CN100356181C - AC-DC high-voltage insulator passive tester - Google Patents
AC-DC high-voltage insulator passive tester Download PDFInfo
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- CN100356181C CN100356181C CNB2004100134106A CN200410013410A CN100356181C CN 100356181 C CN100356181 C CN 100356181C CN B2004100134106 A CNB2004100134106 A CN B2004100134106A CN 200410013410 A CN200410013410 A CN 200410013410A CN 100356181 C CN100356181 C CN 100356181C
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- 239000012212 insulator Substances 0.000 title claims abstract description 82
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- 229920002994 synthetic fiber Polymers 0.000 description 2
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
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- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The present invention relates to an alternate-current/ direct-current high-voltage insulator passive detector. The detector is composed of a machine casing, a left measuring disc, a right measuring disc, measuring rods, measuring bar fixing flanges and an insulating rod, wherein the measuring rod fixing flanges are installed on both ends of the machine casing, the measuring rods are fixed on the measuring rod fixing flanges, the left measuring disc and right measuring disc are respectively installed on the measuring rod fixing flanges on the left side and the right side in the casing body, the left measuring disc and the right measuring disc are parallel, an insulator detecting circuit is arranged in the left measuring disc, a window is arranged on the left measuring disc, and the machine casing and the measuring rod fixing flanges are installed on the insulating rod. In detection, the detector is put in an electric field of an insulator, voltage difference is passively generated between the two measuring rods of the detectors, signals are primitively collected through a sensitive element, signals capable of being completely identified are obtained through direct-current amplification, filtration and alternate-current amplification, the signals are transmitted to a sampler for analysis and classification after being rectification and then are processed by a processor, and processed data is transmitted to a receiving device on the ground by a transmitter. The present invention can rapidly and quantitatively detect the voltage distribution condition of alternate-current/ direct-current insulators made of various materials under an electrified condition, and can accurately discover the hidden danger of insulators in time.
Description
Technical field
The present invention relates to a kind of detector, specifically is a kind of alternating current-direct current high-tension insulator passive type detector.
Background technology
Insulator is the most basic parts of electrical network, insulator occur null value or dirty be the root that flashover fault takes place.Along with the raising of net capacity increase and grade of rated voltage, the power system transmission line pollution flashover accident becomes increasingly conspicuous.The traditional detection method of insulator commonly used has following several at present:
Spark fork method: be the most frequently used detection method at present, this method is to contact with insulator according to the spark fork whether producing discharges judges the insulator quality.
Bead electric discharge: be detection method commonly used at present.This method is that the distance when producing discharge by the bead of measuring the insulator two ends is analyzed the voltage distribution of insulator, thereby judges whether tested insulator is normal.This method will frequently be adjusted the bead distance, and False Rate is bigger
Thermal infrared imager method: be present more advanced detection method.It is to utilize the thermal effect principle of insulator surface to carry out online detection.This method is very effective to the pollution proof insulator that scribbles semi-conducting glaze.Because during the online charging operation of this type of insulator, the surface current of normal insulation is bigger, temperature rise is higher, and the surface temperature of inferior insulator is easy to identification than the sub low good several years of normal insulation with thermal infrared imager.But for the porcelain insulator of glass insulator or common glaze, its normal surface temperature only differs about 1 ℃ than inferior insulator surface temperature, under the weather conditions and site environment of complexity, measures and difficulty, and precision is difficult to guarantee.
The insulation resistance method: also be advanced detection method: it is after recording the Leakage Current at the insulator two ends of flowing through by current sensor, in the mode of wireless telecommunications measurement result is transferred to the information processing centre information of carrying out again and focuses on, thereby realize remote measurement insulator.But the significant deficiency that this method exists is to install a cover pick-up unit on each insulator string, cost too high user in actual use be difficult to bear, and the Maintenance and Repair of device must just can be carried out in power failure.
