Modeling of a Resistive Voltage Divider by Rational Functions: Uncertainty Evaluation

Souza, Leonardo Augusto Abreu De; Pinto, Marcus Vinicius Viegas; Martins, Marcelo Britto; Lima, Antonio C. S.

doi:10.1109/tim.2020.3047956

Cited by 5 publications

(3 citation statements)

References 10 publications

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“…Here, ω denotes radian frequency. In [11,12] this transfer function was modeled by rational functions in the power quality frequency range (50 Hz-3 kHz). In such a black-box approach, a vector fitting tool was applied to build an off-line, s-domain model of the RVD.…”

Section: Transfer Function Of Rvdmentioning

confidence: 99%

Digital Compensation of a Resistive Voltage Divider for Power Measurement

et al. 2021

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The paper presents a method for digital compensation of the ratio and phase angle errors of a resistive voltage divider. The system consists of a separate electrical circuit of a resistive divider, and a digital compensation system based on National Instruments (NI) PCI eXtension for Instrumentation (PXI) PXI-5922 digital acquisition cards (DAQ). A novel approach to the real-time compensation is presented, using digital signal processing. The algorithm is based on Wiener filtering and finite-impulse-response (FIR) filters. The proposed digital compensation, using FIR digital filtration and NI PXI DAQs, gives maximum magnitude error below 400 ppm and the phase angle error below 4500 μrad, in the frequency band 50 Hz–100 kHz. The algorithm allows the fine-tuning of the compensation to adjust to the possible change in the original transfer function due to the aging of the components.

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Section: Transfer Function Of Rvdmentioning

confidence: 99%

Digital Compensation of a Resistive Voltage Divider for Power Measurement

et al. 2021

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“…The final user will then be able to adopt the novel characterization method with the certainty that its results are metrologically valid. This last aspect is quite important for a metrologist, and the concept is described elsewhere in the literature [ 20 , 21 , 22 , 23 ].…”

Section: Introductionmentioning

confidence: 99%

Validation of a Simplified Method for Estimating the Harmonic Response of Rogowski Coils with the Monte Carlo Method

Betti,

Mingotti,

Tinarelli

et al. 2024

Sensors

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The need to monitor the power network is leading to a significant increase in the number of measurement points. These points consist of intelligent electronic devices and instrument transformers (or more in general sensors). However, as the number of devices increases, so does the demand for their characterization and testing. To this end, the authors formulated a new characterization procedure that offers numerous benefits for manufacturers and system operators. These benefits include: (i) reducing testing time (thus lowering costs), (ii) simplifying the existing procedures, and (iii) increasing the number of tested devices. In this study, to complete the validation of the proposed characterization procedure, the authors performed a comprehensive uncertainty evaluation. This included the identification and analysis of the uncertainty sources, the implementation of the Monte Carlo method to obtain the statistical parameters of the quantities of interest, and the final method assessment according to the obtained results. Each step is described in detail, and the results allow one to (i) replicate the uncertainty analysis on other types of instrument transformers and (ii) implement the proposed harmonic characterization procedure with the confidence that the method is accurate, flexible, and scalable.

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“…The resistive divider is the most accurate device for measuring UHVDC voltage [7]. The resistive divider is widely applied in voltage measurements of 100 kV and higher [8][9][10].…”

Section: Introductionmentioning

confidence: 99%

Optimization of DC Resistance Divider Up to 1200 kV Using Thermal and Electric Field Analysis

Li,

Du,

Zhu

et al. 2023

Energy Engineering

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Self-heating and electric field distribution are the primary factors affecting the accuracy of the Ultra High Voltage Direct Current (UHVDC) resistive divider. Reducing the internal temperature rise of the voltage divider caused by self-heating, reducing the maximum electric field strength of the voltage divider, and uniform electric field distribution can effectively improve the UHVDC resistive divider's accuracy. In this paper, thermal analysis and electric field distribution optimization design of 1200 kV UHVDC resistive divider are carried out: (1) Using the proposed iterative algorithm, the heat dissipation and temperature distribution of the high voltage DC resistive divider are studied, and the influence of the ambient temperature and the power of the divider on the temperature of the insulating medium of the divider is analyzed; (2) Established the finite element models of 1200 kV and 2 × 600 kV DC resistive dividers, analyzed the influence of the size of the grading ring and the installation position on the maximum electric field strength of the voltage divider, and calculated the impact of the shielding resistor layer on the vicinity of the measuring resistor layer. The research indicates that: (1) The temperature of the insulating medium is linearly related to the horsepower of the voltage divider and the ambient temperature; (2) After the optimized design of the electric field, the maximum electric field strength of the 1200 kV DC resistive divider is reduced to 1471 V/mm, which is about 24% lower than that of the unoptimized design; (3) Installing the shielding resistor layer can significantly improve the electric field near the measuring resistor layer. This paper has an important reference function for improving the accuracy of the UHVDC resistive divider.

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Modeling of a Resistive Voltage Divider by Rational Functions: Uncertainty Evaluation

Cited by 5 publications

References 10 publications

Digital Compensation of a Resistive Voltage Divider for Power Measurement

Digital Compensation of a Resistive Voltage Divider for Power Measurement

Validation of a Simplified Method for Estimating the Harmonic Response of Rogowski Coils with the Monte Carlo Method

Optimization of DC Resistance Divider Up to 1200 kV Using Thermal and Electric Field Analysis

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