CN104360245A - Gap discharge characteristic test platform influenced by multiple factors under simulated mountain fire condition - Google Patents
Gap discharge characteristic test platform influenced by multiple factors under simulated mountain fire condition Download PDFInfo
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- CN104360245A CN104360245A CN201410651007.XA CN201410651007A CN104360245A CN 104360245 A CN104360245 A CN 104360245A CN 201410651007 A CN201410651007 A CN 201410651007A CN 104360245 A CN104360245 A CN 104360245A
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Abstract
The invention discloses a gap discharge characteristic test platform influenced by multiple factors under the simulated mountain fire condition. The test platform is used for simulating the practical environment of a transmission line corridor so as to obtain the breakdown characteristics of a gap under different combustion conditions, and quantitative research is further carried out on a tripping mechanism of a power transmission line under the mountain fire condition. The test platform comprises a test power source, a water resistor, a voltage divider and a sealed laboratory. A first electrode, a second electrode, a heat insulation plate, a resistor box, a weight sensor, a DV camera, a high-speed camera, an infrared thermometer, a fan, a particular generator and a signal collecting system are arranged in the sealed laboratory. By means of the gap discharge characteristic test platform influenced by the multiple factors under the simulated mountain fire condition, contrast tests of the gap under different combustion conditions can be carried out conveniently, the problem that the test factors of an existing test platform are single is solved well, and the quantitative research of the breakdown characteristics of the gap under the mountain fire condition is possible. The test platform is easy to operate, high in adaptability and capable of meeting the design requirement.
Description
Technical field
The invention belongs to electrical engineering technical field, particularly a kind of gap discharge attribute testing platform of simulating multifactor impact under mountain fire condition.
Background technology
Along with the fast development of China's economy, electricity needs continues strong growth, has promoted investment and the construction of China's electrical network facilities.A large amount of construction of transmission line of electricity make the nervous situation in electric power corridor increasingly serious, and thus the corridor of many transmission lines of electricity is forced to build in the luxuriant remote mountains of vegetation, and these areas inevitably mountain fire occur.The particularly impact of extreme weather in recent years, and burn the grass on waste land, the custom such as sacrifice is prevailing, the accident making transmission line of electricity cause massive blackout because mountain fire tripping operation gets more and more, and has a strong impact on the safe and stable operation of electrical network, the heavy losses to national economy band.
In order to propose effective monitoring and control mountain fire initiation transmission line of electricity tripping operation measure; Chinese scholars has carried out lot of experiments and theoretical analysis; under finding mountain fire condition, transmission line of electricity tripping operation mainly rolls up relevant with flame high temperature, high conductivity and particle ashes; but be still in the qualitative examination stage at present, there is no clear and definite systematic research conclusion.So set up multifactor mountain fire test platform, under research Different factor, the flash-over characteristic in gap is significant; Existing mountain fire test platform influence factor is too single, for some important factor in order as particle, wind speed, intensity of a fire intensity etc. cannot effectively be carried out, there is no effective data acquisition and analysis system simultaneously, cannot obtain comprehensive system, quantitative research conclusion; In order to go deep into transmission line of electricity tripping operation mechanism under quantitative examination mountain fire condition, propose gap discharge attribute testing platform under a kind of mountain fire condition of multifactor fusion, can simulate power transmission line corridor actual motion environment based on this test platform, the gap breakdown characteristic under different affecting factors can be obtained, under mountain fire condition, the tripping operation mechanism of transmission line of electricity provides data supporting.
Summary of the invention
The object of the invention is to for existing technical matters, a kind of gap discharge attribute testing platform of simulating multifactor impact under mountain fire condition is provided, utilize this platform under different influence factors, carry out wire-plate, the power frequency of rod plain gap under flame condition, the test of DC voltage breakdown characteristics, obtain the quantitative relationship between gap breakdown voltage and each influence factor, binding tests result and gas discharge theoretical analysis mountain fire cause transmission line of electricity tripping operation mechanism.
