Power transformer winding deformation state multi-information detection method and device

A transformer winding and power transformer technology, which is applied in the direction of electric winding test, electromagnetic measuring device, electric/magnetic solid deformation measurement, etc. It can solve the problems of unable to effectively detect the operation status of power transformer winding, fault location and type, single detection signal, etc. , to enrich the detection signal database, overcome limitations, and realize the effect of online detection

Active Publication Date: 2017-02-22
STATE GRID LIAONING ELECTRIC POWER RES INST +2
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  • Application Information

AI Technical Summary

Problems solved by technology

The present invention detects the frequency characteristics of the power transformer, detects the current, voltage and phase angle of the high and low voltage sides, detects the ultrasonic signal, detects the vibration signal, and realizes the online detection of the deformation

Method used

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  • Power transformer winding deformation state multi-information detection method and device
  • Power transformer winding deformation state multi-information detection method and device
  • Power transformer winding deformation state multi-information detection method and device

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Embodiment Construction

[0030] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0031] Taking the S11-M-500 / 35 type power transformer as an example, multi-information detection is carried out on the deformation state of the power transformer winding. Multi-information detection method for power transformer winding deformation state, such as figure 1 shown, including the following steps:

[0032] Step 1: Obtain the amplitude-frequency response characteristics of the transformer winding by means of frequency sweep detection,

[0033] Apply a sine wave excitation source at one end of the transformer winding, continuously change the frequency of the sine wave excitation source, measure the ratio of the signal amplitude of the response terminal voltage and the excitation terminal voltage at different frequencies, and obtain the winding under the condition of the specified excitation terminal and response terminal Am...

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Abstract

The invention relates to a power transformer winding deformation state multi-information detection method and device, and belongs to the technical field of power equipment fault diagnosis. The method comprises the steps of detecting current, voltage and a phase angle at a high voltage side and a low voltage side, detecting ultrasonic signals, detecting vibration signals, thereby realizing online detection, fault phase detection, fault position detection and fault type detection for the winding deformation state, and effectively solving a problem that the running state, the fault position and the fault type of a power transformer winding cannot be effectively detected because of the simplified detection signals. The device comprises a voltage transformer, a current transformer, an ultrasonic probe, a vibration sensor, a signal conditioning circuit, an AD conversion circuit and a central processing unit, wherein the output ends of the voltage transformer, the current transformer, the ultrasonic probe and the vibration sensor are connected with the input end of the signal conditioning circuit, the output end of the signal conditioning circuit is connected with the input end of the central processing unit through the AD conversion circuit, and the output end of the central processing unit is connected with a communication bus.

Description

technical field [0001] The invention belongs to the technical field of electric equipment fault diagnosis, and in particular relates to a multi-information detection method and device for the deformation state of a power transformer winding. Background technique [0002] With the reform and opening up and the rapid growth of my country's economy, users' demand for electric power has increased sharply, and it is urgent to require my country's power grid to provide users with safe and reliable power. The power transformer is one of the important power transmission and transformation equipment in the power system. It connects multiple voltage levels and plays a pivotal role in the power grid. The safety and reliability of its operation directly affects the operation safety of the power grid, and improving the operation reliability of power transformers is of great significance to the safe and reliable operation of the entire power grid. At present, many transformers in my coun...

Claims

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Application Information

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IPC IPC(8): G01R31/06G01B7/16
CPCG01B7/16G01R31/72Y04S10/52
Inventor 李学斌隋玉秋黄旭赵义松于在明徐建源罗彤李贤伟张彬曹辰周榆晓郭铁应勇牛李
Owner STATE GRID LIAONING ELECTRIC POWER RES INST
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