Feeder dynamic rating application for active distribution network using synchrophasors

Dynamic line rating (DLR) has found acceptance and increasing application in transmission network as a means to utilize the maximum capability of existing transmission lines. With the increasing number of generation sources at lower voltage levels, DLR may be of value for aerial MV feeders for similar purposes and to gain insight on the operation of generation sources at lower voltage levels. Static line ratings are based on a conservative estimate, which means that on most occasions, the actual capacity of lines is higher than the static line ratings. In order to exploit DLR in lower voltage levels, this paper introduces a method developed to exploit different data sources, including real time weather conditions, conductor sag and the actual line loading of the conductor to provide dynamic line ratings for active distribution networks. The method has been implemented in a software application in the LabVIEW environment and provides a user friendly front panel where real-time ampacity can be seen compared to the actual line loading. The developed application has been assessed through a hardware-in-the-loop (HIL) simulation setup. In addition, dynamic line rating results from the application have been appraised against those of proprietary solutions available in the market.