ON-LINE TIME DOMAIN REFLECTOMETER SYSTEM

摘要

A number of TDR systems and testing methods are provided that improve the quality and accuracy of information collected when propagating a signal along a length of cable in order to pinpoint specific anomalies. One or more of the TDR systems includes, for example, a computing device, a pulse generator, and at least one capacitive test sensor. The at least one capacitive test sensor transmits/receives pulses to/from a power system component, such as an insulated power cable, in a capacitive manner.

主权项

1. A method of testing a power system component for anomalies, comprising:
capacitively coupling one or more test sensors to an on-line insulated medium voltage power transmission cable; generating a test pulse via a pulse generator having an output impedance greater than 500 ohms; transmitting the test pulse to at least one test sensor of the one or more test sensors; capacitively transmitting the test pulse from the at least one test sensor of the one or more test sensors onto the medium voltage insulated power cable so that the test pulse travels along the medium voltage insulated power cable; and capacitively receiving a reflected pulse by one test sensor of the one or more test sensors from the medium voltage insulated power cable, the reflected pulse resulting from the test pulse interfacing with an anomaly along the medium voltage insulated power cable.