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Optical VFTO measurement system based on Pockels effect

A measurement system and optical technology, applied in measurement devices, measurement of electrical variables, measurement of current/voltage, etc., can solve the problems of low measurement bandwidth of capacitive sensor method, low measurement accuracy of casing end screen method, and easy to be affected by on-site environment. , to achieve the effect of eliminating partial discharge phenomenon and withstand voltage problems, superior electrical performance, and improving system stability

Inactive Publication Date: 2014-09-17
STATE GRID CORP OF CHINA +1
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AI Technical Summary

Problems solved by technology

At present, the methods for measuring VFTO mainly include capacitive sensor, electric field probe and bushing end screen method; however, the measurement bandwidth of the capacitive sensor method is low; the measurement point calibration of the electric field probe method is easily affected by the site environment; the measurement accuracy of the casing end screen method low and limited

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  • Optical VFTO measurement system based on Pockels effect
  • Optical VFTO measurement system based on Pockels effect
  • Optical VFTO measurement system based on Pockels effect

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Embodiment Construction

[0034] In order to better understand the present invention, the content of the present invention will be further described below in conjunction with the accompanying drawings.

[0035] The overall block diagram of the testing system that the present invention adopts is as figure 1 Shown: The test system mainly includes a Pockles effect optical sensor, a signal acquisition processor, and a host computer data processing system. The Pockles effect optical sensor uses its internal light source and optical components to convert the electric field signal in the GIS tank into a VFTO optical signal; and transmits it to the signal acquisition processor through the optical fiber, and the signal acquisition processor processes the received signal and transmits it to the host computer The data processing system and oscilloscope, the upper computer data processing system give full play to the advantages of upper computer data acquisition, analysis, processing and storage, extract VFTO peak...

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Abstract

The invention provides an optical VFTO measurement system based on the Pockels effect. The system comprises a VFTO optical sensor (4), a bus guide rod (3) and basin-type insulators (2) with the same center, wherein the VFTO optical sensor (4) is arranged on a cylindrical GIS tank (1) and the bus guide rod (3) is coaxially arranged in the GIS tank (1). The optical sensor (4) is connected with a signal collecting processor (8). The optical VFTO measurement system has the advantages that the measurement bandwidth is large, the anti-jamming capacity is high, and the insulation level is high, the optical VFTO measurement system can be used for measuring the VFTO generated by motion of a disconnecting switch in a GIS, the characteristic parameters of the VFTO are analyzed, and the propagation characteristic of the VFTO is studied.

Description

Technical field: [0001] The invention relates to a VFTO measurement system, in particular to a high-sensitivity optical VFTO measurement system based on the Pockels effect. Background technique: [0002] Gas insulated switchgear (GIS), which is widely used in the field of high-voltage transmission, has the advantages of small footprint, less maintenance workload, excellent insulation performance, and high reliability. During operation, the action speed of the isolating switch, grounding switch and circuit breaker in the GIS is low, and repeated breakdown of the contact gap will occur, resulting in a very fast transient with a high amplitude, a large steepness, and a frequency up to GHz. Very fast transient overvoltage (VFTO) can cause damage to GIS and transformer equipment in severe cases. At the same time, the ground potential rise caused by VFTO will cause damage to the secondary equipment of the substation. [0003] The phenomenon of VFTO is complex and random, and its...

Claims

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Application Information

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IPC IPC(8): G01R19/00G01R19/25
Inventor 邱进吴士普陈江波汪本进王玲毛安澜徐思恩费烨陈晓明冯宇李璿周翠娟朱丝丝黄琴
Owner STATE GRID CORP OF CHINA
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