CN111693836A - 一种电缆终端硅油电热湿联合老化试验平台 - Google Patents
一种电缆终端硅油电热湿联合老化试验平台 Download PDFInfo
- Publication number
- CN111693836A CN111693836A CN202010622587.5A CN202010622587A CN111693836A CN 111693836 A CN111693836 A CN 111693836A CN 202010622587 A CN202010622587 A CN 202010622587A CN 111693836 A CN111693836 A CN 111693836A
- Authority
- CN
- China
- Prior art keywords
- test
- silicone oil
- oven
- aging
- cover plate
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 98
- 230000032683 aging Effects 0.000 title claims abstract description 65
- 239000003921 oil Substances 0.000 title claims abstract description 24
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 title claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 title claims abstract description 12
- 239000010703 silicon Substances 0.000 title claims abstract description 12
- 230000005611 electricity Effects 0.000 title claims abstract description 5
- 229920002545 silicone oil Polymers 0.000 claims abstract description 55
- 238000009413 insulation Methods 0.000 claims abstract description 11
- 238000002474 experimental method Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 11
- 230000001681 protective effect Effects 0.000 claims description 9
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052802 copper Inorganic materials 0.000 claims description 8
- 239000010949 copper Substances 0.000 claims description 8
- -1 polytetrafluoroethylene Polymers 0.000 claims description 7
- 229920001343 polytetrafluoroethylene Polymers 0.000 claims description 7
- 239000004810 polytetrafluoroethylene Substances 0.000 claims description 7
- 238000004378 air conditioning Methods 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 239000005341 toughened glass Substances 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 239000004973 liquid crystal related substance Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 2
- 229910052782 aluminium Inorganic materials 0.000 claims description 2
- 239000000565 sealant Substances 0.000 claims description 2
- 239000011521 glass Substances 0.000 claims 1
- 230000008859 change Effects 0.000 abstract description 12
- 238000011160 research Methods 0.000 abstract description 11
- 238000005485 electric heating Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 5
- 230000007246 mechanism Effects 0.000 abstract description 3
