CN104034255A - Power transformer winding deformation on-line detection method based on pulse coupling injection - Google Patents
Power transformer winding deformation on-line detection method based on pulse coupling injection Download PDFInfo
- Publication number
- CN104034255A CN104034255A CN201410315224.1A CN201410315224A CN104034255A CN 104034255 A CN104034255 A CN 104034255A CN 201410315224 A CN201410315224 A CN 201410315224A CN 104034255 A CN104034255 A CN 104034255A
- Authority
- CN
- China
- Prior art keywords
- signal
- winding
- voltage
- transformer
- pulse
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
Landscapes
- Testing Relating To Insulation (AREA)
Abstract
The invention discloses a power transformer winding deformation on-line detection method based on pulse coupling injection, and belongs to the technical field of electrical equipment on-line detection. The method comprises the steps that (1) a high-voltage nanosecond square-wave pulse generator generates high-voltage nanosecond pulse signals; (2) the high-voltage nanosecond pulse signals are injected into a protection circuit through signal injection and transmitted into a transformer signal sensor installed on a transformer casing pipe to be coupled to a winding; (3) a data acquisition module acquires the high-voltage nanosecond pulse signals and current response signals of the neutral point of the tail end of the winding and converts the high-voltage nanosecond pulse signals and the current response signals into digital signals; (4) a data processing module carries out Fourier transformation on the digital signals, works out a frequency-response curve of the winding, calculates characteristic parameters such as the correlation coefficient and the standard deviation of the frequency-response curve and judges the deformation degree of the transformer winding. By means of the method, non-intrusive on-line detection of winding deformation can be achieved. In addition, the method has the advantages that the detection speed is high, damage to an electric system is avoided, and the cost is low.
Description
Technical field
The invention belongs to power equipment online measuring technique field, relate to a kind of winding deformation of power transformer online test method of injecting based on pulse-couple.
Background technology
Power transformer is as transformer station's equipment of core the most, and its safe and stable operation has vital role to guaranteeing power supply reliability and improving economy.According to incompletely statistics, cause in the various failure factors of transformer damage and stoppage in transit, winding deformation occupies nearly half of the country.The transport of transformer, operation, the insulation ag(e)ing force majeure such as blast and earthquake impaired, oil dissolved gas all can cause winding distortion in various degree, particularly, in the situation of the externally ported short circuit of transformer in service, in winding, short-circuit current forms huge electromagnetic force and makes winding generation slight deformation fault.Along with the development of deformation extent, winding insulation is impaired, further reduces the anti-short circuit capability of winding, even final under less short-circuit current effect, transformer also can damage because of the expendable distortion of winding, causes the stoppage in transit of electrical network.
At present, scholar is just actively pushing forward carrying out of deformation of transformer winding detection field research work all over the world.The methods such as short circuit impedance method, Low Voltage Impulse Method, frequency response method, vibratory drilling method and supercritical ultrasonics technology are successively invented.Wherein, frequency response method is considered to economic, effective, reproducible, highly sensitive mode, is widely used in the test event of electric system, and the method has also been put into industry standard simultaneously.But this mode needs transformer out of service, cannot in the time that normally working, obtain effectively in time by transformer the state that winding changes, can not on-line tracing and find the distortion fault of winding, probably cause the catastrophic discontinuityfailure of transformer.Therefore, if can carry out on-line monitoring and the detection of winding deformation of power transformer fault, obtain in time the situation of winding, the latency fault of early warning winding, the maintenance of planned arrangement transformer, by ensureing the safe and stable operation of electric system, improves the reliability of power supply, promote economic benefit, there is very important Practical significance.
In existing deformation of transformer winding detection method, many proportions response method, mainly comprises the steps: to generate swept-frequency signal, is loaded on winding; Data acquisition circuit gathers voltage signal; Data processing module carries out frequency response conversion to the digital signal gathering, and calculates winding deformation and differentiate related coefficient, can realize the deformation of transformer winding degree that detects.But the method only can be used by off-line, cannot detect the distortion of Winding in Power Transformer online, can not obtain in time the information of winding deformation, thereby be difficult to resist catastrophic discontinuityfailure.
Summary of the invention
In view of this, the object of the present invention is to provide a kind of winding deformation of power transformer online test method of injecting based on pulse-couple, it is fast, harmless and can realize the advantages such as online detection to electric system that the method has non-intrusion type, detection speed.
