Sagnac型光纤电流互感器数据同步的研究
针对Sagnac型光纤电流互感器进行了数据同步方法的研究。根据Sagnac型光纤电流互感器数字闭环信号检测原理，确定了基于插值的数据同步方法。为了提高测量精度和实时性，提出了基于高采样率的线性插值的数据同步技术，并对其误差进行了理论与仿真分析。结果表明，采样率为200点／周波的线性插值法能够实现互感器的数据同步，并且其稳态下的幅值、相位误差分别小于0．014％、0．12′，暂态下的幅值、相位误差分别小于0．2％、1．2′，均远远低于IEC60044—8标准规定的0．2级电流互感器的误差限值，因此该算法不影响电流互感器的精度。...
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| Published in: | 电力系统保护与控制 Vol. 40; no. 8; pp. 38 - 43 |
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| Main Author: | |
| Format: | Journal Article |
| Language: | Chinese |
| Published: |
北京航空航天大学仪器科学与光电工程学院,北京,100191
2012
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| Subjects: | |
| Online Access: | Get full text |
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| Summary: | 针对Sagnac型光纤电流互感器进行了数据同步方法的研究。根据Sagnac型光纤电流互感器数字闭环信号检测原理，确定了基于插值的数据同步方法。为了提高测量精度和实时性，提出了基于高采样率的线性插值的数据同步技术，并对其误差进行了理论与仿真分析。结果表明，采样率为200点／周波的线性插值法能够实现互感器的数据同步，并且其稳态下的幅值、相位误差分别小于0．014％、0．12′，暂态下的幅值、相位误差分别小于0．2％、1．2′，均远远低于IEC60044—8标准规定的0．2级电流互感器的误差限值，因此该算法不影响电流互感器的精度。 |
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| Bibliography: | Sagnac fiber optic current transformer; data synchronization; linear interpolation; error analysis; amplitude error;phase error Data synchronization method based on Sagnac fiber optic current transformer （S-FOCT） is discussed. According to the digital closed-loop signal detecting principle of S-FOCT, data synchronization method based on interpolation is ascertained. In order to improve the measuring precision and real-time performance, data synchronization technology based on linear interpolation with high sampling frequency is presented, and the work of simulation and error analysis are finished. The simulation result shows that linear interpolation method with the sampling frequency of 200 points per period can meet the requirement of the data synchronization of S-FOCT. And static amplitude error can reach less than 0.014%, phase error less than 0.12′, transient amplitude error less than 0.2%, and phase error less than 1.2′, which are much less than the limited values of error regulated in IEC60044-8 standar |
| ISSN: | 1674-3415 |
| DOI: | 10.3969/j.issn.1674-3415.2012.08.007 |