CN103278751A - Partial discharge comprehensive itinerant detector for high voltage electric power equipment - Google Patents
Partial discharge comprehensive itinerant detector for high voltage electric power equipment Download PDFInfo
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Abstract
The invention discloses a partial discharge comprehensive itinerant detector for high voltage electric power equipment. The partial discharge comprehensive itinerant detector for the high voltage electric power equipment is characterized by comprising a host and a sensor group connected with the host, wherein the sensor group comprises a transient state ground potential sensor, an ultrahigh frequency electromagnetic wave sensor, a non-contacting ultrasonic sensor and a contacting ultrasonic sensor; the transient state ground potential sensor is used for detecting a current pulse signal on the shell of the electric power equipment; the ultrahigh frequency electromagnetic wave sensor is used for detecting an electromagnetic wave signal transmitted from the inside of the electric power equipment; the non-contacting ultrasonic sensor is used for detecting an ultrasonic wave signal transmitted from the inside of the electric power equipment; the contacting ultrasonic sensor is used for detecting shell vibration caused by the ultrasonic wave signal transmitted from the inside of the electric power equipment; and the transient state ground potential sensor, the ultrahigh frequency electromagnetic wave sensor, the non-contacting ultrasonic sensor and the contacting ultrasonic sensor are all connected with the host. According to the partial discharge comprehensive itinerant detector, a transformer, a composite apparatus (gas insulated switchgear) and a switch cabinet can be conveniently subjected to partial discharge electrification detection, and the partial discharge comprehensive itinerant detector for the high voltage electric power equipment has the outstanding advantages of convenience in carrying the instrument, as well as quickness and intellectualization in detection.
Description
Technical field
The present invention relates to the comprehensive logging of a kind of high voltage electric power equip ment shelf depreciation, belong to high voltage power transmission and transformation technical field.
Background technology
Power equipment built-in electrical insulation defective is to cause its cause faults, and the detection method at insulation defect mainly contains withstand voltage test and Partial Discharge Detection at present.Consider that Partial Discharge Detection has outstanding advantage simple to operate, that can chargedly detect and can find early stage insulation defect, therefore, Partial Discharge Detection has become the main detection means of power equipment built-in electrical insulation defective.
So-called shelf depreciation (Partial Discharge), it is a kind of electrical discharge in the insulating medium, just refer under electric field action, to have only the subregion in the insulation system, a kind of electric discharge phenomena of the non-penetrability discharge channel that causes as metal spine, suspension electrode, insulation internal air gap etc.
Detection method for local discharge commonly used at present mainly contains uhf electromagnetic wave detection method, ultrasonic Detection Method, transient state earth potential detection method, high-frequency current pulse detection method, analyte detection method etc.There is some difference for the applicability of distinct methods: for switch cubicle, more effective detection method has transient state earth potential detection method, ultrasonic Detection Method and uhf electromagnetic wave detection method; For combined electrical apparatus (GIS), more effective detection method has ultrasonic Detection Method, uhf electromagnetic wave detection and SF6 analyte detection method etc.; For transformer, more effective detection method has ultrasonic Detection Method, high-frequency current pulse detection method and transformer oil analyte detection method (oil chromatography detection method) etc.
There are larger difference in different detection side's ratio juris and implementation thereof, and therefore, the Partial discharge detector that is applied to power equipment at present only possesses single detection method mostly, as high-frequency local discharging detector, ultrasound wave Partial discharge detector etc.Minority instrument producer is according to the needs of electrical production, also attempted the fusion of different detection methods, but all be confined to simple combination of channels, the Ultra TEV Plus that produces as Britain EA company is integrated in transient state earth potential detection method and non-contact type ultrasonic detection method in the handheld instrument, can be used for the switch cabinet state testing.
