A KALMAN FILTER BASED DIGITAL PERCENTAGE DIFFERENTIAL AND GROUND FAULT RELAY FOR A 3-PHASE POWER TRANSFORMER

被引：34

作者：

MURTY, YVVS

SMOLINSKI, WJ

机构：

[1] Department of Electrical Engineering, University of New Brunswick, Fredericton

来源：

IEEE TRANSACTIONS ON POWER DELIVERY | 1990年 / 5卷 / 03期

关键词：

D O I：

10.1109/61.57970

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：

This paper presents the design and real-time implementation of a Kalman filter based digital percentage differential and ground fault protection scheme for three phase power transformers. A set of eleven-state Kalman filters is used to estimate the fundamental and up to fifth harmonic components of the transformer current signals. The protective relay is equipped with an even harmonic restraint during magnetizing inrush conditions and a fifth harmonic restraint during overexcitation conditions. The restraint during external faults is provided by means of a percentage differential characteristic. The relay operates in half a cycle during internal faults. In order to achieve sensitive ground fault protection, seperate primary and secondary ground fault protection are provided. The relay algorithm is implemented on a single TMS320 digital signal processor and tested in real-time using a three phase laboratory power transformer. © 1990 IEEE

引用

页码：1299 / 1308

页数：10

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