WO2023093660A1 - Transformer winding deformation degree evaluation device and method based on non-power cut detection - Google Patents

Transformer winding deformation degree evaluation device and method based on non-power cut detection Download PDF

Info

Publication number
WO2023093660A1
WO2023093660A1 PCT/CN2022/133136 CN2022133136W WO2023093660A1 WO 2023093660 A1 WO2023093660 A1 WO 2023093660A1 CN 2022133136 W CN2022133136 W CN 2022133136W WO 2023093660 A1 WO2023093660 A1 WO 2023093660A1
Authority
WO
WIPO (PCT)
Prior art keywords
phase
detection coil
winding
transformer
signal
Prior art date
Application number
PCT/CN2022/133136
Other languages
French (fr)
Chinese (zh)
Inventor
俞华
李劲松
董理科
陈青松
刘宏
李国栋
李帅
杨虹
刘杨
毕建刚
常文治
胡帆
王强
赵金
刘建华
邢秀峰
梁基重
芦竹茂
原辉
王帅
程胤璋
Original Assignee
国网山西省电力公司电力科学研究院
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 国网山西省电力公司电力科学研究院 filed Critical 国网山西省电力公司电力科学研究院
Priority to JP2023516799A priority Critical patent/JP7461568B2/en
Publication of WO2023093660A1 publication Critical patent/WO2023093660A1/en

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
    • G01R31/62—Testing of transformers

Definitions

  • the invention belongs to the technical field of power equipment quality detection, and in particular relates to a transformer winding deformation evaluation device and method based on non-stop detection.
  • Winding deformation is a common problem in transformer operation. Under normal circumstances, a transformer with deformed windings will continue to operate for a period of time, but if it cannot be properly repaired, the cumulative effect caused by the deformation of the windings will further develop, eventually leading to damage to the transformer and affecting the reliability of power supply.
  • the traditional transformer winding deformation detection mainly relies on frequency response detection of power failure, short-circuit impedance and other methods. The biggest problems of these methods are: first, the power failure of the transformer is required, which affects the reliability of power supply; second, these detection methods have their own shortcomings.
  • the frequency response detection is too sensitive, and the detection results of short-circuit impedance detection are subject to large interference factors under small current detection, which is prone to large deviations, which seriously affects the evaluation and diagnosis of transformer winding deformation. Once the degree of transformer winding deformation cannot be misjudged, it may aggravate the damage of the transformer and even cause a large-scale power outage.
  • the patent technology CN202011528297.0 in the prior art discloses a method and device for on-line monitoring of power transformer winding deformation. , real-time feedback of winding deformation.
  • the patent has a single monitoring signal, which cannot overcome the detection error caused by the disturbance of the external and internal components of the transformer winding, and the accuracy is not high.
  • the present invention overcomes the deficiencies in the prior art, and provides a transformer winding deformation evaluation device and method based on non-stop detection.
  • the degree of deformation provides a decision-making basis for transformer maintenance and avoids the expansion of transformer faults.
  • the invention is of great significance for preventing transformer damage and improving operational reliability.
  • a transformer winding deformation evaluation device based on non-stop detection including: a vibration sensor, a capacitive current sampling box, a signal processing unit, an upper detection coil and a lower detection coil, and the six capacitive current sampling boxes are respectively arranged on the medium voltage sleeve of the transformer
  • the vibration sensor is set at the center of the transformer oil tank, and there are multiple transformers inside the transformer.
  • Transformer windings are A-phase transformer windings, B-phase transformer windings, and C-phase transformer windings.
  • the transformer windings include: core main column, upper iron yoke, lower iron yoke, low-voltage winding, medium-voltage winding and high-voltage winding.
  • the low-voltage winding, medium-voltage winding and high-voltage winding are sequentially sleeved on the main column of the iron core from the inside to the outside.
  • the upper detection coil is set on the The lower end of the upper iron yoke, and the upper detection coil is located directly above between the medium voltage winding and the low voltage winding, the lower detection coil is arranged at the upper end of the lower iron yoke, and the lower detection coil is located at the
  • the capacitive current sampling box, the vibration sensor, the upper detection coil, and the lower detection coil are all connected to the signal processing unit directly below the low-voltage winding and the main column of the iron core.
  • both the upper detection coil and the lower detection coil have a circular structure
  • the value of the diameter of the upper detection coil is the difference between the radius of the medium-voltage winding and the radius of the low-voltage winding
  • the value of the diameter of the lower detection coil is The difference between the radius of the low-voltage winding and the radius of the main column of the iron core.
  • both the upper detection coil and the lower detection coil are connected to the signal processing unit through the detection coil signal line, and the outside of the detection coil signal line is provided with insulating cardboard and a ferromagnetic shielding sheet, that is, the detection coil There are insulating cardboard and ferromagnetic shielding sheets between the signal line and the transformer shell, the upper iron yoke or the lower iron yoke, which play a shielding effect on the detection coil signal line and overcome the complex leakage magnetic field of the transformer. Signal line interference.
  • the detection coil signal line includes: a detection coil signal line A and a detection coil signal line B, the detection coil signal line A and the detection coil signal line B cooperate to realize the signal transmission of a detection coil, and the ferromagnetic shielding sheet A magnetic circuit dividing line is provided, and the ferromagnetic shielding sheet is divided into a ferromagnetic shielding sheet A and a ferromagnetic shielding sheet B by the magnetic circuit dividing line, and one end of the ferromagnetic shielding sheet A and the ferromagnetic shielding sheet B is connected, so
  • the ferromagnetic shielding sheet A corresponds to the position of the detection coil signal line A
  • the ferromagnetic shielding sheet B corresponds to the position of the detection coil signal line B
  • the magnetic circuit dividing line is set on the ferromagnetic shielding sheet
  • the method for evaluating the degree of transformer winding deformation based on non-stop detection using the above-mentioned device includes the following steps:
  • Winding deformation signal monitoring by extracting the monitoring signal of the vibration sensor for analysis and identification, the effective value of each harmonic component and the peak value of the characteristic frequency of the voltage signal are extracted; through six capacitive current sampling boxes, the medium voltage bushing phase A, The capacitive current of phase B and phase C and the capacitive current of phase A, phase B and phase C of the low-voltage bushing; through the upper detection coil and the lower detection coil, respectively monitor the change of the magnetic flux leakage signal caused by the deformation of the winding;
  • Relative capacitance ratio monitoring real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the medium voltage bushing, and obtaining the corresponding capacitance currents I 12A , I 12B of phase A, phase B, and phase C of the medium voltage bushing respectively , I 12C , whose initial currents are I 02A , I 02B , and I 02C ; real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the low-voltage bushing to obtain phase A, phase B, and phase C of the low-voltage bushing
