Front-end data acquisition and caching circuit, system and method for partial discharge based on clock synchronization
A technology of data acquisition and clock synchronization, which is applied in the general control system, control/regulation system, measurement circuit, etc., can solve the problems affecting the accuracy of clock synchronization, lack of solutions, and affecting the judgment of partial discharge discharge, etc., so as to ensure stability , Guarantee effective and reliable results
Pending Publication Date: 2018-07-20
康威通信技术股份有限公司
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Problems solved by technology
[0003] The current partial discharge acquisition terminal does not add clock synchronization function. In the existing system, the front-end processing mechanism and data buffer method especially affect the accuracy of clock synchronization, which in turn affects the judgment of partial discharge discharge
[0004] Therefore, there are deficiencies in the front-end data collection and cache data processing of partial discharges, and there is still a lack of corresponding solutions
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[0036] It should be pointed out that the following detailed description is exemplary and intended to provide further explanation to the present application. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
[0037] It should be noted that the terminology used here is only for describing specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and / or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and / or combinations thereof.
[0038] As introduced in the background technology, there are deficiencies in local signal acquisition and buffer...
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The invention discloses a front-end data acquisition and caching circuit, system and method for partial discharge based on clock synchronization. The front-end data acquisition and caching circuit comprises AD sampling circuits, wherein the AD sampling circuits are connected with a clock circuit, clock synchronization of the AD sampling circuits is realized through the clock circuit, the AD sampling circuits are connected to a main control circuit, and the main control circuit is connected with memories; and the main control circuit comprises a control module, the connection / disconnection between a first-in first-out caching module and a memory control module is controlled through a switch, the control module further communicates with a clock synchronization module, and the main control circuit performs synchronization with a nanosecond clock synchronization system through a clock synchronization interface. Synchronization is performed on a local partial discharge acquisition terminaland a clock synchronization system terminal at different clocks. In addition, clock synchronization is performed on four channels at the same clock in the local partial discharge acquisition terminal,so that the validity and reliability of the acquired data are guaranteed, and characteristics of partial discharge signals can be comprehensively recorded, thereby ensuring the stability of power supply and the security of electric power equipment.
Description
technical field [0001] The invention relates to the technical field of data acquisition mechanism and data cache, in particular to a front-end data acquisition and cache circuit, system and method based on clock synchronous partial discharge. Background technique [0002] The partial discharge of high-voltage cable lines is closely related to the insulation status of power cables, and the change of partial discharge indicates that there must be defects in the cable insulation that may endanger the safe operation of the cable. Therefore, accurate measurement of partial discharge is the most intuitive, ideal and effective method to judge the insulation quality of high-voltage cables. It is of great practical significance to carry out on-line monitoring of partial discharge on the cross-linked cable lines in operation, and then analyze and diagnose the insulation defects of cables and accessories in the operating lines. [0003] The current partial discharge acquisition termin...
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IPC IPC(8): G01R31/12G05B19/042
CPCG01R31/1272G05B19/0428G05B2219/2612
Inventor 郑元勋马宝国杨震威
Owner 康威通信技术股份有限公司