VFTO (very fast transient overvoltage) measurement method and system

A technique for subsystems and measurement results, applied in the field of VFTO measurement methods and systems, can solve the problems of oscilloscope storage capacity, data transmission and processing difficulties, and the total duration is not long, so as to achieve the effect of improving measurement accuracy and reducing difficulty

Active Publication Date: 2012-07-25
CHINA ELECTRIC POWER RES INST +2
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Problems solved by technology

Because the duration of the VFTO process is very long, the amount of single sampling data at a high sampling rate is huge, but the total duration of the high-frequency breakdown process of concern is not long, so a lot of measurement data is of no use value, and the huge amount of measurement data is of great importance to Oscilloscope storage capacity, data transfer and processing all present great difficulties

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  • VFTO (very fast transient overvoltage) measurement method and system
  • VFTO (very fast transient overvoltage) measurement method and system
  • VFTO (very fast transient overvoltage) measurement method and system

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Embodiment Construction

[0029] The present invention will be described more fully hereinafter with reference to the accompanying drawings, in which exemplary embodiments of the invention are illustrated. The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention. The technical solution of the present invention will be described in various aspects below in conjunction with various figures and embodiments.

[0030] figure 1 It is a flowchart of an embodiment of the VFTO measuring method according to the present invention. When the isolating switch in ...

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Abstract

The invention discloses a VFTO (very fast transient overvoltage) measurement method and system, relating to the technical field of overvoltage protection of a power system. The high-frequency component of VFTO is measured by high-resolution continuous sampling, the power-frequency component in the low-frequency component of VFTO is measured by low-resolution single sampling, and the measured data of the high-frequency component and low-frequency component of VFTO is synthesized into a VFTO full waveform. Through the VFTO measurement method and system disclosed by the invention, the high-frequency component and low-frequency component of VFTO are separately measured, and the measured results are synthesized into a full-waveform VFTO, thus the difficulty of VFTO measurement and the requirement for the storage capacity for storing the measured results are reduced, and the accuracy of VFTO measurement is improved.

Description

technical field [0001] The invention relates to the technical field of power system overvoltage protection, in particular to a VFTO (Very Fast Transient Over-voltage, Very Fast Transient Over-voltage) measurement method and system. Background technique [0002] In the power industry, GIS refers to sulfur hexafluoride enclosed combined electrical appliances, which is called "Gas Insulated Switchgear" (Gas Insulated Switchgear) in the world, referred to as GIS. Circuit breakers, isolating switches, grounding switches, voltage transformers, current transformers, surge arresters, busbars, cable terminals, inlet and outlet bushings, etc. are organically combined into a whole through optimized design. The advantages of GIS are small footprint, high reliability, strong security, and small maintenance workload. When the GIS isolating switch opens and closes the no-load short busbar, it will generate a VFTO with a maximum frequency of up to hundreds of MHz, which will cause harm to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 李志兵詹花茂陈维江李成榕王浩陈海波段韶峰颜湘莲欧阳卓刘北阳郑记玲赵承楠
Owner CHINA ELECTRIC POWER RES INST
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