  • the corresponding capacitive currents I 11A , I 11B , and I 11C respectively, and their initial currents are I 01A , I 01B , and I 01C ;
  • Flux leakage signal monitoring U b1A , U b1B , and U b1C are obtained from the upper detection coils respectively arranged at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding, respectively representing the upper parts of A-phase, B-phase, and C-phase
  • the strength of the leakage magnetic field signal is obtained from the lower detection coils at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding respectively to obtain U b2A , U b2B , and U b2C , which represent the phase A, phase B, and phase C respectively.
  • the intensity of the leakage magnetic field signal at the lower part
  • the transformer winding has general deformation
  • the present invention has the following beneficial effects.
  • the invention solves the problems of inaccurate transformer winding deformation monitoring and low reliability caused by traditional monitoring technology, and evaluates the degree of transformer winding deformation in real time through non-stop detection, which is conducive to timely discovery of latent deformation of transformer windings and timely formulation of transformer maintenance.
  • the strategy ensures the safe and reliable operation of the transformer, which is of great significance to ensure the reliability of the grid power supply.
  • Fig. 1 is a structural schematic diagram of the present invention.
  • Fig. 2 is a schematic diagram of the detection coil of the present invention.
  • Fig. 3 is a schematic diagram of the ferromagnetic shielding sheet of the present invention.
  • 1 is the fuel tank
  • 2 is the vibration sensor
  • 3 is the capacitive current sampling box
  • 4 is the signal processing unit
  • 5 is the upper detection coil
  • 6 is the lower detection coil
  • 7 is the medium voltage bushing
  • 8 is the low voltage bushing
  • 9 is the main column of the iron core
  • 10 is the upper iron yoke
  • 11 is the lower iron yoke
  • 12 is the low-voltage winding
  • 13 is the medium-voltage winding
  • 14 is the high-voltage winding
  • 15 is the detection coil signal line
  • 16 is insulating cardboard
  • 17 is the detection coil Signal line A
  • 18 is the detection coil signal line B
  • 19 is the magnetic circuit dividing line
  • 20 is the ferromagnetic shielding sheet A
  • 21 is the ferromagnetic shielding sheet B.
  • the transformer winding deformation evaluation device based on non-stop detection includes: vibration sensor 2, capacitive current sampling box 3, signal processing unit 4, upper detection coil 5 and lower detection coil 6, the six described
  • the capacitive current sampling boxes 3 are respectively arranged at the end screens of the A phase, B phase, and C phase of the medium voltage bushing 7 and the A phase, B phase, and C phase end screens of the low voltage bushing 8 of the transformer.
  • the sensor 2 is set at the center of the oil tank 1 of the transformer.
  • Figure 1 is an oil-immersed transformer, and its oil tank is the shell of the transformer.
  • each of the transformer windings includes: core main column 9, upper iron yoke 10, lower iron yoke 11, low voltage winding 12, medium voltage winding 13 and high voltage winding 14, the low voltage winding 12 , the medium-voltage winding 13 and the high-voltage winding 14 are sequentially sleeved on the main column 9 of the iron core from the inside to the outside, the upper detection coil 5 is arranged at the lower end of the upper iron yoke 10, and the upper detection coil 5 is located at Directly above between the medium voltage winding 13 and the low voltage winding 12, the lower detection coil 6 is arranged on the upper end of the lower iron yoke 11, and the lower detection coil 6 is located between the low voltage winding 12 and the iron core Right below the main columns 9 , the capacitive current sampling box 3 , the vibration sensor 2 , the upper detection coil 5 , and
  • Both the upper detection coil 5 and the lower detection coil 6 have a circular structure, the value of the diameter of the upper detection coil 5 is the difference between the radius of the medium voltage winding 13 and the radius of the low voltage winding 12, and the diameter of the lower detection coil 6 is The value of is the difference between the radius of the low-voltage winding 12 and the radius of the main post 9 of the iron core.
  • Both the upper detection coil 5 and the lower detection coil 6 are connected to the signal processing unit 4 through the detection coil signal line 15, and the outside of the detection coil signal line 15 is provided with an insulating cardboard 16 and a ferromagnetic shielding sheet, that is, the There are insulating cardboards and ferromagnetic shielding sheets between the signal wires of the detection coil and the transformer shell, the upper iron yoke or the lower iron yoke.
  • the detection coil signal line 15 includes: a detection coil signal line A17 and a detection coil signal line B18, and the detection coil signal line A17 and the detection coil signal line B18 cooperate to realize signal transmission of a detection coil, and the ferromagnetic
  • the shielding sheet is provided with a magnetic circuit dividing line 19, and the ferromagnetic shielding sheet is divided into a ferromagnetic shielding sheet A20 and a ferromagnetic shielding sheet B21 by the magnetic circuit dividing line 19, and the ferromagnetic shielding sheet A20 and the ferromagnetic shielding sheet B21 One end is connected, the ferromagnetic shielding sheet A20 corresponds to the position of the detection coil signal line A17, and the ferromagnetic shielding sheet B21 corresponds to the position of the detection coil signal line B18.
  • the evaluation method of transformer winding deformation degree based on non-stop detection includes the following steps:
  • Winding deformation signal monitoring by extracting the monitoring signal of the vibration sensor for analysis and identification, the effective value of each harmonic component and the peak value of the characteristic frequency of the voltage signal are extracted; through six capacitive current sampling boxes, the medium voltage bushing phase A, The capacitive current of phase B and phase C and the capacitive current of phase A, phase B and phase C of the low-voltage bushing; through the upper detection coil and the lower detection coil, respectively monitor the change of the magnetic flux leakage signal caused by the deformation of the winding;
  • Relative capacitance ratio monitoring real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the medium voltage bushing, and obtaining the corresponding capacitance currents I 12A , I 12B of phase A, phase B, and phase C of the medium voltage bushing respectively , I 12C , whose initial currents are I 02A , I 02B , and I 02C ; real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the low-voltage bushing to obtain phase A, phase B, and phase C of the low-voltage bushing
  • the corresponding capacitive currents I 11A , I 11B , and I 11C respectively, and their initial currents are I 01A , I 01B , and I 01C ;
  • Flux leakage signal monitoring U b1A , U b1B , and U b1C are obtained from the upper detection coils respectively arranged at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding, respectively representing the upper parts of A-phase, B-phase, and C-phase
  • the strength of the leakage magnetic field signal is obtained from the lower detection coils at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding respectively to obtain U b2A , U b2B , and U b2C , which represent the phase A, phase B, and phase C respectively.
  • the intensity of the leakage magnetic field signal at the lower part
  • the transformer winding has general deformation

