CN104049189A - Device for detecting circuit phase earth and interphase interval discharge characteristic under simulation forest fire condition - Google Patents
Device for detecting circuit phase earth and interphase interval discharge characteristic under simulation forest fire condition Download PDFInfo
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- CN104049189A CN104049189A CN201410286235.1A CN201410286235A CN104049189A CN 104049189 A CN104049189 A CN 104049189A CN 201410286235 A CN201410286235 A CN 201410286235A CN 104049189 A CN104049189 A CN 104049189A
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Abstract
The invention provides a device for detecting the circuit phase earth and interphase interval discharge characteristic under a simulation forest fire condition. The device comprises a power transmission line simulation unit, a forest fire simulation unit, a measuring unit and a power supply unit. The power transmission line simulation unit is used for simulating the phase earth interval, the polar region interval, the interphase interval and the inter-pole interval of an AC and DC electric transmission line. The forest fire simulation unit is used for simulating forest fires. The measuring unit is used for measuring the form, the temperature, the leakage current and the discharge voltage of the flames of the forest fires. Compared with the prior art, the device for detecting the circuit phase earth and interphase interval discharge characteristic under the simulation forest fire condition is good in controllability of the temperature, the height, the diameter, the particulate matter content and the electrical conductivity of the flames of the forest fires, simple and convenient to operate, and capable of effectively overcoming the defects that detection data are large in dispersibility and poor in repeatability under the simulation forest fire condition.
Description
Technical field
The present invention relates to a kind of flash-over characteristic pick-up unit, be specifically related to a kind ofly simulate circuit phase under mountain fire condition and the pick-up unit of alternate gap discharge characteristic.
Background technology
The external insulation of overhead transmission line is using air as insulating medium, affected by atmospheric conditions, as wind, rain, thunder and lightning, snow etc. often cause circuit external insulation to lose efficacy and trip, these faults that trip generally occur in the position such as tower head or insulator chain, but the mountain fire that circuit below occurs can cause circuit mutually or alternate generation is discharged and trips.Under thermal extremes and arid weather condition, forest easily sends out large area mountain fire, and in the time that mountain fire appears in circuit below, circuit phase ground or alternate gap will puncture, when particularly mountain fire is through the shared corridor of multi circuit transmission lines, likely cause many line trippings, cause large area blackout.
Mountain fire is that one occurs in unmanageable fire between woods open country, and not only temperature and flame height are high, but also are involved in a large amount of ashes and smog, under the effect of the factor such as hillside and wind-force, circuit external insulation are had to very large destructiveness.Therefore mountain fire is a kind of heterogeneous body that flame conductivity is space charge, flue gas and ashes and high temperature that relates to, and its flash-over characteristic is more than pure clearance complexity.The anti-mountain fire of current transmission line of electricity also rests on the aspects such as the felling cleaning of circuit corridor vegetation, and vegetation cleaning with high costs and be difficult to effective enforcement, how effectively to manage near vegetation transmission line of electricity to guarantee transmission line of electricity under mountain fire condition safety and reliability significant, the insulating property of transmission line of electricity under mountain fire condition to Transmission Line Design, operation maintenance and contingency condition dispatching with move same significant.
In prior art, under mountain fire condition, transmission line of electricity phase ground or alternate gap being carried out to the research of breakdown characteristics, is the important channel that solves transmission line of electricity failure of insulation under mountain fire condition, has following defect but work as front simulation mountain fire discharge examination:
1.: the poor repeatability of simulation mountain fire, cause the repeatability of testing result and dispersiveness large, be unfavorable for the discharging law of analysis mode mountain fire;
2.: the poor controllability of simulation mountain fire;
3.: the similarity of simulation mountain fire is poor, can the result of simulation mountain fire be applied to the analysis of transmission line forest fire tripping operation rule, depend under testing conditions and mountain fire condition under the similarity of discharging;
4.: the yardstick of simulation mountain fire is poor, if the simulation mountain fire under testing conditions is reached to the scale of actual mountain fire, the difficulty that operates, cost is high, and have very large safety analysis, the dimensional properties of mountain fire is the key that the testing result of simulating on a small scale mountain fire is applied to actual mountain fire.
To sum up, provide a kind of and can plant the different phase of simulation AC/DC transmission line (utmost point) and the pick-up unit of the mountain fire electric discharge in gap between phase (utmost point) seems particularly important.
Summary of the invention
In order to meet the needs of prior art, the invention provides and a kind ofly simulate circuit phase under mountain fire condition and the pick-up unit of alternate gap discharge characteristic, described device comprises power transmission line analogue unit, mountain fire analogue unit, measuring unit and power supply unit;
Described power transmission line analogue unit, for simulating gap, phase ground, gap, polar region, alternate gap and the pole clearance of AC/DC transmission line;
Described measuring unit, for measuring form, temperature, leakage current and the sparking voltage of mountain fire flame.
