CN103123382A - Photoelectric combined detection method aiming at mutual inductor of distribution network - Google Patents
Photoelectric combined detection method aiming at mutual inductor of distribution network Download PDFInfo
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- CN103123382A CN103123382A CN2013100380222A CN201310038022A CN103123382A CN 103123382 A CN103123382 A CN 103123382A CN 2013100380222 A CN2013100380222 A CN 2013100380222A CN 201310038022 A CN201310038022 A CN 201310038022A CN 103123382 A CN103123382 A CN 103123382A
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Abstract
The invention discloses a photoelectric combined detection method aiming at a mutual inductor of a distribution network. The photoelectric combined detection method is to use various methods of a mutual inductor comprehensive detector, an ultraviolet detector, an infrared temperature measurer, a partial discharge detector, X-ray perspective detection and the like in a combined manner to meet with the requirements of judging the properties and positions of defects of the mutual inductor exactly. The photoelectric combined detection method aiming at the mutual inductor of the distribution network not only can determine whether a fault or a defect exists inside a PT (Potential Transformer) and a CT (Current Transformer) directly and judge the property of the fault or the defect in time, but also can further position the fault or the defect exactly.
Description
Technical field
The invention belongs to the power equipment detection method, particularly the electrical combined detection method technical field of a kind of distribution mutual inductor.
Background technology
Voltage transformer (VT) (PT) is voltage transformer (VT), and essence is a step-down transformer, and its Main Function is to provide necessary signals to reclosing; When the voltage transformer (VT) (PT) of part circuit use be capacitance type potential transformer the time, can provide signalling channel for carrier communication; In addition, voltage transformer (VT) (PT) is widely used in measurement in electric system, and department provides metered voltage for electric system.Its major failure is mainly long-time use, and thermal value is crossed ambassador and insulated to be in for a long time under high temperature and move, thereby causes insulation ag(e)ing, makes voltage transformer (VT) (PT) breakdown; Voltage transformer (VT) (PT) first side winding generation turn-to-turn short circuit in addition increases rapidly electric current, thereby the ferromagnetic saturated resonance overvoltage that causes makes insulation breakdown.
Current transformer (CT) and current transformer, essence are also to be a transformer, by with the primary side serial connection in the line, the large current conversion of primary side are become the normalized current of secondary side, for measuring.Because the primary side number of turn is less, the magnetic potential that secondary side produces is used for the magnetic potential of balance primary side current, therefore secondary side necessary short circuit in use makes it obtain enough large electric current, produces magnetic potential to reach balance.The excitatory iron core that makes of avoiding primary side current to produce is seriously saturated, causes current transformer (CT) heating, and insulation is burnt.
This shows, the source of failure of voltage transformer (VT) (PT), current transformer (CT) is mainly to be caused by burning by insulation, voltage transformer (VT) (PT), current transformer (CT) by progressively improving voltage, can produce the phenomenon of shelf depreciation after breakdown.But because Ultraviolet Detector and infrared radiation detection apparatus can only detect device external, the MPD600 detector also can only detect the partial discharge quantity information of tested mutual inductor, can't learn the defective form that tested test product is inner concrete.Based on above phenomenon, the present invention proposes a kind of method of electrical combined detection, the first observation by ultraviolet and infrared radiation detection apparatus, find the shelf depreciation position, by the detection of shelf depreciation, observe the shelf depreciation collection of illustrative plates, detect defect level, the real-time perspective that re-uses X-ray production apparatus detects, and finds rejected region, and definite defect property.By the method for joint-detection, realize obtaining quickly and accurately failure message, and then in time safeguard and change.