Abstract

A transformer winding deformation degree evaluation device and method based on non-power cut detection. The evaluation device comprises: a vibration sensor (2), capacitance current sampling boxes (3), a signal processing unit (4), upper detection coils (5) and lower detection coils (6). The vibration sensor (2) is provided at the center of a transformer oil tank (1), a plurality of transformer windings are provided in a transformer, the upper detection coils (5) are provided at the lower end of an upper iron yoke (10), and the lower detection coils (6) are provided at the upper end of a lower iron yoke (11). The capacitance current sampling boxes (3), the vibration sensor (2), the upper detection coils (5) and the lower detection coils (6) are all connected to the signal processing unit (4). The evaluation method comprises the following steps: winding deformation signal monitoring, winding deformation signal extraction analysis, and winding deformation degree evaluation.

Description

基于不停电检测的变压器绕组变形程度评估装置及方法Device and method for evaluating transformer winding deformation degree based on non-stop detection 技术领域technical field
本发明属于电力设备质量检测技术领域，具体涉及基于不停电检测的变压器绕组变形程度评估装置及方法。The invention belongs to the technical field of power equipment quality detection, and in particular relates to a transformer winding deformation evaluation device and method based on non-stop detection.
背景技术Background technique
绕组变形是变压器运行中常见的问题。一般情况下，绕组发生了变形的变压器还会继续运行一段时间，但如果不能得到合适的修理，绕组因变形导致累积效应会进一步发展，最终导致变压器损坏，影响了供电可靠性。但是传统的变压器绕组变形检测主要是依赖于停电的频率响应检测、短路阻抗等方法，这些方法最大的问题：一是需要变压器停电，影响供电可靠性；二是这些检测方法本身存在各自的缺点，频率响应检测过于灵敏，短路阻抗检测在小电流检测下检测结果受干扰因素大，容易产生较大偏差，严重影响了变压器绕组变形程度的评估诊断。变压器绕组变形程度一旦无法误判，可能加剧变压器的损坏程度，甚至产生大面积停电事故。Winding deformation is a common problem in transformer operation. Under normal circumstances, a transformer with deformed windings will continue to operate for a period of time, but if it cannot be properly repaired, the cumulative effect caused by the deformation of the windings will further develop, eventually leading to damage to the transformer and affecting the reliability of power supply. However, the traditional transformer winding deformation detection mainly relies on frequency response detection of power failure, short-circuit impedance and other methods. The biggest problems of these methods are: first, the power failure of the transformer is required, which affects the reliability of power supply; second, these detection methods have their own shortcomings. The frequency response detection is too sensitive, and the detection results of short-circuit impedance detection are subject to large interference factors under small current detection, which is prone to large deviations, which seriously affects the evaluation and diagnosis of transformer winding deformation. Once the degree of transformer winding deformation cannot be misjudged, it may aggravate the damage of the transformer and even cause a large-scale power outage.
现有技术中主要针对变压器停电开展绕组变形的检测和评估，供电可靠性差，部分通过带电监测方法，这些方法大都存在方法单一、效率低、准确率不高等问题，且无法评估变压器实际带电运行状态下的变形程度，因此现有技术中无法解决实际变压器不停电检测准确评估绕组是否变形的问题。现有技术中与本发明接近的专利技术CN202011528297.0，本专利申请公开了一种电力变压器绕组变形在线监测方法及装置，该发明专利主要在变压器内部绕组设置光纤传感器，通过监测光参量的变化，实时反馈绕组形变程度。该专利监测信号单一，无法克服变压器绕组外部及内部组部件的扰动带来的检测误差，准确度不高。In the existing technology, the detection and evaluation of winding deformation is mainly carried out for transformer power outages. The reliability of power supply is poor, and some of them use live monitoring methods. Most of these methods have problems such as single method, low efficiency, and low accuracy, and they cannot evaluate the actual live running status of transformers. Therefore, in the prior art, it is impossible to solve the problem of accurately evaluating whether the winding is deformed by detecting the actual transformer without power failure. The patent technology CN202011528297.0 in the prior art that is close to the present invention discloses a method and device for on-line monitoring of power transformer winding deformation. , real-time feedback of winding deformation. The patent has a single monitoring signal, which cannot overcome the detection error caused by the disturbance of the external and internal components of the transformer winding, and the accuracy is not high.
发明内容Contents of the invention
本发明克服了现有技术存在的不足，提供了一种基于不停电检测的变压器绕组变形程度评估装置及方法，在变压器绕组发生变形后，在不停电的情况下通过实时监测，及时提出变压器绕组的变形程度，为变压器检修提供了决策依据，避免了变压器故障扩大，本发明对防止了变压器的损坏、提高了运行可靠性具有重要意义。The present invention overcomes the deficiencies in the prior art, and provides a transformer winding deformation evaluation device and method based on non-stop detection. The degree of deformation provides a decision-making basis for transformer maintenance and avoids the expansion of transformer faults. The invention is of great significance for preventing transformer damage and improving operational reliability.
为了解决上述技术问题，本发明采用的技术方案为：In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:
基于不停电检测的变压器绕组变形程度评估装置，包括：振动传感器、电容电流取样盒、信号处理单元、上部探测线圈和下部探测线圈，六个所述电容电流取样盒分别设置于变压器 的中压套管的A相、B相、C相的末屏处和低压套管的A相、B相、C相的末屏处，所述振动传感器设置于变压器油箱的中心位置，变压器内部设有多个变压器绕组，分别为A相变压器绕组、B相变压器绕组、C相变压器绕组，所述变压器绕组包括：铁心主柱、上铁轭、下铁轭、低压绕组、中压绕组和高压绕组，所述低压绕组、中压绕组和高压绕组从里向外依次套设于所述铁心主柱上，此变压器结构为现有成熟技术，故在此不做详述，所述上部探测线圈设置于所述上铁轭的下端，且所述上部探测线圈位于所述中压绕组与低压绕组之间的正上方，所述下部探测线圈设置于所述下铁轭的上端，且所述下部探测线圈位于所述低压绕组与所述铁心主柱之间的正下方，所述电容电流取样盒、振动传感器、上部探测线圈、下部探测线圈均与所述信号处理单元相连接。A transformer winding deformation evaluation device based on non-stop detection, including: a vibration sensor, a capacitive current sampling box, a signal processing unit, an upper detection coil and a lower detection coil, and the six capacitive current sampling boxes are respectively arranged on the medium voltage sleeve of the transformer At the end screens of A, B, and C phases of the tube and at the end screens of A, B, and C phases of the low-voltage bushing, the vibration sensor is set at the center of the transformer oil tank, and there are multiple transformers inside the transformer. Transformer windings are A-phase transformer windings, B-phase transformer windings, and C-phase transformer windings. The transformer windings include: core main column, upper iron yoke, lower iron yoke, low-voltage winding, medium-voltage winding and high-voltage winding. The low-voltage winding, medium-voltage winding and high-voltage winding are sequentially sleeved on the main column of the iron core from the inside to the outside. This transformer structure is an existing mature technology, so it will not be described in detail here. The upper detection coil is set on the The lower end of the upper iron yoke, and the upper detection coil is located directly above between the medium voltage winding and the low voltage winding, the lower detection coil is arranged at the upper end of the lower iron yoke, and the lower detection coil is located at the The capacitive current sampling box, the vibration sensor, the upper detection coil, and the lower detection coil are all connected to the signal processing unit directly below the low-voltage winding and the main column of the iron core.