- 238000010438 heat treatment Methods 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 230000015556 catabolic process Effects 0.000 description 5
- 239000010410 layer Substances 0.000 description 5
- 238000003878 thermal aging Methods 0.000 description 4
- 239000004593 Epoxy Substances 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000004888 barrier function Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 2
- 239000011229 interlayer Substances 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 229910001220 stainless steel Inorganic materials 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 230000003679 aging effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002107 myocardial effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229920002379 silicone rubber Polymers 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1281—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of liquids or gases
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/04—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance
- G01N27/06—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating resistance of a liquid
- G01N27/07—Construction of measuring vessels; Electrodes therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/221—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance by investigating the dielectric properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/226—Construction of measuring vessels; Electrodes therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/02—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance
- G01N27/22—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating impedance by investigating capacitance
- G01N27/228—Circuits therefor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2617—Measuring dielectric properties, e.g. constants
- G01R27/2623—Measuring-systems or electronic circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
- G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
- G01R27/26—Measuring inductance or capacitance; Measuring quality factor, e.g. by using the resonance method; Measuring loss factor; Measuring dielectric constants ; Measuring impedance or related variables
- G01R27/2688—Measuring quality factor or dielectric loss, e.g. loss angle, or power factor
- G01R27/2694—Measuring dielectric loss, e.g. loss angle, loss factor or power factor
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/14—Circuits therefor, e.g. for generating test voltages, sensing circuits
