CN102650667A - Method for detecting metal particles in GIS (Gas Insulated Switchgear) based on triangular wave high voltage - Google Patents
Method for detecting metal particles in GIS (Gas Insulated Switchgear) based on triangular wave high voltage Download PDFInfo
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Abstract
A method for detecting metal particles in a GIS (Gas Insulated Switchgear) based on triangular wave high voltage is characterized by comprising the steps as follows: artificial metal defects are arranged in the GIS; the triangular wave peak voltage is preset, and the vibration signal level is measured when the particles are static; the input time of the low voltage terminal of a voltage regulator is controlled through a voltage regulating timing control device; and before a test is finished, the positive and the negative polarities of triangular wave high voltage are required to be applied to a GIS high-voltage conductor alternately to eliminate the influence of residual electricity of DC voltage. The method has the remarkable advantages that the structure is compact and small, the transportation and the debugging are easy, the output voltage is uniform, the sensitivity is high, and the like.
Description
Technical field
The invention belongs to GIS class insulation of electrical installation detection technique field, be particularly useful for GIS kind equipment interior metal particle defects and detect.
Background technology
SF among the GIS
6Gas is strong negative gas, has excellent arc extinguishing ability, and its compact conformation, is widely used in electric system.The manufacturing firm of GIS usually thinks that GIS is non-maintaining product, can move 10 years, even 30 years.But in the electric system actual moving process, it is doubtful to find that GIS does not have the insulating property with very good performance, especially GIS that manufacturer declares.Thereby vast electric system researcher is devoted for years in the research of GIS D.C. isolation detection technique, has studied the partial discharge phenomenon that industrial-frequency alternating current is depressed the GIS insulation defect, and method commonly used mainly is pulse current method, ultrasonic method and ultrahigh frequency method.These methods have higher sensitivity for the detection of some specified defect.And shelf depreciation collection of illustrative plates (PRPD, Phase Resolved Partial Discharge) commonly used has also obtained a lot of useful effects.
Yet the detection for metal particle of these methods is under the alternating voltage for a long time, and its alternating voltage makes metal particle can't obtain peak acceleration, thereby its motion oscillations amplitude is lower, is unfavorable for detecting metal particle.Under the alternating voltage; Particulate the bigger motion height that will obtain; Must apply relative higher voltage at the GIS high-pressure conductor; But the particulate take-off probably causes the GIS flashover, thereby adopts the rising alternating voltage to reach and obtain the higher vibration of particulate method highly, is easy to make GIS that destructive the damage taken place.
And metal particle is lower than alternating voltage under the DC voltage; And the ac test power volume is huge; Be unfavorable for the test of long-distance carrying and high altitude localities, DC voltage can be so that particulate obtains maximum acceleration and speed, and commencing height is higher relatively; Thereby the vibration amplitude of particulate under DC voltage is than high under the alternating voltage; Thereby can obtain the bigger vibration amplitude of particulate through lower DC voltage, and make that the detection of particulates technology has obtained good sensitivity under the DC voltage, help detection of particulates.
Based on above analysis, can know that the particle detection method that adopts under the DC voltage has very high sensitivity, and the DC voltage generator volume is little, portable performance is stronger, and employed DC voltage is relatively low, does not have destructiveness for the GIS test product.Thereby the present invention proposes to adopt GIS to apply the particle defects detection method under the DC voltage.
Summary of the invention
The objective of the invention is to solve the practical problems of metal particle defects detection dangerous in the GIS; Batch (-type) vibration level signal under main relatively positive polarity and the negative polarity triangular wave DC voltage; And vibration signal collection of illustrative plates track during particle movement, judge that whether GIS inside exists metal particle.
The present invention realizes through following technical proposal.