Laser dopper flowmeter vibratory drilling method: be the centre of oscillation frequency and just often different characteristics of utilizing the insulator that ftractures, by external force as knocking iron tower or with ultrasound wave that ultrasonic generator produced, aim at tested insulator or aim at tested insulator with the parabolic type catoptron with lasing light emitter, to evoke the microvibration of insulator, the tested insulator of laser alignment that then the laser dopper flowmeter instrument is sent, according to analysis to the frequency spectrum of the signal that reflects, thereby obtain the centre of oscillation frequency values of this insulator, judge the quality of this insulator in view of the above.But because this instrument detects invalid problem and bulky, heavy to uncracked insulator, use and keep in repair shortcomings such as complexity, cost height, limited its scope of application.
In recent years domestic detection to insulator has had new progress, a kind of method is preferably arranged, employing applies the pulse voltage method to the tested insulator of charging operation and measures its insulating resistance value, realization is to the charged detection by quantitative of insulator, owing to adopt the method for pulse voltage, can be subjected to the restriction of limited voltage, the resistance value of the insulator that has will (even to 5-10 kilovolt) could accurately detect under very high voltage, detecting under situation about exchanging of having is normal value, but detect existing problems under the situation of direct current, this is the influence of measurement range and measuring accuracy.This method can be measured the comparatively obviously insulator of problem.
Several method respectively has short long in sum, but a common defective is arranged all, promptly all belong to qualitative detection, and the greatest problem of qualitative detection is the resistance value that can not reflect each insulator truly, more can't discern and leak electricity but puncture the insulator be in the critical damage state as yet, this is for the hidden danger of preventing accident, guarantee that line security stable operation is extremely disadvantageous, needs and the electric system do not satisfied about accelerating " construction of national grid datumization security system " realize requirement of scientific management to grid.
In addition, yet there is the blind area in the charged detection of different medium (pottery, glass, synthetic material etc.) insulator.
Direct current electric transmission and transformation develops rapidly in recent years, the dielectric strength of DC power transmission line not only should satisfy the requirement of the tolerance normal working voltage identical with AC input transformation, atmospheric over-voltage and internal overvoltage three aspects, and should have the effect of environmental factors such as resisting rain, mist, filth and the requirement of sea level elevation influence.Direct current transportation external insulation fault mainly is the flashover of external insulation and the porcelain bushing shell blast that causes because of flashover.Because the insulator contamination is more serious than exchanging under the DC voltage, and the direct current pollution flashover voltage of insulator is lower than exchanging under the identical filthy condition.Therefore, the Capability Requirement of insulator being resisted deterioration is higher, and is also higher for the detection requirement of insulator, not only will find the insulator of deterioration, and the insulator with hidden danger is in time found.For the charged detection of direct current electric transmission and transformation line insulator, also there is not a kind of good method at present.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of can be under charged situation, the voltage distribution situation of detection by quantitative various material insulator comparatively quickly in time, is accurately found the alternating current-direct current high-tension insulator passive type detector of insulator hidden danger.
The technical scheme that the present invention deals with problems is: a kind of alternating current-direct current high-tension insulator passive type detector, form by casing, left survey dish, right survey dish, measuring staff, measuring staff mounting flange and insulating bar, the measuring staff mounting flange is contained in the two ends of casing, measuring staff is fixed on the measuring staff mounting flange, left side survey dish and right survey dish also are installed in respectively on the measuring staff mounting flange of and arranged on left and right sides in casing, survey dish in a left side is parallel with right survey dish, at a distance of 40-60mm, in a left side survey dish insulator testing circuit plate is housed, have window on the left side survey dish, casing and measuring staff mounting flange are installed on the insulating bar.
Described insulator testing circuit plate is connected in series successively by sensitive element, direct current amplifier, wave filter, AC amplifier, rectifier, sampling thief, processor and transmitter and forms, and sensitive element is positioned at the window's position of left survey dish.
