Rogowski线圈数字积分器的分析与设计

基于Rogowski线圈的电子式电流互感器在电网系统中的应用越来越广泛,其中积分器是影响电子式电流互感器的稳定性和精度的关键.针对Rogowski线圈的积分算法,分别给出模拟积分和数字积分2种算法的实现形式,其中数字积分有更高的精度和稳定性.对数字积分3种算法从原理上对各自幅频特性和相频特性进行了比较分析,并给出了一种数字积分器的设计方案,分析了其方案的可行性和实用性.设计了基于C8051F340单片机的数字积分器,结果验证了此方法的可行性.

Analysis and design of digital integrator based on Rogowski coil

Electronic current transformer based on Rogowski coil in power system is used more and more widely,and the integrator is the key to influence the stability and accuracy of electronic current transformer.For Rogowski coil＇s integral algorithm was given respectively both analog and digital two algorithm＇s forms for realization,and digital algorithm has a higher accuracy and stability.Three algorithms of digital algorithm are compared in principle of amplitude-frequency characteristic and phase frequency characteristics of analysis,and gives the design of a digital integrator which is analyzed its feasibility and practicability of the scheme.A digital integrator was developed based on C8051F340 MCU,and the results prove the feasibility of this method.