Summary of the invention
The invention provides a kind of method of electrical combined detection, to address the above problem.
technical scheme of the present invention is: a kind of for the electrical combined detection method of distribution mutual inductor, the present invention is with mutual inductor comprehensive detector, Ultraviolet Detector, infrared thermometer, the detection method of Partial discharge detector, radioscopy detection system is united use, with the character that reaches accurate judgement mutual inductor defective and the requirement of position, wherein: at first the method utilizes the mutual inductor comprehensive detector to carry out exciting test to voltage transformer (VT)/current transformer, record its excitation data and obtain knee voltage, keen current and the tested equipment resistance scaled value when 25 ℃ and 75 ℃, have zero defect to carry out preliminary judgement by the measurement to the mutual inductor parameter to mutual inductor, doubtful faulty equipment is passed through voltage transformer (VT) again, current transformer pressurizes and withstand voltage test, observe the discharge information of voltage transformer (VT)/current transformer with ultraviolet imager, observe the temperature variation of product to be tested with infrared thermoviewer, put detector with MPD600 office simultaneously and observe product to be tested in pressurization, the feature that collection of illustrative plates is put in office in withstand voltage process, come checkout equipment whether to have partial discharge phenomenon with this, by the analysis of playing a game high-volume, the character of defective is carried out certain judgement, the last paradoxical discharge position that with X-ray production apparatus, ultraviolet is photographed is again carried out emphasis and is taken, by the real-time analysis to the X ray digital picture, can intuitively find accurately voltage transformer (VT), there is the position of fault or defective in the inside of current transformer.
The device that the electrical combined detection method of the present invention is used:
1, ultraviolet imager, this device can pass through Real Time Observation, and the generating photon number of display device judges the position of defective with this.
2, infrared thermometer, this device is observed the temperature variation of product to be tested by observing in voltage transformer (VT) (voltage transformer (VT) (PT)), current transformer (current transformer (the CT)) process of boosting continuously, observes it and whether has defective.
3, pick-up unit is put in MPD600 office, by coupling capacitance, high-voltage signal is converted to the normal voltage that can be used for measuring, partial-discharge measuring device is coupled together, use mobile workstation that voltage transformer (VT) (voltage transformer (VT) (PT)), current transformer (current transformer (CT)) shelf depreciation collection of illustrative plates are presented in real time.
4, X-ray production apparatus under the prerequisite that properly protects, is taken voltage transformer (VT) (PT), current transformer (CT) image, demonstrates in real time its inner structure, can be good at observing obvious physical property defective and determines defect property and defect level.
The electrical combined detection method of a kind of distribution mutual inductor:
1, utilize the mutual inductor comprehensive detector to do the excitation experiment to voltage transformer (VT) (PT), current transformer (CT) equipment, survey its knee voltage, keen current, 25 ℃ the time and the resistance scaled value 75 ℃ the time, according to recording empirical value, judge whether to exist defective.
2, the shelf depreciation device is connected, with the electric charge calibrating device office of calibration high-volume, and observe ground unrest and whether meet the mutual inductor test standard.
3, boost gradually with regulator, improve at set intervals voltage 1kV, and after it is stable, with infrared thermometer and Ultraviolet Detector pictures taken, whether there is partial discharge phenomenon by the Ultraviolet Detector real-time monitored, observes the test product surface with infrared thermometer and whether have the temperature contrast phenomenon.
4, reach voltage transformer (VT) (PT), current transformer (CT) grade of rated voltage 80% the time, stop boosting, took with ultraviolet video camera and thermal camera every ten minutes, and observe whether exist abnormal.
5, take false voltage mutual inductor (PT), current transformer (CT) equipment with X-ray production apparatus, by real-time monitored X ray digital picture, observe whether there is open defect, and defective locations is accurately located.
Beneficial effect of the present invention is: the present invention is by electrical combined detection method, not only can determine directly whether voltage transformer (VT) (PT), current transformer (CT) device interior exist fault or defective and the timely character of judging defective or fault, and can further accurately locate fault or defective.
Description of drawings
Fig. 1 is the process flow diagram of electrical combined detection method;
Fig. 2 is the experimental arrangement figure schematic diagram of electrical combined detection method.
