Corona current collecting card based on USB (universal serial bus) bus

Abstract

The invention provides a data collecting card based on USB bus. The data collecting card comprises a signal conditioning module, an A / D (Analog / Digital) conversion module, and a USB control module which are connected in order; the USB control module is communicated with the signal conditioning module; the corona current is converted into a voltage signal by a non-inductive resistance sensor to transmit to the signal conditioning module of the corona current collecting card to perform the amplitude limiting, amplifying, filtering and isolating, and then transmit to the A / D conversion module to perform the data sampling and conversion, the converted signal is transmitted to the USB control module to control and store, and the stored information is transmitted to a computer. Through the A / D conversion module and the USB control module, the parameter collecting and storage of the corona current signal can be controlled. The collecting device can realize the reliable collection, safe storage and high-speed transmission of the corona current signal under the ultra-high voltage complex electromagnetic environment.

Description

technical field [0001] The invention belongs to the field of power systems, and in particular relates to a corona current acquisition card based on a USB bus. Background technique [0002] With the improvement of the voltage level of China's transmission lines and the putting into operation of UHV DC transmission projects, the problem of corona loss in transmission lines has become increasingly prominent. The study of corona loss is of great significance to the economical and stable operation of transmission lines. [0003] At present, corona current measurement systems are mostly composed of off-the-shelf products. The data acquisition devices used are various, and the data accuracy, sampling rate, and storage depth are uneven, which cannot meet the needs of stable acquisition and reliable transmission of corona current. Some self-developed data acquisition devices are limited to simple experiments in ideal environments such as laboratories. Once they work in actual transm...

AI Technical Summary

Problems solved by technology

[0003] At present, the corona current measurement system is mostly composed of shelf products. The data acquisition devices used are various, and the data accuracy, sampling rate, and storage depth are uneven, which cannot meet the needs of stable acquisition and reliable transmission of corona current.

Some self-developed data acquisition devices are limited to simple experiments in ideal environments such as laboratories. Once they work in actual transmission lines, they are prone to equipment breakdown or large interference, resulting in inaccurate data. Carry out practical application in engineering

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