For achieving the above object, the invention provides following technical scheme:
A winding deformation of power transformer online test method of injecting based on pulse-couple, comprises the following steps: step 1: high-voltage nanosecond squarer generates high-voltage nanosecond pulse signal; Step 2: high-voltage nanosecond pulse signal, through signal injection and holding circuit, transfers to the transformer signal transducer that is installed on bushing shell for transformer, by nanosecond pulse signal coupling to winding; Step 3: the current responsing signal of data collecting module collected high-voltage nanosecond pulse signal and winding end neutral point, and be converted into digital signal; Step 4: data processing module carries out Fourier transform to described digital signal, asks for the frequency response curve of winding, and calculates the characteristic parameter such as related coefficient, standard deviation of described frequency response curve, differentiates the deformation extent of Transformer Winding.
Further, in step 1, communicate by letter with central control module by host computer, host computer provides the parameter instruction of required generation high-voltage nanosecond pulse, and central control module produces corresponding driving signal, and driving pulse circuit for generating produces high-voltage nanosecond pulse;
Described central control module comprises single machine unit, field programmable gate array unit, regulating circuit unit and synchronous trigger circuit unit; Described single machine unit, be used for generating triggering and control parameter, generate and control parameter and trigger parameter through field programmable gate array unit, pass through respectively regulating circuit unit and synchronous trigger element formation voltage conditioned signal and synchronous triggering signal, transfer to pulse generating circuit;
Described pulse generating circuit is mainly made up of Marx generator, comprise high-voltage DC power supply, diode, charging capacitor, mos field effect transistor switch, wherein high-voltage DC power supply carries out Based Intelligent Control by described voltage conditioned signal, and mos field effect transistor switch is carried out the Based Intelligent Control of switch conduction and shutoff by described synchronous triggering signal.
Further, in step 2, signal injection and holding circuit are made up of build-out resistor, filter capacitor, gas-discharge tube and the voltage dependent resistor (VDR) of mating with coaxial ultrahigh frequency cable, and transformer signal transducer is installed near on the bushing shell for transformer external insulation layer of ground connection flange;
Signal injection and holding circuit forward are realized nanosecond pulse signal lossless and are injected into transformer signal transducer, oppositely play filter action for the sleeve pipe guide rod power frequency high voltage of transformer signal transducer coupling simultaneously, played the effect of Hi-pass filter, protection high-voltage nanosecond squarer is not subject to power frequency high voltage affect and damage;
Transformer signal transducer is the metal sheet band being wrapped on transformer high-voltage bushing external insulation layer, and configuration interface, the inner guide rod of described metal sheet band and bushing shell for transformer and sleeve pipe medium form coupling capacitance, and the manifold type that can realize nanosecond pulse signal based on this coupling capacitance is injected into the head end of winding.
Further, in step 3, data acquisition module is mainly made up of analog to digital converter, voltage sensor, current sensor, Hi-pass filter, by voltage sensor, described high-voltage nanosecond pulse signal is converted to low amplitude value voltage, by analog to digital converter, low voltage signal is carried out to data acquisition; Current sensor opposing connection group end neutral point current signal carries out I-V conversion simultaneously, and through Hi-pass filter, when filtering power current signal, gather high frequency response signal, and by analog to digital converter, low voltage signal is carried out to data acquisition, transfer to data processing module.
Further, in step 4, data processing module comprises frequency response curve drafting module, characteristic parameter computing module and winding state judge module; Described frequency response curve drafting module, carries out Fourier transform by the digital signal of data collecting module collected, carries out the calculating of frequency response data according to following formula, thereby draws frequency response curve:
In formula, I
out(f) be the current responsing signal of winding end neutral point, V
in(f) be high-voltage nanosecond pulse signal;
Characteristic parameter computing module, calculates the characteristic parameters such as related coefficient, standard deviation, the corresponding situation of extreme point according to frequency response data; Winding state is passed judgment on module the criterion of characteristic parameter and winding deformation is contrasted, thereby judges the degree of winding deformation, obtains the state of winding, realizes the online detection of winding deformation.