Embodiment
see Fig. 1, Fig. 2, a kind of for the electrical combined detection method of distribution mutual inductor, the present invention is with mutual inductor comprehensive detector, Ultraviolet Detector, infrared thermometer, the detection method of Partial discharge detector, radioscopy detection system is united use, with the character that reaches accurate judgement mutual inductor defective and the requirement of position, wherein: at first the method utilizes the mutual inductor comprehensive detector to carry out exciting test to voltage transformer (VT)/current transformer, record its excitation data and obtain knee voltage, keen current and the tested equipment resistance scaled value when 25 ℃ and 75 ℃, have zero defect to carry out preliminary judgement by the measurement to the mutual inductor parameter to mutual inductor, doubtful faulty equipment is passed through voltage transformer (VT) again, current transformer pressurizes and withstand voltage test, observe the discharge information of voltage transformer (VT)/current transformer with ultraviolet imager, observe the temperature variation of product to be tested with infrared thermoviewer, put detector with MPD600 office simultaneously and observe product to be tested in pressurization, the feature that collection of illustrative plates is put in office in withstand voltage process, come checkout equipment whether to have partial discharge phenomenon with this, by the analysis of playing a game high-volume, the character of defective is carried out certain judgement, the last paradoxical discharge position that with X-ray production apparatus, ultraviolet is photographed is again carried out emphasis and is taken, by the real-time analysis to the X ray digital picture, can intuitively find accurately voltage transformer (VT), there is the position of fault or defective in the inside of current transformer.
In Fig. 2 of the present invention:
1) isolating transformer: be a kind of 1/1 transformer, elementary single-phase be 220V, its effect is the electric insulation fully that makes primary side and secondary side, also make the loop isolation, utilize in addition the large characteristics of high-frequency loss of its iron core, import control loop into thereby suppress the high frequency clutter, and the secondary of isolating transformer is not connected with the earth, there is no potential difference (PD) between its any two lines and the earth, thereby guaranteed personal safety.
2) partial discharge-free test transformer: just refer to not have office's testing transformer high-volume, but present stage partial discharge-free test transformer be that office is high-volume very little, and the office that does not affect PD meter observation electrical equipment is high-volume.Use without the transformation exerciser is put in office is unlikely to affect experimental result with ground unrest under the assurance experimental situation.
3) coupling condenser: claiming again field coupled or electrostatic coupling, is a kind of coupling scheme that the existence due to distributed capacitance produces.Coupling condenser is to make forceful electric power and light current two systems by capacitor-coupled and isolation, and the high-frequency signal path is provided, and stops power current to enter weak electricity system, ensures personal safety.Except above effect, also can extract power-frequency voltage for protection and reclosing with the coupling condenser of capacitor-voltage detecting device, play the effect of voltage transformer (VT).In experimentation, high voltage is converted to the measuring voltage that pick-up unit is put in MPD600 office, feature is put in the office of detecting test product for experimental provision.
The electrical combined detection method of a kind of distribution mutual inductor:
1, utilize the mutual inductor comprehensive detector to do the excitation experiment to voltage transformer (VT) (PT), current transformer (CT) equipment, survey its knee voltage, keen current, 25 ℃ the time and the resistance scaled value 75 ℃ the time, according to recording empirical value, judge whether to exist defective.
2, device is put in office and connect, with the electric charge calibrating device office of calibration high-volume, and observe ground unrest and whether meet the mutual inductor test standard.
3, boost gradually with regulator, improve at set intervals voltage 1KV, and after it is stable, with infrared thermometer and Ultraviolet Detector pictures taken, whether there is partial discharge phenomenon by the Ultraviolet Detector real-time monitored, observes the test product surface with infrared thermometer and whether have the temperature contrast phenomenon.
4, reach voltage transformer (VT) (PT), current transformer (CT) grade of rated voltage 80% the time, stop boosting, took with ultraviolet video camera and thermal camera every ten minutes, and observe whether exist abnormal.