Described sensitive element is made up of battery lead plate, switch and insulation crust, and switch the two poles of the earth connect a battery lead plate respectively, and switch and battery lead plate are contained in the insulation crust.
During detection, detector is placed the electric field at insulator place, make passive generation voltage pressure reduction between two measuring staffs of detector, by sensitive element signal is carried out original collection, through direct current amplification, filtering and exchange amplify obtain can complete identification signal, after rectification, signal is sent into sampling thief analyzes classification, and handle by processor, then by transmitter to the data transmission after handling in ground receiving trap.
The present invention can be under charged situation, and the voltage distribution situation of detection by quantitative insulator comparatively quickly fully, in time, is accurately found the hidden danger of insulator;
Use this device, not only can detect the insulator of stupalith, also can detect the insulator of media such as glass, synthetic material;
In addition, but ground is stored or be transmitted into to this detector synchronous acquisition related data, judging fast for the scene provides foundation, and can be aspects such as site work management, technical management, product design, IT application in enterprises in data analysis reliable foundation is provided.
The invention solves the difficult problem of insulator charged detection by quantitative, especially solved the difficult problem of the charged detection by quantitative of direct current high tension transmission line insulator.
The present invention need not apply any influence to measurand when detecting, (as voltage, electric current, infrared ray, ultrasound wave etc.) just can conveniently detect;
High-precision charged detection by quantitative: this device is used the method for measuring voltage, captured the difficult problem of the insulator charged detection by quantitative of present direct current electric transmission and transformation net, its accuracy of detection can reach ± and 1%, the voltage that not only can accurately measure every insulator distributes, scent a hidden danger, can also carry out whole detection to insulator chain, have high measurement accuracy and high reliability (avoid omission and can on-the-spotly get rid of the query data);
But this device AC/DC.The method of traditional insulator charged detection can only be used for the qualitative detection of alternating current, detection by quantitative to D.C. isolation is current difficult point of not capturing fully, this detector is insulator to be carried out the distribution measuring of voltage, thereby obtains accurate data, quantitatively judges the electric leakage situation of insulator.The detection that has is the method that adopts pulse voltage, and the resistance value of its insulator will (even to 5-10 kilovolt) could accurately detect under very high voltage, can be subjected to the restriction of limited voltage.Because it is normal value that the insulator that has detects under situation about exchanging, but the detection under the situation of direct current has problems, and this is that the influence of measurement range and measuring accuracy causes.This detector can remedy insulator is applied the deficiency that pulse voltage is measured its insulating resistance value method, and the needs of detection by quantitative are all satisfied in the not restriction that can be pressurizeed on measurement range and measuring accuracy.
Table 1 is the comparison of the important technology index of this detector and other insulator pick-up unit
Table 1
| Index item | This detector | Domestic new instrument in recent years | The traditional detection instrument | The U.S. | Japan | Canada |
| The hum bar electro-detection | √ | √ | √ | √ | √ | √ |
| The charged detection of direct current | √ | √ | - | - | - | - |
| Accuracy of detection | ±1％ | ±10％ | Qualitative | Qualitative | Qualitative | Qualitative |
| The structure of device | Simply | Simply | - | - | - | - |
| Ease of use | Convenient | - | - | - | - | - |
| Automaticity | High | - | - | - | - | - |
| The storage of data | √ | √ | - | - | - | - |
| The instantaneous transmission of data | √ | - | - | - | - | - |
In the table: "-" representative is not.