At present, the characteristics of transformer station's O﹠M work have determined the O﹠M personnel need effectively grasp the running status of all kinds of electrical equipments, yet the method unicity of Partial discharge detector has limited the realization of this target.Therefore, the substation operation personnel to the work of patrolling and examining of station equipment mainly based on tour.Since make an inspection tour mainly based on O﹠M personnel range estimation, ear listen, sense organ means such as nasil, hand are touched, be difficult to discovering device latent defect and hidden danger, reduced the operation of power networks reliability.
Summary of the invention
Not enough for solving on the prior art, the objective of the invention is to be according to power equipment O﹠M need of work, and provide a kind of comprehensive logging of high voltage electric power equip ment shelf depreciation that is applicable to transformer station's O﹠M work, it can pass through this carrier of handheld instrument, realize transformer, combined electrical apparatus (GIS) and switch cubicle shelf depreciation multi-method comprehensive detection, promote power transformation O﹠M level.
In order to achieve the above object, the technical solution used in the present invention is:
The comprehensive logging of a kind of high voltage electric power equip ment shelf depreciation, it is characterized in that: comprise main frame and the sensor groups that is connected with main frame, described sensor groups comprises the transient state earth potential sensor for detection of current pulse signal on the power equipment shell, for detection of the uhf electromagnetic wave sensor from the electromagnetic wave signal of power equipment internal communication, for detection of from the non-contact type ultrasonic sensor of the ultrasonic signal of power equipment internal communication and for detection of the contact ultrasonic sensor that causes the shell vibration from the inner ultrasonic signal of power equipment, described transient state earth potential sensor, the uhf electromagnetic wave sensor, non-contact type ultrasonic sensor and contact ultrasonic sensor all are connected with main frame.
Further, described main frame comprise for the embedded type main control system of realizing overall system control, many signal conditions module, be used for to the signal condition module output signal realize the indifference high speed acquisition data acquisition module, be used for data storage and management module that storage detects spectrogram and data, be used for realizing power equipment account the equipment account identification module of identification and the human-computer interaction module that is used for showing testing result and input user data automatically; Described data acquisition module, equipment account identification module, data storage and management module all are connected with embedded type main control system with human-computer interaction module, and described transient state earth potential sensor, uhf electromagnetic wave sensor, non-contact type ultrasonic sensor and contact ultrasonic sensor all are connected with data acquisition module by many signal conditions module.
As priority scheme, described transient state earth potential sensor is built in the main frame side, and the side surface of described main frame is attached on the power equipment shell, finishes the detection of current pulse signal on the power equipment shell by transient state earth potential sensor.
As priority scheme, described uhf electromagnetic wave sensor links to each other with main frame by coaxial N connector and concentric cable, described uhf electromagnetic wave sensor is arranged near near the non-metallic component of power equipment, by the uhf electromagnetic wave sensor is finished from the detection of the electromagnetic wave signal of power equipment internal communication near near the non-metallic component of power equipment.
As priority scheme, the non-contact type ultrasonic sensor is built in the main frame top, and described main frame top is used for finishing from the detection of the ultrasonic signal of power equipment internal communication near the hole place of power equipment.
As priority scheme, described contact ultrasonic sensor links to each other with main frame by BNC connector and concentric cable, described contact ultrasonic sensor is attached on the power equipment shell, is used for finishing the detection of the shell vibration that causes from the inner ultrasonic signal of power equipment.
As priority scheme, described many signal conditions module comprises corresponding to four road independent signals conditioning passage of different detecting sensors and nurses one's health channel attached four with four road independent signals and select a channel selector switch that described four road independent signals conditioning passage selects a channel selector switch to connect data acquisition module by four.
Different detecting sensors refer to above-mentioned transient state earth potential sensor, uhf electromagnetic wave sensor, non-contact type ultrasonic sensor and contact ultrasonic sensor.