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/16—Construction of testing vessels; Electrodes therefor
Landscapes
- General Physics & Mathematics (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Power Engineering (AREA)
- Engineering & Computer Science (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
本发明涉及一种用于电缆终端硅油电热湿联合老化试验平台,所述试验平台包括试验电源,试验烘箱,密封测试罐体,穿墙套管;待测硅油试样置于密封测试罐体中,密封测试罐体置于试样烘箱中,本发明在罐体整体结构配合下可有效进行硅油电老化试验。可保障研究人员顺利开展绝缘硅油电热湿联合老化试验,并能调节包括温度,电极间距,外施电压,环境湿度等在内的多种变化因素。此发明为研究电力电缆终端硅油老化特性提供了更精准的试验手段,有助于科研人员全面研究硅油不同老化因素导致不同老化进程的变化机理。
Description
技术领域
本发明属于电力电缆测试技术领域,具体涉及一种用于电缆终端硅油电热湿联合老化试验平台。
背景技术
电力电缆的运行可靠性直接关系到电网的本质安全。与架空输电线路相比,电力电缆主要敷设于地下且其绝缘层级多,状态可观察性较差。从而导致其安装工艺不当而遗留的内部隐患难以及时被发现和排查。其中电缆终端内部硅油长期处于高压高温的恶劣条件而发生老化,并导致其不可避免的产生杂质引发变质,进而降低硅油绝缘等级,长期如此极易产生绝缘失效引发的一系列安全事故,严重威胁电力系统的安全运行。因此,研究不同老化状态下电缆终端硅油电气性能,分析不同外界因素作用下电缆终端硅油的老化机理,对提升电力系统运行可靠性十分重要。
然而,多年运行线路中的老化状态下电缆终端硅油往往不易获取,且其数量较少,不利于老化实验研究的开展。因此,目前多数研究者均采用人为老化方式模拟硅油在实际线路中的运行环境从而加速新油的老化进程,以此来获取足量老化油样本开展相关实验研究。针对现有硅油老化方式,以电老化与热老化为主。在电老化方面,目前多采用以针板电极为主的加压方式,将硅油置于容器中,利用针电极放电结构加速其老化进程。而在热老化方面,则需要将硅油置于密闭容器并将容器放置于烘箱中,通过调整烘箱温度来控制硅油热老化进程。
目前加速绝缘硅油老化进程方式较为单一,难以在电热老化过程中调整各影响因素的变化,如:在电老化过程中,针板电极固定后难以调整针板间距,从而无法控制电极间距变化带来老化程度不同的影响。而在热老化过程中,由于罐体密封需求,给实验后期取油带来了极大的难度。另外,由于实验操作难度较大,目前少有研究绝缘硅油电热联合老化的相关实验。但考虑真实电缆运行情况,针对终端绝缘硅油开展电热联合老化研究却必不可少。同时,多数研究表明,环境湿度、硅油含水量等因素同样会对绝缘硅油电气性能产生巨大影响,然而目前少有针对湿度影响因素的成体系研究,更加缺乏针对湿度、温度、高电压等多种因素共同作用下的硅油老化实验开展的解决方案。
发明内容
本发明的目的是提供一种针对电缆终端绝缘硅油老化试验研发一套硅油电热湿联合老化试验平台,以满足电缆终端硅油老化特性的研究需求,弥补上述现有试验平台的缺陷与不足。
为了实现上述目的,本发明所采用的技术方案是:
一种电缆终端硅油电热湿联合老化试验平台,所述试验平台包括试验电源,试验烘箱,密封测试罐体,穿墙套管;待测硅油置于密封测试罐体中,密封测试罐体置于试验烘箱中。
所述试验电源包括调压器、无晕变压器、保护电阻、电容分压器,其中:调压器输入端连接交流电,其输出端连接无晕变压器输入端用以控制变压器输出,而无晕变压器输出端串联保护电阻,保护电阻的另一端并联电容分压器用于在实验中实时监测无晕变压器输出电压幅值。
所述试验烘箱具备同时调节箱体内部温度湿度的功能,所述试验烘箱包括试验箱体和电气控制柜及加湿器,所述电气控制柜置于试验箱体正面;试验箱体包括箱体以及高压穿墙套管穿过试验箱体顶部引入的高压电极。箱体包括由内而外依次设置的空气调节装置、环氧板阻绝层、内胆、保温隔层和温度控制箱外壳。
在所述电缆终端硅油电热湿联合老化试验平台中,试验烘箱的箱体由环氧树脂绝缘层紧贴内胆敷设;顶部中央开孔,将穿墙套管引入箱体内部,并根据箱体实际高度与所用套管长度决定套管的引入深度。以保证足量的接线距离与试验空间。试验箱体底部开孔,内套环氧树脂筒打通引入接地线。空气调节装置则放置于试验箱体后部,空气调节装置包括加热器、空气搅拌装置与进出风口,进出风口根据需求采用旋钮控制其流量。
所述密封测试罐体整体由钢化玻璃密封,密封测试罐体上端采用聚四氟乙烯板贴合。聚四氟乙烯板反面放置密封圈保证容器整体气密性,16根长螺杆沿聚四氟乙烯盖板圆周固定。聚四氟乙烯板中央开孔,由一根双头螺纹的铜杆穿过,铜杆四周由密封胶密封保证气密性。另外,聚四氟乙烯板上部采用一块环形铝板压牢,形成双层固定盖板结构。所述密封测试罐体内置针-板电极,板电极固定,针电极依靠所述铜杆螺纹拧入,通过旋转铜杆螺纹可调节针-板间距。另外,在密封测试罐体底部设置有活塞,用以老化后取油。
