| 一种用于电子式互感器相位补偿的数字移相方法 |
| |
| 作者姓名： | 程含渺 徐晴 纪峰 穆小星 陈刚 田正其 胡琛 |
| |
| 作者单位： | 国家电网公司电能计量重点实验室(国网江苏省电力公司电力科学研究院), 江苏 南京 210019;华中科技大学电气与电子工程学院, 湖北 武汉 430074 |
| |
| 基金项目： | 国家自然科学基金项目(51507091);国家电网公司科技项目:智能变电站电子式互感器复杂环境下运行性能评估关键技术研究 |
| |
| 摘 要： | 电子式互感器的采集器在采样模拟信号时一般有固定的相位误差,影响了测量准确度,需要使用移相方法校正相位误差。针对数字移相方法,提出了基于最小二乘拟合的数字移相算法,推导出了数字移相递推式,并仿真分析了移相算法的性能。结果表明,该算法均具有较高的移相分辨率和移相精度,且能保证幅值准确度。将该算法应用于基于Rogowski线圈的电子式互感器,准确度比较测试验证了该算法的可行性和有效性。
|
| 关 键 词： | 电子式互感器 相位偏差 数字移相 最小二乘拟合 |
| 收稿时间： | 2016/11/7 0:00:00 |
| 修稿时间： | 2017/1/9 0:00:00 |
A Digital Phase-shift Method for Phase Compensation of Electronic Instrument Transformers |
| |
| Authors: | CHENG Hanmiao XU Qing JI Feng MU Xiaoxing CHEN Gang TIAN Zhengqi HU Chen |
| |
| Affiliation: | State Grid Key Laboratory of Electrical Power Metering(State Grid Jiangsu Electric Power Company Research Institute), Nanjing 210019, China; SEEE Huazhong University of Science and Technology, Wuhan 430074, China |
| |
| Abstract: | A fixed phase displacement exists when electronic instrument transformers sample analog signals,which affects the measurement accuray,and needs to be corrected using phase shift method.This paper proposes a digital phase-shift method based on least-square fitting algorithm.The digital phase shifting recurrence formula is deduced,and the performance of phase shifting algorithm is simulated and analyzed.The results show that the method has a relatively high resolution and precision in phase-shifting,furthermore,it can guarantee the amplitude measurement accuracy.The algorithm is applied to the Rogowski coil based electronic instrument transformers,and the feasibility and validity of the algorithm are verified by accuracy comparison test. |
| |
| Keywords: | electronic instrument transformer phase displacement digital phase-shift least-square fitting |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《》浏览原始摘要信息 |
|
点击此处可从《》下载全文 |
|
