Application of the leader progression model in the insulation flashover criterion for lightning performance calculation

作者：Chen Xiaoyue^*; Wen Xishan; Lan Lei

来源：Lecture Notes in Electrical Engineering, 2015, 334: 459-466.

DOI：10.1007/978-3-319-13707-0_50

• Characteristic curve
• Insulation breakdown
• Intersection method
• Leader progression models
• Lightning impulse
• Lightning performance
• Reflection and refractions
• Volt-second characteristic

It is rather important to exactly evaluate the lightning withstanding level of the transmission line for the system service and the stable operation. In the course, the intersection method is usually adopted as the insulation flashover criterion in the practical project. But due to the difference of the nature lighting waveform and the standard lighting waveform (1.2/50 us), and the effect of the reflection and refraction in the lightning progression process, it may cause a large error by using the intersection method based on the volt-second characteristic curve, which is obtained from the standard lighting impulse in engineering. Several methods of estimating the insulation flashover are in use today. In general, these methods can be divided into those based on the conclusion of insulation breakdown and those derived from the breakdown process. The leader progression model used by CIGRE is one of those methods. In this chapter, several estimation methods of the insulation flashover are investigated and compared. A new insulation flashover criterion is proposed herein on the basis of the experimental results of the leader progression model and the CIGRE insulation flashover criterion. The application of this simulation model and the flashover time under standard lightning impulses are calculated to obtain the volt-second characteristic curve, which corresponds to the results obtained by the experiment.

• 出版日期2015