中国电力 ›› 2013, Vol. 46 ›› Issue (5): 34-37.DOI: 10.11930/j.issn.1004-9649.2013.5.34.3

• 安全专栏 • 上一篇    下一篇

特高压双回输电线路耐雷计算方法

耿厚花   

  1. 国核电力规划设计研究院,北京 100095
  • 收稿日期:2013-02-08 出版日期:2013-05-05 发布日期:2015-12-14
  • 作者简介:耿厚花(1969—),女,硕士,高级工程师,从事输变电设计研究。E-mail: ghh03@126.com
  • 基金资助:
    国家核电技术公司自主创新资助项目(SNP-KJ-CX-2012-06)

Study on Lightning Withstand Calculation Algorithm for Double Circuit Transmission EHV Line

GENG Hou-hua   

  1. State Nuclear Electric Power Planning Design & Research Institute, Beijing 100095, China
  • Received:2013-02-08 Online:2013-05-05 Published:2015-12-14

摘要: 工程中通常采用电气几何模型法分析线路的耐雷性能。传统电气几何模型法不考虑导线之间的相互影响,对于双回输电线路,计算结果存在误差。分析了误差产生的原因,对双回输电线路,考虑导线之间的相互影响,提出一种新型的电气几何模型。针对垂直地面入射的雷电流,计算线路的击距曲线交点;将这些交点根据雷电流入射角度的变化映射到不同的几何空间,求解相应空间下的交点坐标。以淮南—沪西1 000 kV线路工程为例,应用新方法分析特高压双回输电线路的绕击耐雷性能。计算结果表明,绕击跳闸率随保护角、杆塔呼高、导线层间距离的增大而增大。

关键词: 特高压, 线路, 耐雷计算, 电气几何模型

Abstract: The electrical geometry model algorithm is a major one to analyse the lightning withstand level of transmission line in engineering. For the traditional algorithm, the interrelation among conductors are not considered. The calculating result for double circuit lines will have some error. The reason is studied firstly. Then, a new electrical geometry model is studied to consider the effect of conductors. Then, a new algorithm is studied for the new model. intersection coordinates of striking distance are obtained when lightning injects vertically to the ground. Secondly, coordinates and mapped to different geometrical space according to changing of lightning injection angle. At last, the lightning withstand level of double circuit EHV transmission line is calculated based on the new algorithm according to Huainan~Huxi 1 000 kV transmission line project. And the protection angle value is commended.

Key words: extra-high voltage, transmission line, lightning withstand calculation, electrical geometry model algorithm

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