【摘要】 基于矩阵光学理论的数学分析 ,推导出光学电流互感器 (OCT)光电转换后输出电压信号的数学表达式 ;分析了OCT的相位误差来源及误差 ,论证出若两路电压信号的相差在 1 80°± 2 5 6°内 ,能达到IEC6 0 0 4 4 - 8标准对 0 .2级OCT的相位准确度的要求 ,否则 ,应采取相位补偿措施 ,将数字移相技术用于OCT中 ,满足IEC的要求更多还原

【Abstract】 The mathematics expression of photoelectric output signals of optical current transformer is deduced based on the theory of matrix optics. The phase error source of optical current transformer is studied and relative error analysis is proceeded. If the phase displacement between the photoelectric output signals of optical current transformer isn’t beyond 180° 2.56° , the phase error required by IEC6044 8 standard for 0.2 class OCT can be satisfied. Otherwise, phase compensation technique should be taken into account. And digital phase shifting technology is presented to be used in OCT so the output voltage signal of OCT can follow the current frequency variation within standard frequency range, thus meets the phase error requirements of 0.2 class.更多还原