5, take false voltage mutual inductor (PT), current transformer (CT) equipment with X-ray production apparatus, by real-time monitored X ray digital picture, observe whether there is open defect, and defective locations is accurately located.
Claims (1)
1. one kind for the electrical combined detection method of distribution mutual inductor, it is characterized in that, with mutual inductor comprehensive detector, Ultraviolet Detector, infrared thermometer, the detection method of Partial discharge detector, radioscopy detection system is united use, with the character that reaches accurate judgement mutual inductor defective and the requirement of position, wherein: at first the method utilizes the mutual inductor comprehensive detector to carry out exciting test to voltage transformer (VT)/current transformer, record its excitation data and obtain knee voltage, keen current and the tested equipment resistance scaled value when 25 ℃ and 75 ℃, have zero defect to carry out preliminary judgement by the measurement to the mutual inductor parameter to mutual inductor, doubtful faulty equipment is passed through voltage transformer (VT) again, current transformer pressurizes and withstand voltage test, observe the discharge information of voltage transformer (VT)/current transformer with ultraviolet imager, observe the temperature variation of product to be tested with infrared thermoviewer, put detector with MPD600 office simultaneously and observe product to be tested in pressurization, the feature that collection of illustrative plates is put in office in withstand voltage process, come checkout equipment whether to have partial discharge phenomenon with this, by the analysis of playing a game high-volume, the character of defective is carried out certain judgement, the last paradoxical discharge position that with X-ray production apparatus, ultraviolet is photographed is again carried out emphasis and is taken, by the real-time analysis to the X ray digital picture, can intuitively find accurately voltage transformer (VT), there is the position of fault or defective in the inside of current transformer.
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Cited By (19)
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|---|---|---|---|---|
| CN103713215A (en) * | 2013-12-24 | 2014-04-09 | 中国科学院苏州生物医学工程技术研究所 | System and method for detecting X-ray tube running state |
| CN104459457A (en) * | 2013-09-25 | 2015-03-25 | 北京环境特性研究所 | Infrared and ultraviolet dual-path imaging power detector |
| CN105242092A (en) * | 2015-11-16 | 2016-01-13 | 彭冬青 | Self-inspection electronic voltage transformer |
| CN105242093A (en) * | 2015-11-16 | 2016-01-13 | 王爱玲 | Electronic current transformer |
| CN105259397A (en) * | 2015-11-16 | 2016-01-20 | 王爱玲 | Electronic voltage transformer |
| CN105300456A (en) * | 2015-11-16 | 2016-02-03 | 杨宁 | Automatic monitoring method of current transformer |
| CN105301328A (en) * | 2015-11-16 | 2016-02-03 | 彭冬青 | Usage method of self-check electronic voltage transformer |
| CN105388347A (en) * | 2015-11-16 | 2016-03-09 | 王爱玲 | Method for using electronic voltage transformer |
| CN105445516A (en) * | 2015-11-16 | 2016-03-30 | 彭冬青 | Using method of intelligent electronic current transformer |
| CN105445515A (en) * | 2015-11-16 | 2016-03-30 | 彭冬青 | Intelligent electronic current transformer |
| CN105466485A (en) * | 2015-11-16 | 2016-04-06 | 杨宁 | Automatic monitoring device of current transformer |
| CN105759099A (en) * | 2015-11-16 | 2016-07-13 | 彭冬青 | Intelligent electronic current transformer |