进一步的，所述上部探测线圈和下部探测线圈均为圆形结构，所述上部探测线圈的直径的值为中压绕组半径与低压绕组半径的差值，所述下部探测线圈的直径的值为低压绕组半径与铁心主柱半径的差值，当变压器绕组发生变形后，中压绕组与低压绕组的相对位置发生变化，低压绕组与对应铁心主柱的相对位置发生变化，位置变化导致漏磁场的变化，通过上部探测线圈与下部探测线圈的设置，共同研判变压器绕组变形程度，提高了绕组变形的监测准确性。Further, both the upper detection coil and the lower detection coil have a circular structure, the value of the diameter of the upper detection coil is the difference between the radius of the medium-voltage winding and the radius of the low-voltage winding, and the value of the diameter of the lower detection coil is The difference between the radius of the low-voltage winding and the radius of the main column of the iron core. When the transformer winding is deformed, the relative position of the medium-voltage winding and the low-voltage winding changes, and the relative position of the low-voltage winding and the corresponding main column of the iron core changes. The position change leads to the leakage field Changes, through the setting of the upper detection coil and the lower detection coil, the deformation degree of the transformer winding is jointly studied and judged, and the monitoring accuracy of the winding deformation is improved.
进一步的，所述上部探测线圈和下部探测线圈均通过探测线圈信号线与所述信号处理单元相连接，所述探测线圈信号线的外部设置有绝缘纸板和铁磁屏蔽片，即所述探测线圈信号线与变压器壳体、上铁轭或下铁轭接触的之间均间隔有绝缘纸板和铁磁屏蔽片，起到了对探测线圈信号线的屏蔽效果，克服了变压器的复杂漏磁场对探测线圈信号线的干扰。Further, both the upper detection coil and the lower detection coil are connected to the signal processing unit through the detection coil signal line, and the outside of the detection coil signal line is provided with insulating cardboard and a ferromagnetic shielding sheet, that is, the detection coil There are insulating cardboard and ferromagnetic shielding sheets between the signal line and the transformer shell, the upper iron yoke or the lower iron yoke, which play a shielding effect on the detection coil signal line and overcome the complex leakage magnetic field of the transformer. Signal line interference.
进一步的，所述探测线圈信号线包括：探测线圈信号线A和探测线圈信号线B，探测线圈信号线A和探测线圈信号线B相配合实现一个探测线圈的信号传输，所述铁磁屏蔽片上设置有磁路分割线，所述铁磁屏蔽片由磁路分割线分为铁磁屏蔽片A和铁磁屏蔽片B，所述铁磁屏蔽片A和铁磁屏蔽片B的一端相连，所述铁磁屏蔽片A与所述探测线圈信号线A的位置相对应，所述铁磁屏蔽片B与所述探测线圈信号线B的位置相对应，在铁磁屏蔽片上设置磁路分割线，目的是切割由于内部磁场在铁磁屏蔽片上产生的涡流，大幅降低了因涡流而产生的损耗。Further, the detection coil signal line includes: a detection coil signal line A and a detection coil signal line B, the detection coil signal line A and the detection coil signal line B cooperate to realize the signal transmission of a detection coil, and the ferromagnetic shielding sheet A magnetic circuit dividing line is provided, and the ferromagnetic shielding sheet is divided into a ferromagnetic shielding sheet A and a ferromagnetic shielding sheet B by the magnetic circuit dividing line, and one end of the ferromagnetic shielding sheet A and the ferromagnetic shielding sheet B is connected, so The ferromagnetic shielding sheet A corresponds to the position of the detection coil signal line A, the ferromagnetic shielding sheet B corresponds to the position of the detection coil signal line B, and the magnetic circuit dividing line is set on the ferromagnetic shielding sheet, The purpose is to cut the eddy current generated on the ferromagnetic shield due to the internal magnetic field, and greatly reduce the loss caused by the eddy current.
采用上述装置的基于不停电检测的变压器绕组变形程度评估方法，包括以下步骤：The method for evaluating the degree of transformer winding deformation based on non-stop detection using the above-mentioned device includes the following steps:
S1、绕组变形信号监测；通过提取振动传感器的监测信号进行分析识别，提取电压信号的各次谐波分量有效值和特征频率峰值；通过六个电容电流取样盒分别得到中压套管A相、 B相、C相的电容电流和低压套管A相、B相、C相的电容电流；通过上部探测线圈和下部探测线圈，分别监测由于绕组形变造成漏磁信号变化；S1. Winding deformation signal monitoring; by extracting the monitoring signal of the vibration sensor for analysis and identification, the effective value of each harmonic component and the peak value of the characteristic frequency of the voltage signal are extracted; through six capacitive current sampling boxes, the medium voltage bushing phase A, The capacitive current of phase B and phase C and the capacitive current of phase A, phase B and phase C of the low-voltage bushing; through the upper detection coil and the lower detection coil, respectively monitor the change of the magnetic flux leakage signal caused by the deformation of the winding;
S2、绕组变形信号提取分析；S2, winding deformation signal extraction and analysis;
振动传感器监测信号分析，得到同一时刻下各谐波分量的电压信号有效值U i，U i均为50HZ的倍频信号，通过信号特征提取： Vibration sensor monitoring signal analysis, the effective value U i of the voltage signal of each harmonic component at the same time is obtained, and U i is a 50HZ double frequency signal, through signal feature extraction:
总谐波畸变率
Figure PCTCN2022133136-appb-000001
THD
Figure PCTCN2022133136-appb-000001
相对电容比监测，实时提取中压套管A相、B相、C相的电容电流取样盒中数据，得到中压套管A相、B相、C相分别对应的电容电流I 12A、I 12B、I 12C，其初始电流分别为I 02A、I 02B、I 02C；实时提取低压套管A相、B相、C相的电容电流取样盒中数据，得到低压套管A相、B相、C相分别对应的电容电流I 11A、I 11B、I 11C，其初始电流分别为I 01A、I 01B、I 01C； Relative capacitance ratio monitoring, real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the medium voltage bushing, and obtaining the corresponding capacitance currents I 12A , I 12B of phase A, phase B, and phase C of the medium voltage bushing respectively , I 12C , whose initial currents are I 02A , I 02B , and I 02C ; real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the low-voltage bushing to obtain phase A, phase B, and phase C of the low-voltage bushing The corresponding capacitive currents I 11A , I 11B , and I 11C respectively, and their initial currents are I 01A , I 01B , and I 01C ;
漏磁信号监测，由分别设置于A相变压器绕组、B相变压器绕组、C相变压器绕组处的上部探测线圈得到U b1A、U b1B、U b1C，分别表征A相、B相、C相的上部漏磁场信号的强弱，分别设置于A相变压器绕组、B相变压器绕组、C相变压器绕组处的下部探测线圈得到U b2A、U b2B、U b2C，分别表征A相、B相、C相的下部漏磁场信号的强弱； Flux leakage signal monitoring: U b1A , U b1B , and U b1C are obtained from the upper detection coils respectively arranged at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding, respectively representing the upper parts of A-phase, B-phase, and C-phase The strength of the leakage magnetic field signal is obtained from the lower detection coils at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding respectively to obtain U b2A , U b2B , and U b2C , which represent the phase A, phase B, and phase C respectively. The intensity of the leakage magnetic field signal at the lower part;
