Increasing hosting capacity through dynamic line rating: risk aspects
2015 (English)Conference paper, Presentation (Refereed)
The availability of monitoring, control and communication technology makes it possible to estimate the ampacity of an overhead transmission line continuously. This allows the transport of substantially larger amounts of energy over that line that when a static ampacity value is used. It is shown in this paper that the use of such dynamic line rating allows more wind power to be connected to the grid, i.e. it results in an increase of the hosting capacity. For the numerical example presented in the paper, the hosting capacity is increase from 214 to 390 MW. There are different types of risk associated with the introduction of dynamic line rating, some of which are discussed in this paper. Two main types of risk are distinguished. Risks associated with possible overload of components, even when the ampacity is exactly known. Additional risks due to the difference between the actual and the estimated ampacity.The introduction of curtailment, in combination with dynamic line rating, makes it possible to manage the first type of risk. The risk of overload carried by all customers is replaced by the risk of temporality being disconnected for the wind-park owner. The latter is however also the stakeholder gaining most from the increase in hosting capacity.To reduce the second type of risk, several practical aspects need to be considered before implementing dynamic line rating, several of which are discussed in this paper.
Place, publisher, year, edition, pages
Research subject Electric Power Engineering
IdentifiersURN: urn:nbn:se:ltu:diva-32138Local ID: 6865d54a-d01f-492e-9f8c-086afeeb904dOAI: oai:DiVA.org:ltu-32138DiVA: diva2:1005372
CIGRE Symposium : 27/05/2015 - 28/05/2015
Upprättat; 2015; 20150817 (matbol)2016-09-302016-09-30