As priority scheme, described four road independent signals conditioning passage comprises the transient state earth potential passage that is connected with transient state earth potential sensor, the uhf electromagnetic wave passage that is connected with uhf electromagnetic wave, with the non-contact type ultrasonic passage of non-contact type ultrasonic sensor and the contact ultrasonic passage that is connected with the contact ultrasonic sensor, described transient state earth potential passage, the uhf electromagnetic wave passage, non-contact type ultrasonic passage and contact ultrasonic passage all comprise and the filtering circuit that is connected corresponding to different detecting sensors and the amplifying circuit that is connected with filtering circuit, and described transient state earth potential passage and uhf electromagnetic wave passage also are provided with the envelope detection circuit that is connected with amplification circuit output end.
As priority scheme, described four road independent signals conditioning passage all adopts the aluminum cover plate to cover; Described four what select that a channel selector switch adopts is simulant electronic switch.
As priority scheme, what described embedded type main control system adopted is arm processor, and what described data acquisition module adopted is the FPGA module, and what described equipment account identification module adopted is the radio frequency module for reading and writing; What described data storage and management module adopted is SD card module for reading and writing; Described human-computer interaction module comprises LCD colorful display screen and thin film switch.
Tested multinomial transformer, combined electrical apparatus (GIS) and the switch cubicle of comprising has the instrument portabilityization, detects rapid and intelligentized outstanding advantage.
Adopt technique scheme, the present invention has reached following beneficial effect with respect to prior art:
1) shelf depreciation transient state earth potential detection technique, uhf electromagnetic wave detection technique, contact ultrasonic detection technique, non-contact type ultrasonic detection technique have effectively been merged, can realize multiple power equipment multi-method shelf depreciation comprehensive detection such as transformer, combined electrical apparatus (GIS), switch cubicle, improve the equipment deficiency recall rate.
2) be down to same level by using the envelope detection technology data sampling rate that different detection methods are required, and application simulation electronic switch, realized that same data acquisition module is to unified processing of different offices discharge signal, effectively reduce instrument size, realized hand-held, effectively promote transformer station's O﹠M personnel operation comfort level, improved work efficiency.
3) adopt the aluminum cover plate that each signal conditioning circuit is carried out shielding processing, effectively shielded the external signal interference, and reduce interchannel intersection and disturb, improved precision of test result.
4) employing is identified automatically based on the equipment account of RFID read-write technology, can obtain equipment under test account signal fast, realize detecting the auto-associating of data and equipment, help to detect the orderly management of data, be convenient to the contrast of historical data, improved the testing process intelligent level.
Description of drawings
Below in conjunction with accompanying drawing the specific embodiment of the present invention is described further, wherein:
Fig. 1 is the preferred implementation structural representation of the comprehensive logging of high voltage electric power equip ment shelf depreciation of the present invention;
Fig. 2 is the preferred implementation module diagram of the comprehensive logging of high voltage electric power equip ment shelf depreciation of the present invention;
Fig. 3 is many signal conditions functions of modules synoptic diagram in the embodiment illustrated in figures 1 and 2.
Fig. 4 is embodiment illustrated in figures 1 and 2 carries out the Partial Discharge Detection test in 110kV GIS wiring schematic diagram;
Fig. 5 is that the shelf depreciation logging uhf channel of Fig. 4 detects the interface.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with embodiment, further set forth the present invention.
What Fig. 1 and Fig. 2 showed is the preferred implementation of the comprehensive logging of high voltage electric power equip ment shelf depreciation of the present invention.As shown in the figure, the comprehensive logging of the shelf depreciation of present embodiment comprises main frame and the sensor groups that is connected with main frame.Sensor groups is made up of four kinds of partial discharge detecting sensor baseds such as transient state earth potential sensor 1, uhf electromagnetic wave sensor 2, non-contact type ultrasonic sensor 3 and contact ultrasonic sensors 4, and described main frame 5 is made up of embedded type main control system and many signal conditions module, data acquisition module, equipment account identification module, data storage and management module, human-computer interaction module.
In the present embodiment, transient state earth potential sensor 1, uhf electromagnetic wave sensor 2, non-contact type ultrasonic sensor 3 and contact ultrasonic sensor 4 all are connected with data acquisition module by many signal conditions module, and this data acquisition module, equipment account identification module, data storage and management module all are connected with embedded type main control system with human-computer interaction module.