S3、绕组变形程度评估；S3. Evaluation of winding deformation degree;
振动监测特征量Z：Vibration monitoring characteristic quantity Z:
如果THD>5且U i中的最大值对应的谐波频率≥1000HZ，Z＝2，否则Z＝1，此处U i中的最大值即为U i，i∈(1,2,3……n)中的最大值； If THD>5 and the harmonic frequency corresponding to the maximum value in U i is ≥1000HZ, Z=2, otherwise Z=1, where the maximum value in U i is U i , i∈(1,2,3... ...n) the maximum value;
相对电容电流比特征量C i： Relative capacitance-current ratio characteristic quantity C i :
取
Figure PCTCN2022133136-appb-000002
三者中的最大值为MAX c， Pick
Figure PCTCN2022133136-appb-000002
The maximum of the three is MAX c ,
若1.1≤MAX c≤1.3，则C i＝2，若MAX c＞1.3，则C i＝3，否则C i＝1； If 1.1≤MAX c ≤1.3, then C i =2, if MAX c >1.3, then C i =3, otherwise C i =1;
漏磁信号监测特征量U b： Magnetic flux leakage signal monitoring characteristic quantity U b :
取
Figure PCTCN2022133136-appb-000003
三者中的最大值为MAX u， Pick
Figure PCTCN2022133136-appb-000003
The largest of the three is MAX u ,
若1.2≤MAX u＜1.4，则U b＝2，若MAX u≥1.4，则U b＝4，否则U b＝1； If 1.2≤MAX u <1.4, then U b =2, if MAX u ≥1.4, then U b =4, otherwise U b =1;
得到变压器绕组变形程度综合评估：A comprehensive evaluation of the deformation degree of the transformer winding is obtained:
Figure PCTCN2022133136-appb-000004
Figure PCTCN2022133136-appb-000004
若B≤5，变压器绕组没有变形；If B≤5, the transformer winding is not deformed;
若5<B≤20，变压器绕组存在轻微变形；If 5<B≤20, the transformer winding is slightly deformed;
若20<B≤40，变压器绕组存在一般变形；If 20<B≤40, the transformer winding has general deformation;
若40<B，变压器绕组存在严重变形。If 40<B, the transformer winding is seriously deformed.
本发明与现有技术相比具有以下有益效果。Compared with the prior art, the present invention has the following beneficial effects.
本发明解决了传统监测技术带来的变压器绕组变形监测不准确、可靠性低等问题，通过不停电检测实时评估变压器的绕组变形程度，有利于及时发现变压器绕组潜伏性的变形，及时制定变压器检修策略，保证了变压器的安全可靠运行，对保证电网供电可靠性具有重要意义。The invention solves the problems of inaccurate transformer winding deformation monitoring and low reliability caused by traditional monitoring technology, and evaluates the degree of transformer winding deformation in real time through non-stop detection, which is conducive to timely discovery of latent deformation of transformer windings and timely formulation of transformer maintenance. The strategy ensures the safe and reliable operation of the transformer, which is of great significance to ensure the reliability of the grid power supply.
附图说明Description of drawings
下面结合附图对本发明做进一步的说明。The present invention will be further described below in conjunction with the accompanying drawings.
图1为本发明的结构示意图。Fig. 1 is a structural schematic diagram of the present invention.
图2为本发明探测线圈的示意图。Fig. 2 is a schematic diagram of the detection coil of the present invention.
图3为本发明铁磁屏蔽片的示意图。Fig. 3 is a schematic diagram of the ferromagnetic shielding sheet of the present invention.
图中：1为油箱，2为振动传感器，3为电容电流取样盒，4为信号处理单元，5为上部探测线圈，6为下部探测线圈，7为中压套管，8为低压套管，9为铁心主柱，10为上铁轭，11为下铁轭，12为低压绕组，13为中压绕组，14为高压绕组，15为探测线圈信号线，16为绝缘纸板，17为探测线圈信号线A，18为探测线圈信号线B，19为磁路分割线，20为铁磁屏蔽片A，21为铁磁屏蔽片B。In the figure: 1 is the fuel tank, 2 is the vibration sensor, 3 is the capacitive current sampling box, 4 is the signal processing unit, 5 is the upper detection coil, 6 is the lower detection coil, 7 is the medium voltage bushing, 8 is the low voltage bushing, 9 is the main column of the iron core, 10 is the upper iron yoke, 11 is the lower iron yoke, 12 is the low-voltage winding, 13 is the medium-voltage winding, 14 is the high-voltage winding, 15 is the detection coil signal line, 16 is insulating cardboard, and 17 is the detection coil Signal line A, 18 is the detection coil signal line B, 19 is the magnetic circuit dividing line, 20 is the ferromagnetic shielding sheet A, and 21 is the ferromagnetic shielding sheet B.
具体实施方式Detailed ways
以下结合具体实施例对本发明作进一步说明。The present invention will be further described below in conjunction with specific examples.
如图1，图2，基于不停电检测的变压器绕组变形程度评估装置，包括：振动传感器2、 电容电流取样盒3、信号处理单元4、上部探测线圈5和下部探测线圈6，六个所述电容电流取样盒3分别设置于变压器的中压套管7的A相、B相、C相的末屏处和低压套管8的A相、B相、C相的末屏处，所述振动传感器2设置于变压器的油箱1的中心位置，图1为油浸式变压器，其油箱即为变压器的外壳，如图2，变压器内部设有,3个变压器绕组，分别为A相变压器绕组、B相变压器绕组、C相变压器绕组，每个所述变压器绕组包括：铁心主柱9、上铁轭10、下铁轭11、低压绕组12、中压绕组13和高压绕组14，所述低压绕组12、中压绕组13和高压绕组14从里向外依次套设于所述铁心主柱9上，所述上部探测线圈5设置于所述上铁轭10的下端，且所述上部探测线圈5位于所述中压绕组13与低压绕组12之间的正上方，所述下部探测线圈6设置于所述下铁轭11的上端，且所述下部探测线圈6位于所述低压绕组12与所述铁心主柱9之间的正下方，所述电容电流取样盒3、振动传感器2、上部探测线圈5、下部探测线圈6均与所述信号处理单元4相连接。As shown in Figure 1 and Figure 2, the transformer winding deformation evaluation device based on non-stop detection includes: vibration sensor 2, capacitive current sampling box 3, signal processing unit 4, upper detection coil 5 and lower detection coil 6, the six described The capacitive current sampling boxes 3 are respectively arranged at the end screens of the A phase, B phase, and C phase of the medium voltage bushing 7 and the A phase, B phase, and C phase end screens of the low voltage bushing 8 of the transformer. The sensor 2 is set at the center of the oil tank 1 of the transformer. Figure 1 is an oil-immersed transformer, and its oil tank is the shell of the transformer. As shown in Figure 2, there are three transformer windings inside the transformer, which are A-phase transformer windings and B-phase Phase transformer windings, C-phase transformer windings, each of the transformer windings includes: core main column 9, upper iron yoke 10, lower iron yoke 11, low voltage winding 12, medium voltage winding 13 and high voltage winding 14, the low voltage winding 12 , the medium-voltage winding 13 and the high-voltage winding 14 are sequentially sleeved on the main column 9 of the iron core from the inside to the outside, the upper detection coil 5 is arranged at the lower end of the upper iron yoke 10, and the upper detection coil 5 is located at Directly above between the medium voltage winding 13 and the low voltage winding 12, the lower detection coil 6 is arranged on the upper end of the lower iron yoke 11, and the lower detection coil 6 is located between the low voltage winding 12 and the iron core Right below the main columns 9 , the capacitive current sampling box 3 , the vibration sensor 2 , the upper detection coil 5 , and the lower detection coil 6 are all connected to the signal processing unit 4 .
所述上部探测线圈5和下部探测线圈6均为圆形结构，所述上部探测线圈5的直径的值为中压绕组13半径与低压绕组12半径的差值，所述下部探测线圈6的直径的值为低压绕组12半径与铁心主柱9半径的差值。Both the upper detection coil 5 and the lower detection coil 6 have a circular structure, the value of the diameter of the upper detection coil 5 is the difference between the radius of the medium voltage winding 13 and the radius of the low voltage winding 12, and the diameter of the lower detection coil 6 is The value of is the difference between the radius of the low-voltage winding 12 and the radius of the main post 9 of the iron core.