The technical solution adopted in the present invention is: a kind of gap discharge attribute testing platform of simulating multifactor impact under mountain fire condition, for simulating the actual environment of power transmission line corridor, thus obtain the breakdown characteristics of gap under different burning condition, and then quantitative examination is carried out to transmission line of electricity tripping operation mechanism under mountain fire condition; It is characterized in that: comprise experiment power supply, water resistance, voltage divider and airtight laboratory, described airtight laboratory internal is provided with the first electrode, the second electrode, heat-insulating shield, resistance box, weight sensor, digital camera DV, high-speed camera, infrared thermometer, fan, particle generator and signal acquiring system; Described experiment power supply is for generation of power frequency or DC voltage; The change of quality and then the reaction intensity of a fire intensity when described weight sensor is for monitoring vegetation combustible combustion; Described digital camera DV and high-speed camera are used for observing and recording whole combustion process and discharge process; Described fan is used for Adjustment Tests ambient wind velocity; Described particle generator is for changing dust concentration between gap; Described infrared thermometer is for monitoring flame temperature and electrode temperature; Described resistance box is used for the collection of leakage current signal; Described signal acquiring system is used for monitoring and preserve combustible mass, leakage current and voltage signal simultaneously; Described experiment power supply, water resistance, voltage divider, the first electrode and the second electrode are composed in series successively; The second described electrode is arranged in described airtight laboratory on lower bottom part, and vegetation combustible is positioned over the centre of the second described electrode, and described weight sensor is arranged in the second described base part, utilizes described heat-insulating shield to separate between the two; The extension line of the second described electrode is connected to described resistance box; Described vegetation combustible while be provided with digital camera DV and high-speed camera, another side is provided with infrared thermometer, fan and particle generator, the first described electrode and be reserved with enough safe distances between digital camera DV, high-speed camera, infrared thermometer, fan and particle generator; The output terminal of the described output terminal of voltage divider low-pressure side, the output terminal of resistance box and weight sensor is all connected to described signal acquiring system, and the signal that described signal acquiring system is used for gathering carries out real-time analysis process.
As preferably, described high-speed camera is also configured with filter, and described filter is that narrow wavestrip leads to optical filtering, can weaken the impact of flame light, for the observation of high-speed camera to arc path development in flame during gap breakdown.
As preferably, the first described electrode is high pressure bar electrode or high-voltage conducting wires electrode, and the second described electrode is grounded plate electrode.
As preferably, described fan arrangement has wind gage, for measuring wind speed.
As preferably, described weight sensor is four, is arranged on four angles of described heat-insulating shield respectively, for gathering the situation of change of vegetation combustible combustion process weight.
As preferably, four weight sensors are through shielded cable, access four-in-one transmitter, transmitter is added four road weight signals, amplify rear input NI data collecting card, after NI data collecting card converts weight signal, leakage current signal and divider voltage signal to digital quantity by analog quantity, through the signal acquiring system described in transmission cable input.
The invention has the beneficial effects as follows:
1), this platform operations is simple, easy to use;
2), this platform can facilitate, carry out different burning condition all sidedly under contrast test, can mass data be obtained, under mountain fire condition, transmission line of electricity tripping operation mechanism provides Data support;
3) this test platform, is utilized, continuously, effectively can obtain the voltage signal of gap discharge process, leakage current signal and vegetation weight change signal, the flame temperature of gap breakdown process and the particle of metamorphosis, arc path development and vegetation combustion process and ashes situation can also be obtained, the acquisition of these data, can be the discharge mechanism in gap and the foundation of model under mountain fire condition and provides data supporting.
Accompanying drawing explanation
Fig. 1: be the test platform schematic diagram of the embodiment of the present invention.
Fig. 2: be the weight sensor arrangenent diagram of the embodiment of the present invention.
Fig. 3: be the signal acquiring system schematic diagram of the embodiment of the present invention.
Embodiment
Understand for the ease of those of ordinary skill in the art and implement the present invention, below in conjunction with drawings and Examples, the present invention is described in further detail, should be appreciated that exemplifying embodiment described herein is only for instruction and explanation of the present invention, is not intended to limit the present invention.
