1000 kV特高压输电线路覆冰区的研究与划分

1 000 kV晋东南-南阳-荆门交流特高压试验示范工程是中国第一个特高压工程。为了加强该工程线路状态的运行管理,提高运行单位制定针对性的覆冰巡视、线路检修专项措施的工作效率,有必要对该工程线路进行覆冰区划分的研究。为此,笔者调查分析了该工程河南段输电线路覆冰的特征,通过对该工程河南段输电线路进行实地考察,收集并分析了省气象局提供的沿线历年气象资料,采集了沿线地形地貌图片,最后依据沿线气象条件和地形地貌特征确定了线路覆冰区的划分。实际应用表明,特高压输电线路覆冰区的划分为开展特高压输电线路覆冰在线监测、导线覆冰机理、冰情预测及防冰除冰技术的研究奠定了基础。

Research and Division of Icing Area along 1000 kV Ultra High Voltage AC Transmission Lines

The 1 000 kV AC power transmission project from Southeast Shanxi via Nanyang to Jingmen is the first ultra high voltage(UHV)project in China.In order to strengthen the operation and management of the project line’s condition,and to improve the work efficiency of the operating unit on establishing targeted inspections and special line maintenance measures,it is necessary for the research on the icing areas division along the transmission line.Therefore,firstly the icing characteristics for the transmission line project within Henan province is investigated in this paper,and then through make on-the-spot investigation to the transmission line within Henan,the meteorological data over the years along the lines which provided by meteorological bureau of Henani province is collected and analysed,and topography images information with on-the-spot investigation are taken,the finally based on the meteorological conditions and topography characteristics along the lines,the division of icing area within Henan are determined.Practical application results show that the division of icing areas for the UHV transmission lines lay the foundation for carrying out research on icing on-line monitoring,icing mechanism,ice forecast and anti-icing de-icing technology for the UHV lines.