Based on metal particle detection method in the GIS of triangular wave high pressure; The present invention is at GIS (Gas Insulated Switchgear); Gas insulated combined electrical equipment) arranges artificial metal property defective in the GIS; At first apply and preset the triangular wave PV, obtain the vibration level signal of defective when static through vibration transducer; Be provided with at the pressure regulation time-controlling arrangement then and add the triangular wave peak value in advance, then through (for example 10s～40s), and then control pressure regulator high-pressure side output pressure regulation time-controlling arrangement control pressure regulator low pressure end pressure rising time; When arriving the triangular wave peak value; At once adjust back voltage output and reduce to no-voltage, so back and forth apply triangular wave at the GIS high-pressure side, this moment is along with triangle wave voltage back and forth fluctuates; The charged take-off of GIS interior metal particulate; And be presented in the different batch (-type) ultrasonic signal crowd of stationary state, and comprehensively compare the particle movement vibration level signal of stationary state and triangle wave voltage state, judge that there is situation in particulate.Preset the triangular wave PV, vibration level signal when the measurement particulate is static; Rubber hammer hammering GIS shell makes the inner particulate of GIS obtain initial velocity then, and this moment, positive polarity voltage made particulate move in the GIS inside cavity; The positive polarity voltage duration can decide along with particle size, and reversed polarity makes high voltage direct current generator produce the negative polarity DC voltage then; This moment, particulate was under positive polarity voltage effect in early stage; Particulate institute is positively charged along with the reverse voltage effect, and makes the particle movement track present retarded motion, but along with the particle collision high-pressure conductor; Positively charged constantly with particulate institute; And then the vibration signal that produces of particulate appears and begins the low high track state of rear portion batch (-type), and the signal level of comprehensive utilization vibration signal big or small and static and motion state is assessed particulate and whether existed and particle size.Through pressure regulation time-controlling arrangement control pressure regulator low pressure end input time; Setting voltage peak value not, the stationary state vibration signal is noise basically, and voltage raises; Metal particle is beated this moment at once; Vibration level signal that while monitoring vibration sensor obtains and particulate take-off this moment voltage, comprehensive assessment test of many times vibration level signal and particulate take-off voltage levvl judge that whether particulate exists and quantity.Before test finishes, need to adopt triangular wave high pressure positive-negative polarity alternately to be applied to the GIS high-pressure conductor, eliminate the influence of DC voltage residual charge.
The invention has the beneficial effects as follows:
A. compact conformation, be convenient to the transportation, be easy to control and the operation.
B. determination methods is simple;
Further set forth content of the present invention below in conjunction with accompanying drawing and instance.
Description of drawings
Fig. 1 is based on metal particle detection method synoptic diagram in the GIS of triangular wave high pressure;
Fig. 2 applies synoptic diagram (to 220kVGIS) based on metal particle detection method voltage in the GIS of triangular wave high pressure.
Among the figure: 1, pressure regulation time-controlling arrangement; 2, pressure regulator low pressure end; 3, pressure regulator high-pressure side; 4, pole changer; 5, lead; 6, dc generator low pressure end; 7, ground connection; 8, dc generator; 9, dc generator high-pressure side; 10, high-voltage connection; 11, bushing; 12, GIS; 13, high-pressure conductor, 14, ball particulate; 15, vibration transducer; 16, prime amplifier; 17, vibration signal processing terminal; 18, rubber hammer; 19, GIS shell; 20, triangular wave rising edge angle; 21, the positive polarity triangular wave duration; 22, the negative polarity triangular wave duration.
Embodiment
Based on metal particle detection method in the GIS of triangular wave high pressure, method of the present invention is:
(1) arranges artificial metal property defective in the GIS, at first apply and preset the triangular wave PV, obtain the vibration level signal of defective when static through vibration transducer; Be provided with at the pressure regulation time-controlling arrangement then and add the triangular wave peak value in advance, then through pressure regulation time-controlling arrangement control pressure regulator low pressure end pressure rising time (for example 10-40s), and then the output of control pressure regulator high-pressure side; When arriving the triangular wave peak value; At once adjust back voltage output and reduce to no-voltage, so back and forth apply triangular wave at the GIS high-pressure side, this moment is along with triangle wave voltage back and forth fluctuates; The charged take-off of GIS interior metal particulate; And be presented in the different batch (-type) ultrasonic signal crowd of stationary state, and comprehensively compare the particle movement vibration level signal of stationary state and triangle wave voltage state, judge that there is situation in particulate.