A kind of preferred as technique scheme, the present invention has carried out optimal design aspect being achieved as follows.
Wherein, sensor groups aspect:
1) 1 employing of transient state earth potential sensor is built-in, is embedded in main frame 5 sides in advance, for detection of current pulse signal on the power equipment shell, finishes detection by main frame 5 side surfaces are attached on the power equipment shell;
2) uhf electromagnetic wave sensor 2 adopts external, link to each other with main frame 5 by N connector 6 and concentric cable 8, for detection of the electromagnetic wave signal from the power equipment internal communication, by uhf electromagnetic wave sensor 2 is finished detection near near the non-metallic component of power equipment;
3) 3 employings of non-contact type ultrasonic sensor are built-in, are embedded in main frame 5 tops in advance, for detection of the ultrasonic signal from the power equipment internal communication, by detection is finished near power equipment hole place in main frame 5 tops;
4) contact ultrasonic sensor 4 adopts external, links to each other with main frame 5 by BNC connector 7 and concentric cable 8, for detection of the shell vibration that causes from the inner ultrasonic signal of power equipment, finishes detection by sensor is attached on the power equipment shell.
Host aspect:
1) embedded type main control system adopts arm processor, realizes overall system control;
2) many signal conditions module comprises that four road independent signals conditioning passage and four corresponding to different detecting sensors selects a channel selector switch, each passage all comprises filtering circuit and amplifying circuit, and transient state earth potential passage and uhf electromagnetic wave passage are equipped with envelope detection circuit; The circuit of each signal condition passage all adopts the aluminum cover plate to cover, so that the interference of shielding external signal, and reduce interchannel intersection and disturb; Four select a channel selector switch to adopt simulant electronic switch to realize; Figure 3 shows that many signal conditions functions of modules synoptic diagram.
In the present embodiment, each signal condition passage refers to four road independent signals conditionings passage, and four road independent signals conditioning passage comprise the transient state earth potential passage that is connected with transient state earth potential sensor, the uhf electromagnetic wave passage that is connected with uhf electromagnetic wave, with the non-contact type ultrasonic passage of non-contact type ultrasonic sensor and the contact ultrasonic passage that is connected with the contact ultrasonic sensor.Described transient state earth potential passage, uhf electromagnetic wave passage, non-contact type ultrasonic passage and contact ultrasonic passage all comprise and the filtering circuit that is connected corresponding to different detecting sensors and the amplifying circuit that is connected with filtering circuit, and described transient state earth potential passage and uhf electromagnetic wave passage also are provided with the envelope detection circuit that is connected with amplification circuit output end, and described detecting circuit is connected with data acquisition module again.
3) data acquisition module adopts FPGA to realize, many signal conditions module with filtering circuit, amplifying circuit and the simulating signal after getting envelope detection circuit through the simulant electronic switch gating to unified data acquisition module (circuit), data acquisition module carries out high speed acquisition to the simulating signal of input, is converted to digital signal;
What 4) equipment account identification module adopted is the radio frequency module for reading and writing, and what namely adopt is radio frequency read-write (RFID) technology, and by cooperating with account storage tags on the power equipment shell with installation, realization power equipment account is identified automatically;
5) data storage and management module adopts the SD card module for reading and writing of SD card read-write technology, is used for storage and detects spectrogram and data;
6) human-computer interaction module comprises LCD colorful display screen 9 and membrane switch technology, and this membrane switch technology is provided with thin film switch 11 and function enter key 10, is used for showing testing result and input user data.
The comprehensive logging of 1 above-mentioned shelf depreciation is tested in conjunction with the embodiments, and the comprehensive logging of shelf depreciation of the present invention has good office and puts the detection performance.
