介损角的非同步采样算法及其应用

分析了介质损耗角数字化测量的原理、算法及存在的问题.提出了一种非同步采样条件下采用基波相位分离法的补偿算法,即采用等时间间隔对电压、电流信号进行采样,同时对信号周期波动产生的误差进行补偿,并介绍了基于该算法的测量系统的硬件实现方案.仿真和试验结果表明该算法在增加较少运算量的同时提高了介质损耗角的测量精度.

ALGORITHM AND APPLICATION OF DIELECTRIC LOSS ANGLE BASED ON ASYNCHRONOUS SAMPLING

The authors analyzed the principle, algorithm and existing problems of digital measurement of dielectric loss angle, and proposed an algorithm for fundamental harmonic phase separation under asynchronous sampling, i.e., the voltage and current signals were sampled by equal time intervals and the errors caused by the signal period fluctuation were compensated. The hardware implementation for a measuring system based on this algorithm was described. The results of simulation and tests indicate that using the proposed algorithm the dielectric loss angle can be measured more accurately while less calculation amount is increased.