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A Fault Diagnosis Method for Iron Core Looseness of High Voltage Shunt Reactor

A technology of fault diagnosis and reactor, which is applied in the direction of instruments, measuring electronics, vibration testing, etc., can solve problems such as changes in measurement results, and achieve high accuracy and high repeatability of measurement

Active Publication Date: 2022-03-15
STATE GRID HEBEI ELECTRIC POWER RES INST +2
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a reactor core loose fault diagnosis method based on the contrast of the vibration texture of the reactor fuel tank, which avoids the disadvantage of the traditional vibration method that the measurement results change with the position of the measurement point, and can realize online detection at the same time

Method used

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  • A Fault Diagnosis Method for Iron Core Looseness of High Voltage Shunt Reactor
  • A Fault Diagnosis Method for Iron Core Looseness of High Voltage Shunt Reactor
  • A Fault Diagnosis Method for Iron Core Looseness of High Voltage Shunt Reactor

Examples

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Embodiment approach

[0081] 1. Divide the grid and determine the measuring point. In this example, the object is a specially customized 10kV three-phase oil-immersed shunt reactor. The grid is divided into a 9*8 planar rectangular grid, and the measuring point is the grid Grid intersection, such as figure 2 Shown:

[0082] 2. Determine the reference signal. In this example, the A-phase current signal measured by the Rogowski coil is used as the reference signal, and the phase of the 50Hz component in the current signal is used as the calibration phase;

[0083] 3. Measure the vibration signal of the measured point. In this example, the industrial grade piezoelectric acceleration sensor produced by PCB company is used as the measurement sensor;

[0084] 4. Obtain the vibration phase distribution, and the vibration amplitude distribution, and finally obtain the vibration distribution, respectively discuss the influence of voltage and core looseness on the vibration distribution:

[0085] The firs...

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Abstract

The invention relates to a method for diagnosing a loose iron core fault of a high-voltage shunt reactor, which evaluates the mechanical state of the reactor by measuring the vibration texture of the reactor, and establishes a quantitative evaluation method for the mechanical state of the high-voltage shunt reactor based on the gray entropy of the vibration texture. The invention has the advantages of high accuracy of diagnosis results, and the diagnosis accuracy is not affected by measuring point and voltage, and due to the adoption of a suitable measurement strategy, fewer sensors are used in the measurement process, and the measurement repeatability is high, which is suitable for on-site operation. maintenance personnel.

Description

technical field [0001] The invention belongs to a reactor iron core loose fault diagnosis method based on the reactor oil tank vibration texture entropy. Background technique [0002] The high-voltage shunt reactor is an important reactive power compensation device, which is of great significance to the safe and stable operation of the power system. Once the high-voltage shunt reactor fails, it will cause huge economic losses and casualties. For high-voltage shunt reactors, especially UHV shunt reactors, due to the high voltage level and large capacity, the equipment will be subjected to severe electrical stress, thermal stress and mechanical stress assessment during operation, and aging, looseness and even failure are unavoidable of. Loose iron core is a common fault form of high voltage shunt reactor. According to the reasons for the loosening of the iron core, the loosening of the iron core can be divided into three types, loosening under the action of mechanical force...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M13/00G01M7/02G01R31/00
CPCG01M13/00G01M7/025G01R31/00
Inventor 孟令明高树国刘宏亮赵军孙路张克谦杜振斌张俊杰
Owner STATE GRID HEBEI ELECTRIC POWER RES INST