基于改进谐波分析法的介损数字测量

Digital Dielectric Loss Measurement Based on Improved Harmonic Analysis Method

分析了用传统谐波分析法测量介损的原理以及该算法由于非同步采样造成的误差,提出了一种改进的谐波分析法。在等时间间隔采样条件下,先计算出实际的工频周期,再修正每个工频周期的实际采样点数,使之满足同步采样条件。将该改进算法在数字信号处理器中进行验证,结果表明,该算法精度比传统方法有显著提高,且适合在嵌入式处理器中实现。

On the basis of analyzing the principle of applying traditional harmonic analysis method to dielectric loss measurement and the measurement error caused by non-synchronous sampling of traditional method, an improved harmonic analysis method is proposed. Under the condition of sampling in equal time intervals, firstly the actual qual time interval is calculated to modify the number of samling points in each period of power frequency to meet the condition of synchrounous sampling. The proposed algorithm is validated by digital signal processor （DSP） TMS320F2812 and validation results show that measurement accuracy of the proposed algorithm is better than traditional algorithm and suitable to implement in embedded processor.