(2) preset the triangular wave PV, vibration level signal when the measurement particulate is static; Rubber hammer hammering GIS shell makes the inner particulate of GIS obtain initial velocity then, and this moment, positive polarity voltage made particulate move in the GIS inside cavity; The positive polarity voltage duration can decide along with particle size, and reversed polarity makes high voltage direct current generator produce the negative polarity DC voltage then; Particulate is under positive polarity voltage effect in early stage at this moment, and particulate institute is positively charged along with the reverse voltage effect, and makes the particle movement track present retarded motion; But along with the particle collision high-pressure conductor, positively charged with particulate institute in constantly, and then the vibration signal that produces of particulate appears and begins the low high track state of rear portion batch (-type); The signal level of comprehensive utilization vibration signal big or small and static and motion state; Whether the assessment particulate exists and particle size, and promptly vibration signal is big more or little, and particle size is big more or little; It is high more that vibration signal repeats frequency spectrum, and particle size is more little.
(3) through pressure regulation time-controlling arrangement control pressure regulator low pressure end input time; Setting voltage peak value not, the stationary state vibration signal is noise basically, and voltage raises; Metal particle is beated this moment at once; Vibration level signal that while monitoring vibration sensor obtains and particulate take-off this moment voltage, comprehensive assessment test of many times vibration level signal and particulate take-off voltage levvl judge that whether particulate exists and quantity.
(4) before test finishes, need to adopt triangular wave high pressure positive-negative polarity alternately to be applied to the GIS high-pressure conductor, eliminate the influence of DC voltage residual charge.
See Fig. 1, the figure shows based on metal particle detection method synoptic diagram in the GIS of triangular wave high pressure.Among the figure, 1 is the pressure regulation time-controlling arrangement, and this device mainly is used for controlling the DC voltage rising time, and then control pressure regulator voltage peak, and triangle wave voltage rising edge angle is directly confirmed in confirming of voltage rise time and voltage magnitude.4 is pole changer, is used for triangle wave voltage and turns to.At first through the 1 levelling triangle wave voltage rise time of pressure regulation time-controlling arrangement, pressure regulator low pressure end 2 input 220V low pressure are through pressure regulator high-pressure side 3 output high pressure; Through pole changer 4 control input voltage directions, pole changer 4 other ends are connected to DC voltage generator low pressure end 6 through lead 5, are connected to bushing 11 at DC voltage generator high-pressure side 9 through high-voltage connection 10; And then make high pressure understand that body 13 is charged, and ball particulate 14 is in GIS 12 inner bounce or jump phenomenons at this moment, and vibration transducer 15 obtains spherical particles 14 vibration signals takes place; Vibration signal carries out the signal processing and amplifying through prime amplifier 16; When if vibration signal does not obtain spherical particle 14 motion state signal between detection period, adopt rubber hammer 18 hammering GIS shells 19, and then obtain the particle movement signal; Finally carry out the signal comparative analysis through vibration signal processing terminal 17; Be of the fluctuations of GIS 12 inside along with triangle wave voltage, the step vibration signal of particle movement outlet, thereby there be get in touch relevant with voltage waveform in its motion; Through this relation and particle movement vibration signal size, assessment particle number and size.
