电测与仪表Issue(12)：91-95,5.
变压器近区短路电流在线监测设备的研制
Online Monitoring Equipment of Transformer Nearby Short-Circuit Current
谢剑峰 1秦成 1黄澜涛 1徐懿2
作者信息
- 1. 华中科技大学电气与电子工程学院，武汉430074
- 2. 江苏省电力公司检修分公司，江苏常州213164
- 折叠
摘要
Abstract
When a short-circuit fault occurs on the secondary side of 110kV transformer, a large current may flow through transformer windings. Under the repeated shorts the transformer would be damaged. To solve this problem, an on line monitoring equipment is introduced in the paper to detect the three phase short-circuit current using the four-wire method. An auto-range measuring circuit based on CPLD is designed to solve the problem of wide signal range and low sampling accuracy. To enhance data processing capability and system scalability, TMS320F2812 and LPC2220 are employed as embedded microprocessors, and a dual-port RAM is used to perform data interaction. The equipment can collect real-time current data both in normal operation and in fault states. Using the acquisition data, the characteristic values can be calculated with FFT, and the waveform of short-circuit current can be stored. Application of the monitoring equipment provides a real and reliable basis for evaluation of the transformer during the maintenance of the power grid.关键词
四线法/量程自适应/双口RAM/DSP/ARMKey words
four-wire method/auto-range circuit/dual-port RAM/DSP/ARM分类
信息技术与安全科学引用本文复制引用
谢剑峰,秦成,黄澜涛,徐懿..变压器近区短路电流在线监测设备的研制[J].电测与仪表,2013,(12):91-95,5.
