Trending functions for predicting the health of electric power assets

Abstract

A method for determining a dynamic rating for a conductive path includes using a sensor to measure a value for a load parameter and selecting a heating process associated with the load parameter. A rated temperature change is changed by removing temperature changes due to a heating process other than the selected heating process to produce an impaired rated temperature change. A thermal load percentage is determined from the impaired rated temperature change. The thermal load percentage and the measured value are then used to determine the dynamic rating for the load parameter. A method also includes measuring a temperature rise, a current, and a voltage on the conductive path multiple times. Using at least two basis functions and the multiple measured temperature rises, currents and voltages, the values for at least two variables are determined. Trends in each variable are determined to determine a condition of electric equipment.

Description

[0001] Cross References to Related Applications [0002] This application is based on and claims the benefit of U.S. Provisional Patent Application 62 / 581,635, filed November 3, 2017, based on and claims the benefit of U.S. Provisional Patent Application 62 / 619,603, filed January 9, 2018, and is also based on and Claiming the benefit of U.S. Patent Application 16 / 143,811, filed September 27, 2018, all three are hereby incorporated by reference in their entirety. technical field [0003] The present invention relates to a trend analysis function for predicting the health status of electric assets. Background technique [0004] A major cost of systems that generate, transmit and distribute electricity is the interruption of power to customers and the consequent loss of dependent business operations. A single power outage to a critical asset has cost hundreds of millions of dollars in lost revenue, in addition to equipment repair costs. [0005] To avoid such failures, system...

AI Technical Summary

Problems solved by technology

However, if an asset experiences some type of partial failure, the safe load rating for the asset may be lower than the nominal load rating

Also, setting fixed intervals for inspection and replacement is labor-intensive since many assets are in acceptable condition at the time of inspection / replacement and do not require replacement

Additionally, other assets can still fail between inspection / replacement intervals, resulting in power outages and consequent loss of revenue

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