基于Rogowski线圈的数字积分器实用化研究  

Research on practicability of digital integrator based on Rogowski coil

作　　者：尹明[1] 田志国[1] 周水斌[1] 

机构地区：[1]许继电气技术中心,河南许昌461000

出　　处：《电力系统保护与控制》2010年第16期99-102,共4页Power System Protection and Control

摘　　要：积分器是基于Rogowski线圈的电子式电流互感器的关键环节。传统数字积分如梯形积分,因不能抑制低频干扰而无法工程应用。提出将模拟积分转换为数字积分,解决了直流饱和问题。并就工程中小信号误差大的问题,提出了应用可编程增益放大器(PGA),通过切换量程提高精度的解决方法。该做法已在TMS320F2812C上具体实现,在小信号时仍能达到0.2 S级精度。Integrator is the key element in an electronic current transducer based on Rogovski coil.C onventional integrator such as composed trapezoidal integral is not applicable to actual engineering project because of interference coming from low frequency signal.The paper proposes a method of translating analog integrator to digital integrator which solves DC saturation problem.In view of character that considerable measurement error is induced by small signal,p rogrammable gain amplifier（PG A） is applied to system and high accuracy is obtained through switching scale.The m ethod in this paper is implemented on TMS320F2812C and reached to 0.2 S class under the condition of small signal.

关 键 词：ROGOWSKI线圈 数字积分 双线性变换 小信号 可编程增益放大器 

分 类 号：TM452[电气工程—电器]