基于智能开入的抗干扰保护装置研究  

Research on Anti⁃interference Protection Device Based on Intelligent Input

作　　者：闫茂华[1] 温才权[1] 黄义华 李宁[1] 刘英男 YAN Maohua;WEN Caiquan;HUANG Yihua;LI Ning;LIU Yingnan(Wuzhou Bureau of China Southern Power Grid EHV Transmission Company,Wuzhou 543002,China;School of Electrical Engineering,Shandong University,Jinan 250061,China)

机构地区：[1]中国南方电网有限责任公司超高压输电公司梧州局,广西梧州543002 [2]山东大学电气工程学院,山东济南250061

出　　处：《山东电力技术》2022年第1期41-46,共6页Shandong Electric Power

基　　金：中国南方电网科技项目“提高二次系统抗干扰性能关键技术研究”(CGYKJXM20180555)。

摘　　要：针对二次回路易受外部干扰从而导致保护开入回路不正确动作的问题,从工程应用出发,分析二次回路常见故障特征,建立二次回路故障模型,结合计算提取出不同的故障特征量,并结合智能开入插件给出相应的设计方案,提出一种能够监测相应故障特征量的智能开入回路,通过监测相应特征量预警二次回路故障。采用基于数字隔离的ADC采样架构,安全准确采集电气量并计算,通过采集结果智能开入插件能够有效识别出常见二次回路故障,集成于继电保护装置中的智能开入,可实现与保护的无缝衔接,实现更快的动作速度。基于智能开入的抗干扰保护装置研究,在现有保护装置的基础上,提出新型的保护装置原理,优化现有的保护硬件、软件逻辑,进一步提高保护装置的抗干扰能力。The secondary circuit is vulnerable to external interference,resulting in incorrect action of the protection input circuit.Starting from the engineering application,the common fault characteristics of the secondary circuit were analyzed.The secondary circuit fault model was established,different fault characteristic quantities were extracted combined with calculation,and the corresponding design scheme was given combined with the intelligent input plug⁃in.An intelligent input circuit which can monitor the corresponding fault characteristic quantity was proposed to warn the secondary circuit fault by monitoring the corresponding characteristic quantity.The ADC sampling architecture based on digital isolation was adopted to safely and accurately collect and calculate the electrical quantity.Through the collection results,the intelligent input plug⁃in can effectively identify common secondary circuit faults.The intelligent input integrated in the relay protection device can realize seamless connection with the protection and achieve faster action speed.Based on the existing protection devices,the anti⁃interference protection principle based on intelligent input was proposed,the existing protection hardware and software logic were optimized,and the anti⁃interference ability of the protection device was further improved.

关 键 词：二次回路 抗干扰 故障特征 智能开入 

分 类 号：TM774[电气工程—电力系统及自动化]