Refer to Fig. 1, Fig. 2 and Fig. 3, the technical solution adopted in the present invention is: a kind of gap discharge attribute testing platform of simulating multifactor impact under mountain fire condition, for simulating the actual environment of power transmission line corridor, thus obtain the breakdown characteristics of gap under different burning condition, and then quantitative examination is carried out to transmission line of electricity tripping operation mechanism under mountain fire condition; Comprise experiment power supply 14, water resistance 15, voltage divider 16 and airtight laboratory 1, described inside, airtight laboratory 1 is provided with high-voltage conducting wires electrode 2, grounded plate electrode 4, heat-insulating shield 5, resistance box 6, weight sensor 7, digital camera DV8, filter 9, high-speed camera 10, infrared thermometer 11, fan 12, particle generator 13, wind gage and signal acquiring system.
Experimental power supply 14 capacity in the present embodiment is 250 kVA, can produce the power-frequency voltage of the highest 250kV and the DC voltage of the highest 350 kV; Water resistance 15 resistance is 10 k Ω; Voltage divider 16 is capacitance-resistance structure, and no-load voltage ratio is 5000:1; Electrode comprises high-voltage conducting wires electrode 2, grounded plate electrode 4, and wherein lead electrode 2 is stainless-steel pipe, and steel pipe is long is 1m, and diameter is 2cm, and two ends are the voltage equalizing ball of 10cm with diameter, and grounded plate electrode 4 is 1 × 1m
2iron plate; Weight sensor 7 is S type pressure transducer, and range is 0 ~ 50kg, and 4 weight sensors can be measured below 200kg vegetation weight, and transmitter enlargement factor is 10 times, and its output voltage is 0 ~ 10V; Digital camera DV8 model is Sony HDR-CX580E, can make a video recording continuously more than one hour; Infrared thermometer 11 model is VST-H, can take continuously flame body and electrode temperature; High-speed camera 10 model is S-PRI F2, and its resolution is 1280 × 1024, and frame number can reach 500 frames/second.Fan 12 can produce the wind speed of 3 different brackets; Vegetation is burnt after ashes pulverize by particle generator 13, can be blown into gap, thus obtain flue dust and the particle of variable concentrations with 3 kinds of friction speeds.
The NI-6210 capture card that signal acquiring system is produced by Shanghai En Ai company and Labview software systems form jointly, input reference signal be-10 ~ 10V, Ke Dui 16 road signal carry out synchronous acquisition;
Experiment power supply 14, water resistance 15, voltage divider 16, lead electrode 2 and grounded plate electrode 4 are connected successively, in experiment power supply 14, the input voltage of pressure regulator is 380V, its output terminal is connected through the high-pressure side of water resistance 15 with voltage divider 16, the high-pressure side of voltage divider 16 accesses airtight laboratory 1, be connected with lead electrode 2, lead electrode 2 is by rope suspensions on the back timber in airtight laboratory 1, and lead electrode 2 can utilize rope to carry out free adjustment with the distance of grounded plate electrode 4; Grounded plate electrode 4 to be arranged in airtight laboratory 1 on lower bottom part, vegetation combustible 3 is positioned over the centre of described grounded plate electrode 4, four weight sensors 7 are arranged in below grounded plate electrode 4 respectively, heat-insulating shield 5 is utilized to separate between the two, for gathering the situation of change of grillage combustion process weight; The extension line of grounded plate electrode 4 is connected to resistance box 6, for gathering leakage current signal; Vegetation combustible 3 while be provided with digital camera DV8 and high-speed camera 10, another side is provided with infrared thermometer 11, fan 12 and particle generator 13, lead electrode 2 and be reserved with enough safe distances between digital camera DV8, high-speed camera 10, infrared thermometer 11, fan 12 and particle generator 13; High-speed camera 10 is also configured with filter 9, and filter 9 leads to optical filtering for narrow wavestrip, can weaken the impact of flame light, for the observation of arc path development in flame during high-speed camera 10 pairs of gap breakdowns; Fan 12 is configured with wind gage, for measuring wind speed; Infrared thermometer 11 is for monitoring the change of burning pressure process flame temperature and electrode temperature; Fan 12 is for the impact of simulated environment wind speed on gap breakdown characteristic under mountain fire condition, and can produce the wind speed of three kinds of different brackets, actual wind speed size utilizes wind gage to measure; Vegetation is burnt after ashes pulverize by particle generator 13, three kinds of different speed can be blown into gap, for changing dust concentration between gap, simulates the breakdown characteristics in gap under different dust concentration;