Preferably, described power transmission line analogue unit comprises the wire rope connecting between two column tops; Analog conducting wire is suspended on the stage casing of described wire rope by copper cash;
Preferably, described mountain fire analogue unit comprises fuel platform, weighing unit and blowing unit;
Described weighing unit comprises weighing platform and measurement module, for the wear rate of fuel buttress is monitored, thus the thermal power discharging while obtaining described fuel buttress burning;
Described fuel platform comprises the wire mesh electrode that is arranged on described weighing platform by insulation spacer, for analogue ground electrode; On described wire mesh electrode, be provided with described fuel buttress;
Described blowing unit comprises the air supply duct that is arranged on described weighing platform below; Described blowing unit is used for to the described transmission of fuel buttress wind-force, particle and alkali metal salt particle, thereby adjusts height, temperature, particle content and the conductivity of described mountain fire flame;
Preferably, described measuring unit comprises RC divider, sample resistance, data collecting card, infrared measurement of temperature unit, video acquisition unit and PC;
Described RC divider is connected between analog conducting wire and described data collecting card, for gathering the sparking voltage of described mountain fire flame;
Described sample resistance is connected between the wire mesh electrode and described data collecting card of described mountain fire analogue unit, for gathering the leakage current of described mountain fire flame;
Described video acquisition unit, for gathering the form of described mountain fire flame;
Described PC, according to voltage signal and current signal that described data collecting card is sent, analyzes the discharge process of described mountain fire flame;
Preferably, described power supply unit comprises the vacuum switch, pressure regulator and the transformer that connect successively; Described vacuum switch access 380V power supply; Described transformer is connected with described power transmission line analogue unit with protective resistance by alternating current-direct current change-over switch successively;
Preferably, described weighing unit, described data collecting card, described infrared measurement of temperature unit and described video acquisition unit are connected with described PC by signal synchronous device.
Compared with immediate prior art, excellent effect of the present invention is:
1, in technical solution of the present invention, fuel buttress adopts the rectangle fuel bar of equidistantly arranging, arranged crosswise between every layer of rectangle fuel bar, make that mountain fire size is controlled, mountain fire flame holding and repeatability higher, effectively make up under simulation mountain fire condition and detected data dispersiveness greatly, the not enough shortcoming of poor repeatability;
2, in technical solution of the present invention, the temperature of mountain fire flame, highly, the controllability of diameter, particle content and conductivity is good, simple to operation, and improved the accuracy of measuring;
3, in technical solution of the present invention, power transmission line analogue unit can be simulated gap, phase ground, gap, polar region, alternate gap and the pole clearance of AC/DC transmission line, and measurement data is comprehensive, for the analysis of analyzing mountain fire discharge process provides important evidence;
4,, in technical solution of the present invention, analog conducting wire is suspended on the stage casing of wire rope by copper cash, can be convenient to adjust analog conducting wire over the ground with alternate distance;
5,, in technical solution of the present invention, power supply unit is exported continuous DC voltage and alternating voltage by the control of alternating current-direct current change-over switch, and output current is not less than 1A.
Brief description of the drawings
Below in conjunction with accompanying drawing, the present invention is further described.
Fig. 1 is: in the embodiment of the present invention, simulate circuit phase under mountain fire condition and the pick-up unit schematic diagram of alternate gap discharge characteristic;
Fig. 2 is: the analogue means structural drawing in transmission line of electricity phase ground or gap, polar region in the embodiment of the present invention;
Fig. 3 is: the analogue means structural drawing of the alternate or pole clearance of transmission line of electricity in the embodiment of the present invention;
Fig. 4 is: mountain fire analogue means structural drawing in the embodiment of the present invention;
Fig. 5 is: power device structure figure in the embodiment of the present invention.
Embodiment
Describe embodiments of the invention below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Be exemplary below by the embodiment being described with reference to the drawings, be intended to for explaining the present invention, and can not be interpreted as limitation of the present invention.
As shown in Figure 1, in the present embodiment, simulate under mountain fire condition and comprise power transmission line analogue unit, mountain fire analogue unit, measuring unit and power supply unit with the pick-up unit of alternate gap discharge characteristic to circuit phase;
1.: power transmission line analogue unit, for simulating gap, phase ground, gap, polar region, alternate gap and the pole clearance of AC/DC transmission line; Power transmission line analogue unit comprises the wire rope connecting between two column tops; Analog conducting wire is suspended on the stage casing of described wire rope by copper cash;
Fig. 2 shows the gap, phase ground of 1-10m of AC/DC transmission line and the power transmission line analogue means in gap, polar region; Fig. 3 shows the level, triangle of AC-HVDC line, the alternate gap of vertical and compact line, and the power transmission line analogue means of the pole clearance of the horizontal and vertical of AC-HVDC line while arranging.