所述上部探测线圈5和下部探测线圈6均通过探测线圈信号线15与所述信号处理单元4相连接，所述探测线圈信号线15的外部设置有绝缘纸板16和铁磁屏蔽片，即所述探测线圈信号线与变压器壳体、上铁轭或下铁轭接触的之间均间隔有绝缘纸板和铁磁屏蔽片。Both the upper detection coil 5 and the lower detection coil 6 are connected to the signal processing unit 4 through the detection coil signal line 15, and the outside of the detection coil signal line 15 is provided with an insulating cardboard 16 and a ferromagnetic shielding sheet, that is, the There are insulating cardboards and ferromagnetic shielding sheets between the signal wires of the detection coil and the transformer shell, the upper iron yoke or the lower iron yoke.
如图3，所述探测线圈信号线15包括：探测线圈信号线A17和探测线圈信号线B18，探测线圈信号线A17和探测线圈信号线B18相配合实现一个探测线圈的信号传输，所述铁磁屏蔽片上设置有磁路分割线19，所述铁磁屏蔽片由磁路分割线19分为铁磁屏蔽片A20和铁磁屏蔽片B21，所述铁磁屏蔽片A20和铁磁屏蔽片B21的一端相连，所述铁磁屏蔽片A20与所述探测线圈信号线A17的位置相对应，所述铁磁屏蔽片B21与所述探测线圈信号线B18的位置相对应。As shown in Fig. 3, the detection coil signal line 15 includes: a detection coil signal line A17 and a detection coil signal line B18, and the detection coil signal line A17 and the detection coil signal line B18 cooperate to realize signal transmission of a detection coil, and the ferromagnetic The shielding sheet is provided with a magnetic circuit dividing line 19, and the ferromagnetic shielding sheet is divided into a ferromagnetic shielding sheet A20 and a ferromagnetic shielding sheet B21 by the magnetic circuit dividing line 19, and the ferromagnetic shielding sheet A20 and the ferromagnetic shielding sheet B21 One end is connected, the ferromagnetic shielding sheet A20 corresponds to the position of the detection coil signal line A17, and the ferromagnetic shielding sheet B21 corresponds to the position of the detection coil signal line B18.
基于不停电检测的变压器绕组变形程度评估方法，包括以下步骤：The evaluation method of transformer winding deformation degree based on non-stop detection includes the following steps:
S1、绕组变形信号监测；通过提取振动传感器的监测信号进行分析识别，提取电压信号的各次谐波分量有效值和特征频率峰值；通过六个电容电流取样盒分别得到中压套管A相、B相、C相的电容电流和低压套管A相、B相、C相的电容电流；通过上部探测线圈和下部探测线圈，分别监测由于绕组形变造成漏磁信号变化；S1. Winding deformation signal monitoring; by extracting the monitoring signal of the vibration sensor for analysis and identification, the effective value of each harmonic component and the peak value of the characteristic frequency of the voltage signal are extracted; through six capacitive current sampling boxes, the medium voltage bushing phase A, The capacitive current of phase B and phase C and the capacitive current of phase A, phase B and phase C of the low-voltage bushing; through the upper detection coil and the lower detection coil, respectively monitor the change of the magnetic flux leakage signal caused by the deformation of the winding;
S2、绕组变形信号提取分析；S2, winding deformation signal extraction and analysis;
振动传感器监测信号分析，得到同一时刻下各谐波分量的电压信号有效值U i，U i均为50HZ的倍频信号，通过信号特征提取： Vibration sensor monitoring signal analysis, the effective value U i of the voltage signal of each harmonic component at the same time is obtained, and U i is a 50HZ double frequency signal, through signal feature extraction:
总谐波畸变率
Figure PCTCN2022133136-appb-000005
THD
Figure PCTCN2022133136-appb-000005
相对电容比监测，实时提取中压套管A相、B相、C相的电容电流取样盒中数据，得到中压套管A相、B相、C相分别对应的电容电流I 12A、I 12B、I 12C，其初始电流分别为I 02A、I 02B、I 02C；实时提取低压套管A相、B相、C相的电容电流取样盒中数据，得到低压套管A相、B相、C相分别对应的电容电流I 11A、I 11B、I 11C，其初始电流分别为I 01A、I 01B、I 01C； Relative capacitance ratio monitoring, real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the medium voltage bushing, and obtaining the corresponding capacitance currents I 12A , I 12B of phase A, phase B, and phase C of the medium voltage bushing respectively , I 12C , whose initial currents are I 02A , I 02B , and I 02C ; real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the low-voltage bushing to obtain phase A, phase B, and phase C of the low-voltage bushing The corresponding capacitive currents I 11A , I 11B , and I 11C respectively, and their initial currents are I 01A , I 01B , and I 01C ;
漏磁信号监测，由分别设置于A相变压器绕组、B相变压器绕组、C相变压器绕组处的上部探测线圈得到U b1A、U b1B、U b1C，分别表征A相、B相、C相的上部漏磁场信号的强弱，分别设置于A相变压器绕组、B相变压器绕组、C相变压器绕组处的下部探测线圈得到U b2A、U b2B、U b2C，分别表征A相、B相、C相的下部漏磁场信号的强弱； Flux leakage signal monitoring: U b1A , U b1B , and U b1C are obtained from the upper detection coils respectively arranged at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding, respectively representing the upper parts of A-phase, B-phase, and C-phase The strength of the leakage magnetic field signal is obtained from the lower detection coils at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding respectively to obtain U b2A , U b2B , and U b2C , which represent the phase A, phase B, and phase C respectively. The intensity of the leakage magnetic field signal at the lower part;
S3、绕组变形程度评估；S3. Evaluation of winding deformation degree;
振动监测特征量Z：Vibration monitoring characteristic quantity Z:
如果THD>5且U i中的最大值对应的谐波频率≥1000HZ，Z＝2，否则Z＝1； If THD>5 and the harmonic frequency corresponding to the maximum value in U i is ≥1000HZ, Z=2, otherwise Z=1;
相对电容电流比特征量C i： Relative capacitance-current ratio characteristic quantity C i :
取
Figure PCTCN2022133136-appb-000006
三者中的最大值为MAX c， Pick
Figure PCTCN2022133136-appb-000006
The maximum of the three is MAX c ,
若1.1≤MAX c≤1.3，则C i＝2，若MAX c＞1.3，则C i＝3，否则C i＝1； If 1.1≤MAX c ≤1.3, then C i =2, if MAX c >1.3, then C i =3, otherwise C i =1;
漏磁信号监测特征量U b： Magnetic flux leakage signal monitoring characteristic quantity U b :
取
Figure PCTCN2022133136-appb-000007
三者中的最大值为MAX u， Pick
Figure PCTCN2022133136-appb-000007
The largest of the three is MAX u ,
若1.2≤MAX u＜1.4，则U b＝2，若MAX u≥1.4，则U b＝4，否则U b＝1； If 1.2≤MAX u <1.4, then U b =2, if MAX u ≥1.4, then U b =4, otherwise U b =1;
得到变压器绕组变形程度综合评估：A comprehensive evaluation of the deformation degree of the transformer winding is obtained:
Figure PCTCN2022133136-appb-000008
Figure PCTCN2022133136-appb-000008
若B≤5，变压器绕组没有变形；If B≤5, the transformer winding is not deformed;
若5<B≤20，变压器绕组存在轻微变形；If 5<B≤20, the transformer winding is slightly deformed;
若20<B≤40，变压器绕组存在一般变形；If 20<B≤40, the transformer winding has general deformation;
若40<B，变压器绕组存在严重变形。If 40<B, the transformer winding is seriously deformed.
上述实施方式仅示例性说明本发明的原理及其效果，而非用于限制本发明。对于熟悉此技术的人皆可在不违背本发明的精神及范畴下，对上述实施例进行修饰或改进。因此，凡举所述技术领域中具有通常知识者在未脱离本发明所揭示的精神与技术思想下所完成的一切等效修饰或改变，仍应由本发明的权利要求所涵盖。The above-mentioned embodiments only illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Those skilled in the art can modify or improve the above-mentioned embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by persons with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed in the present invention should still be covered by the claims of the present invention.