Description of drawings
Fig. 1 is the invention structural representation
Fig. 2 is the right view of Fig. 1
Fig. 3 is a circuit board block diagram of the present invention
Fig. 4 detects synoptic diagram for insulator
Fig. 5 is the invention circuit theory diagrams
Embodiment
As Fig. 1, shown in 2, a kind of alternating current-direct current high-tension insulator passive type detector, by casing 4, left side survey dish 3, right survey dish 5, measuring staff 1, measuring staff mounting flange 2 and insulating bar 6 are formed, casing 4 is a cylindrical shape, the measuring staff mounting flange is contained in the two ends of casing 4, measuring staff 1 is fixed on the measuring staff mounting flange 2, a left side survey dish 3 and right survey dish 5 casing 4 in and branch be installed in a left side in addition, on the measuring staff mounting flange of right both sides, it is 5 parallel that left side survey dish 3 and right survey are coiled, at a distance of 40-60mm, in the left side survey dish 3 insulator testing circuit plate 7 is housed, left survey dish 3 usefulness metallic conduction materials are made, and the intermediate portion has a window 8; Right survey dish 5 is the metallic circular discs, and casing 4 is the right cylinder of hollow, and the flange at casing and its two ends is installed on the insulating bar 6 by bolt.
Shown in Fig. 3,5, testing circuit is connected in series successively by sensitive element 9, direct current amplifier 10, wave filter 11, AC amplifier 12, rectifier 13, sampling thief 14, processor 15 and transmitter 16 and forms, sensitive element 9 is positioned at the position of the window 8 of left survey dish, battery lead plate 18, switch 20 and insulation crust 19 by 3 blocks of metal materials are formed, switch the two poles of the earth connect a battery lead plate respectively, and switch and battery lead plate are contained in the insulation crust; Another electrode plate links to each other with direct current amplification appliance 10, the 17 foot control system sensitive elements 9 of the CPU of processor and sampling thief.Power supply 17 is the 3.6V lithium battery, for detector provides sustainable working power.
During detection, detector is placed the electric field at insulator place, make passive generation voltage pressure reduction between two measuring staffs of detector, make electric field even. by sensitive element signal is carried out original collection, through direct current amplification, filtering and exchange amplify obtain can complete identification signal, after rectification, signal is sent into sampling thief analyzes classification, and handle by processor, then by transmitter to the data transmission after handling in ground receiving trap.Survey dish in a left side is parallel with right survey dish, at a distance of 40-60mm, makes electric field even.
As shown in Figure 4, for insulator detects synoptic diagram, reflected the quantitative and distribution situation of insulator chain voltage, wherein No. 4 insulator produced hidden danger.
Claims (3)
1, a kind of alternating current-direct current high-tension insulator passive type detector, it is characterized in that described detector is made up of casing, left survey dish, right survey dish, measuring staff, measuring staff mounting flange and insulating bar, the measuring staff mounting flange is contained in the two ends of casing, measuring staff is fixed on the measuring staff mounting flange, left side survey dish and right survey dish also are installed in respectively on the measuring staff mounting flange of and arranged on left and right sides in casing, survey dish in a left side is parallel with right survey dish, at a distance of 40-60mm, in a left side survey dish insulator testing circuit plate is housed, have window on the left side survey dish, casing and measuring staff mounting flange are installed on the insulating bar.
2, detector as claimed in claim 1, it is characterized in that described insulator testing circuit plate is connected in series successively by sensitive element, direct current amplifier, wave filter, AC amplifier, rectifier, sampling thief, processor and transmitter forms, and sensitive element is positioned at the window's position of left survey dish.