See Fig. 2, the figure shows based on metal particle detection method voltage in the GIS of triangular wave high pressure and apply synoptic diagram.Shown the voltage waveform that GIS 12 high-pressure conductors 13 apply among the figure.20 is triangular wave rising edge angle in this waveform; This angle is steep more, and it is relatively large that particulate obtains electric field force, and is easy to overcome the effect of gravity and viscous force; And take-off; And then the vibration signal amplitude when obtaining motion state, it is big more to be still in motion state vibration signal difference, explains that more the possibility that particulate exists is big more.And the vibration signal time interval and vibration signal take place constantly with the voltage that applies correlativity is just arranged, and confirm that more there is metallic conducting particle in GIS inside.When testing experiment finished, the high pressure of 13 experience positive polarity triangular wave duration 21 of high-pressure conductor and positive polarity triangular wave duration 22 can be so that the influence of GIS 12 residual charges weakens or eliminates.
Claims (1)
1. based on metal particle detection method in the GIS of triangular wave high pressure, it is characterized in that this method is:
(1) arranges artificial metal property defective in the GIS, at first apply and preset the triangular wave PV, obtain the vibration level signal of defective when static through vibration transducer; Be provided with at the pressure regulation time-controlling arrangement then and add the triangular wave peak value in advance, then through pressure regulation time-controlling arrangement control pressure regulator low pressure end pressure rising time, and then the output of control pressure regulator high-pressure side; When arriving the triangular wave peak value; At once adjust back voltage output and reduce to no-voltage, so back and forth apply triangular wave at the GIS high-pressure side, this moment is along with triangle wave voltage back and forth fluctuates; The charged take-off of GIS interior metal particulate; And be presented in the different batch (-type) ultrasonic signal crowd of stationary state, and comprehensively compare the particle movement vibration level signal of stationary state and triangle wave voltage state, judge that there is situation in particulate;
(2) preset the triangular wave PV, vibration level signal when the measurement particulate is static; Rubber hammer hammering GIS shell makes the inner particulate of GIS obtain initial velocity then, and this moment, positive polarity voltage made particulate move in the GIS inside cavity; The positive polarity voltage duration can decide along with particle size, and reversed polarity makes high voltage direct current generator produce the negative polarity DC voltage then; Particulate is under positive polarity voltage effect in early stage at this moment, and particulate institute is positively charged along with the reverse voltage effect, and makes the particle movement track present retarded motion; But along with the particle collision high-pressure conductor, positively charged with particulate institute in constantly, and then the vibration signal that produces of particulate appears and begins the low high track state of rear portion batch (-type); The signal level of comprehensive utilization vibration signal big or small and static and motion state; Whether the assessment particulate exists and particle size, and promptly vibration signal is big more or little, and particle size is big more or little; It is high more that vibration signal repeats frequency spectrum, and particle size is more little;
(3) through pressure regulation time-controlling arrangement control pressure regulator low pressure end input time; Setting voltage peak value not, the stationary state vibration signal is noise basically, and voltage raises; Metal particle is beated this moment at once; Vibration level signal that while monitoring vibration sensor obtains and particulate take-off this moment voltage, comprehensive assessment test of many times vibration level signal and particulate take-off voltage levvl judge that whether particulate exists and quantity;
