【摘要】 为提高电子式电流互感器测量精度,在此对高压侧电路进行了改进,提出了目前新的设计方案。主要叙述了Rogowski线圈、高压侧电源、高压侧信号处理电路即积分电路、移相电路的改进情况。通过采用新型罗氏线圈可使线圈均匀绕制和每匝线圈横截面相等,克服了传统罗氏线圈的缺点。提出了一种新的高压供电方案,使供电电路能够在母线大电流和空载小电流下仍能正常工作,提供稳定的输出电压,有效解决了电子电流互感器高压侧电源问题。介绍了数字积分器,采用积分算法设计的数字积分器具有更高的精度和稳定性,相位特性优良。同时提出基于贝塞尔滤波器的全通恒时延滤波器,其幅度特性恒定,而且在低频范围内具有恒定的延迟时间。更多还原

【Abstract】 This text carried on the improvement on circuit design for high-voltage in order to improve the accuracy of active current transducers,putting forward the new design projects currently. Mainly it described the improvable circumstance of the coil of Rogowski ,power in high voltage side and signal processing circuits of the high voltage side namely integral circuit,circuit of shifting phase. Applying new rogowski coil can make the coil being coiled uniform and thecross section of the per circle coil are equal ,it overcomes the weakness of the traditional rogowski coil ,the sensitivity,the accuracy and the stabilities are better than the traditional rogowski coil that be coiled by the copper line.A new power method is put forward. It supplies steady voltage for high voltage side circuit of active electronic current transducer during a high voltage halt in an in sufficient current state and power supply for the high voltage unit is able to be solved. Integral methods of the numerical integral circuit are introduced,which are compared with ideal integrator,the numerical integrator that adopts the integral methods contains higher accuracy and stabilities,phase characteristic is good. A all-pass with constant time delay based on Bessel filter is Put forward at the same time,its amplitude response is constant ,there are constant relay time within the scope of low frequency.更多还原