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GIS basin-type insulator distributed capacitor-based bus voltage measurement device

A basin-type insulator and distributed capacitance technology, applied in the field of power systems, can solve the problems of high cost of voltage transformers, power outages during installation and maintenance, and susceptibility to external influences, so as to improve measurement accuracy and reliability, strong applicability, and safety The effect of strong reliability

Active Publication Date: 2018-04-13
STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a busbar voltage measuring device based on the distributed capacitance of GIS pot insulators to solve the technical problems of poor anti-interference, susceptibility to external influence, and large measurement error existing in existing GIS voltage monitoring devices. It can flexibly, conveniently, safely and accurately obtain the voltage waveform of the high-voltage transmission line during operation, and then monitor the operation status of the high-voltage transmission line in real time, which can overcome the high cost of existing voltage transformers, the need for power outages for installation and maintenance, inflexible measurement, insulation Requires advanced defects

Method used

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  • GIS basin-type insulator distributed capacitor-based bus voltage measurement device
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Embodiment

[0027] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0028] like figure 1 As shown, the bus voltage measurement device based on the distributed capacitance of GIS pot insulators provided in this embodiment includes a voltage divider 1 , a coaxial cable 16 , and an operational amplifier circuit 17 . The coaxial cable 16 is divided into two sections, the first section is connected between the voltage divider 1 and the operational amplifier circuit 17, and the second section is connected between the operational amplifier circuit 17 and the oscilloscope as a display unit.

[0029] like figure 2 As shown, the voltage divider 1 is mainly composed of the voltage divider shell 2, the BNC connector 3, the matching resistor 4, the banana head connector 5, the voltage divider insulator 6, the low-voltage arm resistance-capacitance element 7, the conductive pressure piece 8, and the top cover 9. The basin...

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Abstract

A GIS basin-type insulator distributed capacitor-based bus voltage measurement device disclosed by the present invention is characterized by taking a GIS basin-type insulator scattering capacitor as ahigh-voltage arm and a voltage divider connected with a GIS basin-type insulator as a low-voltage arm, and utilizing the capacitor voltage division principle to measure the voltage between a guide rod in a GIS and a GIS shell, thereby real-timely monitoring the operation voltage of the GIS. In addition, a voltage divider shell and the GIS shell are in equipotential connection, thereby being ableto effectively shield an interference electric field generated by the other electrified equipment of a transformer substation, and guaranteeing the measurement accuracy.

Description

technical field [0001] The invention belongs to the technical field of electric power systems, and in particular relates to a bus voltage measuring device based on the distributed capacitance of GIS pot insulators. Background technique [0002] With the rapid development of the times and economy, the construction of GIS (Gas Insulated Substation, gas insulated substation) [0003] Substation has become an indispensable project in my country's development plan. Different from the previous open power distribution system, GIS substation has the advantages of high reliability, convenient operation, less land occupation, less internal component interference, long maintenance time, convenient installation, low economic cost, and no electromagnetic influence. Therefore, GIS It is widely used in power grids of 110kV and above. In view of the importance of GIS substation in the power system, it is particularly important to monitor the status of power equipment in real time to ensur...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R19/25
CPCG01R19/25G01R31/1254
Inventor 谢施君苟杨苏少春曹树屏张晨萌张榆刘凡曾在田
Owner STATE GRID SICHUAN ELECTRIC POWER CORP ELECTRIC POWER RES INST
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