3, detector as claimed in claim 2 is characterized in that described sensitive element is made up of battery lead plate, switch and insulation crust, and switch the two poles of the earth connect a battery lead plate respectively, and switch and battery lead plate are contained in the insulation crust.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100134106A CN100356181C (en) | 2004-07-02 | 2004-07-02 | AC-DC high-voltage insulator passive tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100134106A CN100356181C (en) | 2004-07-02 | 2004-07-02 | AC-DC high-voltage insulator passive tester |
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| Publication Number | Publication Date |
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| CN1657962A CN1657962A (en) | 2005-08-24 |
| CN100356181C true CN100356181C (en) | 2007-12-19 |
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| CNB2004100134106A Expired - Fee Related CN100356181C (en) | 2004-07-02 | 2004-07-02 | AC-DC high-voltage insulator passive tester |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104931800A (en) * | 2015-05-25 | 2015-09-23 | 国家电网公司 | Electric field measurement device for insulator string inspection robots |
| CN104950179A (en) * | 2015-05-25 | 2015-09-30 | 国家电网公司 | Insulation resistance measuring device for insulator string detection robot |
| CN108931710A (en) * | 2017-05-24 | 2018-12-04 | 句容市福润电气有限公司 | A kind of post insulator style sensor |
| CN113567885B (en) * | 2021-07-22 | 2023-05-16 | 广东电网有限责任公司 | Ground wire insulator fault early warning device and early warning method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1057240A (en) * | 1964-12-22 | 1967-02-01 | Ass Elect Ind | Improved arrangement for testing high voltage insulators |
| GB1208642A (en) * | 1967-08-17 | 1970-10-14 | Kronprinz Ag | Means for selectively indicating a pylon where insulator failure has occurred |
| JPS599569A (en) * | 1982-07-07 | 1984-01-18 | Kyushu Denki Kensetsu Koji Kk | Method and apparatus for detecting bad insulator |
| CA1177536A (en) * | 1983-01-28 | 1984-11-06 | Michel G. Drouet | Detection and localization of electrical faults and partial discharges |
| US4760343A (en) * | 1986-03-17 | 1988-07-26 | Hydro-Quebec | Apparatus for detecting defective insulators in an insulating column supporting an electrical conductor in a power circuit line |
| EP0621489A2 (en) * | 1993-03-24 | 1994-10-26 | Schneider Electric Sa | Partial discharge detecting device for electric high voltage appliance |
| US5416420A (en) * | 1993-12-13 | 1995-05-16 | Hydro-Quebec | Method and apparatus for the verification of an electrical insulator device based on the analysis of the electric field along the insulator |
| CN2773706Y (en) * | 2004-07-02 | 2006-04-19 | 武汉奋进电力技术有限公司 | A/DC high-voltage insulator passive inspector |
-
2004
- 2004-07-02 CN CNB2004100134106A patent/CN100356181C/en not_active Expired - Fee Related
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1057240A (en) * | 1964-12-22 | 1967-02-01 | Ass Elect Ind | Improved arrangement for testing high voltage insulators |
| GB1208642A (en) * | 1967-08-17 | 1970-10-14 | Kronprinz Ag | Means for selectively indicating a pylon where insulator failure has occurred |
| JPS599569A (en) * | 1982-07-07 | 1984-01-18 | Kyushu Denki Kensetsu Koji Kk | Method and apparatus for detecting bad insulator |
| CA1177536A (en) * | 1983-01-28 | 1984-11-06 | Michel G. Drouet | Detection and localization of electrical faults and partial discharges |
| US4760343A (en) * | 1986-03-17 | 1988-07-26 | Hydro-Quebec | Apparatus for detecting defective insulators in an insulating column supporting an electrical conductor in a power circuit line |
| EP0621489A2 (en) * | 1993-03-24 | 1994-10-26 | Schneider Electric Sa | Partial discharge detecting device for electric high voltage appliance |
| US5416420A (en) * | 1993-12-13 | 1995-05-16 | Hydro-Quebec | Method and apparatus for the verification of an electrical insulator device based on the analysis of the electric field along the insulator |
| CN2773706Y (en) * | 2004-07-02 | 2006-04-19 | 武汉奋进电力技术有限公司 | A/DC high-voltage insulator passive inspector |
Non-Patent Citations (3)
| Title |
|---|
| 地面检测线路不良绝缘子装置的研制 程养春，李成榕，郭琳，黄兴泉.高电压技术，第25卷第3期 1999 * |
| 电场法带电检测零值绝缘子的研究 程养春，李成榕，马晓华.高电压技术，第28卷第120期 2002 * |
| 高压输电线绝缘子的带电检测 刘伟平.供用电，第13卷第1期 1996 * |
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