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Portable tester for time response of merging unit

A technology of time characteristics and testers, which is applied in the direction of instruments, measuring electronics, measuring devices, etc., can solve the problems of test item inaccuracy and other problems, and achieve the effect of good real-time test, good real-time performance and strong adaptability

Inactive Publication Date: 2014-06-18
STATE GRID CORP OF CHINA +1
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Problems solved by technology

Therefore, there are often duplication of work or test project failures.

Method used

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  • Portable tester for time response of merging unit

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specific Embodiment approach

[0017] 800×600 gray screen LCD and keyboard input with 18 buttons are used as the human-machine interface, and one electrical Ethernet port is set as the interface for the instrument to communicate with the host computer and send test data.

[0018] The application software is developed based on the vxworks operating system. The good reliability and excellent real-time performance of vxworks are widely used in communication, military, aviation, aerospace and other fields with high-tech and high real-time requirements. The application software completes the analog data processing. Acquisition, digital reception, drawing the waveform on the time axis, after analysis and processing, the phase and frequency of the waveform are obtained, and then the delay time of the transformer under test is obtained. And according to the set time period, the maximum value, minimum value, and average value of the delay time are counted; the average value, maximum value, and minimum value of the m...

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Abstract

The invention relates to a portable tester for a time response of a merging unit. The tester comprises a microprocessor, a field programmable gate array, an optical fiber emitter, a FLASH peripheral chip and interface hardware, such as an LCD (Liquid Crystal Display), an Ethernet port and a keyboard. When the tester is used for testing the merging unit, a time tick message is sent by the optical fiber emitter through an optical fiber pulse per second or optical fiber IRIG-B code, at the moment, the output from the merging unit is received by the tester, and the rated delay, time jitter degree and synchronous punctuality of the merging unit are tested by the tester. A configured FT3 signal of a collector or PT merging unit is sent by the tester, the output from the merging unit is received by the tester, and the absolute delay and cascaded delay of the merging unit are tested by the tester. The portable tester for the time response of the merging unit has ultra-strong adaptation, is real-time and quick, is portable and is fit for the field test for the time response of the merging unit.

Description

[0001] technical field [0002] The invention relates to a portable merging unit time characteristic tester, which belongs to the technical field of smart grid detection instruments. Background technique [0003] At present, the development of smart substations and digital substations has entered the stage of large-scale engineering applications. With the extensive application of electronic transformers, traditional transformers + merging unit models, the merging unit will officially become smart equipment for smart substations and digital substations. With the release of State Grid Corporation of China Q / GDW 441-2010 "Technical Specifications for Relay Protection in Smart Substations", time-controlled merging units have also been widely used in smart substations. Among them, the delay characteristics of merging units and SMV messages The time jitter characteristics have been relatively clearly specified, and the synchronization signal has nothing to do with protection, so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 舒展周宁陈波苏永春
Owner STATE GRID CORP OF CHINA
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