Embodiment 1
In the selected signal condition module: the filtered band of transient state earth potential passage is 500kHz ~ 10MHz, the envelope time constant 1000ns of envelope detection circuit; The filtered band 400MHz of uhf electromagnetic wave passage ~ 1GHz, the envelope time constant 200ns of corresponding envelope detection circuit, non-contact type ultrasonic passage 30kHz ~ 50kHz, contact ultrasonic passage 20kHz ~ 100kHz; All passage enlargement factors are 100 times.
In the selected data acquisition channel, the data sampling frequency is 10MHz.
Below in conjunction with the Partial Discharge Detection performance by the comprehensive logging of applied voltage test checking shelf depreciation, the comprehensive logging of the shelf depreciation of present embodiment is done further explanation.
Fig. 4 shows is that the shelf depreciation of present embodiment is is comprehensively patrolled and examined and wiring schematic diagram for detection of GIS built-in electrical insulation defective.
Spine defect model Q artificially is set on the GIS center conductor.When trial voltage is 60kV, stable shelf depreciation takes place among the GIS, the office that this moment, pulse current method recorded high-volume is 13.7pC.
The comprehensive logging ultrahigh frequency of shelf depreciation sense channel detected value is between being between 37dB ~ 45dB, as shown in Figure 5; Ultrasound examination passage detected value has good office and puts the detection performance between 13dB ~ 18dB.
The present invention can pass through this carrier of handheld instrument, realizes transformer, combined electrical apparatus (GIS) and switch cubicle shelf depreciation multi-method comprehensive detection, promotes power transformation O﹠M level.Shelf depreciation transient state earth potential detection technique, uhf electromagnetic wave detection technique, contact ultrasonic detection technique, non-contact type ultrasonic detection technique have effectively been merged, can realize multiple power equipment multi-method shelf depreciation comprehensive detection such as transformer, combined electrical apparatus (GIS), switch cubicle, improve the equipment deficiency recall rate.
Through above-described embodiment as can be known, be down to same level by using the envelope detection technology data sampling rate that different detection methods are required, and application simulation electronic switch, realized that same data acquisition module is to unified processing of different offices discharge signal, effectively reduce instrument size, realize hand-held, effectively promoted transformer station's O﹠M personnel operation comfort level, improved work efficiency.And adopt the aluminum cover plate that each signal conditioning circuit is carried out shielding processing, and effectively shielded the external signal interference, and reduced interchannel intersection and disturb, improved precision of test result.
In addition, the present invention adopts based on the equipment account of RFID read-write technology and identifies automatically, can obtain equipment under test account signal fast, realize detecting the auto-associating of data and equipment, help to detect the orderly management of data, be convenient to the contrast of historical data, improved the testing process intelligent level.
With embodiment the present invention has been done detailed explanation by reference to the accompanying drawings above, but the present invention is not limited to this, any those skilled in the art under the prerequisite of aim of the present invention, can make various distortion and modification to it in the ken that possesses.
Claims (10)
1. comprehensive logging of high voltage electric power equip ment shelf depreciation, it is characterized in that: comprise main frame and the sensor groups that is connected with main frame, described sensor groups comprises the transient state earth potential sensor for detection of current pulse signal on the power equipment shell, for detection of the uhf electromagnetic wave sensor from the electromagnetic wave signal of power equipment internal communication, for detection of from the non-contact type ultrasonic sensor of the ultrasonic signal of power equipment internal communication and for detection of the contact ultrasonic sensor that causes the shell vibration from the inner ultrasonic signal of power equipment, described transient state earth potential sensor, the uhf electromagnetic wave sensor, non-contact type ultrasonic sensor and contact ultrasonic sensor all are connected with main frame.
2. the comprehensive logging of high voltage electric power equip ment shelf depreciation according to claim 1 is characterized in that: described main frame comprise for the embedded type main control system of realizing overall system control, many signal conditions module, be used for to the signal condition module output signal realize the indifference high speed acquisition data acquisition module, be used for data storage and management module that storage detects spectrogram and data, be used for realizing power equipment account the equipment account identification module of identification and the human-computer interaction module that is used for showing testing result and input user data automatically;
Described data acquisition module, equipment account identification module, data storage and management module all are connected with embedded type main control system with human-computer interaction module, and described transient state earth potential sensor, uhf electromagnetic wave sensor, non-contact type ultrasonic sensor and contact ultrasonic sensor all are connected with data acquisition module by many signal conditions module.
