南方电网技术2024，Vol.18Issue(10)：1-10,10.DOI:10.13648/j.cnki.issn1674-0629.2024.10.001
基于离子流效应的同塔双回直流线路地线融冰感应过电压分析与抑制措施
Analysis of Induced over Voltage and Suppression Measures of Ground Ice Melting in Double Circuit DC Line on One Tower Based on Ion Current Effect
摘要
Abstract
In view of the ice melting of the ground wire of the deactivated line of a±500 kV double-circuit DC transmission line with the same tower,when the ground wire of the deactivated line is melted under the condition of"one shutdown and the other operating",the failure of the ice melting device and the breakdown of the automatic wiring device and the lightning arrester caused by excessive induced voltage are studied.According to the calculation and analysis of 6 working conditions,the overvoltage level induced on the shutdown line when the corona initiation voltage of the live running circuit conductor is calculated,and the overvoltage suppression level and line energy are comprehensively considered,and the overvoltage suppression measures with 5 kΩ grounding high resistance are proposed,which can realize the induction voltage of more than 100 kV to less than 20 kV,and the effectiveness is verified by the actual line ice melting operation.关键词
同塔双回/直流线路/地线融冰/离子流/感应过电压/抑制措施Key words
double circuit on one tower/DC transmission line/ground wire ice melting/ion current/induced overvoltage/suppres-sion measures分类
动力与电气工程引用本文复制引用
陈慧,陈潜,刘磊,刘宁,廖民传,谢桂泉,钟正..基于离子流效应的同塔双回直流线路地线融冰感应过电压分析与抑制措施[J].南方电网技术,2024,18(10):1-10,10.基金项目
国家自然科学基金资助项目(52107028) （52107028）
中国南方电网有限责任公司科技项目(CGYKJXM20220118). Supported by the National Natural Science Foundation of China(52107028) （CGYKJXM20220118）
the Science and Technology Project of China Southern Power Grid Co.,Ltd.(CGYKJXM20220118). （CGYKJXM20220118）
