DTTP-2000 digital traction transformer protection

被引：0

作者：

Bi, Daqiang ^{[1
]}

Feng, Cunliang ^{[2
]}

Yu, Gaowang ^{[3
]}

Ge, Baoming ^{[2
]}

机构：

[1] State Key Laboratory of Power Systems, Department of Electrical Engineering, Tsinghua University, Beijing 100084, China

[2] School of Electrical Engineering, Beijing Jiaotong University, Beijing 100044, China

[3] Technology Center of XJ Group Company, Xuchang 461000, China

来源：

Dianli Zidonghua Shebei/Electric Power Automation Equipment | 2012年 / 32卷 / 12期

关键词：

Electric currents - Electric instrument transformers - Relay protection - Electric grounding - Electric power system protection;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A kind of digital traction transformer protection is developed, which combines the second harmonic principle with the waveform comparison principle to block the differential protection, preventing its misoperation caused by magnetizing inrush. The increment differential protection is introduced to offset the low sensitivity of percentage differential protection during slight inter-turn fault and high impedance grounding fault. Criterions are set to prevent the misoperation caused by current transformer saturation and sympathetic inrush. The hardware and software platforms are built based on the new-generation 32-bit DSP and the RTOS system NUCLEUS PLUS respectively. The protective functions are tested by dynamic simulation and numerical simulation, verifying that the developed protection device has excellent performance against current transformer saturation, slight inter-turn fault and sympathetic inrush.

引用

页码：102 / 106

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