Patent
Capacitive voltage-division type self-calibration optical voltage transducer
Guo Zhizhong,Zhang Guoqing,Yu Wenbin,Lu Zhongfeng,Shen Yan,Wang Guizhong,Li Shenwang +6 more
- 09 May 2012
14
TL;DR: In this article, a capacitive voltage-division type self-calibration optical voltage transducer is used for voltage measurement in an electric power system. But it is poor in interference rejection.
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Abstract: The invention discloses a capacitive voltage-division type self-calibration optical voltage transducer, which is used for solving the problem that the existing capacitive voltage-division type optical voltage transducer generates measurement accuracy temperature drift under the influence of temperature and is poor in interference rejection. The capacitive voltage-division type self-calibration optical voltage transducer comprises a capacitive voltage divider, a base and an optical voltage sensor, the capacitive voltage divider comprises a high-voltage capacitor, a low-voltage capacitor, a signal output terminal and a grounding terminal; the optical voltage sensor comprises an optical voltage sensing unit, and further comprises a signal processing unit; and the signal processing unit comprises a photoelectric conversion module, an anti-aliasing filter, a band-pass filter, an amplifier, an A/D (analogue/digital) conversion module, a DSP (Digital Signal Processor),a D/A conversion module, an amplifying module, an overvoltage protection module, an LED (Light-Emitting Diode) light source, a power conversion module, a combining unit and a direct current power module, and further comprises a photoelectric hybrid connector module. The capacitive voltage-division type self-calibration optical voltage transducer is used for voltage measurement in an electric power system.
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Citations
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Patent
Electronic voltage transformer using data fusion technology and error calibration method thereof
Yanping Wu,Wanglin Ding,Wenbing Lu +2 more
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TL;DR: In this article, an electronic voltage transformer using data fusion technology and an error calibration method thereof is presented, which includes the following steps of: acquiring a secondary measured voltage by using a capacitive voltage divider and a sampling resistor R, accessing the voltage to a data acquisition processor for sampling, and tracing the frequency of the voltage; accessing a signal of a temperature sensor to the data aggregation processor, and computing the temperatures of measuring points; dynamically computing a divided voltage ratio of the capacitive divider according to the temperature variation of the measuring points by using data acquisition device processing software
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Patent
Concentricity-autocompensation type coaxial capacitance partial pressure electronic voltage transformer and compensation method thereof
Dongbo Zhang,Ting Zhang +1 more
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TL;DR: In this article, a concentricity-autocompensation type coaxial capacitance partial pressure electronic voltage transformer is proposed for a casing pipe, which comprises a high-voltage electrode and a round measuring electrode formed by connecting three or more tile-shaped electrode pedals in a surrounding mode.
2
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Capacitive voltage division electronic voltage transformer
Yixiong Liu,Hongqing Wang,Fei Lin +2 more
- 20 Jul 2011
TL;DR: In this paper, the authors proposed an environment-friendly, safe and routine-maintenance-free CVDE voltage transformer, which is free of SF6 (sulfur hexafluoride) gas.
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