System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement

A partial discharge detection and partial discharge technology, which is applied in the direction of measuring electrical variables, measuring devices, measuring current/voltage, etc., can solve problems such as difficulty in on-site installation, insufficient measurement frequency band of VFTO measurement system, and susceptibility to external interference

Active Publication Date: 2012-07-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +1
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  • Abstract
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Problems solved by technology

[0022] In view of the shortcomings of the existing partial discharge measurement system mentioned in the above background technology, such as being susceptible to external interference, complex structure, and difficult on-site installation,

Method used

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  • System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement
  • System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement
  • System for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement

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Embodiment Construction

[0038] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0039] figure 1 A schematic diagram of probe installation according to an embodiment of the present invention is shown, and the system probe includes a metal electrode (110), a dielectric material (120), a casing (130) and a signal output port (140). When the measurement system is installed, the system measurement probe is fixed on the GIS cavity (150) with bolts. The probe can measure electromagnetic waves generated by partial discharge or transient overvoltage on the guide rod (160) in the GIS.

[0040] figure 2 An embodiment according to the present invention is shown, including: a probe (210), a path selector (220), a partial discharge detection amplification unit (230), a VFTO secondary voltage divider unit (2...

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Abstract

The invention discloses a system for GIS (Global Information System) partial discharge measurement and VFTO (Very Fast Transient Overvoltage) measurement in the technical field of online monitoring systems of electric equipment. The system comprises a probe, a circuit selector, a partial discharge detection amplifying unit, a VFTO secondary partial pressure unit, a signal collecting and processing unit and an oscilloscope. The measurement system can use one probe to perform GIS partial discharge and VFTO measurement, and the two original systems are combined to the same system to reduce the GIS monitoring cost; the special probe design improves the measurement sensitivity of partial discharge; and the preferable VFTO secondary unit design improves the glancing flatness of wide frequency band measurement of a VFTO sensor.

Description

technical field [0001] The invention belongs to the technical field of on-line monitoring systems for electrical equipment, and in particular relates to a system for measuring partial discharge and VFTO in GIS. Background technique [0002] Gas-insulated metal-enclosed switchgear (GIS) has the advantages of small footprint, environmental protection, long life, easy installation and maintenance, and easy control. It has been widely used in my country's power systems, especially in UHV substations. Electrical Equipment. In the present invention, the inventor proposes a system that can be used for partial discharge monitoring and VFTO measurement in GIS at the same time. [0003] (1) Partial discharge measurement [0004] GIS partial discharge refers to the discharge phenomenon that occurs in the local area of ​​the GIS insulation structure, including: free metal particle discharge, suspended potential body discharge, surface discharge, internal air gap discharge of insulating...

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Application Information

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IPC IPC(8): G01R31/12G01R19/00
Inventor 李成榕孙岗马国明陈国强孙泽来郭攀辉
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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