本发明的有益效果为,待测硅油置于密闭测试罐体中,在罐体整体结构配合下可有效进行硅油电老化试验。并通过旋转针电极螺纹达到控制针-板电极间距以控制老化程度的目的。另外侧边设置的取油活塞很好的避免硅油老化后取油困难的实际问题。另外,配合高压烘箱,由高压套管引入高压电极至烘箱内部可实现电老化基本功能,另外,烘箱内置不锈钢加热管控制烘箱内温度,加湿器与压缩器、湿度传感器与控制器联动可实现烘箱内部湿度调节。结合上述功能可保障研究人员顺利开展绝缘硅油电热湿联合老化试验,并能调节包括温度,电极间距,外施电压,环境湿度等在内的多种变化因素。此发明为研究电力电缆终端硅油老化特性提供了更精准的试验手段,有助于科研人员全面研究硅油不同老化因素导致不同老化进程的变化机理。
附图说明
图1为本发明整体接线图;
图2为高压烘箱,密封测试罐体布局设置细节图;
图3(a)为本发明一个具体实施例高压绝缘套管主视图;
图3(b)为本发明一个具体实施例高压绝缘套管侧视图;
图4(a)为本发明一个具体实施中不同加湿时间下硅油含水量变化;
图4(b)为本发明一个具体实施中不同加湿时间下硅油电气性能参数变化,包括击穿电压,介质损耗角正切,介电常数,体积电阻率;
图4(c)为本发明一个具体实施中90℃下不同热老化时间段硅油电气心梗参数变化;
图4(d)为本发明一个具体实施中加压22kV电老化条件下硅油电气性能参数变化。
具体实施方式
下面结合附图与具体实施例对本发明内容做进一步说明,但不作为对本发明的限定。
本实施例一种电缆终端硅油电热湿联合老化试验平台,包括试验电源,试验烘箱,密封测试罐体,穿墙套管。
在所述电缆终端硅油电热湿联合老化试验平台中,试验烘箱包括试验箱体和电气控制柜,电气控制柜置于试验箱体正面;试验箱体包括箱体、高压穿墙套管穿过试验箱体顶部引入的高压电极。箱体包括由内而外依次设置的空气调节装置、环氧板阻绝层、加湿装置、内胆、保温隔层和温度控制箱外壳。
详细地,取待测硅油置于密封测试罐体中,注入油量需使针板电极结构完全浸没于待测硅油中,并拧牢密封罐上盖板。根据实验需求调整针-板电极间距为 3mm。
如图1所示,按图一所示连接线路,其中电源部分电老化电场由试验变压器提供。套管一段置于烘箱内部,另一端置于空气中。套管于空气中部分与电源高压极相连,为避免连接线直接在空气中产生局部放电,连接导线外套波纹管。
详细地,试验电源具体包括调压器、无晕变压器、保护电阻、电容分压器。其中:调压器输入端连接380kV/50Hz交流电,其输出端连接无晕变压器输入端用以控制无晕变压器输出。而无晕变压器输出端串联保护电阻。保护电阻的另一端并联电容分压器用于在实验中实时监测变压器输出电压幅值。
进一步,如图2所示,穿墙套管于试验烘箱一侧接头由一根额定电压等级 50kV的导线连接于密封测试罐体上端双螺纹铜杆,用于给针电极供电。板电极由密封罐体下端出线口于地线相连,此处在试验烘箱地板开直径2.5cm通孔以保证外部地线接入试验烘箱体内,满足高压试验中可靠接地的需求。
进一步,密封罐体筒体采用10毫米钢化玻璃精加工制成,保证一定机械强度的同时有着良好的透明度,能使试验人员能随时观察老化进程中罐体内部硅油物理状态的变化。同时,此处密封罐体筒体处钢化玻璃尺寸为,内径30厘米,高度15厘米。密封罐体上端设计采用聚四氟乙烯盖板压牢,下层盖板反面设有凹槽用于内嵌密封圈,16根45#刚质长螺杆沿罐体圆周用于进一步固定。
进一步,试验烘箱外部配备触控液晶显示器,实验人员可通过按压平布操作实现温度、湿度调节。试验烘箱内部为防止四周高压电极对箱体壁放电,采用8 mm厚度环氧树脂板平铺,环氧板内侧采用防泄流锡纸包裹。烘箱内部工作室尺寸考虑足够安全裕度设置尽量大的安全空间。此处设置工作区尺寸为 800*1500*1000mm,烘箱外形尺寸为900*1700*1200mm。温度控制箱采用一体式结构,试验区与空气压缩机分离安装,电气控制柜置于箱体侧面,试验烘箱采用左侧单开转轴设计,采用硅橡胶密封条密封;空气调节室由加热器、空气搅拌装置等元器件与进出风口组成,出风口孔径由旋钮调节,出风口调节角度为0~360度,箱体内外出风量,用以控制升温速率;温度控制箱的空气循环系统由内置空调间、循环风道组成,采用长轴离心式通风扇,外置长轴旋转电机驱动风扇旋转,保证箱体内部空气循环流动而促使整个箱体内部温度保持均匀状态。;试验烘箱的加热方案为:试验烘箱内板四周布置不锈钢加热管,升温过程中加热管同时工作给箱体内部空气加热,并有内置温度传感器实时监测箱体工作区内温度变化,并反馈给控制器调节加热功率。本实施例中,考虑套管耐热因素的影响,试验烘箱温度调节范围设定为RT+5℃~125℃。试验烘箱加湿方案为:试验烘箱底部设有水箱,在有加湿需求时先将水箱中加入一定量的水,并通过外侧液晶面板启动加湿功能,此时加湿器中压缩机启动,液态水转换为水蒸气进入箱体内部加湿,并由内置湿度传感器与烘箱控制器联动控制箱体内部湿度。本实施例中湿度控制范围为0~100%RH,但需要强调的是,当烘箱温度设定超过100摄氏度时,此时默认湿度为零,湿度功能关闭。
进一步,高压套管置于烘箱正上方,依据套管尺寸在烘箱正上方开孔用以方便套管将试验电源引入箱体内部。如图3所示,本实施例中套管尺寸为:总长度1015±10毫米,套管设计为穿墙结构,烘箱内外两侧设计为对称形式,单侧绝缘伞裙长度为365±5毫米。套管内芯为铜材质,导电杆为宽度40毫米扁长条形。
进一步,每次实验中,先将烘箱升至设定温度、湿度2小时,以保证箱体内部温度稳定且均匀,再上电开始电热湿联合老化实验。实验中,由烘箱内置控制器计时,达老化时间后停止加热加湿并发出警报,实验人员可根据警报铃提示停止老化实验,并取油测试,取油步骤前,需关闭高压电源与烘箱电源。将密封罐体右侧取油活塞拧开,待测硅油可缓缓流出,用以进一步进行硅油电气性能与理化性能的测试流程。
