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一种提高差分式光学电流互感器磁场抗扰度的新方法

, PP. 157-163

Keywords: 直通光路,差分式光学电流互感器,磁场抗扰度,相间磁干扰,最佳方位角

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Abstract:

针对差分式光学电流互感器抗外磁场干扰能力差的问题,提出一种提高其磁场抗扰度的新方法。建立差分式光学电流互感器的磁场抗扰度数学模型,研究不同布置方式下差分式光学电流互感器的磁场抗扰度特性。研究表明,传统布置方式下差分式光学电流互感器的磁场抗扰度小,是导致其抗外磁场干扰能力差的根本原因。研究发现,差分式光学电流互感器总存在4个磁场抗扰度无穷大的环外P点,据此提出一种最佳方位角优化方案,并给出最佳方位角的计算方法。试验结果表明,差分式光学电流互感器采用最佳方位角优化方案时,相间干扰引起的误差小于0.08%,与传统布置方式相比减少一半。试验结果证明了最佳方位角优化方案的正确性与实用性。

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