System and method for generating a transmission line reliability rating

A system for determining a reliability line rating during a future time window for a transmission line comprising:

• a line monitor on a transmission line, the line monitor comprising a clearance sensor to determine a line clearance measurement, a line temperature sensor to determine a line temperature measurement, and a line current sensor to determine a line electrical load;
• and
• a reliability determination module disposed on a remote utility server, the reliability determination module configured to:
• in response to the line clearance measurement and the line temperature measurement generate a temperature-clearance model for the transmission line based on the received line clearance measurement and line temperature measurement;
• generate a plurality of past dynamic line ratings;
• receive forecasted environmental variables corresponding to a future interval;
• generate a plurality of past forecasted dynamic line ratings corresponding to the future interval;
• generate a plurality of error level values for the future interval based on the plurality of past forecasted dynamic line ratings and the plurality of past dynamic line ratings;
• generate a current forecasted dynamic line rating for the future interval;
• determine a scaling factor based on the plurality of error level values;
• and
• scale the current forecasted dynamic line rating in response to the scaling factor to obtain a reliability rating for the future interval.

A system for determining that a clearance obstruction has occurred in an environment of a transmission line, the system comprising:

• a line monitor on a transmission line comprising a clearance sensor to take line clearance measurements and a line temperature sensor to take line temperature measurements;
• and
• a reliability determination module disposed on a remote utility server, the reliability determination module configured to:
• generate a temperature-clearance model for the transmission line based on the received line clearance measurements and line temperature measurements;
• receive new line clearance measurements and line temperature measurements;
• update the temperature-clearance model based on the received new line clearance measurements and new line temperature measurements;
• monitor the temperature-clearance model for a change to the updated temperature-clearance model;
• and
• determine that a clearance obstruction has occurred in an environment of the transmission line based on the change to the updated temperature-clearance model.

A system for determining a reliability line rating for a transmission line during an interval, the system comprising:

• a processor;
• a memory, wherein the memory has stored therein instructions that, when executed by the processor, cause the processor to:
• in response to a line clearance measurement and a line temperature measurement received from a transmission line monitor coupled to a transmission line, generate a temperature-clearance model for the transmission line based on the received line clearance measurement and line temperature measurement;
• generate a plurality of past dynamic line ratings based on a maximum line temperature for the transmission line, wherein the maximum line temperature is determined by comparing a minimum acceptable clearance for the transmission line to the temperature-clearance model;
• determine a scaling factor based on the plurality of past dynamic line ratings;
• generate a dynamic line rating for an interval;
• and
• scale the dynamic line rating in response to the scaling factor to obtain a reliability line rating for the interval.