| CN105759100A (en) * | 2015-11-16 | 2016-07-13 | 彭冬青 | Intelligent electronic current transformer |
| CN105785094A (en) * | 2015-11-16 | 2016-07-20 | 彭冬青 | Self-inspection electronic voltage transformer |
| CN106443145A (en) * | 2016-08-30 | 2017-02-22 | 国网陕西省电力公司经济技术研究院 | Method for suppressing ferro-resonance by grounding of neutral point through ZnO non-linear resistor in power distribution network |
| CN110988772A (en) * | 2019-12-19 | 2020-04-10 | 国网山西省电力公司电力科学研究院 | Check-up comparison circuit of ultraviolet imager |
| CN110988773A (en) * | 2019-12-19 | 2020-04-10 | 国网山西省电力公司电力科学研究院 | Verification comparison method of ultraviolet imager |
| CN111044854A (en) * | 2019-12-11 | 2020-04-21 | 国网北京市电力公司 | Partial discharge detection method and device for dry-type equipment and electronic equipment |
| CN111313298A (en) * | 2020-03-09 | 2020-06-19 | 岭东核电有限公司 | Method for overhauling pouring type current transformer for nuclear power station |
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| CN103713215A (en) * | 2013-12-24 | 2014-04-09 | 中国科学院苏州生物医学工程技术研究所 | System and method for detecting X-ray tube running state |
| CN103713215B (en) * | 2013-12-24 | 2017-04-05 | 中国科学院苏州生物医学工程技术研究所 | X-ray tube condition monitoring system and method |
| CN105301328B (en) * | 2015-11-16 | 2016-06-08 | 国网山东省电力公司定陶县供电公司 | A kind of self-check type electronic type voltage transformer |
| CN105699731A (en) * | 2015-11-16 | 2016-06-22 | 王爱玲 | Electronic voltage transformer |
| CN105300456A (en) * | 2015-11-16 | 2016-02-03 | 杨宁 | Automatic monitoring method of current transformer |
| CN105301328A (en) * | 2015-11-16 | 2016-02-03 | 彭冬青 | Usage method of self-check electronic voltage transformer |
| CN105388347A (en) * | 2015-11-16 | 2016-03-09 | 王爱玲 | Method for using electronic voltage transformer |
| CN105445516A (en) * | 2015-11-16 | 2016-03-30 | 彭冬青 | Using method of intelligent electronic current transformer |
| CN105445515A (en) * | 2015-11-16 | 2016-03-30 | 彭冬青 | Intelligent electronic current transformer |
| CN105466485A (en) * | 2015-11-16 | 2016-04-06 | 杨宁 | Automatic monitoring device of current transformer |
| CN105510669A (en) * | 2015-11-16 | 2016-04-20 | 王爱玲 | Electronic current transformer |
| CN105548645A (en) * | 2015-11-16 | 2016-05-04 | 王爱玲 | Electronic current transformer |
| CN105606154A (en) * | 2015-11-16 | 2016-05-25 | 任荣源 | Automatic monitoring device for current transformer |
| CN105242093A (en) * | 2015-11-16 | 2016-01-13 | 王爱玲 | Electronic current transformer |
| CN105699730A (en) * | 2015-11-16 | 2016-06-22 | 王爱玲 | Electronic voltage transformer |
| CN105259397A (en) * | 2015-11-16 | 2016-01-20 | 王爱玲 | Electronic voltage transformer |
| CN105759099A (en) * | 2015-11-16 | 2016-07-13 | 彭冬青 | Intelligent electronic current transformer |
| CN105759100A (en) * | 2015-11-16 | 2016-07-13 | 彭冬青 | Intelligent electronic current transformer |
| CN105785094A (en) * | 2015-11-16 | 2016-07-20 | 彭冬青 | Self-inspection electronic voltage transformer |
| CN105527479B (en) * | 2015-11-16 | 2016-09-07 | 国网山东省电力公司沂水县供电公司 | Self-check type electronic type voltage transformer |
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| CN106443145A (en) * | 2016-08-30 | 2017-02-22 | 国网陕西省电力公司经济技术研究院 | Method for suppressing ferro-resonance by grounding of neutral point through ZnO non-linear resistor in power distribution network |
| CN106443145B (en) * | 2016-08-30 | 2018-11-30 | 国网陕西省电力公司经济技术研究院 | Power network neutral point is grounded the method for inhibiting ferromagnetic resonance through Zno varistor |
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Application publication date: 20130529 |