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Transient analysis method and device for extra-high voltage parallel capacitor and storage medium

A transient analysis, capacitor technology, applied in circuit devices, measuring devices, instruments, etc., can solve problems such as difficult to find defects, aging capacitor components, bulging, and group explosions

Inactive Publication Date: 2020-09-11
STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

UHV shunt capacitors have been working in the open air for a long time, and are in full load operation. Factors such as high voltage, high current, and system harmonics will aggravate the aging problem of capacitor components, and partial discharge, flashover, etc. will occur, and more serious cases will cause bulging , group explosions, affecting the safe operation of the power grid and the life safety of maintenance personnel
[0003] At present, the most commonly used monitoring method for UHV shunt capacitors is mainly regular preventive tests and low-voltage tests after power outages, so it is difficult to find defects

Method used

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  • Transient analysis method and device for extra-high voltage parallel capacitor and storage medium
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  • Transient analysis method and device for extra-high voltage parallel capacitor and storage medium

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Embodiment 1

[0045] The first embodiment of the present invention proposes a transient analysis method for UHV shunt capacitors, such as figure 1 shown, including:

[0046] S10. Determine the synchronous transient capacitor current of the synchronous closing of the parallel capacitor group and the non-synchronous transient capacitor current of the non-synchronous closing based on the current grid parameters;

[0047] S20. Respectively establish a relationship model between the synchronous transient capacitor current and the initial phase angle and between the non-synchronous transient capacitor current and the initial phase angle;

[0048] S30. Determine the closing current of the parallel capacitor bank according to the relationship model.

[0049] The method of the present invention determines the synchronous transient capacitor current of the synchronous closing and the non-synchronous transient capacitor current of the non-synchronous closing of the parallel capacitor group based on t...

Embodiment 2

[0152] The second embodiment of the present invention proposes a transient analysis device for UHV shunt capacitors, including:

[0153] The data processing unit is used to determine the synchronous transient capacitor current of the synchronous closing of the shunt capacitor group and the non-synchronous transient capacitor current of the non-synchronous closing based on the current power grid parameters;

[0154] A model building unit, configured to respectively establish a relationship model between the synchronous transient capacitor current and the initial phase angle and between the non-synchronous transient capacitor current and the initial phase angle;

[0155] The current calculation unit is used to determine the closing current of the parallel capacitor bank according to the relationship model.

Embodiment 3

[0157] The third embodiment of the present invention proposes a computer-readable storage medium, the computer-readable storage medium stores an implementation program for information transmission, and when the program is executed by a processor, it implements the aforementioned transient analysis of UHV shunt capacitors The method, in a specific embodiment, is used to determine the synchronous transient capacitor current of the synchronous closing and the non-synchronous transient capacitor current of the non-synchronous closing of the shunt capacitor group based on the current power grid parameters;

[0158] Respectively establish the relationship models between the synchronous transient capacitor current and the initial phase angle and the non-synchronous transient capacitor current and the initial phase angle;

[0159] The closing current of the parallel capacitor bank is determined according to the relationship model.

[0160] Those skilled in the art should understand th...

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Abstract

The invention discloses a transient analysis method and device for an extra-high voltage parallel capacitor and a storage medium. The method comprises the steps: determining the current of a synchronous transient capacitor in a synchronous closing state and the current of a non-synchronous transient capacitor in a non-synchronous closing state of a parallel capacitor bank based on a current powergrid parameter; respectively establishing a relation model between the synchronous transient capacitor current and an initial phase angle and a relation model between the non-synchronous transient capacitor current and the initial phase angle; and determining the closing current of a parallel capacitor bank according to the relationship model. According to the method, the transient running currentof the capacitor can be obtained, and the running state of the extra-high voltage parallel capacitor can be monitored.

Description

technical field [0001] The invention relates to the technical field of power supply services, in particular to a method, device and storage medium for transient analysis of UHV shunt capacitors. Background technique [0002] The charging power of the UHV transmission line is large. With the change of the system mode, the power flow of the line changes greatly, and the reactive power in the UHV transmission system changes greatly. Therefore, the UHV transmission system needs sufficient reactive power adjustment methods. The 110kV shunt capacitor on the low-voltage side of the main transformer of UHV substation is an important means of reactive power regulation, and its normality directly affects the safe operation of UHV substation. UHV shunt capacitors have been working in the open air for a long time, and are in full load operation. Factors such as high voltage, high current, and system harmonics will aggravate the aging problem of capacitor components, and partial discharg...

Claims

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Application Information

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IPC IPC(8): H02J3/00H02J13/00G01R31/00
CPCG01R31/00H02J3/00H02J13/00002H02J13/00032H02J2203/20
Inventor 赵小娟王瑞妙廖峥周亚琪李慧慧张友强朱小军樊晓伟姚欣愚廖玉祥王灵龙王光强付昂杨爽马兴董光德宫林
Owner STATE GRID CHONGQING ELECTRIC POWER CO ELECTRIC POWER RES INST
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