2.: mountain fire analogue unit, for simulating mountain fire, comprises fuel platform, weighing unit and blowing unit;
Weighing unit comprises weighing platform and measurement module, monitor, thereby the fuel that obtains simulation mountain fire is piled up neatly the thermal power discharging in combustion process for the wear rate to fuel buttress;
Fuel platform comprises the wire mesh electrode that is arranged on weighing platform by insulation spacer, for analogue ground electrode; On wire mesh electrode, be provided with fuel buttress; The wire netting that in the present embodiment, wire mesh electrode is 200*200cm;
As shown in Figure 4, blowing unit comprises the air supply duct that is arranged on weighing platform below; This air supply duct comprises three air outlets, is respectively used to:
A, in fuel buttress, transmit alkali metal salt particle, thereby adjust the conductivity of fuel buttress flame;
B, in fuel buttress, transmit wind-force, thereby adjust height and the temperature of mountain fire flame;
C, to transporting particulates material in fuel buttress, thereby adjust the particle content of mountain fire flame.
3.: measuring unit, for measuring form, temperature, leakage current and the sparking voltage of mountain fire flame, specifically comprises:
A, RC divider, be connected in analog conducting wire and data collecting card between, for gathering the sparking voltage of mountain fire flame; Wherein, detecting voltage is to be the voltage applying in testing process, and sparking voltage is to apply to detect in voltage course, the voltage that power transmission line gap punctures.
B, sample resistance, be connected between the wire mesh electrode and data collecting card of mountain fire analogue unit, for gathering the leakage current of mountain fire flame;
C, video acquisition unit, for gathering the form of mountain fire flame, and interaction between mountain fire flame electric discharge and form;
D, PC, according to voltage signal and current signal that data collecting card is sent, analyze the discharge process of mountain fire flame, comprises and obtaining under different voltage signals, form, current value, current waveform and the power frequency of mountain fire electric discharge;
Weighing unit, data collecting card, infrared measurement of temperature unit and video acquisition unit are connected with PC by signal synchronous device, thereby ensure the real time synchronization of measuring-signal.
4.: as shown in Figure 5, power supply unit comprises the vacuum switch, pressure regulator and the transformer that connect successively; Vacuum switch access 380V power supply; Transformer is connected with power transmission line analogue unit with protective resistance by alternating current-direct current change-over switch successively; Power supply unit is exported continuous DC voltage and alternating voltage by the control of alternating current-direct current change-over switch, and output current is not less than 1A, meets high pressure examination criteria.
Finally should be noted that: described embodiment is only some embodiments of the present application, instead of whole embodiment.Based on the embodiment in the application, those of ordinary skill in the art are not making the every other embodiment obtaining under creative work prerequisite, all belong to the scope of the application's protection.
Claims (6)
1. simulate circuit phase under mountain fire condition and a pick-up unit for alternate gap discharge characteristic, it is characterized in that, described device comprises power transmission line analogue unit, mountain fire analogue unit, measuring unit and power supply unit;
Described power transmission line analogue unit, for simulating gap, phase ground, gap, polar region, alternate gap and the pole clearance of AC/DC transmission line;
Described measuring unit, for measuring form, temperature, leakage current and the sparking voltage of mountain fire flame.
2. pick-up unit as claimed in claim 1, is characterized in that, described power transmission line analogue unit comprises the wire rope connecting between two column tops; Analog conducting wire is suspended on the stage casing of described wire rope by copper cash.
3. pick-up unit as claimed in claim 1, is characterized in that, described mountain fire analogue unit comprises fuel platform, weighing unit and blowing unit;
Described weighing unit comprises weighing platform and measurement module, for the wear rate of fuel buttress is monitored, thus the thermal power discharging while obtaining described fuel buttress burning;
Described fuel platform comprises the wire mesh electrode that is arranged on described weighing platform by insulation spacer, for analogue ground electrode; On described wire mesh electrode, be provided with described fuel buttress;
Described blowing unit comprises the air supply duct that is arranged on described weighing platform below; Described blowing unit is used for to the described transmission of fuel buttress wind-force, particle and alkali metal salt particle, thereby adjusts height, temperature, particle content and the conductivity of described mountain fire flame.