Beneficial effect of the present invention is: 1, the present invention adopts transformer signal transducer, thereby the non-intrusion type of truly having realized winding deformation detects online.This sensor bulk is little, and quality is light, does not change the original wiring of electric system, safer.2, the present invention adopts high-voltage nanosecond pulse signal excitation winding, because its frequency band is higher, has avoided power frequency and part undesired signal, has improved the ability of anti-electromagnetic interference (EMI).3, the present invention adopts high-voltage nanosecond pulse signal, because it comprises abundant spectrum component, can, in the situation that only inputting several pulse, realize fast detecting, improves the speed and the efficiency that detect.4, the present invention adopts high-voltage nanosecond pulse signal, because its generation circuit is simply various, has greatly simplified required device volume and the quantity of method, has reduced cost simultaneously.5, the present invention carries out the assessment of winding deformation state according to frequency-response characteristic parameter, comparatively directly perceived.
Brief description of the drawings
In order to make object of the present invention, technical scheme and beneficial effect clearer, the invention provides following accompanying drawing and describe:
Fig. 1 is the process flow diagram of the method for the invention;
Fig. 2 is transformer signal transducer installation site figure of the present invention;
Fig. 3 is the realization figure of the method for the invention;
Fig. 4 is that the method for the invention applies to an on high-tension side frequency response curve of 110kV/10.5kV three-phase transformer after overhaul.
Embodiment
Below in conjunction with accompanying drawing, the preferred embodiments of the present invention are described in detail.
Fig. 1 is the process flow diagram of the method for the invention, and the method for the invention comprises the following steps: step 1: high-voltage nanosecond squarer generates high-voltage nanosecond pulse signal; Step 2: high-voltage nanosecond pulse signal, through signal injection and holding circuit, transfers to the transformer signal transducer that is installed on bushing shell for transformer, by nanosecond pulse signal coupling to winding; Step 3: the current responsing signal of data collecting module collected high-voltage nanosecond pulse signal and winding end neutral point, and be converted into digital signal; Step 4: data processing module carries out Fourier transform to described digital signal, asks for the frequency response curve of winding, and calculates the characteristic parameter such as related coefficient, standard deviation of described frequency response curve, differentiates the deformation extent of Transformer Winding.
Wherein, in step 1, communicate by letter with central control module by host computer, host computer provides the parameter instruction of required generation high-voltage nanosecond pulse, and central control module produces corresponding driving signal, and driving pulse circuit for generating produces high-voltage nanosecond pulse;
Described central control module comprises single machine unit, field programmable gate array unit, regulating circuit unit and synchronous trigger circuit unit; Described single machine unit, be used for generating triggering and control parameter, generate and control parameter and trigger parameter through field programmable gate array unit, pass through respectively regulating circuit unit and synchronous trigger element formation voltage conditioned signal and synchronous triggering signal, transfer to pulse generating circuit;
Described pulse generating circuit is mainly made up of Marx generator, comprise high-voltage DC power supply, diode, charging capacitor, mos field effect transistor switch, wherein high-voltage DC power supply carries out Based Intelligent Control by described voltage conditioned signal, and mos field effect transistor switch is carried out the Based Intelligent Control of switch conduction and shutoff by described synchronous triggering signal.
In step 2, signal injection and holding circuit are made up of build-out resistor, filter capacitor, gas-discharge tube and the voltage dependent resistor (VDR) of mating with coaxial ultrahigh frequency cable, and transformer signal transducer is installed near on the bushing shell for transformer external insulation layer of ground connection flange;
Signal injection and holding circuit forward are realized nanosecond pulse signal lossless and are injected into transformer signal transducer, oppositely play filter action for the sleeve pipe guide rod power frequency high voltage of transformer signal transducer coupling simultaneously, played the effect of Hi-pass filter, protection high-voltage nanosecond squarer is not subject to power frequency high voltage affect and damage;
Transformer signal transducer is the metal sheet band being wrapped on transformer high-voltage bushing external insulation layer, and configuration interface, the inner guide rod of described metal sheet band and bushing shell for transformer and sleeve pipe medium form coupling capacitance, and the manifold type that can realize nanosecond pulse signal based on this coupling capacitance is injected into the head end of winding.
In step 3, data acquisition module is mainly made up of analog to digital converter, voltage sensor, current sensor, Hi-pass filter, by voltage sensor, described high-voltage nanosecond pulse signal is converted to low amplitude value voltage, by analog to digital converter, low voltage signal is carried out to data acquisition; Current sensor opposing connection group end neutral point current signal carries out I-V conversion simultaneously, and through Hi-pass filter, when filtering power current signal, gather high frequency response signal, and by analog to digital converter, low voltage signal is carried out to data acquisition, transfer to data processing module.
