Capacitor element monitoring method, device and system

A capacitive component and monitoring system technology, applied in the direction of capacitor testing, etc., can solve problems such as high algorithm requirements, difficult capacitor bank faults, failure to timely and accurately find faulty capacitor units, etc., to achieve strong anti-interference ability, guarantee reliability, and online Monitor Efficient Effects

Pending Publication Date: 2022-01-04
GUANGDONG POWER GRID CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the main method of on-line monitoring of capacitor banks is to monitor the changes of capacitor bank voltage and current. Due to the common occurrence of harmonic voltage and current in reactive equipment, the method of voltage and current monitoring requires high algorithm requirements, and it is difficult to detect capacitor bank faults in time. Timely and accurate detection of faulty capacitor units, and targeted maintenance

Method used

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  • Capacitor element monitoring method, device and system
  • Capacitor element monitoring method, device and system
  • Capacitor element monitoring method, device and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] figure 1 It is a structural schematic diagram of the connection between the capacitive element monitoring equipment and the capacitive unit used in the capacitive element monitoring method provided by Embodiment 1 of the present invention; figure 2 It is a flow chart of a capacitive element monitoring method provided by Embodiment 1 of the present invention. This embodiment can be applied to the monitoring of power frame type capacitor banks, and can also be applied to the on-line monitoring of a single capacitive unit. This method can be monitored by capacitive elements equipment to perform, such as figure 1 As shown, the capacitive element monitoring device includes a shock wave detection element and a processing module, and the shock wave detection element is used to be installed on the capacitance unit to detect the shock wave information generated by the capacitance unit; the processing module and the shock wave detection Components are electrically connected; su...

Embodiment 2

[0056] Figure 5 It is a flow chart of a capacitive element monitoring method provided by Embodiment 2 of the present invention, which is optimized on the basis of Embodiment 1 above. Optionally, after determining that the capacitor unit is suspected to be faulty, it includes: sending an early warning message to a mobile terminal of an operation and maintenance personnel.

[0057] Such as Figure 5 As shown, the method includes:

[0058] S210. Acquire shock wave information of the capacitor unit detected by the shock wave detection element.

[0059] S220. Determine the number of occurrences of shock waves based on the shock wave information.

[0060] S230. Determine whether the number of occurrences of shock waves is greater than a preset number of failures.

[0061] If yes, execute steps S240 and S250.

[0062] S240. Determine that the capacitor unit is suspected to be faulty.

[0063] S250. Send the warning information to the mobile terminal of the operation and mainte...

Embodiment 3

[0067] Figure 6 It is a flow chart of a capacitive element monitoring method provided by Embodiment 3 of the present invention, which is optimized on the basis of Embodiment 1 above. Optionally, the number of the shock wave detection elements is multiple, and the multiple shock wave detection elements are respectively used for one-to-one installation on a plurality of capacitor units; the method further includes: obtaining a plurality of the shock wave detection elements Number information of the shock wave detection element obtained by numbering; correspondingly, determining the fault condition of the capacitor unit based on the shock wave information includes: determining the difference between a plurality of the capacitor units based on the shock wave information and the number information of the shock wave detection element Fault conditions.

[0068] Such as Figure 6 As shown, the method includes:

[0069] S310. Acquire shock wave information of the capacitor unit det...

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Abstract

The invention discloses a capacitor element monitoring method, device and system. The capacitor element monitoring method is used for capacitor element monitoring equipment, wherein the capacitor element monitoring equipment comprises a shock wave detection element and a processing module, the shock wave detection element is used for being installed on a capacitor unit to detect shock wave information generated by the capacitor unit, and the processing module is electrically connected with the shock wave detection element. The method comprises the following steps: acquiring shock wave information, detected by a shock wave detection element, of a capacitor unit; and determining the fault condition of the capacitor unit based on the shock wave information. By adopting the scheme, the effects that the online monitoring of the capacitor unit is relatively efficient and the fault condition of the capacitor unit can be found timely and accurately are realized, and the reliability of online monitoring is improved.

Description

technical field [0001] Embodiments of the present invention relate to capacitance monitoring technology, and in particular to a capacitance element monitoring method, device and system. Background technique [0002] At present, the power system frame-type capacitor bank is composed of multiple capacitor units, and the capacitor unit includes multiple capacitor elements. A typical defect of the capacitor bank in daily operation is the breakdown of the capacitor elements inside the capacitor unit, resulting in the occurrence of capacitance Change, when the breakdown of capacitors accumulates to a certain amount, the capacitor bank unbalance protection action trip will occur. In order to detect the faulty unit, it is necessary to arrange an on-site power failure inspection test to detect the capacitance change of the capacitor unit, especially for 35kV and above parallel frame-type capacitor banks, because the number of capacitor units in a capacitor bank is generally 120 and a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/64
CPCG01R31/64
Inventor 张云曾力肖云黄晓波唐松平
Owner GUANGDONG POWER GRID CO LTD
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