3. the comprehensive logging of high voltage electric power equip ment shelf depreciation according to claim 1 and 2, it is characterized in that: described transient state earth potential sensor is built in the main frame side, the side surface of described main frame is attached on the power equipment shell, finishes the detection of current pulse signal on the power equipment shell by transient state earth potential sensor.
4. the comprehensive logging of high voltage electric power equip ment shelf depreciation according to claim 1 and 2, it is characterized in that: described uhf electromagnetic wave sensor links to each other with main frame by coaxial N connector and concentric cable, described uhf electromagnetic wave sensor is arranged near near the non-metallic component of power equipment, by the uhf electromagnetic wave sensor is finished from the detection of the electromagnetic wave signal of power equipment internal communication near near the non-metallic component of power equipment.
5. the comprehensive logging of high voltage electric power equip ment shelf depreciation according to claim 1 and 2, it is characterized in that the non-contact type ultrasonic sensor is built in the main frame top, described main frame top is used for finishing from the detection of the ultrasonic signal of power equipment internal communication near the hole place of power equipment.
6. the comprehensive logging of high voltage electric power equip ment shelf depreciation according to claim 1 and 2, it is characterized in that described contact ultrasonic sensor links to each other with main frame by BNC connector and concentric cable, described contact ultrasonic sensor is attached on the power equipment shell, is used for finishing the detection of the shell vibration that causes from the inner ultrasonic signal of power equipment.
7. the comprehensive logging of high voltage electric power equip ment shelf depreciation according to claim 2, it is characterized in that: described many signal conditions module comprises corresponding to four road independent signals conditioning passage of different detecting sensors and nurses one's health channel attached four with four road independent signals and select a channel selector switch that described four road independent signals conditioning passage selects a channel selector switch to connect data acquisition module by four.
8. the comprehensive logging of high voltage electric power equip ment shelf depreciation according to claim 7, it is characterized in that: described four road independent signals conditioning passage comprises the transient state earth potential passage that is connected with transient state earth potential sensor, the uhf electromagnetic wave passage that is connected with uhf electromagnetic wave, with the non-contact type ultrasonic passage of non-contact type ultrasonic sensor and the contact ultrasonic passage that is connected with the contact ultrasonic sensor, described transient state earth potential passage, the uhf electromagnetic wave passage, non-contact type ultrasonic passage and contact ultrasonic passage all comprise and the filtering circuit that is connected corresponding to different detecting sensors and the amplifying circuit that is connected with filtering circuit, and described transient state earth potential passage and uhf electromagnetic wave passage also are provided with the envelope detection circuit that is connected with amplification circuit output end.
9. according to claim 7 or the comprehensive logging of 8 described high voltage electric power equip ment shelf depreciations, it is characterized in that described four road independent signals conditioning passage all adopts the aluminum cover plate to cover; Described four what select that a channel selector switch adopts is simulant electronic switch.
10. according to claim 2, the comprehensive logging of 7 or 8 described high voltage electric power equip ment shelf depreciations, it is characterized in that: what described embedded type main control system adopted is arm processor, what described data acquisition module adopted is the FPGA module, and what described equipment account identification module adopted is the radio frequency module for reading and writing; What described data storage and management module adopted is SD card module for reading and writing; Described human-computer interaction module comprises LCD colorful display screen and thin film switch.
