Voltage transformer secondary voltage detection device and detection method

Abstract

The invention discloses a voltage transformer secondary voltage detection device and detection method. A main controller is electrically connected with an input switching module, the input switching module is electrically connected with a voltage division module, the voltage division module is electrically connected with a full-wave rectification module, the full-wave rectification module is electrically connected with an analog-to-digital conversion module, and the analog-to-digital conversion module is electrically connected with the main controller; the main controller controls the input switching module to acquire the input voltage of each phase line; the voltage division module carries out voltage reduction processing on the phase line input voltage; the full-wave rectification moduleconverts the phase line input voltage into a direct-current voltage; the analog-to-digital conversion module converts the direct-current voltage into a digital signal; and the main controller determines that the secondary voltage of the voltage transformer is abnormal when the digital signal is greater than a set threshold. According to the technical scheme provided by the invention, automatic detection of the secondary voltage of the voltage transformer can be realized, and the detection accuracy and efficiency are improved.

Description

technical field [0001] The invention relates to the technical field of automatic measurement, in particular to a secondary voltage detection device and a detection method of a voltage transformer. Background technique [0002] When the secondary voltage of the voltage transformer on the substation is abnormal, it indicates that there is an abnormal fault in the voltage transformer or transformer. If it cannot be found and dealt with in time, it may affect the normal operation of the voltage transformer or even the normal operation of the entire power grid. Therefore, It is necessary for the substation watchman to measure the secondary voltage of the substation voltage transformer regularly and judge whether the data is normal. In the process of on-site measurement, there may be the following problems: (1) wrong wiring leads to abnormal measurement data; (2) measurement gear and range selection errors of measurement tools lead to abnormal measurement data; (3) data analysis i...

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Problems solved by technology

[0002] When the secondary voltage of the voltage transformer on the substation is abnormal, it indicates that there is an abnormal fault in the voltage transformer or transformer. If it cannot be found and dealt with in time, it may affect the normal operation of the voltage transformer or even the normal operation of the entire power grid. Therefore, Substation watchmen are required to regularly measure the secondary voltage of the substation voltage transformer and judge whether the data is normal

In the process of on-site measurement, there may be the following problems: (1) wrong wiring leads to abnormal measurement data; (2) measurement gear and range selection errors of measurement tools lead to abnormal measurement data; (3) data analysis is not in-depth or human error is recorded Resulting in the failure to detect equipment abnormalities in time; (4) short-circuit risk of voltage transformers caused by wrong selection of gears and ranges for testing instruments and meters; (5) personal risk of low-voltage electric shock

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