CN104049189B - 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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- CN104049189B CN104049189B CN201410286235.1A CN201410286235A CN104049189B CN 104049189 B CN104049189 B CN 104049189B CN 201410286235 A CN201410286235 A CN 201410286235A CN 104049189 B CN104049189 B CN 104049189B
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- mountain fire
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Abstract
Description
Technical field
The present invention relates to a kind of flash-over characteristic detection means is and in particular to a kind of simulate circuit phase ground and phase under the conditions of mountain fire Between gap discharge characteristic detection means.
Background technology
The external insulation of overhead transmission line is using air as dielectric, is affected by atmospheric condition, such as wind, rain, thunder and lightning, Snow etc. often results in circuit external insulation and lost efficacy and tripped, and these tripping fault typically occur in the positions such as tower head or insulator chain, but The mountain fire occurring below circuit but can lead to circuit mutually or alternate generation is discharged and tripped.Thermal extremes and dry weather condition Under, forest easily sends out large area mountain fire, and when mountain fire below circuit, circuit is mutually or alternate gap will puncture, special It is not that mountain fire is possible to cause a plurality of line tripping when the corridor that multi circuit transmission lines share, lead to large area blackout.
Mountain fire is a kind of generation unmanageable fire between woods open country, and not only temperature and flame height are high, but also are involved in Substantial amounts of ashes and smog, in the presence of the factor such as hillside and wind-force, have very big destructiveness to circuit external insulation.Cause This mountain fire be a kind of be related to the multiphase body that flame electrical conductivity is space charge, flue gas and ashes and high temperature, its flash-over characteristic is remote More complicated than pure the air gap.The current anti-mountain fire of transmission line of electricity also rests on the aspects such as the felling cleaning of line corridor vegetation, and plants Cleaned with high costs and be difficult to effectively implement, how effectively to manage vegetation near transmission line of electricity and exist to guaranteeing transmission line of electricity Under the conditions of mountain fire, security and the reliability is significant, and insulating properties under the conditions of mountain fire for the transmission line of electricity set to transmission line of electricity Meter, operation maintenance and contingency condition dispatching are equally significant with operation.
In prior art, under the conditions of mountain fire, to transmission line of electricity, mutually or alternate gap carries out the research of breakdown characteristics, is solution The certainly important channel of transmission line of electricity failure of insulation under the conditions of mountain fire, but there is following lacking in present day analog mountain fire discharge examination Fall into：
①：The poor repeatability of simulation mountain fire, leads to the repeatability of testing result and dispersibility big, is unfavorable for analysis mode mountain The discharging law of fire；
②：The poor controllability of simulation mountain fire；
③：The similarity of simulation mountain fire is poor, and can the result of simulation mountain fire be applied to transmission line forest fire tripping operation rule Analysis, depending on the similarity discharging under testing conditions and under the conditions of mountain fire；
④：The yardstick of simulation mountain fire is poor, if the simulation mountain fire under testing conditions is reached the scale of actual mountain fire, operation Get up difficulty, high cost, and there is very big safety analysis, the dimensional properties of mountain fire are small-scale to be simulated the detection of mountain fire Result is applied to the key of actual mountain fire.
To sum up, provide a kind of mountain that can plant with simulating the different phase (pole) of AC/DC transmission line gap and between phase (pole) The detection means of fire electric discharge is particularly important.
Content of the invention
In order to meet the needs of prior art, the invention provides under the conditions of a kind of simulation mountain fire circuit mutually and alternate between The detection means of gap flash-over characteristic, described device includes power transmission line analogue unit, mountain fire analogue unit, measuring unit and power supply list Unit；
Described power transmission line analogue unit, for simulate AC/DC transmission line phase ground gap, polar region gap, alternate gap And pole clearance；
Described measuring unit, for measuring form, temperature, leakage current and the discharge voltage of mountain fire flame.
Preferably, described power transmission line analogue unit includes connecting the steel wire rope and two column tops between；Analog conducting wire It is suspended on the stage casing of described steel wire rope by copper cash；
Preferably, described mountain fire analogue unit includes fuel platform, weighing unit and blowing unit；
Described weighing unit includes weighing platform and measurement module, for being monitored to the wear rate that fuel is piled up neatly, from And obtain the thermal power discharging during described fuel buttress burning；
Described fuel platform includes being arranged on the wire mesh electrode of described weighing platform by insulation spacer, connects for simulation Ground electrode；Described fuel buttress is provided with described wire mesh electrode；
Described blowing unit includes being arranged on the air supply duct below described weighing platform；Described blowing unit is used for institute State fuel buttress transmission wind-force, particulate matter and alkali metal salt granule, thus adjusting the height of described mountain fire flame, temperature, particulate matter Content and electrical conductivity；
Preferably, described measuring unit includes RC divider, sample resistance, data collecting card, infrared measurement of temperature unit, regards Frequency collecting unit and PC；
Described RC divider is connected between analog conducting wire and described data collecting card, for gathering described mountain fire flame Discharge voltage；
Described sample resistance is connected between wire mesh electrode and the 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 the voltage signal that described data collecting card is sent and current signal, to described mountain fire flame Discharge process be analyzed；
Preferably, described power subsystem includes vacuum switch, pressure regulator and the transformator being sequentially connected；Described vacuum switch Access 380V power supply；Described transformator passes sequentially through alternating current-direct current switching switch and protective resistance and described power transmission line analogue unit phase Even；
Preferably, described weighing unit, described data collecting card, described infrared measurement of temperature unit and described video acquisition unit It is connected with described PC by signal synchronizer.
Compared with immediate prior art, the excellent effect of the present invention is：
1st, in technical solution of the present invention, fuel is piled up neatly using the rectangle fuel bar being equally spaced, every layer of rectangle fuel Arranged crosswise between bar, so that mountain fire size is controlled, mountain fire flame holding and repeatability are higher, effectively compensate for simulating mountain fire Under the conditions of detection data dispersibility big, the shortcoming of the deficiency of poor repeatability；
2nd, in technical solution of the present invention, the temperature of mountain fire flame, highly, diameter, particle content and electrical conductivity controlled Property is good, simple to operation, and improves the accuracy of measurement；
3rd, in technical solution of the present invention, power transmission line analogue unit can simulate the phase ground gap of AC/DC transmission line, pole Ground gap, alternate gap and pole clearance, measurement data comprehensively, the analysis for analyzing mountain fire discharge process provide important according to According to；
4th, in technical solution of the present invention, analog conducting wire is suspended on the stage casing of steel wire rope by copper cash, can be conveniently adjusted mould Intend wire over the ground with alternate distance；
5th, in technical solution of the present invention, power subsystem by alternating current-direct current switch on-off control export continuous DC voltage and Alternating voltage, and output current is not less than 1A.
Brief description
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is：Circuit mutually the detection dress with alternate gap discharge characteristic under the conditions of simulation mountain fire in the embodiment of the present invention Put schematic diagram；
Fig. 2 is：The analog structure chart in transmission line of electricity phase ground or polar region gap in the embodiment of the present invention；
Fig. 3 is：In the embodiment of the present invention, transmission line of electricity is alternate or the analog structure chart of pole clearance；
Fig. 4 is：Mountain fire analog structure chart in the embodiment of the present invention；
Fig. 5 is：Power device structure figure in the embodiment of the present invention.
Specific embodiment
Embodiments of the invention are described below in detail, the example of described embodiment is shown in the drawings, wherein from start to finish The element that same or similar label represents same or similar element or has same or like function.Below with reference to attached The embodiment of figure description is exemplary it is intended to be used for explaining the present invention, and is not considered as limiting the invention.
As shown in figure 1, circuit mutually the detection dress with alternate gap discharge characteristic under the conditions of simulation mountain fire in the present embodiment Put including power transmission line analogue unit, mountain fire analogue unit, measuring unit and power subsystem；
①：Power transmission line analogue unit, for simulate AC/DC transmission line phase ground gap, polar region gap, alternate gap And pole clearance；Power transmission line analogue unit includes connecting the steel wire rope and two column tops between；Analog conducting wire passes through copper cash It is suspended on the stage casing of described steel wire rope；
Fig. 2 shows the phase ground gap of the 1-10m of AC/DC transmission line and the power transmission line analog in polar region gap；Figure 3 levels showing AC-HVDC line, triangle, the alternate gap of vertical and compact line, and AC-HVDC line The power transmission line analog of pole clearance during horizontal and vertical arrangement.
