摘要:伴随着这些年来随着我国继电保护技术和计算机技术的快速发展，微机型继电保护系统在变电站电力系统中已经得到了极为广泛的应用。微机保护系统已成为当前变电站二次设备的主要组成部分。由于目前变电站本身已经成为一个巨大的电磁网，这种强电磁网必然会对电力设备产生各种电磁干扰，特别是对变电站微机保护装置的影响尤为严重。所以对变电站以微机保护装置为主的二次回路进行综合分析和研究，并且采取一些必要的抗干扰措施，同时对变电站微机保护装置进行有针对性的防护就显得非常重要了。

　　　本文以35kV变电站为例，首先详细分析了35kV变电站电力系统二次回路的干扰源和其传播途径，并对占35kV变电站二次回路主要部分的变电站微机保护系统做了简要介绍，然后对目前35kV变电站电力系统中各微机保护装置的常用抗干扰措施进行了研究和探讨，提出了对整个35kV变电站二次回路以及微机保护装置所要采取的必要抗干扰措施，最后介绍了在35kV变电站实际运行中出现的几种典型干扰及其应对措施和在变电站实际建设工程中所采取的抗干扰措施。

关键词：变电站；微机保护；抗干扰；措施

ABSTRACT:In recent years, with the technology and computer technology, the rapid development of China's power industry technology relay, substation power systems, microprocessor-based relay protection system has been applied very widely. Protection system has become the main city part of the substation secondary equipment. The electromagnetic network is inevitable due to the substation itself is a huge network of electromagnetic power equipment electromagnetic interference, especially for weak computer protection device. And electrical equipment within the substation power system operation, electrical equipment around the electrostatic field and the magnetic field, corona and electromagnetic radiation caused by electromagnetic interference, can easily result in incorrect operation of computer protection device. Therefore a comprehensive analysis of the substation secondary circuit configuration of the microcomputer protection and research, to take the necessary anti-jamming measures targeted protection is particularly important.

　　　This article first detailed analysis of the sources of interference in the secondary circuit 35kV substation power system and the route of transmission, and accounted for the 35kV substation secondary circuit of the main part of the substation computer protection system gives a brief introduction, and then the computer substation power system protection devices commonly used anti-jamming measures studied and discussed the necessary anti-jamming measures to be taken on the entire 35kV substation secondary circuit as well as the computer protection device, and finally appear in the actual operation of 35kV substation several typical interference and response measures and anti-jamming measures taken in substation construction project.

Keywords: substation; microcomputer protection; interference; measures.