On-line-monitoring intelligent current transformer

Abstract

The invention discloses an on-line-monitoring intelligent current transformer comprising a current transformer body, a case, a combined sensor, an end-screen terminal board, a terminal panel, a dielectric loss sensor, a protection device and a ground terminal. The case is arranged at the lower end of an oil tank of the current transformer body; and with the end-screen terminal board, communication connection between the combined sensor and the end screen is realized. On the basis of the integrated design, the combined sensor, the dielectric loss sensor, and the current transformer body, combined sensor and the dielectric loss sensor serve as one part of the current transformer to provide hardware conditions for partial discharging and dielectric loss testing of the operating current transformer in an electrified state, so that the partial discharging and dielectric loss can be detected conveniently during the electrified process. Therefore, the electrification testing of the current transformer becomes convenient, secure, and accurate without the need to interrupt the current transformer power, so that economic losses caused by the power failure are reduced.

Description

technical field [0001] The invention relates to the technical field of power equipment, in particular to an online monitoring intelligent current transformer. Background technique [0002] In order to realize the inspection and test of the running current transformer without power failure, the dielectric loss live test technology of the capacitive transformer equipment based on the same-phase comparison method and the live partial discharge detection technology of the high-frequency method transformer have completed the simulation test and calibration. After the test work, it began to be promoted in the power grid pilot, and achieved certain results, but it failed to be widely promoted. The reason is that the above-mentioned equipment needs to be connected to a dielectric loss tester, a partial discharge detector or an ultra-high frequency partial discharge detector when the live test is performed. Detection equipment, the installation of the above detection equipment requir...

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