish vulnerability indicators for power lines. The development of indicators to monitor the vulnerability regarding weather related threats is addressed and the methodology is demonstrated for twocase studies using data from two different network companies and selected critical power lines in their supply areas.

Due to the aging of network infrastructure, the increasing load demand in distribution networks together with the increased installation of PVs (Photovoltaic) in the MV and LV network, there is a need for network reinforcement. As load growth congests the grid, the strategic placement of electric storage systems can be an alternative to or contribute to a deferral of grid investments. To study this, an optimization problem solving the dual-purpose deployment of prosumers' level battery storage system has been formulated and will be presented in this paper. The MV/LV substation loadings are compared for the 0% prosumers and 100% prosumers scenarios with PV-battery system. The results of the analysis show that the absolute peak at secondary substation decreases by 8.74% and the average day peak drops by 17% while the total annual energy drawn from the grid reduced by 8.41% with the 100% prosumers scenario. Furthermore, by using household level battery systems for peak shaving of local loads one can achieve a deferral of overloading by 3 years at MV/LV substation.

This paper is about electric power system planning in Norwegian medium and low voltage distribution networks. The paper describes some of the challenges regarding electric power system planning today. The biggest challenge is the lack of control of the operating conditions in these grids. It is comparable to driving in the dark. With the introduction of ICT into the power system, the light will come on and new possibilities will occur. But the distribution system operators will also face new threats related to data security. The electric power system planning in the future will follow the same methodology as today, but many new factors must be taken into consideration.

No abstract

Integration of DG into MV distribution grids in Norway means integration of small hydro power units. Most of the DG potential in Norway is located in rural areas with weak MV grids and low consumption. This paper describes the situation in Norway regarding integration of DG into the MV grid. The paper also describes the challenges DSOs face regarding integration of DG and a particular case from Namsskogan is used as an example.