抗干扰算法改进的发电机转子接地保护  

Generator rotor grounding protection improved by anti-interference algorithm

作　　者：朱宇聪 王树刚 桑建斌[1,2] 包明磊 李玉平[1,2] 陈福锋 ZHU Yucong;WANG Shugang;SANG Jianbin;BAO Minglei;LI Yuping;CHEN Fufeng(Guodian Nanjing Automation Co.,Ltd.,Nanjing 211100,China;Nanjing SAC Power Grid Automation Co.,Ltd.,Nanjing 211100,China;State Grid Jiangsu Electric Power Co.,Ltd.,Nanjing 210024,China)

机构地区：[1]国电南京自动化股份有限公司,江苏南京211100 [2]南京国电南自电网自动化有限公司,江苏南京211100 [3]国网江苏省电力有限公司,江苏南京210024

出　　处：《电力自动化设备》2022年第3期189-195,共7页Electric Power Automation Equipment

摘　　要：转子接地保护测量回路受励磁系统调节、谐波、非周期分量以及电磁干扰的影响较大,为提高转子接地保护的精度与可靠性,提出了一种基于采样数据筛选的抗干扰算法。所提算法避开了转子绕组等效对地电容充放电的暂态过程,采用软硬件滤波减小了谐波的影响,通过采样数据筛选减小电磁干扰的影响。对所提算法进行了试验验证,结果表明该算法有效提高了转子接地保护的精度与可靠性。The measurement circuit of the rotor grounding protection is greatly affected by excitation system regulation,harmonics,non-periodic components and electromagnetic interference.In order to improve the accuracy and reliability of rotor grounding protection,an anti-interference algorithm based on sampled data filtering is proposed.The proposed algorithm avoids the transient process of charging and discharging the equivalent grounding capacitance of the rotor winding,uses software and hardware filtering to reduce the impact of harmonics,and reduces the impact of electromagnetic interference through sampled data filtering.The test results verify that the proposed algorithm effectively improves the accuracy and reliability of the rotor grounding protection.

关 键 词：发电机 转子接地保护 直流采样 电磁干扰 强励 

分 类 号：TM77[电气工程—电力系统及自动化]