西安交通大学电力设备电气绝缘国家重点实验室,西安,710049
网络首发:2014-12-10,
纸质出版:2014
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金阳 1, 刘海峰 2, 郑晓泉 1, 等. 110 kV变电站高压裸线扩径增强绝缘护套研究[J]. 西安交通大学学报, 2014,48(12):34-40.
Diameter Expanding and Reinforced Insulation Jacket for High Voltage Bare Conductor in 110 kV Substation[J]. 2014, 48(12): 34-40.
金阳 1, 刘海峰 2, 郑晓泉 1, 等. 110 kV变电站高压裸线扩径增强绝缘护套研究[J]. 西安交通大学学报, 2014,48(12):34-40. DOI: 10.7652/xjtuxb201412006.
Diameter Expanding and Reinforced Insulation Jacket for High Voltage Bare Conductor in 110 kV Substation[J]. 2014, 48(12): 34-40. DOI: 10.7652/xjtuxb201412006.
为了减小110 kV变电站带电作业或改造施工时
人和施工车辆与高压裸线安全距离不够导致放电事故的概率
研究了3种用于减小110 kV变电站高压裸线最小放电距离的扩径增强绝缘护套
即带薄层绝缘金属扩径护套、非接触式带内半导电涂层的环氧筒护套和接触式带内半导电涂层环氧筒护套。估算了3种护套的最小放电距离及其与半导电层半径和扩径的关系
获得了扩径绝缘结构最佳尺寸
并得出了变电站高压裸线扩径增强绝缘的一般准则。研究中
以装有金属扩径护套的110 kV裸导线为例
进行了电场分布的有限元分析。理论计算和有限元分析表明:带薄层绝缘金属扩径护套的效果最佳
最小放电距离与高压裸线相比减小了60%; 接触式带内半导电涂层环氧筒护套防护效果与金属扩径护套相近
但只能短期使用; 非接触式带内半导电涂层环氧筒护套不能起到防护作用。
To reduce the probability of discharge between workers or vehicles and bare conductors in 110 kV substation
three new types of reinforced insulation jackets are designed and contrasted
including metal diameter expanding jacket
suspended epoxy insulation jacket
and electrically-contacted epoxy insulation jacket. The minimal discharge distance of those three types and its relationship with the diameter of semi-conducting coating and the expanded diameter is estimated theoretically to find the best size of expanded structure and general standard of diameter expanding jacket. Then a model of 110 kV bare conductor installing metal diameter expanding jackets is constructed to figure out the electric field distribution with finite element method. It is found that the metal diameter expanding jacket serves as the best choice
whose minimal discharge distance decreases by 60% compared with bare conductors
and the electrically-contacted epoxy insulation jacket has nearly the same effect in a short service period
while the suspended epoxy insulation jacket has no effect on the minimal discharge distance.
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