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

A technology of corona current and acquisition card, which is applied in the field of power system, can solve the problems of stable acquisition and reliable transmission of corona current, data accuracy, uneven sampling rate storage depth, and unreliable practical application, etc., to achieve fast and real-time The effect of large-capacity timing storage, reliable high-speed transmission, and avoiding the risk of voltage breakdown

Active Publication Date: 2013-04-03
CHINA ELECTRIC POWER RES INST +2
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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.
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  • Corona current collecting card based on USB (universal serial bus) bus
  • Corona current collecting card based on USB (universal serial bus) bus
  • Corona current collecting card based on USB (universal serial bus) bus

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Embodiment Construction

[0038] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0039] The present invention is a UHV DC corona current data acquisition card based on USB transmission, and its system block diagram is as follows figure 1 As shown, it consists of a signal conditioning module, an A / D conversion module and a USB control module connected in series.

[0040] Such as figure 2 Shown is the signal conditioning module of the present invention, which is composed of a limiter protection circuit, a program-controlled amplifier circuit, an anti-aliasing filter circuit and an emitter follower circuit connected in sequence.

[0041] The limiting protection circuit includes a parallel transient suppression diode TVS and a ceramic discharge diode, which are used to limit the amplitude of the acquisition signal of the A / D conversion module and prevent the high voltage from breaking down the A / D modu...

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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...

Claims

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Application Information

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IPC IPC(8): G01R19/25
Inventor 刘元庆袁海文李炼炼陆家榆吕建勋郭剑
Owner CHINA ELECTRIC POWER RES INST
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