NDLI: Statistical analysis on measured lightning overvoltage surges in a 110 kV air-insulated substation

Content Provider	IET Digital Library
Author	Sima, Wenxia Lan, Xing Yang, Qing Yuan, Tao
Abstract	The wide variety of lightning stroke characteristics and the modifying effects of power system components result in a diversity of intrusive lightning voltage waveshapes that stress transformers. These are not the traditional standard lightning impulses with a waveshape of 1.2/50 μs. Therefore the applicability of the standard lightning impulse voltage to power transformer testing has been questioned, and the overvoltage used in the test on transformers should be in accordance with the lightning overvoltage measured in the field. In this study, a lightning overvoltage monitoring system was installed in a 110 kV air-insulated substation, and the lightning overvoltages from 2007 to 2012 have been measured. Analysis was conducted on the measured data, which indicated that bidirectional oscillatory lightning waveforms rose up in the measured overvoltages. Using the energy method, the bidirectional oscillatory lightning waveform was reformulated into double exponential waveform, and the characteristic parameters, such as peak amplitude, front time and tail time, of the measured data were statistically analysed.
Starting Page	28
Ending Page	36
Page Count	9
ISSN	17518822
Volume Number	9
e-ISSN	17518830
Issue Number	Issue 1, Jan (2015)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-smt/9/1
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-smt.2013.0235
Journal	IET Science, Measurement & Technology
Publisher Date	2014-06-10
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Air Insulated Substation Air Insulation Bidirectional Oscillatory Lightning Waveform Energy Method Exponential Waveform Inorganic Insulation Intrusive Lightning Voltage Wavehape Diversity Lightning Overvoltage Monitoring System Lightning Overvoltage Surge Measurement Lightning Protection Lightning Stroke Characteristic Overvoltage Protection Power System Component Power System Measurement Power System Measurement And Metering Power System Protection Power Transformer Insulation Power Transformer Testing Standard Lightning Impulse Voltage Statistical Analysis Statistics Substation Insulation Substations Surge Protection Transformer And Reactors Transformer Stress Voltage 110 KV Voltage Measurement Waveform Analysis
Content Type	Text
Resource Type	Article
Subject	Atomic and Molecular Physics, and Optics Electrical and Electronic Engineering

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