摘要
直流盘形绝缘子的金具腐蚀问题严重威胁超/特高压线路的安全稳定运行,新型盘形悬式混合绝缘子理论上因其表面的高温硫化硅橡胶而使泄漏电流接近于复合绝缘子,可不加装锌环锌套,从而规避该问题,但当前缺乏试验数据对其耐电化学腐蚀性能进行论证。因此,选用含混合绝缘子在内的3种绝缘子试品开展加速腐蚀试验研究,在相同条件下对试品进行铁帽和钢脚的加速腐蚀试验,分别从表面腐蚀情况、腐蚀电流与腐蚀电荷量、腐蚀损失质量3个方面进行分析。研究结果表明,只有瓷绝缘子金具表面腐蚀痕迹明显,铁帽腐蚀试验中瓷绝缘子,工厂复合化绝缘子和混合绝缘子的腐蚀电荷量分别为10105 C、153 C和156 C,钢脚腐蚀试验中分别为7985 C、103 C和108 C。相同环境下,混合绝缘子运行30年的铁帽和钢脚的腐蚀状态仅与瓷绝缘子运行0.4年的状态相同,因此可不安装锌环锌套。
The fitting corrosion of DC disk-shaped insulators seriously threaten the safe and stable operation of UHV lines.In theory,the leakage current of new disk-shaped suspended hybrid insulator is close to that of composite insulator due to the high temperature vulcanized silicone rubber on the surface,and zinc rings and sleeves are not necessary to be installed to avoid this problem.However,there is a lack of test data to demonstrate its electrochemical corrosion resistance.Therefore,this paper selects three kinds of insulator test products including hybrid insulators to carry out accelerated corrosion test research.Under the same conditions,the accelerated corrosion test of iron cap and steel foot is carried out on the test products,and the surface corrosion condition,corrosion current and corrosion charge amount,and corrosion loss mass are analyzed.The results show that only the surface corrosion marks of porcelain insulators are obvious.The corrosion charges of porcelain insulators,factory composite insulator and hybrid insulator in iron cap corrosion test are 10105 C,153 C and 156C respectively,and those of steel foot corrosion test are 7985 C,103 C and 108 C.Under the same environment,the corrosion state of the iron cap and steel foot of the hybrid insulator running 30 years is only the same as that of the porcelain insulator running 0.4 years,so the zinc ring and zinc jacket can not be installed.
作者
杨凯洒
谭永殿
郑扬亮
李兴书
YANG Kaisa;TAN Yongdian;ZHENG Yangliang;LI Xingshu(Baise Bureau of China Southern Power Grid EHV Power Transmission Company,Baise,Guangxi 533000,China;Guangzhou Bureau of China Southern Power Grid EHV Power Transmission Company,Guangzhou,Guangdong 510600,China)
出处
《广东电力》
北大核心
2025年第6期39-45,共7页
Guangdong Electric Power
基金
中国南方电网有限责任公司科技项目(0106002022030301SD00001)。
关键词
混合绝缘子
金属附件
高温硫化硅橡胶
电化学腐蚀
当量折算
hybrid insulator
metal accessories
high temperature vulcanized silicone
electrochemical corrosion
equivalent conversion
