Unlock instant, AI-driven research and patent intelligence for your innovation.

GIS insulation fault testability evaluation method

A testability evaluation and insulation fault technology, applied in the computer field, can solve problems such as equipment breakdown and discharge detection with great differences in difficulty

Active Publication Date: 2021-02-19
ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD +1
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual production, GIS equipment breakdown due to insulation faults occurs from time to time. At this stage, partial discharge testers are generally used for discharge detection
However, due to the different GIS structure design, the difficulty of discharge detection varies greatly. Therefore, it is necessary to evaluate the testability of GIS insulation faults and promote the optimization of GIS structure design.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • GIS insulation fault testability evaluation method
  • GIS insulation fault testability evaluation method
  • GIS insulation fault testability evaluation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 1 A flow chart of the GIS insulation fault testability evaluation method in the embodiment of the present invention is shown, and the details are as follows:

[0027] S101. The over-tip discharge device simulates the GIS insulation fault, the magnitude of the discharge corresponds to the severity of the insulation fault, and the position of the simulation device is changed to simulate that the fault occurs in different gas chambers;

[0028] S102, by installing the partial discharge simulation device in different gas chambers and applying different voltages to simulate various insulation fault states, and through the partial discharge tester test, establish the corresponding relationship between the tester test result and the insulation fault;

[0029] S103. Select a GIS gas chamber to place a partial discharge simulation device for insulation fault simulation by means of a blind test, and determine the placement position and partial discharge amount of the parti...

Embodiment 2

[0041] 1. The tip discharge device such as figure 2 As shown in the figure, the discharge electrode is in the glass gas chamber and is filled with SF6 gas according to the gas chamber pressure during the operation of the GIS to simulate the discharge situation during the operation of the GIS. The device is calibrated by the partial discharge test pulse current method, and the voltage is adjusted to make the tip discharge. The device generates 3pC, 5pC, 7pC, 9pC, 11pC, 13pC and records the corresponding voltage values.

[0042] 2. Put the tip discharge device into the GIS gas chamber, one end is connected with the GIS conductor part, the other end is connected with the GIS shell, and fixed with metal copper foil, seal the GIS gas chamber, and apply voltage through the GIS conductor to make the tip discharge device generate partial discharge, Partial discharge values ​​were obtained by a pulsed amperometric measuring device. Use a partial discharge tester to test at different po...

Embodiment 3

[0048] (1) The GIS part of the structure is described as follows image 3 and Figure 4 As shown in the figure, there are three partial discharge test windows PD1, PD2, PD3 (only part of one phase and one bus is shown in the figure, which does not mean that the GIS has only three test windows, and no special explanation will be given below). As shown in the figure, the points A1 and B are the positions close to the PD test window, A2, C, and D are the mid-distance positions from the PD test window, and A3 is the position far from the PD test window.

[0049] (2) The interior of the GIS is not inflated, and the prototype is partially discharged as a whole. Before the test, all isolation fractures are closed and grounded. In the GIS gas chamber, according to the requirements, the tip discharge device (one end is connected to the GIS conductor part, and the other end is connected to the GIS shell), apply voltage to the GIS conductor, make the tip discharge device generate partia...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a GIS insulation fault testability evaluation method. The method comprises the steps of enabling a point discharge device to simulate a GIS insulation fault, enabling the magnitude of discharge capacity to correspond to the severity of the insulation fault, and changing the position of a simulation device to simulate that the fault occurs in different air chambers, installing the partial discharge simulation device in different air chambers and applying different voltages to simulate various different insulation fault states, and building the corresponding relation between the test result of the tester and the insulation fault through the test of the partial discharge tester. Through a blind test mode, a GIS air chamber is selected to place the partial discharge simulation device for insulation fault simulation, the placement position and the partial discharge capacity of the partial discharge simulation device are tested and judged through the partial dischargetester and compared with the actual situation, and accordingly the insulation fault testability of the GIS is evaluated. According to the embodiment of the invention, the GIS with different structural designs is objectively evaluated in a simulated discharge test mode, and the method plays a guiding role in optimizing the GIS structural design by a manufacturer and selecting the GIS model by a user.

Description

technical field [0001] The invention relates to the technical field of computers, in particular to a testability evaluation method for GIS insulation faults. Background technique [0002] GIS (GAS insulated SWITCHGEAR) is the English abbreviation of gas insulated fully enclosed combined electrical appliances. GIS consists of circuit breakers, isolating switches, grounding switches, transformers, arresters, busbars, connectors and outgoing terminals, etc. These devices or components are all enclosed in a metal grounded shell, and filled with a certain pressure of SF6 insulating gas inside , so it is also called SF6 fully enclosed combination appliance. GIS is an important switchgear in the power grid, and it is widely used in various substations, and its performance is related to the operation safety of the power grid. With the deepening of the reform of the power system, improving the quality of power equipment and reducing operating failures has become one of the importan...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/16G01R31/12
CPCG01R31/16G01R31/1254
Inventor 苏毅芦宇峰夏小飞饶夏锦张帅彭在兴邬蓉蓉罗传胜江泽令
Owner ELECTRIC POWER RES INST OF GUANGXI POWER GRID CO LTD