A Cost-effective Method for Resolution Increase of the Twostage Piecewise Linear ADC Used for Sensor Linearization

Jovanović, Jelena; Denić, Dragan

doi:10.1515/msr-2016-0005

Cited by 7 publications

(15 citation statements)

References 6 publications

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“…The linearization of the objective function can reduce the computational complexity and improve the efficiency of the solution. Equation ( 17) can be rewritten as Equation ( 27) at the first step, and then v 2 b,t and v b,t are transformed into Equation (28) by using the conventional piecewise linearization method [24]:…”

Section: The Solution Strategy Of the Proposed Modelmentioning

confidence: 99%

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Active and Reactive Power Collaborative Optimization for Active Distribution Networks Considering Bi-Directional V2G Behavior

Zhang

Yang

et al. 2021

Sustainability

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Due to their great potential for energy conservation and emission reduction, electric vehicles (EVs) have attracted the attention of governments around the world and become more popular. However, the high penetration rate of EVs has brought great challenges to the operation of the Active Distribution Network (ADN). On the other hand, EVs will be equipped with more intelligent chargers in the future, which supports the EVs’ high flexibility in both active and reactive power control. In this paper, a distributed optimization model of ADN is proposed by employing the collaborative active and reactive power control capability of EVs. Firstly, the preference of EV users is taken into account and the charging mode of EVs is divided into three categories: rated power charging, non-discharging, and flexible charging–discharging. Then, the reactive power compensation capacity of the plugged-in EV is deduced based on the circuit topology of the intelligent charger and the active–reactive power control model of the EV is established subsequently. Secondly, considering the operation constraints of ADN and the charging–discharging constraints of EVs over the operation planning horizon, the optimization objective of the model is proposed, which consists of two parts: “minimizing energy cost” and “improving voltage profile”. Finally, a distributed solution method is proposed based on the Alternating Direction Method of Multipliers (ADMM). The proposed model is implemented on a 33-bus ADN. The obtained results demonstrate that it is beneficial to achieve lower energy cost and increase the voltage profile of the ADN. In addition, the energy demand of EV batteries in their plugin intervals is met, and the demand preference of EV users is guaranteed.

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Section: The Solution Strategy Of the Proposed Modelmentioning

confidence: 99%

“…where P v j,t and P vm j,t are the actual active power and predicted active power of PV at timeslot t. Similarly, the output of wind turbines (WT) can be expressed as follows: P w j,t = P wm j,t , ∀j ∈ V n (24) where P w j,t and P wm j,t are the actual active power and predicted active power of WT at timeslot t.…”

mentioning

confidence: 99%

Active and Reactive Power Collaborative Optimization for Active Distribution Networks Considering Bi-Directional V2G Behavior

Zhang

Yang

et al. 2021

Sustainability

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“…The TSPLADC is a generalpurpose linearization circuit, i.e. by reprogramming its transfer function any sensor type can be linearized [8]- [15]. Fig.1.…”

Section: Proposed Linearization Circuitmentioning

confidence: 99%

“…Different solutions of the TSPLADC used for sensor linearization have been proposed during time, and among them are some that are considered as energy efficient [14], [15].…”

Section: Digital Signal Comparisonmentioning

confidence: 99%

An Improved Linearization Circuit Used for Optical Rotary Encoders

Jovanović

Denić

Jovanović

2017

Measurement Science Review

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Optical rotary encoders generate nonlinear sine and cosine signals in response to a change of angular position that is being measured. Due to the nonlinear shape of encoder output signals, encoder sensitivity to very small changes of angular position is low, causing a poor measurement accuracy level. To improve the optical encoder sensitivity and to increase its accuracy, an improved linearization circuit based on pseudo-linear signal generation and its further linearization with the two-stage piecewise linear analog-to-digital converter is presented in this paper. The proposed linearization circuit is composed of a mixed-signal circuit, which generates analog pseudo-linear signal and determines the first four bits of the final digital result, and the two-stage piecewise linear analog-to-digital converter, which performs simultaneous linearization and digitalization of the pseudo-linear signal. As a result, the maximal value of the absolute measurement error equals to 3.77168·10 -5 [rad] (0.00216°) over the full measurement range of 2π [rad].

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“…The hardware implementation of the piece-wise method is also considered here, as well as in the papers. 16,17 Of the software methods piece-wise, polynomial, ANN, and fuzzy methods are highlighted.…”

Section: Introductionmentioning

confidence: 99%

Two-stage segment linearization as part of the thermocouple measurement chain

Živanović

Simić

2021

Measurement and Control

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An implementation of a two-stage piece-wise linearization method for reduction of the thermocouple approximation error is presented in the paper. First, the whole thermocouple measurement chain of a transducer is described, and possible error is analysed to define the required level of accuracy for linearization of the transfer characteristics. Evaluation of linearization functions and analysis of approximation errors are performed by the virtual instrumentation software package LabVIEW. The method is appropriate for thermocouples and other sensors where nonlinearity varies a lot over the range of input values. The basic principle of this method is to first transform the abscissa of the transfer function by a linear segment look-up table in such a way that significantly nonlinear parts of the input range are expanded before a standard piece-wise linearization. In this way, applying equal-segment linearization two times has a similar effect to non-equal-segment linearization. For a given examples of the thermocouple transfer functions, the suggested method provides significantly better reduction of the approximation error, than the standard segment linearization, with equal memory consumption for look-up tables. The simple software implementation of this two-stage linearization method allows it to be applied in low calculation power microcontroller measurement transducers, as a replacement of the standard piece-wise linear approximation method.

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A Cost-effective Method for Resolution Increase of the Twostage Piecewise Linear ADC Used for Sensor Linearization

Cited by 7 publications

References 6 publications

Active and Reactive Power Collaborative Optimization for Active Distribution Networks Considering Bi-Directional V2G Behavior

Active and Reactive Power Collaborative Optimization for Active Distribution Networks Considering Bi-Directional V2G Behavior

An Improved Linearization Circuit Used for Optical Rotary Encoders

Two-stage segment linearization as part of the thermocouple measurement chain

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