A Differential Self-Integration D-Dot Voltage Sensor and Experimental Research

Abstract

An electronic voltage transformer with self-integral D-dot sensor is proposed for measuring high-voltage signals based on the principle of the D-dot measurement. The D-dot sensor can realize the potential detection of the conductor in a noncontact way according to the principle of electric field coupling. The application of the parallel and differential structure of multiple electrodes can operate sensor work in self-integration mode and achieve a good phase-frequency characteristic while the volume is smaller. Ansoft Maxwell was used to model and simulate the D-dot sensor. The optimization of sensor structure design parameters are obtained through finite-element simulation. The sensor has been produced preliminarily to carry out an error and transient performance test under the 2-kV voltage level. The test results show that the new sensor can meet the exact measurement requirements and have good transient characteristics.Index Terms-D-dot sensor, non-contact measurement, differential, self-integration. 1530-437X

Modeling Of Structural And Environmental Effects On Microelectromechanical (Mems) Vibratory Gyroscopes

“…FEA based modeling are robust, flexible and accurate in solving the complete multi-physics problem. Additionally, it can be coupled with controllers and electronics for selecting an appropriate controller [8].…”

Design and Simulation Test of an Open D-Dot Voltage Sensor

“…Therefore, based on the traditional D-dot sensor, a differential input is adopted, the ground terminal is removed, and a multi-electrodes parallel structure is employed to increase the mutual capacitance. In this way, the D-dot sensor could maintain the self-integral pattern under small frequency [ 5 , 6 , 7 , 8 ].…”

“…The self-integral D-dot voltage sensor has a simpler structure, a smaller size and a higher measuring bandwidth [ 5 , 6 , 7 , 8 ]. However, it is inconvenient in practical installation due to the symmetric structure.…”

“…The traditional D-dot voltage sensor will adopt different operating modes under different frequencies [ 9 , 10 , 11 , 12 , 13 ]. To maintain the self-integral mode, a differential D-dot sensor is designed [ 5 , 6 , 7 , 8 ]. Its equivalent circuits are shown in Figure 1 .…”

“…More details about derivation of the transfer function are introduced in Reference [ 5 ]. R m of the differential amplifier is generally large, reaching tens or thousands of GΩ level.…”