In step 4, data processing module comprises frequency response curve drafting module, characteristic parameter computing module and winding state judge module; Described frequency response curve drafting module, carries out Fourier transform by the digital signal of data collecting module collected, carries out the calculating of frequency response data according to following formula, thereby draws frequency response curve:
In formula, I
out(f) be the current responsing signal of winding end neutral point, V
in(f) be high-voltage nanosecond pulse signal;
Characteristic parameter computing module, calculates the characteristic parameters such as related coefficient, standard deviation, the corresponding situation of extreme point according to frequency response data; Winding state is passed judgment on module the criterion of characteristic parameter and winding deformation is contrasted, thereby judges the degree of winding deformation, obtains the state of winding, realizes the online detection of winding deformation.
Fig. 4 is that the method for the invention applies to an on high-tension side frequency response curve of 110kV/10.5kV three-phase transformer after overhaul.
Finally explanation is, above preferred embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is described in detail by above preferred embodiment, but those skilled in the art are to be understood that, can make various changes to it in the form and details, and not depart from the claims in the present invention book limited range.
Claims (5)
1. a winding deformation of power transformer online test method of injecting based on pulse-couple, is characterized in that: comprise the following steps:
Step 1: high-voltage nanosecond squarer generates high-voltage nanosecond pulse signal;
Step 2: high-voltage nanosecond pulse signal, through signal injection and holding circuit, transfers to the transformer signal transducer that is installed on bushing shell for transformer, by nanosecond pulse signal coupling to winding;
Step 3: the current responsing signal of data collecting module collected high-voltage nanosecond pulse signal and winding end neutral point, and be converted into digital signal;
Step 4: data processing module carries out Fourier transform to described digital signal, asks for the frequency response curve of winding, and calculates the characteristic parameter such as related coefficient, standard deviation of described frequency response curve, differentiates the deformation extent of Transformer Winding.
2. a kind of winding deformation of power transformer online test method of injecting based on pulse-couple according to claim 1, it is characterized in that: in step 1, communicate by letter with central control module by host computer, host computer provides the parameter instruction of required generation high-voltage nanosecond pulse, central control module produces corresponding driving signal, and driving pulse circuit for generating produces high-voltage nanosecond pulse;
Described central control module comprises single machine unit, field programmable gate array unit, regulating circuit unit and synchronous trigger circuit unit; Described single machine unit, be used for generating triggering and control parameter, generate and control parameter and trigger parameter through field programmable gate array unit, pass through respectively regulating circuit unit and synchronous trigger element formation voltage conditioned signal and synchronous triggering signal, transfer to pulse generating circuit;
Described pulse generating circuit is mainly made up of Marx generator, comprise high-voltage DC power supply, diode, charging capacitor, mos field effect transistor switch, wherein high-voltage DC power supply carries out Based Intelligent Control by described voltage conditioned signal, and mos field effect transistor switch is carried out the Based Intelligent Control of switch conduction and shutoff by described synchronous triggering signal.
3. a kind of winding deformation of power transformer online test method of injecting based on pulse-couple according to claim 1, it is characterized in that: in step 2, signal injection and holding circuit are made up of build-out resistor, filter capacitor, gas-discharge tube and the voltage dependent resistor (VDR) of mating with coaxial ultrahigh frequency cable, and transformer signal transducer is installed near on the bushing shell for transformer external insulation layer of ground connection flange;
Signal injection and holding circuit forward are realized nanosecond pulse signal lossless and are injected into transformer signal transducer, oppositely play filter action for the sleeve pipe guide rod power frequency high voltage of transformer signal transducer coupling simultaneously, played the effect of Hi-pass filter, protection high-voltage nanosecond squarer is not subject to power frequency high voltage affect and damage;
Transformer signal transducer is the metal sheet band being wrapped on transformer high-voltage bushing external insulation layer, and configuration interface, the inner guide rod of described metal sheet band and bushing shell for transformer and sleeve pipe medium form coupling capacitance, and the manifold type that can realize nanosecond pulse signal based on this coupling capacitance is injected into the head end of winding.
4. a kind of winding deformation of power transformer online test method of injecting based on pulse-couple according to claim 1, it is characterized in that: in step 3, data acquisition module is mainly made up of analog to digital converter, voltage sensor, current sensor, Hi-pass filter, by voltage sensor, described high-voltage nanosecond pulse signal is converted to low amplitude value voltage, by analog to digital converter, low voltage signal is carried out to data acquisition; Current sensor opposing connection group end neutral point current signal carries out I-V conversion simultaneously, and through Hi-pass filter, when filtering power current signal, gather high frequency response signal, and by analog to digital converter, low voltage signal is carried out to data acquisition, transfer to data processing module.
