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DC long-term live-line test method and critical DC electric intensity determination method thereof

A technology of electric strength and long-term electrification, applied in the direction of testing dielectric strength, etc., can solve problems such as only electric life evaluation

Inactive Publication Date: 2015-04-08
PINGGAO GRP +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] There are different methods for evaluating the electrical life of epoxy electrical insulating materials at home and abroad. The more mature one is the thermoelectric aging test of epoxy electrical insulating materials at 90°C and 3kV / mm conducted by Xi'an Jiaotong University in accordance with IEC TS 61251-2008. , Japan's Toshiba uses a special sample to invent a pure electrical aging test, both of which are to test the electric strength (internal) of the material at a specific time and perform time logarithmic curve drawing and extrapolation to obtain a specific electric strength The (internal) value is used as a criterion to evaluate the electrical life, but it is limited to the evaluation of the electrical life of epoxy electrical insulating materials under AC conditions, and is used for long-term charging tests and electrical life judgments of epoxy electrical insulating materials under DC conditions. method has not been reported

Method used

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  • DC long-term live-line test method and critical DC electric intensity determination method thereof
  • DC long-term live-line test method and critical DC electric intensity determination method thereof
  • DC long-term live-line test method and critical DC electric intensity determination method thereof

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Embodiment Construction

[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0018] Such as figure 1 Shown is a typical long-term electrified test system, including gas systems (gas cylinders, valves, flow controllers, air pumps and barometers), the main functions of which are gas supply, gas pressure measurement, gas recovery and treatment (if the insulating medium is insulating oil etc., then directly rush into the charging room); the temperature control system (heating system and thermometer), the main function is to maintain the temperature of the charging room; the DC long-term charging room (sample rack, oven, sample, loading electrode, electrode wiring, etc.) The core device of the long-term live test; the voltage loading system (high-voltage DC regulated power supply, DC voltmeter, voltage dividing resistor, insulator, etc.), the main function is to provide stable DC high voltage.

[0019] The basic test process is as follows...

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Abstract

The invention relates to a DC long-term live-line test method and a critical DC electric intensity determination method thereof. Under the DC condition, no relevant standards, no corresponding test method and no evaluation system for endurance of epoxy type electrical insulating materials exist in the prior art, and electric life evaluation of the electrical insulating materials under the DC voltage condition has no clear way. The method is a DC long-term live-line test and electric life evaluation method suitable for the epoxy type electrical insulating materials. According to the method, material sample dimension, loading voltage, loading time, intermediate parameter measurement mode, extrapolation curve drafting, life determination bases are prescribed, important bases are provided for endurance and electric life evaluation of the electrical insulating materials under the DC voltage condition, and thereby technical support is provided for integral life evaluation of electric power equipment.

Description

technical field [0001] The present invention relates to an electrode loading method and device for the DC long-term electrification test method of epoxy electrical insulating materials, and a DC long-term electrification test method and test system using the loading method and device, especially the DC long-term electrification test method and Its critical DC electric strength determination method. Background technique [0002] There is a general rule for the durability evaluation of electrical insulating materials under AC power frequency voltage (IEC TS 61251-2008), especially epoxy electrical insulating materials (such as fiber reinforced epoxy materials, epoxy casting materials, APG Injection of epoxy materials, etc.), some typical test methods (such as thermoelectric aging test) have been formed according to this general rule, but there are no relevant standards, corresponding test methods and evaluations for the durability of epoxy electrical insulation materials under...

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 田浩袁端鹏李继承林生军郭煜敬韩丽娟张柳丽
Owner PINGGAO GRP
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