Failure Risk of UHV AC Transmission Line Considering the Statistical Characteristics of Switching Overvoltage Waveshape

被引：19

作者：

Li, Yang ^{[1
]}

He, Jinliang ^{[1
]}

Yuan, Jun ^{[2
]}

Li, Chen ^{[1
]}

Hu, Jun ^{[1
]}

Zeng, Rong ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Elect Engn, State Key Lab Power Syst, Beijing 100084, Peoples R China

[2] State Grid Corp China, Construct Dept, Beijing 100031, Peoples R China

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2013年 / 28卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Failure risk; switching overvoltage; transmission line; ultra-high-voltage (UHV) AC system; wavefront time; waveshape; LONG AIR-GAPS; TOWER INSULATION; SURGE FLASHOVER; STRENGTH; COORDINATION; BREAKDOWN; TESTS; SHAPE;

D O I：

10.1109/TPWRD.2013.2252238

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

The sizes of ultra-high-voltage (UHV) towers and substations are related to the air clearances which are usually determined by switching overvoltage. Based on electromagnetic transient simulation of the first 1000-kV UHV ac transmission line in China, this paper extracted the effective wave information in accordance with the concept of the active part of the waveshape from calculated main types of switching overvoltage. Moreover, based on test results of switching impulse flashover voltages, a practical and accurate method to calculate the risk of failure was presented, which considered the variable characteristics of the insulation strength of the transmission line under different switching overvoltage waveshapes. Evaluation of the results focused on the comparison between two new methods and the traditional simplified method considering the effect of the front time.

引用

页码：1731 / 1739

页数：9

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