Claims (5)

  1. 基于不停电检测的变压器绕组变形程度评估装置，其特征在于，包括：振动传感器(2)、电容电流取样盒(3)、信号处理单元(4)、上部探测线圈(5)和下部探测线圈(6)，The transformer winding deformation evaluation device based on non-stop detection is characterized in that it includes: a vibration sensor (2), a capacitive current sampling box (3), a signal processing unit (4), an upper detection coil (5) and a lower detection coil ( 6),
    六个所述电容电流取样盒(3)分别设置于变压器的中压套管(7)的A相、B相、C相的末屏处和低压套管(8)的A相、B相、C相的末屏处，所述振动传感器(2)设置于变压器的油箱(1)的中心位置，变压器内部设有多个变压器绕组，所述变压器绕组包括：铁心主柱(9)、上铁轭(10)、下铁轭(11)、低压绕组(12)、中压绕组(13)和高压绕组(14)，所述低压绕组(12)、中压绕组(13)和高压绕组(14)从里向外依次套设于所述铁心主柱(9)上，所述上部探测线圈(5)设置于所述上铁轭(10)的下端，且所述上部探测线圈(5)位于所述中压绕组(13)与低压绕组(12)之间的正上方，所述下部探测线圈(6)设置于所述下铁轭(11)的上端，且所述下部探测线圈(6)位于所述低压绕组(12)与所述铁心主柱(9)之间的正下方，所述电容电流取样盒(3)、振动传感器(2)、上部探测线圈(5)、下部探测线圈(6)均与所述信号处理单元(4)相连接。The six capacitive current sampling boxes (3) are respectively arranged at the end screens of the A phase, B phase, and C phase of the medium voltage bushing (7) of the transformer and the A phase, B phase, and B phase of the low voltage bushing (8). At the end screen of phase C, the vibration sensor (2) is arranged at the center of the oil tank (1) of the transformer, and a plurality of transformer windings are arranged inside the transformer, and the transformer windings include: the main column of the iron core (9), the upper iron Yoke (10), lower iron yoke (11), low-voltage winding (12), medium-voltage winding (13) and high-voltage winding (14), the low-voltage winding (12), medium-voltage winding (13) and high-voltage winding (14 ) are sleeved on the main column (9) of the iron core in turn from the inside to the outside, the upper detection coil (5) is arranged at the lower end of the upper iron yoke (10), and the upper detection coil (5) is located at Directly above between the medium voltage winding (13) and the low voltage winding (12), the lower detection coil (6) is arranged on the upper end of the lower iron yoke (11), and the lower detection coil (6) Located directly below between the low-voltage winding (12) and the main column of the iron core (9), the capacitive current sampling box (3), the vibration sensor (2), the upper detection coil (5), the lower detection coil ( 6) are all connected to the signal processing unit (4).
  2. 根据权利要求1所述的基于不停电检测的变压器绕组变形程度评估装置，其特征在于，所述上部探测线圈(5)和下部探测线圈(6)均为圆形结构，所述上部探测线圈(5)的直径的值为中压绕组(13)半径与低压绕组(12)半径的差值，所述下部探测线圈(6)的直径的值为低压绕组(12)半径与铁心主柱(9)半径的差值。The transformer winding deformation evaluation device based on non-stop detection according to claim 1, characterized in that, the upper detection coil (5) and the lower detection coil (6) are circular structures, and the upper detection coil ( 5) The value of the diameter is the difference between the radius of the medium voltage winding (13) and the radius of the low voltage winding (12), and the value of the diameter of the lower detection coil (6) is the difference between the radius of the low voltage winding (12) and the main column of the iron core (9 ) radius difference.
  3. 根据权利要求2所述的基于不停电检测的变压器绕组变形程度评估装置，其特征在于，所述上部探测线圈(5)和下部探测线圈(6)均通过探测线圈信号线(15)与所述信号处理单元(4)相连接，所述探测线圈信号线(15)的外部设置有绝缘纸板(16)和铁磁屏蔽片。The transformer winding deformation evaluation device based on non-stop detection according to claim 2, characterized in that, both the upper detection coil (5) and the lower detection coil (6) communicate with the detection coil signal line (15) The signal processing unit (4) is connected to each other, and an insulating cardboard (16) and a ferromagnetic shielding sheet are arranged outside the detection coil signal line (15).
  4. 根据权利要求3所述的基于不停电检测的变压器绕组变形程度评估装置，其特征在于，所述探测线圈信号线(15)包括：探测线圈信号线A(17)和探测线圈信号线B(18)，探测线圈信号线A(17)和探测线圈信号线B(18)相配合实现一个探测线圈的信号传输，所述铁磁屏蔽片上设置有磁路分割线(19)，所述铁磁屏蔽片由磁路分割线(19)分为铁磁屏蔽片A(20)和铁磁屏蔽片B(21)，所述铁磁屏蔽片A(20)和铁磁屏蔽片B(21)的一端相连，所述铁磁屏蔽片A(20)与所述探测线圈信号线A(17)的位置相对应，所述铁磁屏蔽片B(21)与所述探测线圈信号线B(18)的位置相对应。The transformer winding deformation evaluation device based on non-stop detection according to claim 3, wherein the detection coil signal line (15) comprises: detection coil signal line A (17) and detection coil signal line B (18 ), the detection coil signal line A (17) and the detection coil signal line B (18) cooperate to realize the signal transmission of a detection coil, the magnetic circuit dividing line (19) is arranged on the ferromagnetic shielding sheet, and the ferromagnetic shielding The sheet is divided into ferromagnetic shielding sheet A (20) and ferromagnetic shielding sheet B (21) by the magnetic circuit dividing line (19), and one end of the ferromagnetic shielding sheet A (20) and ferromagnetic shielding sheet B (21) The ferromagnetic shielding sheet A (20) corresponds to the position of the detection coil signal line A (17), and the ferromagnetic shielding sheet B (21) corresponds to the position of the detection coil signal line B (18). corresponding to the location.
  5. 基于不停电检测的变压器绕组变形程度评估方法，其特征在于，包括以下步骤：The method for evaluating the degree of deformation of transformer windings based on non-stop detection is characterized in that it includes the following steps:
    S1、绕组变形信号监测；通过提取振动传感器的监测信号进行分析识别，提取电压信号 的各次谐波分量有效值和特征频率峰值；通过六个电容电流取样盒分别得到中压套管A相、B相、C相的电容电流和低压套管A相、B相、C相的电容电流；通过上部探测线圈和下部探测线圈，分别监测由于绕组形变造成漏磁信号变化；S1. Winding deformation signal monitoring; by extracting the monitoring signal of the vibration sensor for analysis and identification, the effective value of each harmonic component and the peak value of the characteristic frequency of the voltage signal are extracted; through six capacitive current sampling boxes, the medium voltage bushing phase A, The capacitive current of phase B and phase C and the capacitive current of phase A, phase B and phase C of the low-voltage bushing; through the upper detection coil and the lower detection coil, respectively monitor the change of the magnetic flux leakage signal caused by the deformation of the winding;
    S2、绕组变形信号提取分析；S2, winding deformation signal extraction and analysis;
    振动传感器监测信号分析，得到同一时刻下各谐波分量的电压信号有效值U i，U i均为50HZ的倍频信号，通过信号特征提取： Vibration sensor monitoring signal analysis, the effective value U i of the voltage signal of each harmonic component at the same time is obtained, and U i is a 50HZ double frequency signal, through signal feature extraction:
    总谐波畸变率
    Figure PCTCN2022133136-appb-100001
    THD
    Figure PCTCN2022133136-appb-100001
    相对电容比监测，实时提取中压套管A相、B相、C相的电容电流取样盒中数据，得到中压套管A相、B相、C相分别对应的电容电流I 12A、I 12B、I 12C，其初始电流分别为I 02A、I 02B、I 02C；实时提取低压套管A相、B相、C相的电容电流取样盒中数据，得到低压套管A相、B相、C相分别对应的电容电流I 11A、I 11B、I 11C，其初始电流分别为I 01A、I 01B、I 01C； Relative capacitance ratio monitoring, real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the medium voltage bushing, and obtaining the corresponding capacitance currents I 12A , I 12B of phase A, phase B, and phase C of the medium voltage bushing respectively , I 12C , whose initial currents are I 02A , I 02B , and I 02C ; real-time extraction of the data in the sampling box of the capacitance current of phase A, phase B, and phase C of the low-voltage bushing to obtain phase A, phase B, and phase C of the low-voltage bushing The corresponding capacitive currents I 11A , I 11B , and I 11C respectively, and their initial currents are I 01A , I 01B , and I 01C ;
    漏磁信号监测，由分别设置于A相变压器绕组、B相变压器绕组、C相变压器绕组处的上部探测线圈得到U b1A、U b1B、U b1C，分别表征A相、B相、C相的上部漏磁场信号的强弱，分别设置于A相变压器绕组、B相变压器绕组、C相变压器绕组处的下部探测线圈得到U b2A、U b2B、U b2C，分别表征A相、B相、C相的下部漏磁场信号的强弱； Flux leakage signal monitoring: U b1A , U b1B , and U b1C are obtained from the upper detection coils respectively arranged at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding, respectively representing the upper parts of A-phase, B-phase, and C-phase The strength of the leakage magnetic field signal is obtained from the lower detection coils at the A-phase transformer winding, B-phase transformer winding, and C-phase transformer winding respectively to obtain U b2A , U b2B , and U b2C , which represent the phase A, phase B, and phase C respectively. The intensity of the leakage magnetic field signal at the lower part;
    S3、绕组变形程度评估；S3. Evaluation of winding deformation degree;
    振动监测特征量Z：Vibration monitoring characteristic quantity Z:
    如果THD>5且U i中的最大值对应的谐波频率≥1000HZ，Z＝2，否则Z＝1； If THD>5 and the harmonic frequency corresponding to the maximum value in U i is ≥1000HZ, Z=2, otherwise Z=1;
    相对电容电流比特征量C i： Relative capacitance-current ratio characteristic quantity C i :
    取
    Figure PCTCN2022133136-appb-100002
    三者中的最大值为MAX c，     Pick
    Figure PCTCN2022133136-appb-100002
    The maximum of the three is MAX c ,
    若1.1≤MAX c≤1.3，则C i＝2，若MAX c＞1.3，则C i＝3，否则C i＝1； If 1.1≤MAX c ≤1.3, then C i =2, if MAX c >1.3, then C i =3, otherwise C i =1;
    漏磁信号监测特征量U b： Magnetic flux leakage signal monitoring characteristic quantity U b :
    取
    Figure PCTCN2022133136-appb-100003
    三者中的最大值为MAX u，     Pick
    Figure PCTCN2022133136-appb-100003
    The largest of the three is MAX u ,
    若1.2≤MAX u＜1.4，则U b＝2，若MAX u≥1.4，则U b＝4，否则U b＝1； If 1.2≤MAX u <1.4, then U b =2, if MAX u ≥1.4, then U b =4, otherwise U b =1;
    得到变压器绕组变形程度综合评估：A comprehensive evaluation of the deformation degree of the transformer winding is obtained:
    Figure PCTCN2022133136-appb-100004
    Figure PCTCN2022133136-appb-100004
    若B≤5，变压器绕组没有变形；If B≤5, the transformer winding is not deformed;
    若5<B≤20，变压器绕组存在轻微变形；If 5<B≤20, the transformer winding is slightly deformed;
    若20<B≤40，变压器绕组存在一般变形；If 20<B≤40, the transformer winding has general deformation;
    若40<B，变压器绕组存在严重变形。If 40<B, the transformer winding is seriously deformed.
PCT/CN2022/133136 2021-11-23 2022-11-21 Transformer winding deformation degree evaluation device and method based on non-power cut detection WO2023093660A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2023516799A JP7461568B2 (en) 2021-11-23 2022-11-21 Apparatus and method for evaluating the degree of deformation of transformer windings based on uninterruptible power failure detection

