一种新的相位(差)算法及其在自动准同期中的应用

A new phase algorithm and its application to automatic synchronism equipment

介绍了一种基于电力线数字化采样计算电压相位(差)的方法.通过对数字化采样进行傅立叶变换获得电压的实部和虚部,动态地求取相位角的正弦值或余弦值,然后采用其反函数的泰勒级数二项式得到相位角度.在进行角度计算时,采用了归结到计算小角度的补偿措施.整个算法在微机自动准同期装置中得到成功应用.

A new phase difference algorithm based on digital sampling is proposed. The algorithm is implemented by Fourier transform to obtain the real part and imaginary part of voltage based on digital sampling; and by trigonometric function to gain the sine or cosine dynamically; and then by Taylor series binomial of arc sine function to acquire the actual angle. An offset measure translating to calculating narrow-angle is adopted in calculating the actual angle. This algorithm has been applied to automatic synchronism equipment successfully.