5. a kind of winding deformation of power transformer online test method of injecting based on pulse-couple according to claim 1, it is characterized in that: in step 4, data processing module comprises frequency response curve drafting module, characteristic parameter computing module and winding state judge module; Described frequency response curve drafting module, carries out Fourier transform by the digital signal of data collecting module collected, carries out the calculating of frequency response data according to following formula, thereby draws frequency response curve:
In formula, I
out(f) be the current responsing signal of winding end neutral point, V
in(f) be high-voltage nanosecond pulse signal;
Characteristic parameter computing module, calculates the characteristic parameters such as related coefficient, standard deviation, the corresponding situation of extreme point according to frequency response data;
Winding state is passed judgment on module the criterion of characteristic parameter and winding deformation is contrasted, thereby judges the degree of winding deformation, obtains the state of winding, realizes the online detection of winding deformation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315224.1A CN104034255B (en) | 2014-07-03 | 2014-07-03 | The winding deformation of power transformer online test method injected based on pulse-couple |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410315224.1A CN104034255B (en) | 2014-07-03 | 2014-07-03 | The winding deformation of power transformer online test method injected based on pulse-couple |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104034255A true CN104034255A (en) | 2014-09-10 |
| CN104034255B CN104034255B (en) | 2017-09-05 |
Family
ID=51465124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410315224.1A Expired - Fee Related CN104034255B (en) | 2014-07-03 | 2014-07-03 | The winding deformation of power transformer online test method injected based on pulse-couple |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104034255B (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833841A (en) * | 2015-05-06 | 2015-08-12 | 国家电网公司 | Substation intrusion overvoltage detection method |
| CN106240948A (en) * | 2016-08-08 | 2016-12-21 | 龙岩烟草工业有限责任公司 | Deformation tobacco bale detection method, device and system |
| CN106526409A (en) * | 2016-10-28 | 2017-03-22 | 华北电力大学（保定） | Transformer winding deformation live testing system and testing method thereof |
| CN107390081A (en) * | 2017-08-07 | 2017-11-24 | 华北电力大学 | It is a kind of to be used for the device and method being monitored powered to deformation of transformer winding |
| CN107478949A (en) * | 2017-08-07 | 2017-12-15 | 中国电力科学研究院 | A kind of deformation of transformer winding inline diagnosis method and system |
| CN108872856A (en) * | 2018-07-16 | 2018-11-23 | 山东固特电气有限公司 | Generator amature winding state detection device and method |
| CN109191448A (en) * | 2018-09-03 | 2019-01-11 | 重庆大学 | The transformer fault identification technology with Digital Image Processing is drawn based on three-dimensional coordinate |
| CN109525212A (en) * | 2018-12-29 | 2019-03-26 | 西安交通大学 | A kind of intelligent scanning signal processing unit and working method |
| CN110763932A (en) * | 2019-10-14 | 2020-02-07 | 国网江苏省电力有限公司盐城供电分公司 | Transformer fault detection system based on non-contact injection excitation signal and detection method thereof |
| CN110824389A (en) * | 2019-11-19 | 2020-02-21 | 西南大学 | IFRA-based synchronous generator winding short-circuit fault detection method |
| CN113189515A (en) * | 2021-02-09 | 2021-07-30 | 重庆大学 | IFRA magnetic coupling-based reactor turn-to-turn short circuit fault non-contact type online detection method |
| CN113985166A (en) * | 2021-10-19 | 2022-01-28 | 国网重庆市电力公司电力科学研究院 | Sleeve and transformer winding state monitoring device based on pulse frequency response method |
| CN114396866A (en) * | 2021-12-30 | 2022-04-26 | 广东电网有限责任公司 | Transformer winding deformation fault detection method and device |
| CN114859271A (en) * | 2022-04-18 | 2022-08-05 | 云南电网有限责任公司电力科学研究院 | Method, apparatus and system for diagnosing winding state of transformer, apparatus and medium |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020011848A1 (en) * | 2000-05-04 | 2002-01-31 | Coffeen Larry T. | System and method for on-line impulse frequency response analysis |