Asking for an interview Fig. 3, is the signal acquiring system of the present embodiment, and four weight sensors 7 are through shielded cable, and access four-in-one transmitter, transmitter is added four road weight signals, amplify rear input NI data collecting card, after NI data collecting card converts weight signal, leakage current signal and divider voltage signal to digital quantity by analog quantity, through transmission cable input Labview signal acquiring system, frequency acquisition can adjust as required, this example is set to 1000Hz, and signal acquiring system Ke Dui tri-road signal carries out Real-Time Monitoring, for vegetation combustible kind, intensity of a fire intensity, gap length, electrode type, dust concentration, the factors such as inorganic salt content and wind speed size, adopt single factors test method(s), the ambient temperature and humidity of record gap breakdown process under different affecting factors, gap infrared temperature image, flame forms and height, dust concentration, wind speed, vegetation weight, voltage breakdown, the parameters such as leakage current and electric arc evolution, comprehensive analysis is under different burning condition, the flash-over characteristic in flame gap, obtain gap alternating current-direct current breakdown characteristics model under mountain fire condition, for under systematic analysis mountain fire condition, transmission line of electricity tripping operation mechanism provides support, the control and the monitoring that finally can be mountain fire provide theory support.
Principle of work of the present invention is: experiment power supply 14 provides power frequency or DC voltage, and output voltage is successively through water resistance 15, voltage divider 16, high-field electrode 2(rod or wire) and grounded plate electrode 4; Water resistance 15 plays current-limiting protection loop, and the high pressure of input is reduced to through certain no-load voltage ratio by voltage divider 16 can the voltage signal of input signal acquisition system; The high-pressure side of voltage divider 16 is connected to high-field electrode 2, and the clearance distance between high-field electrode 2 and grounded plate electrode 4 can adjust as required; Once the magnitude of voltage between gap exceedes its flashover voltage, gap just can puncture.Period utilizes digital camera DV8 to observe the production of flame forms change and particle and ashes; High-speed camera 10 and filter 9 is utilized to observe the path change of flame gap breakdown process electric arc; Infrared thermometer 11 is utilized to monitor flame temperature and electrode temperature change; Vegetation combustible 3 combustion process weight signal is converted to voltage signal and merges after amplification through transmitter by weight sensor 7, input NI data collecting card, the change of reflection vegetation combustion process intensity of a fire intensity; Resistance box 6 is utilized to gather the situation of change of leakage current before and after gap breakdown; After weight signal, leakage current and divider voltage signal convert analog quantity to digital quantity by NI data collecting card, through transmission cable input Labview signal acquiring system.Adopt single factors test method(s), by changing distance, the dust concentration between the kind of vegetation combustible 3 and area, electrode shape, combustion intensity, gap, wind speed, inorganic salt content etc. carry out the flash-over characteristic in gap under quantitative test different affecting factors; The voltage breakdown in research gap and flame temperature, flame height, intensity of a fire intensity, dust concentration, wind speed, the isoparametric relation of inorganic salt content, gap discharge characteristic model under acquisition mountain fire condition, the tripping operation mechanism of transmission line of electricity under systematic analysis mountain fire condition.
The present invention can carry out the contrast test of gap under different burning condition easily, compensate for the problem that current test platform experimental factor is too single well, under mountain fire condition, the quantitative examination of gap breakdown characteristic improves possibility; This platform operations is simple, and applicability is strong, meets the requirement of design.
