摘要
通过对目前常用的一些融冰方法介绍分析可知,直流融冰方法是最理想、有效的方法。分析了直流融冰技术的基本理论,计算出不同类型线路的融冰电流和所需电源容量。设计出容量不同的固定式和移动式融冰装置用于不同电压等级的交流线路融冰。根据计算的南方电网典型高压直流输电系统的线路融冰保线电流,提出了不改变主回路结构采用一极功率正送,另一极功率反送的运行方式对直流线路进行保线的方法。借助实时数字仿真系统解决了高肇直流输电工程线路保线运行方式的关键技术。研究成果成功应用于高肇直流输电工程中,保障了系统在冬季覆冰时的安全可靠运行。
Through introducing and researching the commonly used methods of de-icing,the DC de-icing technology is considered the best and most effective method.The fundamental theory of DC de-icing technology is analyzed,and the de-icing current and required power capacity in different lines are calculated.The stationary and mobile de-icing equipments with different capacities are designed for different AC line de-icing at various voltage levels.According to the calculated critical de-icing current of typical HDVC of China Southern Power Grid,it proposes that the AC lines can be protected by keeping the original main circuit structure and adopting the operating mode in which one pole runs at a normal power transmission direction while the other pole runs at the reverse direction.The key technology of line protection in Guizhou-Guangdong HVDC project is solved with the help of real time digital simulator system.The research results are successfully applied to Guizhou-Guangdong HVDC project,and guarantee the safety and reliable operation of the system in winter when transmission lines are iced up.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2010年第21期57-62,共6页
Power System Protection and Control
