CAJ | 학술논문

为了研究不同硫化工艺对抗水树枝交联聚乙烯绝缘电缆击穿性能的影响,建立了相应的试验手段和评价程序。将使用相同导体屏蔽料、抗水树绝缘料、绝缘屏蔽料,并采用5种不同硫化工艺（A、B、C、D、E）生产的电压等级、型号规格相同且结构相似的电缆作为研究对象,每种电缆取6段作样品,共30段。分别对老化前和老化180d后的5种样品进行工频击穿试验,并观察击穿后样品切片的水树枝、界面微孔、突起和绝缘中的微孔、杂质。试验结果表明：经过180d的加速老化后,5种样品中均无微孔、界面光滑、有少量尺寸较小的杂质,不会导致击穿性能下降;不同硫化工艺生产的电缆工频击穿性能表现出明显差异,其中,A硫化工艺生产的电缆工频击穿强度下降了53.53%,击穿后的样品中观察到了水树枝,B、C硫化工艺生产的电缆工频击穿强度也有不同程度的下降,而D、E硫化工艺生产的电缆的工频击穿强度没有降低,说明硫化工艺对工频击穿强度有直接的影响,并建议实际生产中确定硫化工艺时,各区温度设定应逐渐降低,且初始硫化温度不应过低,生产线速度应适当。
위료연구불동류화공예대항수수지교련취을희절연전람격천성능적영향,건립료상응적시험수단화평개정서。장사용상동도체병폐료、항수수절연료、절연병폐료,병채용5충불동류화공예（A、B、C、D、E）생산적전압등급、형호규격상동차결구상사적전람작위연구대상,매충전람취6단작양품,공30단。분별대노화전화노화180d후적5충양품진행공빈격천시험,병관찰격천후양품절편적수수지、계면미공、돌기화절연중적미공、잡질。시험결과표명：경과180d적가속노화후,5충양품중균무미공、계면광활、유소량척촌교소적잡질,불회도치격천성능하강;불동류화공예생산적전람공빈격천성능표현출명현차이,기중,A류화공예생산적전람공빈격천강도하강료53.53%,격천후적양품중관찰도료수수지,B、C류화공예생산적전람공빈격천강도야유불동정도적하강,이D、E류화공예생산적전람적공빈격천강도몰유강저,설명류화공예대공빈격천강도유직접적영향,병건의실제생산중학정류화공예시,각구온도설정응축점강저,차초시류화온도불응과저,생산선속도응괄당。
To investigate the effect of various vulcanization methods on power frequency breakdown property of water treeing retardant XLPE power cable, the test method and quality evaluating program for breakdown property of water treeing retardant XLPE cable were built up. Water treeing retardant XLPE power cable samples with the same rated voltage, the same type and size, and similar structures were made by five different vulcanization methods (A, B, C, D, E) by using the same conductor shield material, the same insulation material and the same insulation shield material. Six samples for each vulcanization method and total thirty samples were made. All the samples were divided into two groups, including before aging and after 180 days accelerated aging. Then, all of the samples were tested one by one to investigate their AC breakdown strengths. Water treeing, void and protrusion in interface between insulation and semi-conductive shield, and void and contaminant in insulation in samples after breakdown were observed. Test results show that there are some small size contaminants and no voids in samples, and interface between insulation and semi-conductive shield are smooth, which can not decrease breakdown strengths. After 180 days aging, AC breakdown strengths of samples made by using a vulcanization method decrease by 53. 530//00 and water trees are observed, AC breakdown strengths of samples made by B and C vulcanization methods also decrease respectively, and AC breakdown strengths of samples made by D and E vulcanization methods do not decrease. The results show that there are direct effects of various vulcanization methods on power frequency breakdown performance of XLPE water treeing retardant power cable, the vulcanization method in practice is also proposed. It is suggested that temperatures in different vulcanization zone should become lower gradually, and the temperature of vulcanization zone 1 should he higher, and the product rate should be proper.