交流采样综合电量变送器的算法和误差分析

本文介绍了一种交流采样综合电量变送器的测量算法和设计技术要点，分析了仪表的误差来源：通道传输误差、电流互感器非线性误差、相位误差和频率混叠误差。论文提出了提高锁相同步的精度、减小通道误差和频率混叠等误差的方法。由于仪表采用了具有高Q模拟低通滤波器的锁相同步技术、内部动态校准与外校准相结合的免调整技术、采用较高的采样率和抗混叠滤波、相位补偿等技术，从而保证了仪表能适应谐波畸变严重的电网，并有良好的温度适应性。几项关键技术尚未见在国内其它的微机电量变送器中使用。

Algorithm and Error Analyzing of Microcomputer Multiple Power Parameter Transducer

In this paper the measurement algorithm of a multifunctional microcomputer power parameter transducer is presented. The errors of instrumentation, which includes the phase-locking synchronization error, the channel transfer error, the CT nonlinearity error, frequency alias error and phase error, are analyzed. The techniques of reducing the errors,phase-locking synchronization technique with high Q analog lowpass and adjusting-free design technique and antialias filtering and phase compensating, are advanced. The important design techniques guarantees favorable performance of the instrumentation.