Earth fault location based on evaluation of voltage sag at secondary side of medium voltage/low voltage transformers

被引：29

作者：

Topolanek, David ^{[1
]}

Lehtonen, Matti ^{[2
]}

Adzman, Mohd Rafi ^{[2
]}

Toman, Petr ^{[1
]}

机构：

[1] Brno Univ Technol, Fac Elect Engn & Commun, CS-61090 Brno, Czech Republic

[2] Aalto Univ, Sch Sci & Technol, Dept Elect Engn, Aalto, Finland

来源：

IET GENERATION TRANSMISSION & DISTRIBUTION | 2015年 / 9卷 / 14期

关键词：

earthing; fault location; power transformers; transformer substations; power supply quality; smart power grids; synchronisation; power meters; voltage sag evaluation; medium voltage-low voltage transformers; secondary side transformers; power quality meters; distribution transformer substations; power quality monitoring; electrical network global evolution; smart grid; earth fault localisation; compensated neutral distribution networks; auxiliary resistor; fault current; numerical model;

D O I：

10.1049/iet-gtd.2014.0460

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 main reasons for installation of power quality meters in distribution transformer substations are power quality monitoring and global evolution of electrical network towards the smart grid'. In case that all measurements from the meters are properly synchronised and centralised, new possibilities of control or evaluation of the network are enabled. This contribution proposes the possibility for an earth fault localisation with the aid of synchronised data recorded on the low-voltage side of the medium voltage/low voltage transformers in compensated neutral distribution networks which are equipped with auxiliary resistor for short-time increasing of the active part of the fault current. The described method uses voltage sags evoked by connecting of the auxiliary resistor for locating the faulty section. The proposed method is tested with the help of numerical model which presents a part of the distribution network.

引用

页码：2069 / 2077

页数：9

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