高电压技术
高電壓技術
고전압기술
HIGH VOLTAGE ENGINEERING
2009年
8期
1914-1919
,共6页
张颖瑶%刘志远%耿英三%王季梅
張穎瑤%劉誌遠%耿英三%王季梅
장영요%류지원%경영삼%왕계매
绝缘特性%全武合金%真空灭弧室%触头材料%雷电冲击电压%工频电压
絕緣特性%全武閤金%真空滅弧室%觸頭材料%雷電遲擊電壓%工頻電壓
절연특성%전무합금%진공멸호실%촉두재료%뇌전충격전압%공빈전압
dielectric performance%Quanwu alloy%vacuum interrupters%contact material%lightning impulse voltage%power frequency voltage
真空绝缘性能决定着真空灭弧室的设计及成本,在真空断路器向高电压等级发展的背景下真空绝缘性能研究显得尤为重要.触头材料是影响真空绝缘性能的重要因素之一,因此新型触头材料真空绝缘性能的研究成为真空绝缘研究领域的热点.基于以上分析,研究了一种新型触头材料全武合金的真空绝缘性能,并将它与真空灭弧室常用触头材料CuCr25和CuCr50的绝缘性能进行了对比.首先对3种触头材料的真空灭弧室试品用升降法进行了雷电冲击试验,结果表明3种触头材料击穿电压的概率分布均符合Weibull分布,在触头开距为2～10mm范围内其50%击穿电压的关系为CuCr50＞全武合金＞CuCr25;然后对3种触头材料用升压法进行了工频击穿试验,结果表明当开距为1 m,升压速度为3 kV/s时,3种触头材料绝缘强度的关系为CuCr50≈全武合金≈CuCr25;最后对比了工频升压速度对全武合金绝缘特性的影响,结果表明当升压速度从3 kV/s降为1.5 kV/s时,击穿电压升高了1.6倍.
真空絕緣性能決定著真空滅弧室的設計及成本,在真空斷路器嚮高電壓等級髮展的揹景下真空絕緣性能研究顯得尤為重要.觸頭材料是影響真空絕緣性能的重要因素之一,因此新型觸頭材料真空絕緣性能的研究成為真空絕緣研究領域的熱點.基于以上分析,研究瞭一種新型觸頭材料全武閤金的真空絕緣性能,併將它與真空滅弧室常用觸頭材料CuCr25和CuCr50的絕緣性能進行瞭對比.首先對3種觸頭材料的真空滅弧室試品用升降法進行瞭雷電遲擊試驗,結果錶明3種觸頭材料擊穿電壓的概率分佈均符閤Weibull分佈,在觸頭開距為2～10mm範圍內其50%擊穿電壓的關繫為CuCr50＞全武閤金＞CuCr25;然後對3種觸頭材料用升壓法進行瞭工頻擊穿試驗,結果錶明噹開距為1 m,升壓速度為3 kV/s時,3種觸頭材料絕緣彊度的關繫為CuCr50≈全武閤金≈CuCr25;最後對比瞭工頻升壓速度對全武閤金絕緣特性的影響,結果錶明噹升壓速度從3 kV/s降為1.5 kV/s時,擊穿電壓升高瞭1.6倍.
진공절연성능결정착진공멸호실적설계급성본,재진공단로기향고전압등급발전적배경하진공절연성능연구현득우위중요.촉두재료시영향진공절연성능적중요인소지일,인차신형촉두재료진공절연성능적연구성위진공절연연구영역적열점.기우이상분석,연구료일충신형촉두재료전무합금적진공절연성능,병장타여진공멸호실상용촉두재료CuCr25화CuCr50적절연성능진행료대비.수선대3충촉두재료적진공멸호실시품용승강법진행료뇌전충격시험,결과표명3충촉두재료격천전압적개솔분포균부합Weibull분포,재촉두개거위2～10mm범위내기50%격천전압적관계위CuCr50＞전무합금＞CuCr25;연후대3충촉두재료용승압법진행료공빈격천시험,결과표명당개거위1 m,승압속도위3 kV/s시,3충촉두재료절연강도적관계위CuCr50≈전무합금≈CuCr25;최후대비료공빈승압속도대전무합금절연특성적영향,결과표명당승압속도종3 kV/s강위1.5 kV/s시,격천전압승고료1.6배.
Contact material is one of the key influential factors on vacuum dielectric performance.The dielectric performanee in vacuum of a new kind of contact material-Quanwu alloy is studied and compared with CuCr25 and CuCr50 contact material that are widely used in vacuum interrupters.First,basic impulse level(BIL)tests(1.2/50μs)were done by up-and-down method for the 3 contact materials.The BIL tests revealed that the breakdown probability distribution of the 3 contact materials followed Weibull distribution under different gaps.The 50% breakdown voltage of the 3 contact materials were in the order of CuCr50>Quanwu alloy>CuCr25 in the contact gap range from 2 mm to 10 mm.The power frequency dielectric test results show that the dielectric strength of the 3 contact materials is with CuCr50≈Quanwu alloy≈CuCr25 at contact gap 1mm when the rising rate of the power frequency voltage is 3 kV/s.Finally the influence of rising rate of power frequency on the dielectric performance of Quanwu alloy was studied.The results show that the breakdown voltage of Quanwu alloy increases 1.6 times when the rising rate decreases from 3 kV s to 1.5 kV/s.The experimental results show that the dielectric performance of Quanwu alloy is between CuCr25 and CuCr50 contact materials.