图4为在本实施例的基础上对硅油开展老化实验的测试结果,以验证本发明所述实验平台老化作用的有效性。
如图4(a)所示,设定加湿湿度为RH 60%,老化时间90min内硅油含水量逐渐增加。如图4(b)所示,通过对该状态下待测硅油电气性能测试可知,其击穿电压、体积电阻率均随湿度上升而显著降低,预示着硅油绝缘性能的劣化。
另外,在本实施例中利用相同硅油进行了90℃下的热老化实验,如图4(c) 所示。硅油介质损耗因数随老化时间延长有上升趋势,其击穿电压与体积电阻率仍然呈现显著的下降趋势。
而在电老化条件下,本实施例进行了22kV下的老化实验,检测针板放电下硅油电气性能指标的变化情况。如图4(d)所示,直接反应硅油绝缘性能的指标:击穿电压与体积电阻率,同样呈现显著的下降趋势。
从电气参数的测量结果来看,本发明所述一种电缆终端硅油电热湿联合老化试验平台能在三种不同老化方式下对待测硅油劣化程度产生明显的影响,有助于研究人员在不同影响因素下开展硅油的老化特性试验研究。
应当理解的是,本发明未详细阐述的部分均属于现有技术。
虽然以上结合附图描述了本发明的具体实施方式,但是本领域普通技术人员应当理解,这些仅是举例说明,可以对这些实施方式做出多种变形或修改,而不背离本发明的原理和实质,这都应纳入本发明的保护范围。
Claims (5)
1.一种电缆终端硅油电热湿联合老化试验平台,其特征在于:所述试验平台包括试验电源,试验烘箱,密封测试罐体,穿墙套管;待测硅油试样置于密封测试罐体中,密封测试罐体置于试样烘箱中。
2.根据权利要求1所述一种电缆终端硅油电热湿联合老化试验平台,其特征在于:所述试验电源包括调压器、无晕变压器、保护电阻、电容分压器,其中:调压器输入端连接交流电源,调压器输出端连接无晕变压器输入端用以控制无晕变压器输出,而无晕变压器输出端串联保护电阻,保护电阻的另一端并联电容分压器用于在实验中实时监测变压器输出电压幅值。
3.根据权利要求1所述一种电缆终端硅油电热湿联合老化试验平台,其特征在于:所述试验烘箱具备同时调节箱体内部温度湿度的功能,所述试验烘箱上端根据所述穿墙套管外径尺寸开孔,试验烘箱内部四周采用环氧树脂绝缘板平铺包裹,防止高压电极对箱体内壁放电;试验烘箱箱体底部开孔,开孔处内套环氧树脂筒打通引入接地线,空气调节装置则放置于试验烘箱后部,所述空气调节装置包括加热器、空气搅拌装置以及进出风口,所述进出风口根据需求采用旋钮控制其流量,试验烘箱外部设置液晶触摸屏,试验人员根据试验需求调整试验烘箱内的温度与湿度。
4.根据权利要求1所述一种电缆终端硅油电热湿联合老化试验平台,其特征在于:所述密封测试罐体筒体由透明钢化玻璃制成,上下盖板由聚四氟乙烯板压牢,针-板电极分别固定于上下盖板中央,二者间距根据用于设置针电极的螺纹调节,其中上层盖板由两层绝缘板叠加提升密封性能,16根长螺杆沿盖板圆周固定,盖板中央开孔,由一根双头螺纹的铜杆穿过,铜杆四周由密封胶密封保证气密性,另外,盖板上部采用一块环形铝板压牢,形成双层固定盖板结构,所述密封测试罐体内置针-板电极,板电极固定,针电极依靠所述铜杆螺纹拧入,通过旋转铜杆螺纹调节针-板间距,盖板与钢化玻璃筒体接触一侧设置凹槽用于放置密封圈保证气密性,玻璃筒体侧面设置取油活塞,老化试验结束后打开活塞方便研究人员驱除老化油样开展监测工作。
5.根据权利要求1所述一种电缆终端硅油电热湿联合老化试验平台,其特征在于:所述交流电源为380kV/50Hz交流电,所述保护电阻值为100kV,2MΩ。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010622587.5A CN111693836A (zh) | 2020-06-30 | 2020-06-30 | 一种电缆终端硅油电热湿联合老化试验平台 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN202010622587.5A CN111693836A (zh) | 2020-06-30 | 2020-06-30 | 一种电缆终端硅油电热湿联合老化试验平台 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN111693836A true CN111693836A (zh) | 2020-09-22 |
Family
ID=72484953
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN202010622587.5A Pending CN111693836A (zh) | 2020-06-30 | 2020-06-30 | 一种电缆终端硅油电热湿联合老化试验平台 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN111693836A (zh) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112269090A (zh) * | 2020-11-04 | 2021-01-26 | 中车青岛四方机车车辆股份有限公司 | 老化与局放测试装置 |
CN112730538A (zh) * | 2020-12-22 | 2021-04-30 | 国网内蒙古东部电力有限公司呼伦贝尔供电公司 | 一种温湿度可调的绝缘油介电特性测试装置及方法 |
CN113671298A (zh) * | 2021-09-23 | 2021-11-19 | 重庆大学 | 一种航空电机绕组绝缘热老化试验平台与试验方法 |
