A New Two-Port Network Model-Based Pilot Protection for AC Transmission Lines

被引：25

作者：

Liu, Shiming ^{[1
]}

Zhang, Lu Liang ^{[2
]}

Fu, Chuanshun ^{[1
]}

Jiang, Lin ^{[3
]}

机构：

[1] Shandong Univ, Key Lab Power Syst Intelligent Dispatch & Control, Jinan 250061, Shandong, Peoples R China

[2] South China Univ Technol, Sch Elect Power Engn, Guangzhou 510640, Peoples R China

[3] Univ Liverpool, Dept Elect Engn & Elect, Liverpool L69 3BX, Merseyside, England

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 2020年 / 35卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Power transmission lines; Transmission line measurements; Transmission line matrix methods; Circuit faults; Current measurement; Voltage measurement; Synchronization; Pilot protection; transmission line; sequence components theory; two-port network; transmission network parameters; CURRENT DIFFERENTIAL PROTECTION; IMPEDANCE; SCHEME; RELAY;

D O I：

10.1109/TPWRD.2019.2904310

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：

Conventional pilot protections used for EHV/UHV ac transmission lines require data synchronization between the two terminals of transmission line, and their performances are affected by the line capacitive charging current and load conditions. To tackle these problems, this paper proposes a new pilot protection scheme based on two-port network model of ac transmission lines. The new protection scheme calculates the two-port network parameters from the online measurements via the sequence components method, and then compares the solved parameters with their setting values to distinguish the internal and external faults. It does not require the data synchronization between two terminals of the transmission line. Moreover, its performance is not affected by the line capacitive charging current and load conditions. The applicability of the proposed scheme for series compensated lines is also analyzed. Effectiveness and accuracy of the proposed protection scheme have been verified by simulation tests.

引用

页码：473 / 482

页数：10

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