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Sensors 2016, 16(10), 1683;

Decomposition of Composite Electric Field in a Three-Phase D-Dot Voltage Transducer Measuring System

1,* , 2,†
State Key Laboratory of Power Transmission Equipment & System Security and New Technology, Chongqing University, Chongqing 400044, China
Maintenance Branch of State Grid Chongqing Electric Power Company, Chongqing 400039, China
These authors contributed equally to this work.
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M.N. Passaro
Received: 22 July 2016 / Revised: 20 September 2016 / Accepted: 28 September 2016 / Published: 12 October 2016
(This article belongs to the Section Physical Sensors)
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In line with the wider application of non-contact voltage transducers in the engineering field, transducers are required to have better performance for different measuring environments. In the present study, the D-dot voltage transducer is further improved based on previous research in order to meet the requirements for long-distance measurement of electric transmission lines. When measuring three-phase electric transmission lines, problems such as synchronous data collection and composite electric field need to be resolved. A decomposition method is proposed with respect to the superimposed electric field generated between neighboring phases. The charge simulation method is utilized to deduce the decomposition equation of the composite electric field and the validity of the proposed method is verified by simulation calculation software. With the deduced equation as the algorithm foundation, this paper improves hardware circuits, establishes a measuring system and constructs an experimental platform for examination. Under experimental conditions, a 10 kV electric transmission line was tested for steady-state errors, and the measuring results of the transducer and the high-voltage detection head were compared. Ansoft Maxwell Stimulation Software was adopted to obtain the electric field intensity in different positions under transmission lines; its values and the measuring values of the transducer were also compared. Experimental results show that the three-phase transducer is characterized by a relatively good synchronization for data measurement, measuring results with high precision, and an error ratio within a prescribed limit. Therefore, the proposed three-phase transducer can be broadly applied and popularized in the engineering field. View Full-Text
Keywords: three-phase D-dot voltage transducer; Ansoft Maxwell; decomposition of composite field three-phase D-dot voltage transducer; Ansoft Maxwell; decomposition of composite field

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Hu, X.; Wang, J.; Wei, G.; Deng, X. Decomposition of Composite Electric Field in a Three-Phase D-Dot Voltage Transducer Measuring System. Sensors 2016, 16, 1683.

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