②：Mountain fire analogue unit, for simulating mountain fire, including fuel platform, weighing unit and blowing unit；
Weighing unit includes weighing platform and measurement module, for being monitored to the wear rate that fuel is piled up neatly, thus obtaining The thermal power that the fuel buttress of mountain fire discharges in combustion intended by delivery；
Fuel platform includes being arranged on the wire mesh electrode of weighing platform by insulation spacer, for analogue ground electrode； Fuel buttress is provided with wire mesh electrode；In the present embodiment, wire mesh electrode is the wire netting of 200*200cm；
As shown in figure 4, blowing unit includes being arranged on the air supply duct below weighing platform；This air supply duct includes three Air outlet, is respectively used to：
A, to fuel buttress in transmit alkali metal salt granule, thus adjust fuel pile up neatly flame electrical conductivity；
B, to fuel buttress in transmit wind-force, thus adjusting height and the temperature of mountain fire flame；
C, to fuel buttress in transporting particulates material, thus adjusting the particle content of mountain fire flame.
③：Measuring unit, for measuring form, temperature, leakage current and the discharge voltage of mountain fire flame, specifically includes：
A, RC divider, be connected to analog conducting wire and data collecting card between, for gathering the electric discharge of mountain fire flame Voltage；Wherein, detection voltage is to be the voltage applying in detection process, during discharge voltage is then applying detection voltage, defeated The voltage that electric wire gap punctures.
B, sample resistance, are connected between wire mesh electrode and the data collecting card of mountain fire analogue unit, for gathering The leakage current of mountain fire flame；
C, video acquisition unit, for gathering the phase between the form of mountain fire flame, and mountain fire flame discharge and form Interaction；
D, PC, according to the voltage signal that data collecting card is sent and current signal, the discharge process to mountain fire flame It is analyzed, including obtaining under different voltage signals, the form of mountain fire electric discharge, current value, current waveform and power frequency；
Weighing unit, data collecting card, infrared measurement of temperature unit and video acquisition unit pass through signal synchronizer and PC It is connected, thus ensureing the real time synchronization of measurement signal.
④：As shown in figure 5, power subsystem includes vacuum switch, pressure regulator and the transformator being sequentially connected；Vacuum switch connects Enter 380V power supply；Transformator is passed sequentially through alternating current-direct current switching switch and is connected with power transmission line analogue unit with protective resistance；Power supply list Unit switches on-off control by alternating current-direct current and exports continuous DC voltage and alternating voltage, and output current is not less than 1A, meets High pressure examination criteria.
Finally it should be noted that：Described embodiment is only some embodiments of the present application, rather than whole realities Apply example.Based on the embodiment in the application, those of ordinary skill in the art are obtained under the premise of not making creative work Every other embodiment, broadly fall into the application protection scope.
Claims (4)
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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 |
| 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 |
| 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 |
| CN109239549B (en) * | 2018-08-31 | 2020-02-04 | 国网湖南省电力有限公司 | Test device capable of decoupling interaction of power transmission line and forest fire and use method |
| 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 |
| 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 |
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| JP3534216B2 (en) * | 1996-02-08 | 2004-06-07 | 三井住友建設株式会社 | Monitoring equipment for grounding systems of electrical equipment installed in insulated buildings |
| JP4829023B2 (en) * | 2005-07-29 | 2011-11-30 | 河村電器産業株式会社 | Leakage current detection circuit |
| CN102162830A (en) * | 2011-04-02 | 2011-08-24 | 中国南方电网有限责任公司超高压输电公司梧州局 | Experimental device for simulating high-voltage transmission line flashover discharge caused by forest fire |
| CN102680839B (en) * | 2012-06-01 | 2014-05-14 | 湖南省电力公司科学研究院 | Testing method for forest fire trip of transmission line |
| CN102662123A (en) * | 2012-06-01 | 2012-09-12 | 湖南省电力公司科学研究院 | Forest fire trip test platform for transmission line |
| CN103345809A (en) * | 2013-06-21 | 2013-10-09 | 国家电网公司 | System for monitoring forest fire along electric transmission line in on-line mode |
| CN103440599A (en) * | 2013-09-16 | 2013-12-11 | 国家电网公司 | GIS (Geographic Information System) platform-based method for drawing distribution map of mountain fire points of power grid electric transmission line |
| CN203981826U (en) * | 2014-06-24 | 2014-12-03 | 国家电网公司 | The detection platform of circuit phase ground and alternate gap discharge characteristic under simulation mountain fire condition |
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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 |