Method and system for testing low-temperature accuracy of fiber optical current transformer

Abstract

The invention relates to a method and a system for testing low-temperature accuracy of a fiber optical current transformer. The method comprises steps: the fiber optical current transformer is placed in a temperature test box, and the temperature range of the temperature test box is set; during a fiber optical current transformer temperature changing process, a temperature sensor acquires temperature signals, the signals are transmitted to an information processing unit, the fiber optical current transformer acquires current signals, and the current signals are transmitted to a transformer calibration device; the transformer calibration device receives standard current signals generated by a standard current transformer, the acquired current signals are calibrated according to the standard current signals, and after error data for the acquired current signals are determined, the error data are transmitted to an information processing unit; the information processing unit analyzes the state of the fiber optical current transformer according to the received temperature signals and the error data, and the state is transmitted to an upper computer; and the upper computer receives information transmitted by the information processing unit, and the information is displayed and stored.

Description

technical field [0001] The invention relates to the field of electronic power, and more particularly, relates to a method and system for testing the low-temperature accuracy of an all-fiber current transformer. Background technique [0002] In recent years, due to the advancement of optical fiber and electronic technology, electronic transformers based on various sensing principles have developed rapidly. , put forward higher requirements on the performance of the electronic transformer with optical characteristics used in its substation. Since the operating environment of some UHV and smart grid substations in my country is a low temperature area, the average temperature has been below -20°C for a long time. The low temperature environment will cause certain troubles to the operation stability of the important equipment in the substation—electronic transformer. [0003] The traditional transformer uses the electromagnetic induction theorem to transmit voltage and current s...

AI Technical Summary

Problems solved by technology

The all-fiber optic current transformer is the highest level of optical current transformer development so far. It has been widely used in UHV DC projects and various intelligent substations. The all-fiber optic current transformer uses a large number of optical sensitive devices. The impact is very large, especially the instability of its accuracy

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