Current-Only Directional Overcurrent Protection for Distribution Automation: Challenges and Solutions

被引：64

作者：

Ukil, Abhisek ^{[1
]}

Deck, Bernhard ^{[2
]}

Shah, Vishal H. ^{[3
]}

机构：

[1] ABB Corp Res, CH-5405 Baden, Switzerland

[2] ABB Secheron SA, CH-5400 Baden, Switzerland

[3] ABB GISL Corp Res Ctr, Prod Dev & Integrat Grp, Vadodara, India

来源：

IEEE TRANSACTIONS ON SMART GRID | 2012年 / 3卷 / 04期

关键词：

Distance protection; fault direction; fault isolation; fault location; medium voltage; MV; phase angle; radial network; relay; ring-main unit; smart grid; subtransmission; voltage less direction; POWER-SYSTEMS; FREQUENCY; SIGNALS; RELAY;

D O I：

10.1109/TSG.2012.2208127

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：

Overcurrent relays are widely used for power systems protection. Transmission side uses more directional type relays, while distribution systems, e. g., radial and ring-main sub-transmission systems use nondirectional types. The fault direction may be forward (between relay and grid), or reverse (between relay and source), the normal power flow being from source to the grid. Traditional directional overcurrent relays utilize the reference voltage phasor for estimating the direction of the fault. This requires measurement of both current and voltage using respective sensors. This makes the directional overcurrent relays more costly than the nondirectional type. In this paper, a novel current-only directional detection possibility is highlighted along with theoretical, test signal analysis, challenges and associated solutions. Possible utilizations of the current-only directional relay in the distribution side protection are described, which is a key focus area for enabling the smart grid.

引用

页码：1687 / 1694

页数：8

共 22 条

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