中国电机工程学报2016，Vol.36Issue(6)：1739-1747,1788,10.DOI:10.13334/j.0258-8013.pcsee.2016.06.031
考虑CaSO4的盘形悬式绝缘子串交流污耐压修正研究
Study on AC Pollution Withstand Voltage Correction of Cap and Pin Insulator String Considering CaSO4
摘要
Abstract
ABSTRACT:Due to the presence of slightly soluble salts in natural contaminants, such as CaSO4, the pollution withstand voltage are different between artificial contaminants and natural contaminants under the same measurement equivalent salt deposit density (ESDD). In order to solve this problem, considering the influence of saturated absorption of water quantity, the equivalence between the ESDD of artificial contaminants (NaCl) and the ESDD of natural contaminants (NaCl and CaSO4) on the polluted insulators was studied from the perspective of the equivalent conductivity, and the formula for calculating the soluble contaminant density of mixed salt was also proposed. To combine with the solubility of CaSO4, the correction formula of insulator AC pollution withstand voltage was proposed, which considered the ESDD, NSDD and mass fraction of CaSO4in contaminants. The results from the correction formula were compared with the experiment data from artificial pollution test of a 7-unit double-shed XWP2-160 cap and pin porcelain insulator string. The results show that at a certain salt concentration, the conductivity of solution gradually decreases with the increase of CaSO4 mass fraction in the mixed salt. The maximum error between the calculation value using the correction formula and the experiment data is less than 7.2%. The results can be important reference for the correction of insulator AC pollution withstand voltage, external insulation design, operation and maintenance of transmission lines.关键词
盘形悬式绝缘子/CaSO4/等值盐密/附灰密度/污耐压/修正公式Key words
cap and pin insulator/CaSO4/ESDD/NSDD/pollution withstand voltage/correction formula分类
动力与电气工程引用本文复制引用
张虎,黄道春,徐涛,阮江军,李晓彬,熊紫腾,唐颖凯,万小东,南敬..考虑CaSO4的盘形悬式绝缘子串交流污耐压修正研究[J].中国电机工程学报,2016,36(6):1739-1747,1788,10.基金项目
国家电网公司特殊条件下输变电设备绝缘技术科技攻关团队项目(GY71-11-053)。 Project supported by the Program of Transmission and Transformation Equipment Insulation Technology Science and Technology Research Team of State Grid Corporation of China (GY71-11-053) （GY71-11-053）