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| CN103884970A (en) * | 2014-03-25 | 2014-06-25 | 上海局放软件技术有限公司 | Partial discharge routing inspection device applicable to multiple detection methods |
| CN103954888A (en) * | 2014-03-31 | 2014-07-30 | 国家电网公司 | Suspension discharge test model suspension discharge detection positioning device and method |
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| CN104459493A (en) * | 2014-12-16 | 2015-03-25 | 江苏宝亨新电气有限公司 | Switch cabinet partial discharge on-line monitoring system |
| CN104535902A (en) * | 2014-11-25 | 2015-04-22 | 国家电网公司 | Partial discharge pulse detection system |
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| CN104749468A (en) * | 2015-03-31 | 2015-07-01 | 国家电网公司 | GIS fault diagnosis system and method thereof |
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| CN103884970A (en) * | 2014-03-25 | 2014-06-25 | 上海局放软件技术有限公司 | Partial discharge routing inspection device applicable to multiple detection methods |
| CN103954888A (en) * | 2014-03-31 | 2014-07-30 | 国家电网公司 | Suspension discharge test model suspension discharge detection positioning device and method |
| CN104375067A (en) * | 2014-11-18 | 2015-02-25 | 深圳供电局有限公司 | Partial discharge detection device and method of switchgear cubicle for loop network |
| CN104535902A (en) * | 2014-11-25 | 2015-04-22 | 国家电网公司 | Partial discharge pulse detection system |
| CN104360252A (en) * | 2014-12-03 | 2015-02-18 | 国家电网公司 | Acoustic and electric signal acquiring device and method of multichannel switch cabinet |
| CN104459493A (en) * | 2014-12-16 | 2015-03-25 | 江苏宝亨新电气有限公司 | Switch cabinet partial discharge on-line monitoring system |
| CN104569752A (en) * | 2014-12-27 | 2015-04-29 | 国家电网公司 | System for monitoring partial discharge of power distribution facilities |
| CN104749468A (en) * | 2015-03-31 | 2015-07-01 | 国家电网公司 | GIS fault diagnosis system and method thereof |
| CN104749468B (en) * | 2015-03-31 | 2017-09-19 | 国家电网公司 | A kind of GIS fault diagnosis systems and its method |
| CN104808123A (en) * | 2015-04-30 | 2015-07-29 | 国家电网公司 | Switchgear partial discharge detecting system |
| CN105182197B (en) * | 2015-09-11 | 2018-09-28 | 国网山东省电力公司电力科学研究院 | It is adapted to the superfrequency shelf depreciation collection of illustrative plates processing system and method for power industry |
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| CN106841836A (en) * | 2015-12-07 | 2017-06-13 | 国网甘肃省电力公司检修公司 | A kind of method and device that multi-functional detection is carried out to converting equipment running status |
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| CN109462282A (en) * | 2018-10-29 | 2019-03-12 | 国网河南省电力公司濮阳供电公司 | A kind of grid equipment defect pre-warning management system |
| CN110196080A (en) * | 2019-07-05 | 2019-09-03 | 北京华思博源科技有限公司 | A kind of oil-immersed transformer internal fault detection device |
| CN110988617A (en) * | 2019-11-18 | 2020-04-10 | 国网河北省电力有限公司电力科学研究院 | Power transformer discharge fault diagnosis method and device |
| CN111044861A (en) * | 2019-12-20 | 2020-04-21 | 上饶市中科院云计算中心大数据研究院 | Partial discharge detection method and device |
| CN112014699A (en) * | 2020-08-27 | 2020-12-01 | 国家电网有限公司 | High-voltage power equipment partial discharge comprehensive inspection instrument |
| CN112485611A (en) * | 2020-11-10 | 2021-03-12 | 国网山东省电力公司淄博供电公司 | Appearance is put in multi-functional portable heat office of transformer substation |
| CN112540271A (en) * | 2020-11-20 | 2021-03-23 | 沈阳达能电安全高新产业技术研究院有限公司 | Method and device for detecting partial discharge of cable |
| CN115865043A (en) * | 2022-11-04 | 2023-03-28 | 浙江黑卡电气有限公司 | Dynamic denoising circuit of multi-dimensional signal and processing method thereof |
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