4. pick-up unit as claimed in claim 1, is characterized in that, described measuring unit comprises RC divider, sample resistance, data collecting card, infrared measurement of temperature unit, video acquisition unit and PC;
Described RC divider is connected between analog conducting wire and described data collecting card, for gathering the sparking voltage of described mountain fire flame;
Described sample resistance is connected between the wire mesh electrode and described data collecting card of described mountain fire analogue unit, for gathering the leakage current of described mountain fire flame;
Described video acquisition unit, for gathering the form of described mountain fire flame;
Described PC, according to voltage signal and current signal that described data collecting card is sent, analyzes the discharge process of described mountain fire flame.
5. pick-up unit as claimed in claim 1, is characterized in that, described power supply unit comprises the vacuum switch, pressure regulator and the transformer that connect successively; Described vacuum switch access 380V power supply; Described transformer is connected with described power transmission line analogue unit with protective resistance by alternating current-direct current change-over switch successively.
6. the pick-up unit as described in claim 3 or 4, is characterized in that, described weighing unit, described data collecting card, described infrared measurement of temperature unit and described video acquisition unit are connected with described PC by signal synchronous device.
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Cited By (10)
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| CN104267637A (en) * | 2014-09-19 | 2015-01-07 | 国家电网公司 | Power transmission line mountain fire tripping test platform data full-automatic collecting and controlling method |
| CN104360245A (en) * | 2014-11-17 | 2015-02-18 | 武汉大学 | Gap discharge characteristic test platform influenced by multiple factors under simulated mountain fire condition |
| CN104914370A (en) * | 2015-07-02 | 2015-09-16 | 国家电网公司 | Scalable forest fire smoke guide channel simulation test system under high-voltage transmission line |
| CN106980712A (en) * | 2017-03-06 | 2017-07-25 | 三峡大学 | Transmission line of electricity clearance space total electric field computational methods under the conditions of a kind of mountain fire |
| 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 |
| CN109444564A (en) * | 2018-11-06 | 2019-03-08 | 三峡大学 | The measurement method of vegetation burning particles object carrying capacity under transmission line simulation electric field |
| 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 |
| CN113514701A (en) * | 2021-04-21 | 2021-10-19 | 广东电网有限责任公司电力科学研究院 | Local conductivity measuring device for mountain fire simulation test |
| 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 |
| CN117849561A (en) * | 2024-03-08 | 2024-04-09 | 国网四川省电力公司电力科学研究院 | Distribution line discharge melt ignition type fault test device and test method |
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| CN104267637B (en) * | 2014-09-19 | 2015-08-26 | 国家电网公司 | A kind of forest fire trip test platform for transmission line data automatically gather and control method |
| CN104267637A (en) * | 2014-09-19 | 2015-01-07 | 国家电网公司 | Power transmission line mountain fire tripping test platform data full-automatic collecting and controlling method |
| CN104360245A (en) * | 2014-11-17 | 2015-02-18 | 武汉大学 | Gap discharge characteristic test platform influenced by multiple factors under simulated mountain fire condition |
| CN104914370B (en) * | 2015-07-02 | 2017-11-28 | 国家电网公司 | Scalable mountain fire flue gas guide channel simulation experiment system below ultra-high-tension power transmission line |
| CN104914370A (en) * | 2015-07-02 | 2015-09-16 | 国家电网公司 | Scalable forest fire smoke guide channel simulation test system under high-voltage transmission line |
| CN106980712B (en) * | 2017-03-06 | 2020-04-24 | 三峡大学 | Method for calculating electric field synthesized by gap space of power transmission line under condition of forest fire |
| CN106980712A (en) * | 2017-03-06 | 2017-07-25 | 三峡大学 | Transmission line of electricity clearance space total electric field computational methods under the conditions of a kind of mountain fire |
| 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 |
| CN109444564A (en) * | 2018-11-06 | 2019-03-08 | 三峡大学 | The measurement method of vegetation burning particles object carrying capacity under transmission line simulation electric field |
| 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 |
| CN113514701A (en) * | 2021-04-21 | 2021-10-19 | 广东电网有限责任公司电力科学研究院 | Local conductivity measuring device for mountain fire simulation test |
| 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 |
| CN117849561A (en) * | 2024-03-08 | 2024-04-09 | 国网四川省电力公司电力科学研究院 | Distribution line discharge melt ignition type fault test device and test method |
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Inventor after: Wu Tian Inventor after: Zhu Jianjun Inventor after: Liu Kai Inventor after: Peng Yong Inventor after: Liu Ting Inventor after: Xiao Bin Inventor after: Su Ziming Inventor after: Tang Pan Inventor after: Liu Yan Inventor before: Wu Tian Inventor before: Liu Kai Inventor before: Peng Yong Inventor before: Liu Ting Inventor before: Xiao Bin Inventor before: Su Ziming Inventor before: Tang Pan Inventor before: Liu Yan |
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