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111392730.7A CN114200349B (en) 2021-11-23 2021-11-23 Transformer winding deformation degree evaluation method based on uninterrupted power supply detection
CN202111392730.7 2021-11-23

Publications (1)

Publication Number Publication Date
WO2023093660A1 true WO2023093660A1 (en) 2023-06-01

Family

ID=80648507

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/133136 WO2023093660A1 (en) 2021-11-23 2022-11-21 Transformer winding deformation degree evaluation device and method based on non-power cut detection

Country Status (3)

Country Link
JP (1) JP7461568B2 (en)
CN (1) CN114200349B (en)
WO (1) WO2023093660A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114200349B (en) * 2021-11-23 2023-10-13 国网山西省电力公司电力科学研究院 Transformer winding deformation degree evaluation method based on uninterrupted power supply detection

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007285782A (en) * 2006-04-14 2007-11-01 Uchihashi Estec Co Ltd Pole transformer diagnosis method
CN202582602U (en) * 2012-04-26 2012-12-05 江苏骏龙电力科技股份有限公司 Transformer running state comprehensive monitoring system
US20130282312A1 (en) * 2010-12-17 2013-10-24 Nilanga Abeywickrama Method And Apparatus For Transformer Diagnosis
CN105182099A (en) * 2015-06-17 2015-12-23 国家电网公司 Transformer winding deformation degree and fault diagnosis method based on frequency response analysis method
CN106526436A (en) * 2016-10-18 2017-03-22 西安交通大学 Transformer insulation aging state evaluation method based on vibration method
CN107202966A (en) * 2017-05-25 2017-09-26 云南电网有限责任公司电力科学研究院 The measuring method and system of a kind of alternate stray field of Transformer Winding
CN109856501A (en) * 2019-01-13 2019-06-07 广西电网有限责任公司南宁供电局 A kind of on-load tap changers of transformers and winding deformation fault detection method
US20200200813A1 (en) * 2018-12-21 2020-06-25 Zhejiang University Online diagnosis method for deformation position on trasnformation winding
CN113126007A (en) * 2021-04-21 2021-07-16 华北电力大学 Online measuring device and method for leakage magnetic field of oil-immersed transformer
CN114200349A (en) * 2021-11-23 2022-03-18 国网山西省电力公司电力科学研究院 Transformer winding deformation degree evaluation device and method based on uninterrupted power supply detection

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101976881B (en) 2010-08-27 2012-12-12 西安交通大学 On-line integrated device for transformer-protection and winding-deformation monitoring and application method thereof
CN102998545B (en) * 2011-09-16 2015-04-08 国网河南省电力公司电力科学研究院 Online transformer winding work state monitoring method
CN202404166U (en) * 2011-12-04 2012-08-29 江西省电力科学研究院 On-line monitoring system for vibration performance of transformer
CN104237705B (en) * 2014-09-30 2017-01-25 沈阳工业大学 Diagnostic method of multi-information fusion online monitoring device for windings of power transformers
CN205300880U (en) * 2015-10-20 2016-06-08 云南电网有限责任公司电力科学研究院 Transformer winding vibration manipulation test system
JP6869499B2 (en) * 2016-12-08 2021-05-12 ユカインダストリーズ株式会社 Diagnostic method and diagnostic equipment for transformer internal abnormalities and deterioration
CN106970297A (en) * 2017-05-25 2017-07-21 河海大学 A kind of online test method of the deformation of transformer winding based on vibration
CN110361088B (en) * 2019-08-14 2023-08-22 杭州柯林电气股份有限公司 Transformer mechanical stability fault monitoring and diagnosing system
CN110926591A (en) * 2019-12-13 2020-03-27 福开尔（西安）电气有限公司 Power transformer state monitoring system
CN212007767U (en) * 2020-05-06 2020-11-24 国网上海市电力公司 Power transformer mechanical state detection system

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007285782A (en) * 2006-04-14 2007-11-01 Uchihashi Estec Co Ltd Pole transformer diagnosis method
US20130282312A1 (en) * 2010-12-17 2013-10-24 Nilanga Abeywickrama Method And Apparatus For Transformer Diagnosis
CN202582602U (en) * 2012-04-26 2012-12-05 江苏骏龙电力科技股份有限公司 Transformer running state comprehensive monitoring system
CN105182099A (en) * 2015-06-17 2015-12-23 国家电网公司 Transformer winding deformation degree and fault diagnosis method based on frequency response analysis method
CN106526436A (en) * 2016-10-18 2017-03-22 西安交通大学 Transformer insulation aging state evaluation method based on vibration method
CN107202966A (en) * 2017-05-25 2017-09-26 云南电网有限责任公司电力科学研究院 The measuring method and system of a kind of alternate stray field of Transformer Winding
US20200200813A1 (en) * 2018-12-21 2020-06-25 Zhejiang University Online diagnosis method for deformation position on trasnformation winding
CN109856501A (en) * 2019-01-13 2019-06-07 广西电网有限责任公司南宁供电局 A kind of on-load tap changers of transformers and winding deformation fault detection method
CN113126007A (en) * 2021-04-21 2021-07-16 华北电力大学 Online measuring device and method for leakage magnetic field of oil-immersed transformer
CN114200349A (en) * 2021-11-23 2022-03-18 国网山西省电力公司电力科学研究院 Transformer winding deformation degree evaluation device and method based on uninterrupted power supply detection

Also Published As

Publication number Publication date
JP7461568B2 (en) 2024-04-03
CN114200349B (en) 2023-10-13
CN114200349A (en) 2022-03-18
JP2024503561A (en) 2024-01-26

Similar Documents

Publication Publication Date Title
WO2023093660A1 (en) Transformer winding deformation degree evaluation device and method based on non-power cut detection
CN101271129B (en) Sensor type high tension electricity energy gauging method
Ouyang et al. Analysis on the magnetic flux leakage distribution in the transformer under different winding deformation and typical working condition
WO2023179153A1 (en) Generator iron core loss test system and method for reducing test impulse current
WO2015180002A1 (en) Apparatus for judging failure of iron core and clamping part of ultra-high voltage electric reactor, and processing and eliminating same online
CN203178369U (en) Bushing monitoring system for intelligent substation
CN201877277U (en) Secondary winding structure for local magnetic biasing prevention current transformer
CN203673001U (en) Device for on-line monitoring dry-type reactors by measuring leakage magnetic field
CN207232291U (en) A kind of electrification detection system of power transformer loss
CN203324432U (en) Novel insulation online monitoring system for high-voltage capacitive electrical equipment
Wang et al. Analysis of influencing factors on site fault diagnosis of inter-turn short circuit fault of dry-type air-core shunt reactor
CN202383224U (en) Online monitoring apparatus for turn-to-turn short circuit of voltage transformer
Xian et al. Identification method of interturn short circuit fault for distribution transformer based on power loss variation
CN203659568U (en) Electromagnetic current transformer demagnetization device
CN203368041U (en) Device in on-line detection self-excitation type MCR for performing excitation control on state of thyristor
CN107589330A (en) A kind of electrification detection system and method for power transformer loss
Ji et al. A New Type of Current Mining Device for Testing the Insulation of High-Voltage Cables by Ground Current Method
CN208026824U (en) Dry type hollow reactor interturn short circuit measuring device with electricity
CN113419196A (en) Single-phase transformer winding parameter online monitoring method based on load change
Zhu et al. Research and application of on-line monitoring device for dry-type air-core reactor
CN201016997Y (en) Sensor type high-voltage electrical energy meter
Tong Research on intelligent online monitoring and evaluation of power transformer
Lu et al. Study on Characteristics and Test Judgment of Electrical Fault of High-Voltage Equipment.
CN220475464U (en) Capacitor voltage division type high-voltage side online energy taking and supplying device
CN217931884U (en) Generator export PT interturn insulation fault on-line diagnosis system

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 2023516799

Country of ref document: JP

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22897743

Country of ref document: EP

Kind code of ref document: A1