| CN101556299A (en) * | 2009-05-18 | 2009-10-14 | 重庆电力科学试验研究院 | Method for detecting micro deformation of transformer winding |
| CN101701995A (en) * | 2009-11-12 | 2010-05-05 | 重庆大学 | Impulse response analytical test apparatus and method for detecting deformation of transformer winding |
| CN101745178A (en) * | 2009-12-17 | 2010-06-23 | 重庆大学 | Portable high-voltage nanosecond squarer |
| US20100211339A1 (en) * | 2007-09-27 | 2010-08-19 | Prasad Madhukar Joshi | Diagnostic method for determining deformations in a transformer winding |
| CN101820270A (en) * | 2010-02-05 | 2010-09-01 | 重庆大学 | High pressure picosecond pulse generator |
| CN101937047A (en) * | 2009-06-30 | 2011-01-05 | 上海市电力公司 | Method of utilizing vibration waveform for detecting state of transformer winding |
| CN103712551A (en) * | 2013-12-04 | 2014-04-09 | 国家电网公司 | Power distribution network transformer low-voltage winding deformation on-line monitoring device and method |
| CN103743993A (en) * | 2013-10-16 | 2014-04-23 | 西安交通大学 | System for detecting transformer winding deformation and method thereof |
-
2014
- 2014-07-03 CN CN201410315224.1A patent/CN104034255B/en not_active Expired - Fee Related
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020011848A1 (en) * | 2000-05-04 | 2002-01-31 | Coffeen Larry T. | System and method for on-line impulse frequency response analysis |
| US20100211339A1 (en) * | 2007-09-27 | 2010-08-19 | Prasad Madhukar Joshi | Diagnostic method for determining deformations in a transformer winding |
| CN101556299A (en) * | 2009-05-18 | 2009-10-14 | 重庆电力科学试验研究院 | Method for detecting micro deformation of transformer winding |
| CN101937047A (en) * | 2009-06-30 | 2011-01-05 | 上海市电力公司 | Method of utilizing vibration waveform for detecting state of transformer winding |
| CN101701995A (en) * | 2009-11-12 | 2010-05-05 | 重庆大学 | Impulse response analytical test apparatus and method for detecting deformation of transformer winding |
| CN101745178A (en) * | 2009-12-17 | 2010-06-23 | 重庆大学 | Portable high-voltage nanosecond squarer |
| CN101820270A (en) * | 2010-02-05 | 2010-09-01 | 重庆大学 | High pressure picosecond pulse generator |
| CN103743993A (en) * | 2013-10-16 | 2014-04-23 | 西安交通大学 | System for detecting transformer winding deformation and method thereof |
| CN103712551A (en) * | 2013-12-04 | 2014-04-09 | 国家电网公司 | Power distribution network transformer low-voltage winding deformation on-line monitoring device and method |
Non-Patent Citations (2)
| Title |
|---|
| 何平等: "变压器绕组变形的频率响应分析法综述", 《高电压技术》 * |
| 李剑等: "变压器绕组轻微变形ns级脉冲响应分析法", 《高电压技术》 * |
Cited By (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104833841A (en) * | 2015-05-06 | 2015-08-12 | 国家电网公司 | Substation intrusion overvoltage detection method |
| CN106240948B (en) * | 2016-08-08 | 2018-09-14 | 龙岩烟草工业有限责任公司 | Deformation cigarette packet inspection method, device and system |
| CN106240948A (en) * | 2016-08-08 | 2016-12-21 | 龙岩烟草工业有限责任公司 | Deformation tobacco bale detection method, device and system |
| CN106526409A (en) * | 2016-10-28 | 2017-03-22 | 华北电力大学（保定） | Transformer winding deformation live testing system and testing method thereof |
| CN106526409B (en) * | 2016-10-28 | 2019-03-15 | 华北电力大学（保定） | A kind of deformation of transformer winding live testing system and its test method |
| CN107478949A (en) * | 2017-08-07 | 2017-12-15 | 中国电力科学研究院 | A kind of deformation of transformer winding inline diagnosis method and system |
| CN107390081A (en) * | 2017-08-07 | 2017-11-24 | 华北电力大学 | It is a kind of to be used for the device and method being monitored powered to deformation of transformer winding |
| US11131712B2 (en) | 2018-07-16 | 2021-09-28 | Shandong Gute Electric Co., Ltd. | Device and method for inspecting a condition of rotor windings of a generator |
| CN108872856A (en) * | 2018-07-16 | 2018-11-23 | 山东固特电气有限公司 | Generator amature winding state detection device and method |
| WO2020015045A1 (en) * | 2018-07-16 | 2020-01-23 | 山东固特电气有限公司 | Generator rotor winding state detection device and method |
| CN109191448A (en) * | 2018-09-03 | 2019-01-11 | 重庆大学 | The transformer fault identification technology with Digital Image Processing is drawn based on three-dimensional coordinate |
