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Loss test method and system of filter capacitor, and medium

A technology of filter capacitors and test methods, applied in dielectric performance measurement, instruments, measurement devices, etc., can solve the problem of inaccurate loss of filter capacitors, achieve reasonable selection and application, accurate calibration results, and improve reliability. Effect

Active Publication Date: 2021-04-09
STATE GRID NINGXIA ELECTRIC POWER CO +2
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The embodiment of the present invention provides a filter capacitor loss testing method, medium and system to solve the problem in the prior art that the loss of the filter capacitor is not accurate

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  • Loss test method and system of filter capacitor, and medium
  • Loss test method and system of filter capacitor, and medium
  • Loss test method and system of filter capacitor, and medium

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Embodiment Construction

[0013] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0014] The invention discloses a loss testing method of a filter capacitor. Such as figure 1 As shown, the loss test method includes the following steps:

[0015] Step S1: Build a loss test circuit for the filter capacitor unit.

[0016] Among them, such as figure 2 As shown, the loss test circuit includes: a filter capacitor unit and a loss test bridge 4 . The filter capacitor unit includes: a filter capacitor element 1 and a connecting row 3 . ...

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Abstract

The invention discloses a loss test method and system of a filter capacitor, and a medium. The loss test method comprises the following steps: establishing a loss test circuit of a filter capacitor unit; testing dielectric loss factors of the to-be-tested filter capacitor elements corresponding to different frequencies; calculating the mean value of the dielectric loss factors of all the to-be-tested filter capacitor elements corresponding to the same frequency; drawing a dielectric loss factor curve by taking the frequency as an abscissa and the mean value of the dielectric loss factors as an ordinate; testing to obtain the loss value of the filter capacitor unit corresponding to the frequency 50Hz under the rated voltage; calculating a loss value of the connection bar corresponding to the frequency of 50Hz; calculating the loss value of the filter capacitor unit corresponding to each preset frequency; and calculating the sum of the loss value of the filter capacitor unit corresponding to the frequency 50Hz under the rated voltage and the loss values of the filter capacitor units corresponding to all the preset frequencies to obtain the total loss value of the filter capacitor units. The test result of the method is more accurate.

Description

technical field [0001] The invention relates to the technical field of filter capacitors, in particular to a loss test method, medium and system for filter capacitors. Background technique [0002] The rated current of the capacitor is determined by the root mean square value of the fundamental current and all harmonic currents. This algorithm has the following problems: ①The dielectric structure of the capacitor element has different dielectric losses at different frequencies, and all harmonics are treated with the same thermal effect The conversion is not accurate; ②The plate of the capacitor element is wound by aluminum foil, which has distributed inductance and distributed resistance. The distributed inductance and distributed resistance make the current of different frequencies have different distributions on the capacitor element, which also leads to different frequency The power loss of the capacitor element is different under the current. [0003] Therefore, simply ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/26
CPCG01R27/2694Y02E40/40
Inventor 史磊柴斌尤鸿芃吴鹏姚成雷战斐宋海龙刘若鹏刘钊李昊毛春翔邓沛
Owner STATE GRID NINGXIA ELECTRIC POWER CO
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