Patent
Capacitive voltage divider and intermediate voltage measurement method applied to electrified calibration
Xu Zhanhe,Zhang Luhua,Chen Changlong,Wang Liming,Yi Zhonglin,Ding Hengchun,Zhao Lin,Yuan Ruiming,Zhong Kan +8 more
- 16 Apr 2014
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TL;DR: In this article, a capacitive voltage divider is proposed to reduce the influence of external interference on an intermediate voltage value of the divider and to improve the measurement precision and stability.
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Abstract: The invention belongs to the technical field of capacitive voltage dividers and discloses a capacitive voltage divider and an intermediate voltage measurement method applied to electrified calibration. The capacitive voltage divider comprises a high voltage arm capacitor C1, a low voltage capacitor C2, a low voltage capacitor lead, a high voltage side shielding sleeve and a low voltage side shielding sleeve. Shielding is introduced in the capacitive voltage divider, the influence of external interference on an intermediate voltage value of the capacitive voltage divider can be effectively reduced, and measurement precision and stability are improved. The intermediate voltage measurement method comprises the steps of first utilizing a temperature sensor to obtain a temperature error, then correcting intermediate voltage obtained by the capacitive voltage divider through practical measurement according to the temperature error, and obtaining an intermediate voltage true value. The method reduces influence of temperature and improves stability of the intrinsic standoff ratio.
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Citations
Patent
Capacitive-type voltage transformer testing method
Liu Yi,Zhou Guyue,Liao Shuang,Lin Fuchang,Siwei Liu +4 more
- 27 Jan 2016
TL;DR: In this article, a capacitive-type voltage transformer testing method was proposed, which employs a CVT structure and wave transmission characteristics, carries out voltage increase testing through a central node between the CVT capacitive unit and an electromagnetic unit, records the voltage of the central node, a CVTs output voltage, and the current of an injection node, calculates and obtains transmission characteristics.
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Piccardo Francesco,Piuma Marino +1 more
- 09 Dec 2015
TL;DR: In this article, an adjusting tool system (3) is connected to the secondary unit (2) for adjusting a dividing ratio of the voltage divider, where a circuit configuration that results in a sufficiently accurate dividing ratio is selected.
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Long Zhaozhi,Lu Fei,Li Wenting,Liu Shaobo,Xiao Kai,Zong Xianwei,Geng Zhihui +6 more
- 12 Oct 2016
TL;DR: In this paper, an annular capacitive voltage divider for the linearity calibration of an impact voltage dividers was provided, which consisted of a conductive shell, a guide rod, a low-voltage arm and a data acquisition device.
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Deng Zhanfeng,Chen Shuo,Niu Xiaochen,Liu Zhanyuan,Hou Jibiao,Zheng Tianxiang,Li Lu,Sun Haijiang,Li Chuncheng +8 more
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TL;DR: In this paper, the authors proposed a live verification method of a current transformer, which comprises a step of shielding the magnetic field generated by the current which goes through a primary side conductor in the current transformer to be detected.
References
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
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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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Patent
Portable CVT error measurement method and device
Penghe Zhang,Guanjun Qian +1 more
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TL;DR: In this paper, an error testing method for a portable CVT (a capacitor voltage transformer) and a device thereof was proposed. But this method is not suitable for the measurement of high and low voltage side excitation resistance.
11
Patent
High voltage capacitance divider
He Qin,Ye Guoxiong,Yu Chunyu +2 more
- 17 Sep 2003
TL;DR: In this article, a high voltage arm capacitance divider is composed of the capacitance which is coaxially formed by a double-layer metallic film, and the distributed capacitance arranged between the high voltage electrode and the low voltage electrode is provided with shielding or casing protection.
11
Patent
Fully shielding capacitance voltage mutual inductor
Zengwen Wang,Weibai Wu,Lu Youmeng,Xiaoyan Li,Wangxian Tang +4 more
- 06 Aug 2008
TL;DR: In this article, a fully shielded capacitor voltage transformer is presented, which comprises a capacitor divider part and an electromagnetic device arranged in a sealed shell filled with insulating medium, under the impact of the voltage, the electric field force generated among the three is evenly distributed on the circumference and counterbalanced.
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Patent
Electronic type voltage transformer
Chen Fang,Chen Yongshan,Chen Xiufeng +2 more
- 03 Jul 2013
TL;DR: In this article, the authors describe an electronic type voltage transformer, which is characterized in that a voltage divider formed by connecting a high voltage arm, a signal electrode, and a low voltage arm in sequence is fixed in an inner cavity of a core insulator and is located above the axle wire of the core wire.
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