| CN109191448B (en) * | 2018-09-03 | 2021-11-02 | 重庆大学 | Transformer fault identification method based on three-dimensional coordinate drawing and digital image processing |
| CN109525212A (en) * | 2018-12-29 | 2019-03-26 | 西安交通大学 | A kind of intelligent scanning signal processing unit and working method |
| CN110763932A (en) * | 2019-10-14 | 2020-02-07 | 国网江苏省电力有限公司盐城供电分公司 | Transformer fault detection system based on non-contact injection excitation signal and detection method thereof |
| CN110824389A (en) * | 2019-11-19 | 2020-02-21 | 西南大学 | IFRA-based synchronous generator winding short-circuit fault detection method |
| CN113189515A (en) * | 2021-02-09 | 2021-07-30 | 重庆大学 | IFRA magnetic coupling-based reactor turn-to-turn short circuit fault non-contact type online detection method |
| CN113985166A (en) * | 2021-10-19 | 2022-01-28 | 国网重庆市电力公司电力科学研究院 | Sleeve and transformer winding state monitoring device based on pulse frequency response method |
| CN114396866A (en) * | 2021-12-30 | 2022-04-26 | 广东电网有限责任公司 | Transformer winding deformation fault detection method and device |
| CN114859271A (en) * | 2022-04-18 | 2022-08-05 | 云南电网有限责任公司电力科学研究院 | Method, apparatus and system for diagnosing winding state of transformer, apparatus and medium |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104034255B (en) | 2017-09-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104034255A (en) | Power transformer winding deformation on-line detection method based on pulse coupling injection | |
| CN101701995B (en) | Impulse response analytical test apparatus and method for detecting deformation of transformer winding | |
| CN104061851A (en) | Method for online monitoring deformation of transformer winding based on over-voltage response | |
| CN203365619U (en) | System for detecting and positioning partial discharge of cable oscillation waves | |
| CN104061850A (en) | Device for detecting deformation of transformer winding based on pulse on-line injection | |
| CN205080227U (en) | Ground net detecting system | |
| CN104330691A (en) | Online monitoring system for power transformer winding vibration signals | |
| CN103135041A (en) | Transformer/ electric reactor partial discharge on-line monitoring method and transformer/ electric reactor partial discharge on-line monitoring system | |
| CN103712551A (en) | Power distribution network transformer low-voltage winding deformation on-line monitoring device and method | |
| CN104793038A (en) | All-optical overvoltage monitoring device for electric power system | |
| CN105371742A (en) | Bushing tap pulse signal injection method-based transformer winding deformation detection device and method | |
| CN104061849B (en) | Winding deformation on-line detecting system based on transformator overvoltage signal and response | |
| CN103744004A (en) | Transformer/reactor partial discharge online monitoring method and monitoring system | |
| CN205210249U (en) | Partial discharge detector system based on ultrasonic sensor | |
| CN103743993B (en) | A kind of method detecting deformation of transformer winding | |
| CN203299307U (en) | Electrical equipment fault detection device | |
| CN103454487A (en) | Internal overvoltage early warning system of power distribution network | |
| CN203798969U (en) | Cable partial discharge detection system based on frequency conversion resonance voltage resistance | |
| CN206132912U (en) | A travelling wave pulse generator for direct current earthing pole line fault surveys | |
| CN204287336U (en) | The data processing equipment of high-tension cable on-line insulation monitoring | |
| CN106707093A (en) | Synchronization generator stator turn-to-turn short circuit detection method based on RSO method | |
| CN203551678U (en) | Online monitoring system of amorphous alloy tridimensional toroidal-core transformer | |
| CN202735470U (en) | Online monitoring system of partial discharge of GIS device | |
| CN203848796U (en) | On-line monitoring device of power distribution network transformer low-voltage winding deformation | |
| CN110231541B (en) | Method for carrying out inverse calculation on equivalent electrical parameters of system based on online monitoring of damped oscillation waves |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170905 Termination date: 20180703 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |