Phase Delay Detection Method for Optical Voltage Transformer Based on Newton Ring Grating

Nan XIE; Qifeng XU; Qiao TAN

doi:10.7500/AEPS20190508005

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Phase Delay Detection Method for Optical Voltage Transformer Based on Newton Ring Grating

Application Research | 更新时间：2025-06-16

- Phase Delay Detection Method for Optical Voltage Transformer Based on Newton Ring Grating
- Automation of Electric Power Systems Vol. 44, Issue 8, Pages: 185-191(2020)
- 作者机构：
  
  1.福州大学电气工程与自动化学院，福建省福州市 350108
  2.闽江学院计算机与控制工程学院，福建省福州市 350108
- 作者简介：
- 基金信息：
  
  National Natural Science Foundation of China
- DOI：10.7500/AEPS20190508005
  CLC：
- Received：08 May 2019，
  
  Revised：2019-07-18，
  
  Published Online：12 March 2020，
  
  Published：25 April 2020
- 稿件说明：
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谢楠,徐启峰,谭巧.采用牛顿环光栅的光学电压互感器相位延迟检测方法[J].电力系统自动化,2020,44(8):185-191.

XIE Nan,XU Qifeng,TAN Qiao.Phase Delay Detection Method for Optical Voltage Transformer Based on Newton Ring Grating[J].Automation of Electric Power Systems,2020,44(8):185-191.
谢楠,徐启峰,谭巧.采用牛顿环光栅的光学电压互感器相位延迟检测方法[J].电力系统自动化,2020,44(8):185-191. DOI： 10.7500/AEPS20190508005.

XIE Nan,XU Qifeng,TAN Qiao.Phase Delay Detection Method for Optical Voltage Transformer Based on Newton Ring Grating[J].Automation of Electric Power Systems,2020,44(8):185-191. DOI： 10.7500/AEPS20190508005.

摘要

基于非线性解调模式的光学电压互感器存在测量结果与光功率相关、电压测量范围受半波电压限制等问题。文中提出一种基于牛顿环亚波长光栅实现的线性光学电压互感器。与径向检偏光栅相比，牛顿环光栅的消光比沿径向均匀分布，可将电光相位延迟转换为光斑图像的同步旋转。四象限探测器用于对光斑图像进行定位，实现电压信号的实时线性测量。实验结果表明：该光学电压互感器的测量结果与光功率无关，对电光相位延迟的测量范围可以达到±80°，在实验室条件下准确级为0.2级。

Abstract

The measurement results of the optical voltage transducer based on the nonlinear demodulation mode are related to the optical power

and the half-wave voltage limits its voltage measurement range. To solve the above problems

this paper proposes a linear optical voltage transformer based on Newton ring sub-wavelength grating. Compared with the radial analyzer grating

the extinction ratio of the Newton ring grating is evenly distributed in the radial direction. It converts the electro-optic phase delay into the synchronous rotation of the spot image. The four-quadrant detector is used to locate the spot image for real-time linear measurement of the voltage signal. The experimental results show that the measurement result of the optical voltage transformer is independent on the optical power

and the measurement range of the electro-optic phase delay can reach ±80°

and the accuracy level is 0.2 in laboratory conditions.

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references

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