Suppressing Electrical Fast Transient Burst for Power Supply of Microprocessor Protection Device

WANG Yu-feng1; ZOU Ji-yan2; LIAO Min-fu2

doi:10.13296/j.1001-1609.hva.2010.03.022

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Suppressing Electrical Fast Transient Burst for Power Supply of Microprocessor Protection Device

更新时间：2025-04-26

- Suppressing Electrical Fast Transient Burst for Power Supply of Microprocessor Protection Device
- High VoltageApparatus Vol. 46, Issue 3, Pages: 10-14(2010)
- 作者机构：
  
  1. 辽宁科技大学
  2. 大连理工大学
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2010.03.022
  CLC： TM774
- Published：2010
- 稿件说明：
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[1]王玉峰,邹积岩,廖敏夫.微机保护装置电源抗电快速瞬变脉冲群的试验研究[J].高压电器,2010,46(03):10-14.

WANG Yu-feng1, ZOU Ji-yan2, LIAO Min-fu2. Suppressing Electrical Fast Transient Burst for Power Supply of Microprocessor Protection Device[J]. High voltageapparatus, 2010, 46(3): 10-14.
[1]王玉峰,邹积岩,廖敏夫.微机保护装置电源抗电快速瞬变脉冲群的试验研究[J].高压电器,2010,46(03):10-14. DOI： 10.13296/j.1001-1609.hva.2010.03.022.

WANG Yu-feng1, ZOU Ji-yan2, LIAO Min-fu2. Suppressing Electrical Fast Transient Burst for Power Supply of Microprocessor Protection Device[J]. High voltageapparatus, 2010, 46(3): 10-14. DOI： 10.13296/j.1001-1609.hva.2010.03.022.

摘要

为了避免电力系统中微机保护失灵事故的发生

通过试验研究抑制电快速瞬变脉冲群（EFT）对微机保护装置干扰的措施。首先

改善微机保护装置电源的供电结构

提出一种改进的分布式电源供电方式

增加一个DC 24 V/DC 24 V的开关电源模块

使输入到5 V和±15 V电源模块的24 V电源与驱动出口继电器的24 V工作电源隔离;其次

由于出口继电器操作时引起的EFT对微机保护装置的24 V工作电源有很大的干扰

建立出口继电器电磁耦合模型

制定采用续流二极管和电磁屏蔽措施来抑制二次回路的EFT;最后

在微机保护装置的电源端口并联瞬态抑制二极管和串联铁氧体磁珠来切断EFT从外部进入微机保护装置的途径。试验结果表明

上述措施可以有效抑制EFT对微机保护装置电源的干扰。

Abstract

In order to avoid malfunction of microprocessor protection device in power system

some countermeasures to protect the microprocessor protection device from electrical fast transient burst（EFT） are presented.At first

the structure of the protection device is improved by designing a distributed power supply

where a DC 24 V/DC 24 V power supply module is added to isolate the input of 5 V and ±15 V power supply module from the power supply of output relay.Then

an electromagnetic coupling model of output relay is set up to suppress the EFT induced in operation of output relay

which severely interfere the power supply of the microprocessor protection device.And fly-wheel diode and electromagnetic shield are adopted for to control the EFT interference.Finally

transient suppression diode and ferrite core are parallel connected at power supply port to cut off EFT coupling path from external into microprocessor protection device.The experimental results indicate that the above measures are effective to protect microprocessor protection device from EFT.

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The State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University

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