A device for measuring the temperature of a fuse in a capacitor

A technology for temperature measurement and capacitors, applied in the field of temperature measurement devices for fuses in capacitors, can solve the problems of increasing fault points, small volume and diameter of inner fuses, poor accuracy, etc., to reduce impact, save layout space, and solve anti-electromagnetic the effect of interference
CN104655321BActive Publication Date: 2018-08-14STATE GRID CORP OF CHINA +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
STATE GRID CORP OF CHINA
Publication Date
2018-08-14

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Abstract

The invention provides a fuse temperature measuring device in a capacitor, comprising an AC constant current source, a fiber grating sensor unit, a fiber grating signal demodulator and a monitoring host; the fiber grating sensor unit is embedded between capacitive elements inside the capacitor, and Reliable contact with the fuse in the capacitor; the fiber grating signal demodulator is connected between the fiber grating sensor unit and the monitoring host; the monitoring host receives the temperature data of the temperature measurement point of the fuse in the capacitor output by the fiber grating signal demodulator, and The fuse temperature measurement point in the capacitor will give a temperature alarm. Compared with the prior art, the device for measuring the temperature of the fuse in the capacitor provided by the present invention can accurately measure the temperature of the fuse in the capacitor under actual operating conditions, provide a basis for the design and selection of the fuse in the capacitor, and effectively Improve the reliability of the internal fuse protection action to ensure that the temperature of the internal fuse will not cause damage to the internal insulation of the capacitor.
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Description

technical field

[0001] The invention relates to a capacitor temperature measuring device, in particular to a capacitor internal fuse temperature measuring device. Background technique

[0002] Power capacitors are mainly used for reactive power compensation of power systems to improve power factor. In order to make it operate more reliably, the current industry mainly considers connecting internal fuses in series with the internal components of the capacitor. When the capacitor fails completely due to dielectric weakness, the internal fuse connected in series with the component will act, so that only a part of the damaged component is isolated, and the capacitor will continue to operate with only a slight power reduction. At this time, the disturbance in the capacitor bank can be ignored, and the total capacity of the capacitor bank will not be significantly affected by the action of a fuse. The introduction of the internal fuse protects the capacitor elements, but virtuall...

Claims

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