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High-temperature aging estimation device for DC cable insulating material based on composite field

A technology of DC cables and insulating materials, applied in the direction of testing dielectric strength, etc., can solve the problems of cable insulation electrical tree aging, breakdown, threat to cable insulation safety and service life, etc., to ensure accuracy and test temperature. Controlled and accurate effect

Inactive Publication Date: 2018-11-23
TIANJIN UNIV
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Problems solved by technology

However, it can be as high as 150°C in a short period of time when a fault occurs, which seriously affects the safe operation of power cables.
For the operation process of high-voltage DC cables, they are under a certain amplitude of DC voltage, but the pulse voltage introduced due to lightning strikes, commutation failures, operating overvoltages, etc. will have an adverse impact on the working environment and easily cause cable insulation. The aging and breakdown of electrical branches seriously threaten the safety and service life of cable insulation

Method used

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  • High-temperature aging estimation device for DC cable insulating material based on composite field
  • High-temperature aging estimation device for DC cable insulating material based on composite field
  • High-temperature aging estimation device for DC cable insulating material based on composite field

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Embodiment Construction

[0032] In the following, specific examples are given in conjunction with the accompanying drawings to further illustrate how the device and method for aging assessment of high-temperature insulating materials based on DC superimposed pulse compound field of the present invention are realized.

[0033] Such as Figure 6 As shown, the present invention provides a high-temperature aging evaluation device for insulating materials based on a composite electric field, which is mainly composed of an experimental device, an electric tree branch observation device, a DC superimposed pulse power supply device, and a terminal 1, which is provided with a Matlab language data analysis platform , the electric tree branch observation device observes and records the sample change data in the experimental device acting on the DC superimposed pulse power supply device, and transmits the change data in the sample to the terminal 1, and the Matlab language data analysis platform in the terminal 1 ...

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Abstract

The invention discloses a high-temperature aging estimation device for a DC cable insulating material based on a composite field, and the device mainly consists of an experiment apparatus, an electrical tree observation apparatus, a DC superposition pulsed power supply apparatus and a terminal. The interior of the terminal is provided with a Matlab language data analysis platform, and the electrical tree observation apparatus records the test sample change data in the experiment apparatus, and transmits the data to the terminal. The device effectively simulates the working conditions of a DC cable in actual operation.

Description

technical field [0001] The invention belongs to the field of high-voltage equipment, and in particular relates to a high-temperature aging degree evaluation device for DC cable insulation materials based on a DC superimposed pulse compound field. Background technique [0002] In HVDC cables, the temperature of the cable insulation is related to the cable load. When working at full capacity, the temperature generated by the current passing through the cable conductor is as high as 90°C. This temperature is already much higher than room temperature. And it can be as high as 150°C in a short time when a fault occurs, which seriously affects the safe operation of the power cable. For the operation process of high-voltage DC cables, they are under a certain amplitude of DC voltage, but the pulse voltage introduced due to lightning strikes, commutation failures, operating overvoltages, etc. will have an adverse impact on the working environment and easily cause cable insulation....

Claims

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Application Information

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IPC IPC(8): G01R31/12
Inventor 朱乐为杜伯学田猛苏金刚韩涛李进
Owner TIANJIN UNIV
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