Although this instructions more employs the terms such as airtight laboratory 1, high-voltage conducting wires electrode 2, grounded plate electrode 4, heat-insulating shield 5, resistance box 6, weight sensor 7, digital camera DV8, filter 9, high-speed camera 10, infrared thermometer 11, fan 12, particle generator 13, experimental power supply 14, water resistance 15, voltage divider 16, wind gage and signal acquiring system, do not get rid of the possibility using other terms.Use these terms to be only used to describe essence of the present invention more easily, the restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Should be understood that, the part that this instructions does not elaborate all belongs to prior art.
Should be understood that; the above-mentioned description for preferred embodiment is comparatively detailed; therefore the restriction to scope of patent protection of the present invention can not be thought; those of ordinary skill in the art is under enlightenment of the present invention; do not departing under the ambit that the claims in the present invention protect; can also make and replacing or distortion, all fall within protection scope of the present invention, request protection domain of the present invention should be as the criterion with claims.
Claims (6)
1. simulate the gap discharge attribute testing platform of multifactor impact under mountain fire condition for one kind, for simulating the actual environment of power transmission line corridor, thus obtain the breakdown characteristics of gap under different burning condition, and then quantitative examination is carried out to transmission line of electricity tripping operation mechanism under mountain fire condition; It is characterized in that: comprise experiment power supply (14), water resistance (15), voltage divider (16) and airtight laboratory (1), described airtight laboratory (1) inside is provided with the first electrode (2), the second electrode (4), heat-insulating shield (5), resistance box (6), weight sensor (7), digital camera DV(8), high-speed camera (10), infrared thermometer (11), fan (12), particle generator (13) and signal acquiring system; Described experiment power supply (14) is for generation of power frequency or DC voltage; Described weight sensor (7) is for monitoring change and then the reaction intensity of a fire intensity of quality when vegetation combustible (3) burns; Described digital camera DV(8) and high-speed camera (10) for observe and record whole combustion process and discharge process; Described fan (12) is for Adjustment Tests ambient wind velocity; Described particle generator (13) is for changing dust concentration between gap; Described infrared thermometer (11) is for monitoring flame temperature and electrode temperature; Described resistance box (6) is for the collection of leakage current signal; Described signal acquiring system is used for monitoring and preserve combustible mass, leakage current and voltage signal simultaneously;
Described experiment power supply (14), water resistance (15), voltage divider (16), the first electrode (2) and the second electrode (4) are composed in series successively;
Described the second electrode (4) is arranged on described airtight laboratory (1) interior lower bottom part, vegetation combustible (3) is positioned over the centre of described the second electrode (4), described weight sensor (7) is arranged in described the second electrode (4) below, utilizes described heat-insulating shield (5) to separate between the two; The extension line of described the second electrode (4) is connected to described resistance box (6); Described vegetation combustible (3) is while be provided with digital camera DV(8) and high-speed camera (10), another side be provided with infrared thermometer (11), fan (12) and particle generator (13), described the first electrode (2) and digital camera DV(8), be reserved with enough safe distances between high-speed camera (10), infrared thermometer (11), fan (12) and particle generator (13);
The output terminal of the output terminal of described voltage divider (16) low-pressure side, the output terminal of resistance box (6) and weight sensor (7) is all connected to described signal acquiring system, and the signal that described signal acquiring system is used for gathering carries out real-time analysis process.
2. the gap discharge attribute testing platform of multifactor impact under simulation mountain fire condition according to claim 1, it is characterized in that: described high-speed camera (10) is also configured with filter (9), described filter (9) leads to optical filtering for narrow wavestrip, the impact of flame light can be weakened, for the observation of high-speed camera (10) to arc path development in flame during gap breakdown.
3. the gap discharge attribute testing platform of multifactor impact under simulation mountain fire condition according to claim 1, is characterized in that: described the first electrode (2) is high pressure bar electrode or high-voltage conducting wires electrode, and described the second electrode (4) is grounded plate electrode.
4. the gap discharge attribute testing platform of multifactor impact under simulation mountain fire condition according to claim 1, is characterized in that: described fan (12) is configured with wind gage, for measuring wind speed.
