On-line monitoring system for use with electrical assets and method of operating the same

摘要

A system configured to monitor an operating electrical device includes a testing channel coupled to the device. The device is coupled to an electric power source through at least one electric power transmission channel. The power source is configured to transmit electric power at a first frequency. The testing channel is coupled to the power transmission channel. The system also includes a signal generator coupled to the testing channel. The signal generator is configured to inject testing signals into the testing channel at a second frequency that is greater than the first frequency. The system further includes at least one apparatus magnetically coupled to the power transmission channel. The magnetically coupled apparatus is configured to present a first impedance to the electric power at the first frequency and present a second impedance to the test signals at the second frequency. The second impedance is greater than the first impedance.

主权项

1. A system configured to monitor an operating electrical device that is coupled to an electric power source through at least one electric power transmission channel, the electric power source configured to transmit electric power at a first frequency and a first voltage, wherein the operating electrical device includes at least a portion to be tested, said system comprising:
a testing channel configured to be coupled to the portion of the operating electrical device to be tested and the at least one electric power transmission channel, said testing channel comprising at least one of a test signal injection portion and a test signal recovery portion; a signal generator coupled to said testing channel, said signal generator configured to inject testing signals into said testing channel at a second frequency that is greater than the first frequency, said signal generator coupled to said testing channel through said at least one of said test signal injection portion and said test signal recovery portion; and at least one apparatus magnetically coupled to the at least one electric power transmission channel, wherein said at least one magnetically coupled apparatus is configured to induce a first impedance to the electric power at the first frequency and induce a second impedance to the test signals at the second frequency, wherein the second impedance is greater than the first impedance.