【摘要】 在继电保护系统中常需测量一次侧大电流。电力系统中,一次侧电流变化范围很大,传统的方法难以满足要求。将Rogowsk i线圈和数字信号处理技术有机的结合,实现了在大电流范围内进行高准确度的测量。Rogowsk i线圈不饱和特性使之能够测量大范围的电流,结合数字信号处理的无零漂积分器的测量方法,消除了模拟信号调理电路的零点漂移,并把其非线性因素影响降低到比较低的水平,它测量大电流具有较高的准确度,实现简单,是一种测量宽范围变化的交流电流的较为理想的选择。更多还原

【Abstract】 Usually,in relay protection system,measurement of large range AC current is inevitable.This paper analyzes the measuring principle of AC current based on Rogowski coil and digital signal processing.Rogowski coil is suitable for measuring large range AC current.With digital signal processing technology,this measurement principle can eliminate zero drift,nonlinear error and capacity leakage.This principle can measure large range AC current precisely.更多还原