【作者】 曹小拐；

【导师】 杨奇逊；

【作者基本信息】 华北电力大学（北京） ， 电力系统及其自动化， 2003， 硕士

【摘要】 随着变电站自动化技术的发展和控制设备的分散就地布置，二次设备的工作环境更加恶劣。本文针对这种情况下微机保护的电磁兼容问题进行了研究。首先探讨了骚扰源的形成、特征及其传播到二次回路的途径，然后从骚扰源着手对变电站骚扰引起保护不正确动作的几个突出问题进行了研究；从敏感设备入手对保护的各个端口的抗扰度进行了研究。对一种典型的超高压线路保护CSL－101B在华北电力大学（保定）部级重点实验室进行了全面的抗扰度试验，对试验中出现的问题进行了分析并提出解决方案。另外，为解决浪涌问题探讨了微机保护的系统地的接地方式。更多还原

【Abstract】 With the development of substation automation and local installation of control device, the electromagnetic environment of substation become more severe than before. First, the typical feature and coupling channel of disturbance source are considered. And then, the prominent problems about uncorrect action of protective relays for disturbance are discussed. Furthermore, the immunity of different ports in protective device has been thoroughly studied in this desertion. Based on analyses and researches above, the experiments on CSL-101B, typical UHV transmission line protection, had been made and the possible methods to solve the problems appeared in these experiments are also proposed in this paper. At the end, in order to solve surge problem, the various earthing modes of system earth in protection device are analyzed. Cao Xiaoguai (Electric Power System and Automation)Directed by prof. Yang Qixun更多还原