基于LabVIEW和DSP的容型设备介损在线检测  

LabView and DSP-based New Measuring System for Dielectric Loss

作　　者：武政[1] 严学文[2] 

机构地区：[1]西安铁路职业技术学院,陕西西安710014 [2]西安邮电学院电信系,陕西西安710121

出　　处：《现代电子技术》2011年第18期153-157,共5页Modern Electronics Technique

摘　　要：提出了一种介损数字化测量的二次DFT算法,并给出实现该算法的具体步骤。然后在给定的计算精度要求下通过仿真,确定出使用该算法所需处理器的计算速度、硬件采样分辨率、采样频率、相应的存储器容量的要求,并以此为依据,研制出一套基于TMS320F2812型DSP处理器的新型分布式介损在线检测设备,该系统相比于单片机加过零法的传统方案,减少了锁相环,外部AD等模拟环节,更加简单可靠。测试结果表明,该系统能有效提高tanδ的测量精度。An improved secondary DFT algorithm is proposed for measuring dielectric loss. The specific steps of realizing the algorithm is given in this paper. The generating mechnism of malajustment by power network undulation is discussed. Ac- cording to the requirements of the defined calculation accuracy, the simulation is conducted to confirm the compulation speed, hardware sampling resolution, sampling rate and corresponding memorizer capacity of the processer that needs for application of the method. Based on simulation results, a distributed dielectric loss on-line detecter based on TMS320F2812 digital signal processor （DSP） was developed. The results of simulation indicate that the dielectric loss angle can be detected accurately. This system does not need the phase-locked loop and external AD, reduces other simulation links, and is more simple and reliable in comparison with the traditional systems. The detected results indicate the system can effectively improve the detec- ting accuracy of tanδ, and is suitable for the on-line monitoring of capacitive equipments.

关 键 词：介质损耗 在线检测 非同步采样 频率修正 离散傅里叶变换 虚拟仪器 

分 类 号：TN919-34[电子电信—通信与信息系统] TM835.4[电子电信—信息与通信工程]