Search

Smart grid technologies which include meteorological sensors provide the possibility to maximize overhead line capacity with the use of dynamic ratings. The benefit of dynamic ratings is significant yet dependent on weather conditions. Given that it is increasingly certain that we are locked into a future where climate change will become significant, it is possible that the advantage of dynamic ratings will be compromised in the future. This paper investigates the impact of climate change on overhead lines operated using dynamic ratings in the UK power system. In the proposed approach, the future weather information of UK is generated from a range of climate models on the basis of a range of emission scenarios. It is then used as the input to an overhead line thermal model to predict overhead line dynamic ratings. The study examines an overhead line located in Slough and a reduction in average ratings of less than 5.52% at different probability levels is shown. This indicates that the dynamic rating will mitigate the impact of climate change in the future when compared against a static rating reduction of 14%. [ABSTRACT FROM PUBLISHER]

In the last few years, Reconstruction in electrical industry has led to optimal using of existing transmission lines capacity in order to reach to maximum economic efficiency. Improvements in communication technologies and sensors make possible real time calculation of transmission lines thermal capacity, which is called dynamic rating. On the other hand, in energy markets, system conditions and transmission capacities for future operations are the essential keys. Operators would like to know the amount of the system losses and also Available Transfer Capability (ATC) which effect on the market players' activities. Improvement in losses estimation and ATC calculation, considering dynamic transmission lines rating, instead of static rating, is discussed in this paper. Losses estimation is performed by using repetitive calculation of lines resistance based on weather conditions. It is shown that using of dynamic rating has a very important effect in ATC calculations. A program is developed for calculation of dynamic rating in MATLAB software, but system modeling and calculation is performed by DigSILENT package. Data transfer between two software is possible through a link which is created by using DigSILENT Programming Language (DPL). IEEE 6-bus and 30-bus test systems have been used and modified as test systems. [ABSTRACT FROM PUBLISHER]