(4) before test finishes, need to adopt triangular wave high pressure positive-negative polarity alternately to be applied to the GIS high-pressure conductor, eliminate the influence of DC voltage residual charge.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102680574A (en) * | 2012-05-14 | 2012-09-19 | 云南电力试验研究院（集团）有限公司电力研究院 | GIS (Gas Insulated Switchgear) inner particle detecting method adopting polarity-reversal direct-current voltage |
| CN102928754A (en) * | 2012-11-15 | 2013-02-13 | 云南电力试验研究院（集团）有限公司电力研究院 | Initial movement device for triggering gas insulated switchgear (GIS) equipment defect in local discharge test for electricity |
| CN103605040A (en) * | 2013-11-04 | 2014-02-26 | 国家电网公司 | GIS-equipment built-in lightning-arrester alternating current leakage current test method |
| CN108919071A (en) * | 2018-06-12 | 2018-11-30 | 沈阳工业大学 | Metal particle three-dimensional motion form test measurement device and method under coaxial electrode |
| CN111426473A (en) * | 2020-05-19 | 2020-07-17 | 国网江苏省电力有限公司电力科学研究院 | GIS (gas insulated switchgear) equipment defect detection system and method by utilizing sweep frequency alternating current |
| CN111665421A (en) * | 2020-06-03 | 2020-09-15 | 西安交通大学 | Metal particle detection method for gas insulated substation |
| CN112052618A (en) * | 2020-07-31 | 2020-12-08 | 南方电网科学研究院有限责任公司 | Simulation method and device for free particle running track in GIS |
| CN112881871A (en) * | 2021-01-13 | 2021-06-01 | 国网宁夏电力有限公司电力科学研究院 | Detection method and detection system for metal particles in GIS equipment |
| CN113189452A (en) * | 2021-03-11 | 2021-07-30 | 西安交通大学 | GIS latent metal particle detection device based on external vibration excitation |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102680574A (en) * | 2012-05-14 | 2012-09-19 | 云南电力试验研究院（集团）有限公司电力研究院 | GIS (Gas Insulated Switchgear) inner particle detecting method adopting polarity-reversal direct-current voltage |
| CN102680574B (en) * | 2012-05-14 | 2014-11-26 | 云南电力试验研究院（集团）有限公司电力研究院 | GIS (Gas Insulated Switchgear) inner particle detecting method adopting polarity-reversal direct-current voltage |
| CN102928754A (en) * | 2012-11-15 | 2013-02-13 | 云南电力试验研究院（集团）有限公司电力研究院 | Initial movement device for triggering gas insulated switchgear (GIS) equipment defect in local discharge test for electricity |
| CN102928754B (en) * | 2012-11-15 | 2015-06-03 | 云南电力试验研究院（集团）有限公司电力研究院 | Initial movement device for triggering gas insulated switchgear (GIS) equipment defect in local discharge test for electricity |
| CN103605040A (en) * | 2013-11-04 | 2014-02-26 | 国家电网公司 | GIS-equipment built-in lightning-arrester alternating current leakage current test method |
| CN108919071A (en) * | 2018-06-12 | 2018-11-30 | 沈阳工业大学 | Metal particle three-dimensional motion form test measurement device and method under coaxial electrode |
| CN108919071B (en) * | 2018-06-12 | 2023-11-28 | 沈阳工业大学 | Device and method for testing and measuring three-dimensional movement morphology of metal particles under coaxial electrode |
| CN111426473B (en) * | 2020-05-19 | 2022-05-13 | 国网江苏省电力有限公司电力科学研究院 | GIS (gas insulated switchgear) equipment defect detection system and method by utilizing sweep frequency alternating current |
| CN111426473A (en) * | 2020-05-19 | 2020-07-17 | 国网江苏省电力有限公司电力科学研究院 | GIS (gas insulated switchgear) equipment defect detection system and method by utilizing sweep frequency alternating current |
| CN111665421B (en) * | 2020-06-03 | 2022-03-22 | 西安交通大学 | Metal particle detection method for gas insulated substation |
| CN111665421A (en) * | 2020-06-03 | 2020-09-15 | 西安交通大学 | Metal particle detection method for gas insulated substation |
| CN112052618A (en) * | 2020-07-31 | 2020-12-08 | 南方电网科学研究院有限责任公司 | Simulation method and device for free particle running track in GIS |
| CN112052618B (en) * | 2020-07-31 | 2024-04-26 | 南方电网科学研究院有限责任公司 | Simulation method and device for free particle running track in GIS |
| CN112881871A (en) * | 2021-01-13 | 2021-06-01 | 国网宁夏电力有限公司电力科学研究院 | Detection method and detection system for metal particles in GIS equipment |
| CN113189452A (en) * | 2021-03-11 | 2021-07-30 | 西安交通大学 | GIS latent metal particle detection device based on external vibration excitation |
| CN113189452B (en) * | 2021-03-11 | 2022-10-28 | 西安交通大学 | GIS latent metal particle detection device based on external vibration excitation |
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