GIS combined electric appliance dynamic characteristic test data correction method
A technology of combined electrical appliances and test data, which is applied in the direction of instruments, measuring electronics, and measuring devices, can solve the problems of dynamic characteristic parameter errors, misjudgment and misjudgment, unfavorable long-term stable use of GIS combined electrical appliances, etc., to ensure effectiveness and reduce error, the effect of increasing credibility and validity
Pending Publication Date: 2021-12-28
GUANGDONG POWER GRID CO LTD +1
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Problems solved by technology
[0003] Although the GIS combined electrical appliance has many of the above advantages, due to its fully enclosed characteristics, there are also difficulties in fault warning and maintenance. After a fault, the maintenance cycle of the power outage is long, the scope is wide, and the cost is high. People have proposed to use indirect measurement methods to obtain internal electromagnetic and pulse signals (dynamic characteristic parameters), and analyze and judge the internal working status or fault symptoms of GIS combined electrical appliances based on this, so as to realize the monitoring and fault warning of GIS combined electrical appliances. Due to the influence of the installation and working status of the internal components of the closed structure of the combined electrical appliance and the influence of the medium such as the internal insulating gas, there are large errors in the obtained dynamic characteristic parameters, which will easily lead to misjudgment and misjudgment in practical applications, which is not conducive to the long-term use of GIS combined electrical appliances. stable use
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[0044] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiment of the application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiment of the application. Obviously, the described embodiment is only It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0045] For GIS combined electrical appliances, although there are a lot of dynamic characteristic test data involved, there are mainly two types of test data that have been proved to be effective after practical application. The unbalanced pulse signal used to monitor the partial discharge phenomenon caused by abnormal working conditions, etc., one is the leakage e...
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Abstract
The invention discloses a GIS combined electric appliance dynamic characteristic test data correction method, and relates to the technical field of GIS combined electric appliances. An unbalanced pulse signal and a leakage electromagnetic wave signal of a to-be-tested GIS combined electric appliance are obtained, a plurality of different preset initial electrical actions or initial abnormal fault states are applied to the to-be-tested GIS combined electric appliance cumulatively, a function fitting relationship between the initial equivalent discharge capacity corresponding to the unbalanced pulse signal and the initial accumulated signal energy of the leakage electromagnetic wave signal is established, so that correction and error correction can be carried out according to the function fitting relationship, the data validity is ensured, and meanwhile, the corrected equivalent discharge capacity corresponding to the corrected unbalanced pulse signal and the corrected accumulated signal energy of the corrected leakage electromagnetic wave signal are obtained by obtaining the optimal measurement period, the equivalent discharge capacity corresponding to the optimal measurement period and the leakage electromagnetic wave signal, so that the error of the dynamic characteristic parameter is reduced; and the credibility and the effectiveness of the dynamic characteristic data are improved.
Description
technical field [0001] The present application relates to the technical field of GIS combined electrical appliances, in particular to a method for correcting test data of dynamic characteristics of GIS combined electrical appliances. Background technique [0002] GIS combined electrical appliances, also known as gas-insulated fully enclosed combined electrical appliances, are composed of circuit breakers, isolating switches, grounding switches, transformers, lightning arresters, busbars, connectors and outlet terminals, etc., and are protected by fully enclosed metal grounding shells, and in The inside of the shell is filled with a closed electrical structure formed by SF6 insulating gas. GIS combined electrical appliances have the characteristics of good insulation, little influence from the external environment, long maintenance cycle, and convenient use. At the same time, their structure is compact and stable, easy to install, and occupy a small space. It is widely used ...
Claims
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Login to View More IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 梁煜健肖勇刘明邸龙胡峰杜茵高宜凡梁若文谭建敏甘燕良林建文梁炳钧尤德柱李丰罗航宇
Owner GUANGDONG POWER GRID CO LTD