Testing apparatus and method for fixed series compensation protection

A technology of fixed series compensation and testing equipment, which is applied in the direction of measuring equipment, measuring electricity, and measuring electrical variables, etc., can solve the problems that cannot be fully and detailedly checked, and achieve the effects of convenient quantitative checking, shortening debugging time, and great versatility

Inactive Publication Date: 2016-01-13
NR ELECTRIC CO LTD
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

[0008] The purpose of the present invention is to provide a fixed series compensation protection test device and test method for the deficiencies of the prior art. The fixed series compensation protection test device and test method provide an improved IEC60044 based on-site verification of the series compensation protection function. The test device and test method of the -8 communication protocol solve the problem that the series compensation protection cannot be fully and detailedly checked on site

Method used

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  • Testing apparatus and method for fixed series compensation protection
  • Testing apparatus and method for fixed series compensation protection

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Embodiment 1

[0034] see figure 2 , the testing device for the fixed series compensation protection includes a current transformer, a low-pass filter module, an analog-to-digital conversion module, a signal processing module, a field programmable gate array chip and a photoelectric conversion module; the current transformer is used to convert the current analog quantity into Small voltage signal; the low-pass filter module is used to filter the small voltage signal; the analog-to-digital conversion module is used to sample and hold the analog input of the low-pass filter module, and send the obtained digital quantity to the signal processing module; The processing module is used to complete caching, data scaling, and communication protocol conversion; and the data is packaged and written into the field programmable gate array chip; the field programmable gate array chip is used to drive the photoelectric conversion module to convert the data into a format that supports the preset communicat...

Embodiment 2

[0037] see figure 1 , the test method of the fixed series compensation protection is realized by the test device of the fixed series compensation protection described in strength 1, which is suitable for the series compensation substation to carry out protection function handover tests or serial compensation system regular inspection tests for the series compensation protection. The analog current is converted into a small voltage signal by the current transformer TA, filtered by the low-pass filter LFP, and then the analog quantity is sampled and held by the analog-to-digital conversion chip A / D, and the obtained digital quantity is sent to the direct-reading memory After buffering, it enters the digital signal processing chip DSP for processing. The DSP chip processes the data through the parameters obtained from the man-machine interface module to complete the process of data scaling and communication protocol conversion, and packs the data into the site according to the pre...

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Abstract

The invention discloses a testing apparatus for fixed series compensation protection. A current transformer is used for converting a current analog quantity into a small voltage signal. A low-pass filtering module is use for filtering the small voltage signal. An analog-digital conversion module is used for sampling and maintaining an analog quantity input by the low-pass filtering module, and sending an obtained digital quantity to a signal processing module. The signal processing module is used for conducting caching, data zooming and communication protocol transformation, and enables data to be packed and written in a field programmable gate array chip. The field programmable gate array chip is used for driving a photoelectric conversion module to convert the data into an optical signal that supports a preset communication protocol, and sends the optical signal to a to-be-tested protection apparatus through a fiber interface. The invention also discloses a testing method for fixed series compensation protection. According to the invention, the protection function of a series compensation protection apparatus can be checked in a quantified manner, and the testing apparatus and method are suitable for debugging an intelligent transformer substation.

Description

technical field [0001] The present invention relates to flexible AC transmission FACTS (FlexibleACTransmissionSystem), which is suitable for the occasions where the input quantities in a high-voltage series compensation system are digital quantities and it is inconvenient to test and verify the protection function, and particularly relates to a test device and method for fixed series compensation protection. Background technique [0002] In the power system, in order to improve the transmission capacity of the system, the technology of connecting capacitor banks in series in the line, changing the line parameters and reducing the line impedance is adopted. Due to the large scale of the series capacitor bank and its location on the high-voltage insulation platform, it is required that all currents used for series compensation protection be transmitted from the high-voltage insulation platform to the protection chamber using optical fibers to transmit the digitized currents to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00
Inventor 王德昌周启文朱继红
Owner NR ELECTRIC CO LTD
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