Using a PSCAD simulation software in calculating the probability of surge protective devices failure in an installation served by overhead lines

2011 International Conference & Utility Exhibition on Power and Energy Systems: Issues and Prospects for Asia (ICUE) Pub Date : 2011-09-01 DOI:10.1109/ICUEPES.2011.6497707

I. Hamzah, A. Q. Ramli

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Abstract

Surge protective devices (SPDs) are used in protecting low voltage distribution networks against lightning strike. Lightning strike not only produces overvoltage but also comes with discharge current. Even if the voltage is clamped by the SPD, the discharge current from the lightning strike may cause SPD to fail. Normally, people look at clamping voltage (voltage protection level) without looking properly at the maximum allowable energy of SPD. This paper looks in the SPDs failure on the low voltage installation which been served by overhead lines. In this paper, the work is done in order to calculate the probability of SPDs failure based on the actual lightning data in Malaysia. The peak current is a probability phenomenon. By looking at the probability of lightning peak current and location of those lightning activities, it is possible to calculate the kind of induced voltage to appear on the electrical installation. From the calculated results, a better selection of SPD size to be installed can be assured.

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利用PSCAD仿真软件计算架空线供电设施中浪涌保护装置失效的概率

浪涌保护装置(spd)用于保护低压配电网免受雷击。雷击不仅会产生过电压，还会产生放电电流。即使电压被防雷器钳住，雷击产生的放电电流也可能导致防雷器失效。通常情况下，人们只看夹紧电压(电压保护等级)，而不看SPD的最大允许能量。本文对架空线路供电的低压装置的spd故障进行了研究。本文的工作是根据马来西亚的实际雷电数据计算spd的失效概率。峰值电流是一种概率现象。通过观察闪电峰值电流的概率和这些闪电活动的位置，就可以计算出出现在电气装置上的感应电压的种类。根据计算结果，可以更好地选择安装SPD的尺寸。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

2011 International Conference & Utility Exhibition on Power and Energy Systems: Issues and Prospects for Asia (ICUE)

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