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Method for fault simulation test of capacitor voltage transformer

A technology of voltage transformer and fault simulation, applied in the direction of instruments, measuring electrical variables, measuring devices, etc., can solve the problems of not covering various accident conditions, limited data volume, single fault data, etc.

Active Publication Date: 2013-10-09
FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The above two technologies, the first method can simulate the influence of various parameter changes on the capacitor voltage transformer through modeling and simulation. However, there will be some differences between the simulation results and the actual operation of the capacitor voltage transformer, and It cannot truly reflect the fault status of the actual capacitor voltage transformer; the second method is only the fault data after a single accident, and the amount of data obtained is relatively limited and cannot cover various accident situations

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  • Method for fault simulation test of capacitor voltage transformer

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Experimental program
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Effect test

Embodiment 1

[0047] The capacitive voltage transformer fault simulation test method of the present embodiment mainly includes the following steps:

[0048] (1) On-site capacitive voltage transformers are respectively provided with connection terminals from both ends of each capacitive element of the C1 unit.

[0049] (2) According to the capacitive element of the short-circuit of C1 unit in the fault simulation state, short-circuit the corresponding terminals respectively.

[0050] (3) Loading a reference voltage to the primary side of the capacitive voltage transformer, and detecting the output voltage of the secondary side.

[0051] (4) According to the reference voltage and the output voltage, the device parameters of the capacitive voltage transformer in the corresponding fault simulation state are obtained.

[0052]The above-mentioned capacitive voltage transformer fault simulation test method, in step (1), specifically, is to transform the capacitive voltage transformer based on the...

Embodiment 2

[0068] The capacitive voltage transformer fault simulation test method of the present embodiment mainly includes the following steps:

[0069] (1) On-site capacitive voltage transformers are provided with access terminals for connecting parallel capacitors at the medium voltage end and ground end of the C2 unit.

[0070] (2) Calculate the capacitance of the parallel capacitor according to the number of capacitive elements broken down by the C2 unit in the fault simulation state, and connect the parallel capacitor with the corresponding capacitance value to the access terminal.

[0071] (3) Loading a reference voltage to the primary side of the capacitive voltage transformer, and detecting the output voltage of the secondary side.

[0072] (4) According to the reference voltage and the output voltage, the device parameters of the capacitive voltage transformer in the corresponding fault simulation state are obtained.

[0073] The above-mentioned capacitive voltage transformer ...

Embodiment 3

[0086] The capacitive voltage transformer fault simulation test method of the present embodiment mainly includes the following steps:

[0087] (1) Based on the on-site capacitive voltage transformer, an adjustable capacitor is connected between the medium voltage terminal and the ground terminal of the C2 unit.

[0088] (2) Calculate the capacitance of the parallel capacitor according to the number of capacitive elements broken down by the C2 unit in the fault simulation state, and adjust the adjustable capacitor to the corresponding capacitance value.

[0089] (3) Loading a reference voltage to the primary side of the capacitive voltage transformer, and detecting the output voltage of the secondary side.

[0090] (4) According to the reference voltage and the output voltage, the device parameters of the capacitive voltage transformer in the corresponding fault simulation state are obtained.

[0091]In the above-mentioned capacitive voltage transformer fault simulation test m...

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Abstract

Provided is a method for a fault simulation test of a capacitor voltage transformer. The method for the fault simulation test of the capacitor voltage transformer comprises the following steps of (1) arranging wiring terminals at the two ends of each capacitor element of a C1 unit of the capacitor voltage transformer on the basis of the capacitor voltage transformer on site, (2) carrying out short circuits on wiring terminals corresponding to short-circuited capacitor elements according to the short-circuited capacitor elements of the C1 unit in a fault simulation state, (3) loading reference voltage on a primary side of the capacitor voltage transformer, detecting output voltage of a secondary side of the capacitor voltage transformer, and (4) obtaining equipment parameters which correspond to the capacitor voltage transformer in the fault simulation state according to the reference voltage and the output voltage. The method for the fault simulation test of the capacitor voltage transformer can cover a plurality of fault conditions, can obtain the equipment parameters which more objectively reflect the actual fault conditions in site operation due to the fact that the simulation test is carried out on the basis of the capacitor voltage transformer on site, and provides data supporting which is higher in accuracy and wider in coverage for research of the capacitor voltage transformer.

Description

technical field [0001] The invention relates to the technical field of capacitor voltage transformers, in particular to a fault simulation test method for capacitor voltage transformers. Background technique [0002] Capacitor Voltage Transformer (CVT) is widely used in power systems. It is a power device for voltage measurement, power measurement and control, automatic control, relay protection and also as a power line carrier capacitor. Due to its small impact strength , small size, light weight, reliable damping of ferromagnetic resonance and excellent transient response characteristics in practical applications, gradually replacing electromagnetic voltage transformers, is an indispensable equipment in the power grid. During the operation of capacitive voltage transformers, there may be equipment defects such as increased dielectric loss and abnormal secondary voltage due to internal moisture, aging, and breakdown of internal capacitive elements. In severe cases, explosio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R35/02
Inventor 王岩詹清华林浩李慧胡聪黄林陈志平张伟忠何胜红姜胜宝国江
Owner FOSHAN POWER SUPPLY BUREAU GUANGDONG POWER GRID
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