基于电桥平衡原理的高准确度tanδ在线测量  

Research on a New Monitoring Method of tanδ with Low Cost and High Precision

作　　者：陈天翔[1] 张保会[1] 陈天韬[1] 刘军虎[1] 张翰森 

机构地区：[1]西安交通大学电气工程学院 [2]兰州电力技术学院,兰州730000

出　　处：《高电压技术》2005年第1期42-44,共3页High Voltage Engineering

摘　　要：在分析微电流传感器工作原理和“零磁通”微电流传感器不足的基础上,提出了一种借鉴QS1西林电桥平衡原理的在线tanδ测量方法,该法用无源微电流传感器作平衡检流计,用微型计算机MCU实现的相位差测量技术 和移相技术使经过单匝电流传感器的标准电流和被测设备电流同相位同幅值来获得被测设备相位差,在测量过程 中融入抗环境电磁干扰和智能检测判断功能,排除标准电压信号源和外界干扰误差,使tanδ理论测量分辨率达6.9 ×10-5。分析和试验证明该测量系统抗干扰能力强,测量准确度高。By analysis of the operating principle of micro current sensor and the deficiency of Zero-flux micro current sensor, a new method of on-line monitoring of tanδ is presented, which is based on balance principle of QSI Schering bridge. Using passive micro current sensor as balance current tester, the system calculates the phase differences by a MCU computer. The techniques of anti environmental interference and intelligent monitoring are applied to enable the theoretical resolution of tanδ to reach to 6.9 × 10-5. The on site tests show that the system is with capabilities of high anti interference and high precision in monitoring.

关 键 词：零磁通 误差分析 TANΔ测量 新方法 

分 类 号：TM938[电气工程—电力电子与电力传动]