Condenser type electric power equipment dielectric loss online test method and system
Condenser type electric power equipment dielectric loss online test method and system
 CN 106,093,593 A
 Filed: 08/05/2016
 Published: 11/09/2016
 Est. Priority Date: 08/05/2016
 Status: Active Application
First Claim
1. a condenser type electric power equipment dielectric loss online test method, it is characterised in that comprise the following steps:
 Electric current on the earth lead of online measurement condenser type power equipment, and described condenser type power equipment busbar voltage mutual inductanceVoltage on device；
The coefficient of each harmonic component of described voltage and described electric current is obtained by Fourier analysis；
The coefficient calculations of each harmonic component according to described voltage and described electric current goes out each time of described voltage and described electric currentThe amplitude of harmonic component；
The amplitude of each harmonic component according to described voltage and described electric current, calculate condenser type power equipment equivalent capacity andEquivalent resistance；
Equivalent capacity and equivalent resistance according to described condenser type power equipment are calculated dielectric loss angle tangent and export.
Chinese PRB Reexamination
Abstract
The present invention relates to a kind of condenser type electric power equipment dielectric loss online test method and system, the voltage on the electric current on the earth lead of online measurement condenser type power equipment, and condenser type power equipment busbar potential transformer.The coefficient of each harmonic component of voltage and current is obtained by Fourier analysis.The coefficient calculations of each harmonic component according to voltage and current goes out the amplitude of each harmonic component of voltage and current.The amplitude of each harmonic component according to voltage and current, calculates equivalent capacity and the equivalent resistance of condenser type power equipment.Equivalent capacity and equivalent resistance according to condenser type power equipment are calculated dielectric loss angle tangent and export.Need not change original voltage measurement and the equipment of current measurement and means, need not accurate synchronization and also can accurately be calculated the dielectric loss of condenser type equipment, avoid the difficulty of voltage and current synchro measure, under voltage and current signal measures out of step conditions, also ensure that the accuracy of measurement of dielectric loss.

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10 Claims

1. a condenser type electric power equipment dielectric loss online test method, it is characterised in that comprise the following steps:

Electric current on the earth lead of online measurement condenser type power equipment, and described condenser type power equipment busbar voltage mutual inductanceVoltage on device； The coefficient of each harmonic component of described voltage and described electric current is obtained by Fourier analysis； The coefficient calculations of each harmonic component according to described voltage and described electric current goes out each time of described voltage and described electric currentThe amplitude of harmonic component； The amplitude of each harmonic component according to described voltage and described electric current, calculate condenser type power equipment equivalent capacity andEquivalent resistance； Equivalent capacity and equivalent resistance according to described condenser type power equipment are calculated dielectric loss angle tangent and export.


2.
Condenser type electric power equipment dielectric loss online test method the most according to claim 1, it is characterised in that described logicalCross the coefficient that Fourier analysis obtains each harmonic component of described voltage and described electric current, including: The coefficient of each harmonic component of described voltage is obtained by Fourier analysis, particularly as follows;

3.
Condenser type electric power equipment dielectric loss online test method the most according to claim 2, it is characterised in that describedThe each harmonic going out described voltage and described electric current according to the coefficient calculations of each harmonic component of described voltage and described electric current dividesThe amplitude of amount, including: The coefficient calculations of each harmonic component according to described voltage goes out the amplitude of each harmonic component of described voltage, specificallyFor;

4.
Condenser type electric power equipment dielectric loss online test method the most according to claim 1, it is characterised in that describedAccording to the amplitude of each harmonic component of described voltage and described electric current, calculate equivalent capacity and the equivalent electric of condenser type power equipmentResistance includes:

5.
Condenser type electric power equipment dielectric loss online test method the most according to claim 1, it is characterised in that describedEquivalent capacity and equivalent resistance according to described condenser type power equipment are calculated dielectric loss angle tangent and include:

6. a condenser type electric power equipment dielectric loss online detecting system, it is characterised in that including:

Current/voltage detection module, the electric current on the earth lead of online measurement condenser type power equipment, and described capacitive batteryVoltage on power equipment busbar potential transformer； Analyze module, obtained the coefficient of each harmonic component of described voltage and described electric current by Fourier analysis； Harmonic component amplitude computing module, goes out described according to the coefficient calculations of each harmonic component of described voltage and described electric currentThe amplitude of each harmonic component of voltage and described electric current； Equivalent capacity and equivalent resistance computing module, according to the amplitude of each harmonic component of described voltage and described electric current, meterCalculate equivalent capacity and the equivalent resistance of condenser type power equipment； Dielectric loss angle tangent computing module, equivalent capacity and equivalent resistance according to described condenser type power equipment are calculatedDielectric loss angle tangent also exports.


7.
Condenser type electric power equipment dielectric loss online detecting system the most according to claim 6, it is characterised in that described pointAnalysis module includes: Voltage harmonic component calculation unit, obtains the coefficient of each harmonic component of described voltage, specifically by Fourier analysisFor;

8.
Condenser type electric power equipment dielectric loss online detecting system the most according to claim 7, it is characterised in that described humorousWave component amplitude computing module includes: Voltage harmonic component amplitude computing unit, goes out described voltage according to the coefficient calculations of each harmonic component of described voltageThe amplitude of each harmonic component, particularly as follows;

9.
Condenser type electric power equipment dielectric loss online detecting system the most according to claim 6, it is characterised in that described etc.Effect electric capacity and equivalent resistance computing module, according to the amplitude of each harmonic component of described voltage and described electric current, calculate condenser typeThe equivalent capacity of power equipment and equivalent resistance, including:

10.
Condenser type electric power equipment dielectric loss online detecting system the most according to claim 6, it is characterised in that describedDielectric loss angle tangent computing module is calculated medium according to equivalent capacity and the equivalent resistance of described condenser type power equipmentLoss angle tangent, including:
Specification(s)