Design, Development and Analysis of a Voltage Sensor Based on Capacitive Voltage Divider for Smart Grid Applications

2020 ◽  
Author(s):  
João Soares Farias Neto ◽  
Lucas Vinicius Hartmann ◽  
Camila Seibel Gehrke ◽  
Fabiano Salvadori
Keyword(s):  
Fundamental Frequency ◽  
Low Voltage ◽  
Data Communication ◽  
Voltage Divider ◽  
Power Measurement ◽  
Design Development ◽  
Capacitive Voltage ◽  
Phase Deviation ◽  
Capacitive Voltage Divider ◽  
Bidirectional Power Flow

With the recent push for renewable energy several former consumers units now have energy generation capabilities. While this approach is beneficial in general, it also poses new challenges for cooperation and grid stability. The new smartgrid now needs bidirectional power flow, data communication, and intelligent controls in order to ensure reliable operation. Voltage sensing plays a key role, capacitive voltage transformers have been demonstrated useful for high- voltage (100kV+), but have not yet been discussed for low (220V) and medium (13kV) voltage. This paper proposes a simplified capacitive voltage divider circuit for low-voltage measurement. Mathematical modelling is used for steady-state operation, circuit design, and sensitivity to analysis. Monte-Carlo simulations are employed to verify the effect of component tolerances, indicating under 0.7dB gain, and 0.03° error at fundamental frequency. Experimental validation is performed at low-voltage levels (127V), indicating 0.5 dB magnitude and 0.3° phase deviation at fundamental frequency. Performance is also validated from 60Hz to the 50th harmonic, showing 20° phase deviation at the higher order harmonics (16th and up). From the obtained results it is expected that the sensor is sufficient for voltage quality measurements, but should be software-corrected if power measurement is required at the high-order harmonics.

Design of a Two Levels Self-Integrating Capacitive Divider

2014 ◽  
Vol 599-601 ◽  
pp. 882-886
Author(s):  
Bao Feng Cao ◽  
Jiang Bing Fan ◽  
Li Jun Song ◽  
Xue Qin Zhang ◽  
Xin Li ◽  
...  
Keyword(s):  
High Voltage ◽  
Voltage Pulse ◽  
Low Voltage ◽  
Voltage Divider ◽  
High Voltage Pulse ◽  
Pulse Source ◽  
Voltage Level ◽  
Capacitive Divider ◽  
Capacitive Voltage ◽  
Capacitive Voltage Divider

A ims . A kind of two levels self-integrating capacitive voltage divider is designed to online measure high voltage nanosecond pulse. Methods. The circuit principle of capacitive divider is analyzed, and the theoretical voltage ratio is calculated. The calibration is carried out by using a low voltage pulse source. The divider with a primary voltage divide ratio 601 has been tested to frequency response exceed 1GHz. The second voltage divide ratio can be set flexibly using different ratio attenuators according to the different voltage level of the source. Result. Finally, this divider is used in measuring 600kV high voltage pulse source, and the experimental results show that the present coaxial capacitive divider is reliable and satisfactory for the measuring requirement in time domain and frequency domain.

scholarly journals A Development of a Capacitive Voltage Divider for High Voltage Measurement as Part of a Combined Current and Voltage Sensor

2020 ◽  
Vol 26 (4) ◽  
pp. 25-31
Author(s):  
Roman Hrbac ◽  
Vaclav Kolar ◽  
Mikolaj Bartlomiejczyk ◽  
Tomas Mlcak ◽  
Petr Orsag ◽  
...  
Keyword(s):  
Measurement Error ◽  
High Voltage ◽  
Smart Grids ◽  
Renewable Energy Sources ◽  
Voltage Divider ◽  
Power Measurement ◽  
Voltage Measurement ◽  
Power Networks ◽  
Capacitive Voltage ◽  
Capacitive Voltage Divider

This article deals with the development of capacitive voltage divider for high voltage measurements and presents a method of analysis and optimization of its parameters. This divider is a part of a combined voltage and current sensor for measurements in high voltage power networks. The sensor allows continuous monitoring of the network distribution status and performs a quick diagnosis and location of possible network failures. Deployment of these devices will support semi-autonomous control of power networks and it can be considered as a step from traditional power grids toward smart grids. This is a worldwide trend connected with increasing number of renewable energy sources and plug-in electric vehicles as described in. In this way, it contributes to the reliability of the distribution network. Together with automated control techniques and fault location methods, it enables its self-healing capability. The following characteristics required for the sensor include: current measurement error up to 2 %, voltage measurement error up to 0.5 %, and power measurement error up to 5 %. At the same time, it is necessary that the sensor is cost-effective - relatively cheap. There were selected capacitors made in series production for the capacitive divider designing. The capacitive voltage divider was tested in terms of time and temperature stability; the results are described in the paper. Then, the method of mathematical correction of a temperature dependence of the capacitive voltage divider was suggested and tested.

Design of capacitive voltage divider for measuring ultrafast voltages

2018 ◽  
Vol 99 ◽  
pp. 426-433 ◽  
Author(s):  
Uroš D. Kovačević ◽  
Koviljka Đ. Stanković ◽  
Nenad M. Kartalović ◽  
Boris B. Lončar
Keyword(s):  
Voltage Divider ◽  
Capacitive Voltage ◽  
Capacitive Voltage Divider

Current and voltage monitors on a pulsed-power accelerator “Gamma-1”

2014 ◽  
Vol 32 ◽  
pp. 1460328
Author(s):  
N. V. Zavyalov ◽  
V. S. Gordeev ◽  
A. V. Grishin ◽  
S. Yu. Puchagin ◽  
K. V. Strabykin ◽  
...  
Keyword(s):  
Voltage Divider ◽  
Pulsed Power ◽  
Program System ◽  
Voltage Sensors ◽  
Capacitive Voltage ◽  
Processing Information ◽  
Electric Parameters ◽  
Capacitive Voltage Divider ◽  
Rogowski Coils ◽  
Accelerator System

There is presented a system of registering electric parameters of high-current pulsed electron accelerator “Gamma-1” its output electric power being 1.5 TW. The accelerator system of registration makes it possible to register in a single time scale the voltage pulses with the amplitude up to 3 MV, current pulses with the amplitude up to 1 MA and duration from several nanoseconds to a microsecond. Into the system of registration there are included two-step resistive voltage dividers, capacitive voltage divider, Rogowski coils, sectionalized Rogowski coils, B-dots, shunts, transmission line, attenuators, oscilloscopes, program system. The program system is aimed at reading, transmitting and processing information from oscilloscopes on the archival computer and provides interaction with database of current and voltage sensors, cables and filters. For each registration session the system also forms a map of experiment where system configuration and experiment parameters are presented.

Application of the Hybrid Multiobjective Optimization Methods on the Capacitive Voltage Divider

2009 ◽  
Vol 45 (3) ◽  
pp. 1594-1597 ◽  
Author(s):  
P. Kitak ◽  
I. Ticar ◽  
J. Pihler ◽  
A. Glotic ◽  
J. Popovic ◽  
...  
Keyword(s):  
Multiobjective Optimization ◽  
Voltage Divider ◽  
Optimization Methods ◽  
Capacitive Voltage ◽  
Capacitive Voltage Divider
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