PJM streaming dynamic line rating data, thanks to innovative technology launched by PPL Electric Utilities

For the first time, dynamic line rating data began streaming to PJM Interconnection operators this month, thanks to a project by PPL Electric Utilities to install an innovative technology to three transmission lines in northeastern Pennsylvania.

PPL Electric Utilities has said it expects the activation of dynamic line rating (DLR) technology to expand capacity and promote market efficiency on three historically congested lines. PPL Electric Utilities believes the project can save customers about $23 million annually in congestion costs.

DLR technology installed on these three 230 kV lines coordinates information from evolving weather conditions to adjust the ratings that govern the lines’ capacity. For example, hot weather tends to increase the likelihood that a line will overheat, which has the potential to diminish the amount of current it can safely sustain. Also, colder weather and wind conditions have the potential to increase ratings on a line.

DLR ensures reliable operations to protect the DLR facilities and transmission system while reducing overall congestion and promoting market efficiency. PJM’s work to date suggests that transmission technology such as DLRs may lead to more accurate real-time ratings and reduce congestion overall.

For real-time information about the DLRs and the DLRs’ forecasts, go to the Ratings Information page at PJM.com.