5. the gap discharge attribute testing platform of multifactor impact under the simulation mountain fire condition according to claim 1,2,3 or 4, it is characterized in that: described weight sensor (7) is four, be arranged on four angles of described heat-insulating shield (5) respectively, for gathering the situation of change of vegetation combustible (3) combustion process weight.
6. the gap discharge attribute testing platform of multifactor impact under simulation mountain fire condition according to claim 5, it is characterized in that: four weight sensors (7) are through shielded cable, access four-in-one transmitter, transmitter is added four road weight signals, amplify rear input NI data collecting card, after NI data collecting card converts weight signal, leakage current signal and divider voltage signal to digital quantity by analog quantity, through the signal acquiring system described in transmission cable input.
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| CN109254234A (en) * | 2018-11-22 | 2019-01-22 | 云南电网有限责任公司红河供电局 | A kind of trees-wire electrical discharge simulation experiment method |
| CN109342897A (en) * | 2018-11-06 | 2019-02-15 | 南京工业大学 | Small-sized mountain fire induces the electric discharge of ultra-high-tension power transmission line flashover and its early warning simulator |
| CN109444563A (en) * | 2018-11-06 | 2019-03-08 | 三峡大学 | The charged test platform of vegetation burning particles object under a kind of transmission line simulation electric field |
| CN110501571A (en) * | 2019-07-24 | 2019-11-26 | 武汉大学 | Passage of flame local conductivity real-time monitoring device |
| CN110940899A (en) * | 2019-11-22 | 2020-03-31 | 清华大学深圳国际研究生院 | Air gap discharge shooting device, path identification method, computer and medium |
| CN113625089A (en) * | 2021-08-17 | 2021-11-09 | 中国科学技术大学 | Fault arc ignition experimental device and experimental method thereof |
| CN114234940A (en) * | 2021-12-16 | 2022-03-25 | 国网四川省电力公司电力科学研究院 | System and method for measuring tree line discharge basic data of high-voltage power line |
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| CN109239549A (en) * | 2018-08-31 | 2019-01-18 | 国网湖南省电力有限公司 | The experimental rig and application method of transmission line of electricity and mountain fire interaction can be decoupled |
| CN109342897B (en) * | 2018-11-06 | 2023-09-01 | 南京工业大学 | Small mountain fire-induced high-voltage transmission line flashover discharge and early warning simulation device thereof |
| CN109342897A (en) * | 2018-11-06 | 2019-02-15 | 南京工业大学 | Small-sized mountain fire induces the electric discharge of ultra-high-tension power transmission line flashover and its early warning simulator |
| CN109444563A (en) * | 2018-11-06 | 2019-03-08 | 三峡大学 | The charged test platform of vegetation burning particles object under a kind of transmission line simulation electric field |
| CN109254234A (en) * | 2018-11-22 | 2019-01-22 | 云南电网有限责任公司红河供电局 | A kind of trees-wire electrical discharge simulation experiment method |
| CN110501571A (en) * | 2019-07-24 | 2019-11-26 | 武汉大学 | Passage of flame local conductivity real-time monitoring device |
| CN110940899B (en) * | 2019-11-22 | 2022-04-01 | 清华大学深圳国际研究生院 | Air gap discharge shooting device, path identification method, computer and medium |
| CN110940899A (en) * | 2019-11-22 | 2020-03-31 | 清华大学深圳国际研究生院 | Air gap discharge shooting device, path identification method, computer and medium |
| CN113625089A (en) * | 2021-08-17 | 2021-11-09 | 中国科学技术大学 | Fault arc ignition experimental device and experimental method thereof |
| CN113625089B (en) * | 2021-08-17 | 2023-11-28 | 中国科学技术大学 | Fault arc ignition experimental device and experimental method thereof |
| CN114234940A (en) * | 2021-12-16 | 2022-03-25 | 国网四川省电力公司电力科学研究院 | System and method for measuring tree line discharge basic data of high-voltage power line |
| CN114234940B (en) * | 2021-12-16 | 2023-08-15 | 国网四川省电力公司电力科学研究院 | Measurement system and method for tree line discharge basic data of high-voltage power line |
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