Power frequency follow current testing device and application method thereof

A test device and power frequency freewheeling technology, applied in measuring devices, overload protection devices, test circuits, etc., can solve the problems of low voltage and current levels, small output maximum power frequency short-circuit current amplitude, and difficulty in simulating arrester working conditions and other issues to achieve the effect of ensuring reliability and high reliability

Pending Publication Date: 2017-12-22
STATE GRID HUNAN ELECTRIC POWER +2
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] However, the impulse voltage generator system and power frequency test power supply system in the existing power frequency freewheeling test device often have shortcomings such as low output voltage and current leve...

Method used

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  • Power frequency follow current testing device and application method thereof
  • Power frequency follow current testing device and application method thereof
  • Power frequency follow current testing device and application method thereof

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Embodiment Construction

[0027] In order to make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are the present invention. Invented some embodiments, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0028] figure 1 It is a structural block diagram of a power frequency continuous current test device provided by an embodiment of the present invention, such as figure 1 As shown, the power frequency continuous current test device includes: an impulse power supply 101, a power frequency power supply 102, a product to be tested 103, a power frequenc...

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Abstract

The invention provides a power frequency freewheeling test device and its use method, wherein the device includes: a power transformer used to convert the grid voltage into a power frequency voltage, the inter-turn insulation material of the winding of the power transformer is yellow wax silk, The interlayer insulating material is made of glass fiber-wrapped flat wire; the impulse voltage generator with the capacitance of the charging capacitor of 0.05μF, the resistance of the wave head resistance of 80Ω and the resistance of the wave tail resistance of 2100Ω; the impulse voltage generator and the protection of the impact side The output terminal after the circuit is connected in series is connected in parallel with the product to be tested; the output terminal after the parallel connection of the power transformer and the protection circuit on the power frequency side is connected in parallel with the product to be tested; and the control measurement circuit is used to judge whether to trigger the impulse voltage according to the phase of the power frequency voltage . The invention can better simulate the situation that the lightning arrester encounters lightning waves during the operation of hanging on the grid, and can withstand higher overvoltage and overcurrent, and does not need too many protection circuits under the premise of ensuring high reliability.

Description

Technical field [0001] The invention relates to the technical field of electrical engineering, and more specifically, to a power frequency continuous current test device and a method of use thereof. Background technique [0002] Lightning strikes are widespread in power systems. According to statistics, 70% of power outages and trips in power systems are caused by lightning. Zinc oxide arresters are installed in the power system to divert the lightning current and suppress the amplitude of lightning overvoltage. With the continuous development of the power system, power users have put forward higher requirements for the reliability and stability of power equipment. Therefore, it is necessary to test the lightning arrester in the power system to evaluate its stability under the action of lightning overvoltage Sex and reliability. [0003] Existing power frequency continuous current test devices include: impulse voltage generator system for outputting impulse voltage, power frequen...

Claims

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Application Information

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IPC IPC(8): G01R31/14G01R31/00G01R1/28G01R1/36
CPCG01R31/1227G01R1/28G01R1/36G01R31/003
Inventor 陆佳政谢鹏康蒋正龙方针李波胡建平
Owner STATE GRID HUNAN ELECTRIC POWER
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