CN113960099A (zh) * | 2021-10-22 | 2022-01-21 | 南方电网科学研究院有限责任公司 | 一种git的环保型混合气体过热分解及散热试验装置 |
CN114018795A (zh) * | 2021-11-05 | 2022-02-08 | 国网四川省电力公司电力科学研究院 | 一种sf6密度继电器防震油老化试验箱及试验方法 |
CN114152846A (zh) * | 2021-11-26 | 2022-03-08 | 国网上海市电力公司 | 一种基于电热湿联合因素的绝缘老化试验平台 |
CN117074841A (zh) * | 2023-10-17 | 2023-11-17 | 国网辽宁省电力有限公司 | 一种电力设备光热老化联合检测设备 |
-
2020
- 2020-06-30 CN CN202010622587.5A patent/CN111693836A/zh active Pending
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112269090A (zh) * | 2020-11-04 | 2021-01-26 | 中车青岛四方机车车辆股份有限公司 | 老化与局放测试装置 |
CN112730538A (zh) * | 2020-12-22 | 2021-04-30 | 国网内蒙古东部电力有限公司呼伦贝尔供电公司 | 一种温湿度可调的绝缘油介电特性测试装置及方法 |
CN113671298A (zh) * | 2021-09-23 | 2021-11-19 | 重庆大学 | 一种航空电机绕组绝缘热老化试验平台与试验方法 |
CN113960099A (zh) * | 2021-10-22 | 2022-01-21 | 南方电网科学研究院有限责任公司 | 一种git的环保型混合气体过热分解及散热试验装置 |
CN114018795A (zh) * | 2021-11-05 | 2022-02-08 | 国网四川省电力公司电力科学研究院 | 一种sf6密度继电器防震油老化试验箱及试验方法 |
CN114018795B (zh) * | 2021-11-05 | 2023-09-26 | 国网四川省电力公司电力科学研究院 | 一种sf6密度继电器防震油老化试验箱及试验方法 |
CN114152846A (zh) * | 2021-11-26 | 2022-03-08 | 国网上海市电力公司 | 一种基于电热湿联合因素的绝缘老化试验平台 |
CN117074841A (zh) * | 2023-10-17 | 2023-11-17 | 国网辽宁省电力有限公司 | 一种电力设备光热老化联合检测设备 |
CN117074841B (zh) * | 2023-10-17 | 2024-02-20 | 国网辽宁省电力有限公司 | 一种电力设备光热老化联合检测设备 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN111693836A (zh) | 一种电缆终端硅油电热湿联合老化试验平台 | |
CN109188213A (zh) | 一种变压器内部故障模拟实验装置 | |
CN104076232B (zh) | 一种变压器油纸绝缘电热联合老化实验装置 | |
CN101408578B (zh) | 变压器油纸绝缘多因子加速老化试验装置及试验方法 | |
CN109932307A (zh) | 变压器铜油纸系统电热联合老化实验装置与取样方法 | |
CN101713721A (zh) | 一种变压器油纸绝缘热老化的实验装置与实验方法 | |
CN108519545A (zh) | 一种极寒条件下高压绝缘子沿面闪络实验装置及方法 | |
CN111880054B (zh) | 变压器油纸绝缘长时间电热联合老化实验装置及方法 | |
CN207215920U (zh) | 老化测试机及老化测试系统 | |
CN109406961A (zh) | 一种电力电子器件绝缘试验装置 | |
CN102974407A (zh) | 一种非饱和高压加速老化试验箱 | |
CN212675082U (zh) | 一种电缆终端硅油电热湿联合老化试验平台 | |
CN110954835A (zh) | 一种有效测试热失控的试验装置 | |
CN107621574B (zh) | 研究负载条件下套管内绝缘水分分布的实验方法 | |
CN111276027A (zh) | 一种模拟实验装置及方法 | |
CN202512205U (zh) | 一种倒置式电流互感器油纸绝缘故障仿真模型 | |
CN108957254A (zh) | 一种电热复合场下绝缘子沿面闪络特性实验装置及方法 | |
CN216900736U (zh) | 考虑多因素的电力设备材料老化试验系统 | |
CN108732479A (zh) | 基于磁振子搅拌循环的可视化油纸绝缘电热联合老化装置 | |
CN207742287U (zh) | 高温油介质耐压击穿试验仪 | |
CN110308340A (zh) | 一种直流穿墙套管故障模拟装置及方法 | |
CN111948497A (zh) | 一种变压器绝缘纸的老化试验装置及试验方法 | |
CN105509785A (zh) | 一种可模拟现场覆冰气象条件的人工覆冰试验平台 | |
CN210181158U (zh) | 一种变压器绝缘纸的老化试验装置 | |
CN208568972U (zh) | 油纸绝缘电热联合应力老化试验装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination |