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781 articles for “voltage (V)”
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Self-tuning Adaptive Control of Rotor Voltage of Doubly Fed Induction Generator in Wind Farms
Abstract: The dynamic performance of a doubly fed induction generator (DFIG) in the wind farms can be enhanced through appropriate converter controls. This article presents a self-tuning control strategy for a DFIG rotor voltage which employs pole-shift technique in the discrete system model. From a large number of simulation studies involving various types of disturbances covering a range of operating conditions, it was observed that the online adaptive model based control …
Published in Journal of Control & Instrumentation · Vol. 8, Issue 1, 2017 · pp. 17–29 Read article
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Automatic Evaluation of the Thin-film Multijunction TVC Performance in the Highly Accurate AC Voltage Measurements
Abstract: In this paper, The Thin-Film Multijunction Thermal Converter (TFMJTC) is evaluated by comparing its performance with the Single Junction Thermal Converter (SJTC) performance. This comparison is performed automatically by making new LabVIEW programs which are developed especially for this purpose. The performance of the TFMJTC is determined with the help of characteristic tests which are important to each thermal converter (TC) to be determined to put them into consideration during …
Published in Journal of Control & Instrumentation · Vol. 4, Issue 1, 2013 · pp. 1–10 Read article
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Design and Verification of Low Power High Speed Voltage Level Shifter Based on Pass Transistor Methodology
Abstract: This study explains how a voltage level shifter (LS) can be built using a Wilson current mirror level shifter (WCMLS) with a mirrored output. The proposed fix avoids WCMLS's typical issue of requiring a mirror with a size ratio that is too large. It's a space- and cost-saver. The proposed LS requires less components than its modern versions and uses only tiny components, taking up even less space. The proposed …
Published in Journal of Control & Instrumentation · Vol. 14, Issue 2, 2023 · pp. 30–37 Read article
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Breakdown Characteristics of Solid Insulating Materials for High Voltage Applications
Abstract: Electrical power systems are experiencing significant changes worldwide both in size and in complexities. Rapid growth of the power sector in the nation provides the opportunity to power engineer to design the power equipment which can with stand the high voltage and also provide reliability during their operating life. As the generating capacity of power plants have increased in recent time, application of high voltage has also intensively increased due …
Published in Journal of Electronic Design Technology · Vol. 6, Issue 3, 2015 · pp. 17–24 Read article
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Design Simulation of Improvement of Voltage Profile and Loss Minimization by Efficient Placement of Distributed Generation in Grid Connected System
Abstract: Electricity consumption is rapidly increasing, and the gap between generation and load is widening. The mismatch between demand and load causes a range of problems, including failure, low power, and, in certain cases, blackout. These issues will be solved by including Distributed Generation (DG) into the system. For maximum dependability, technological and economic benefits, and optimal size and capabilities of distributed generators, the proper distribution of power systems, kind of …
Published in Journal of Electronic Design Technology · Vol. 12, Issue 2, 2021 · pp. 1–9 Read article
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Improvement of Power Quality & Voltage Profile Through the Optimal Placement of Artificial Intelligence based UPFC Controller
Abstract: Amidst the array of FACTS controllers, the Unified Power Flow Controller (UPFC) stands out as a distinguished member, renowned for its array of beneficial features. Recognized as among the most advanced FACTS devices, the UPFC excels in facilitating simultaneous control overactive and reactive power flow as well as voltage magnitude. FACTS devices are instrumental in managing power flow, enhancing transmission capacity, and optimizing power system stability. Increasing the capacity of …
Published in Journal of Instrumentation Technology & Innovations · Vol. 13, Issue 3, 2023 · pp. 18–26 Read article
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The Frequency and Transient Analyses of a High Voltage Bushing/Transformer Cascade
Abstract: This paper investigates the frequency characteristics and electromagnetic transients of a typical system composed of a high voltage bushing and a power transformer connected in cascade. Detailed distributed-parameter Laplace-domain models are adopted for the digital simulations. These parameters include, among others, the transformer winding’s series inductance, its capacitance to ground and the inter-turn capacitances. Moreover, the number, the geometrical data of the capacitively-graded bushing’s conducting foils and the dielectric insulating …
Published in Journal of Power Electronics and Power Systems · Vol. 9, Issue 1, 2019 · pp. 42–53 Read article
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Improvement of Voltage Profile and Loss Reduction using Optimized Soft Computing Based Capacitor Placement Methodology
Abstract: Significant exploration has been done on the arrangement of ideal capacitor arranging in the appropriation frameworks for the assignments of power factor adjustment, voltage profile improvement and misfortune decrease. Particularly, mechanical plant with variable load conditions has huge inductive loads and its power factor is exceptionally poor. These ventures advantage most capacitor banks. This bank gives improved power factor, expanded voltage level on the load and lessen the electric service …
Published in Journal of Power Electronics and Power Systems · Vol. 10, Issue 2, 2020 · pp. 11–21 Read article
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A Study of a Non-Isolated DC-DC Converter Based on High Voltage Gain
Abstract: This article implements a best non-isolated DC-DCConverter for solar photovoltaic system-driven DC MicroGridapplications through high voltage gain methodology. At first, ahybrid boosting converter with bipolar voltage multiplier method isproposed and studied for photovoltaic-based DC MicroGrids. Butthe cost and functionality of this converter are a big problem. Toeradicate these problems with a proposed modified SEPICconverter and this converter is studied for producing high voltagegain. Formerly performance of hybrid boosting converter andmodified …
Published in Journal of Power Electronics and Power Systems · Vol. 13, Issue 3, 2023 · pp. 17–29 Read article
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Simulation of Threshold Voltage Variation of Enhancement Mode n-channel MOSFET
Abstract: AbstractThe paper focuses on simulation of variation of threshold voltage as a function of effective channel length of the short-channel MOSFETs with a Gaussian-like doping profile. An investigation of short channel effect (SCE) in deep submicron region has been carried out. The validity of the proposed simulation is shown by comparing the results with the numerical calculation and simulation of data obtained by using the commercially available simulation software. Finally, …
Published in Journal of Semiconductor Devices and Circuits · Vol. 4, Issue 2, 2017 · pp. 34–40 Read article
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Low-Offset High Speed CMOS Voltage Comparator using 180 nm Technology
Abstract: A low Off-Set high-speed two-stage dynamic comparator is presented in this paper. In this circuit, PMOS transistors are used at the input of the first and second stages of the comparator. At the evaluation phase, the second stage is activated after the first stage with a predetermined delay to achieve a controllable pre-amplifier gain. Also, the first stage is turned off after the delay to reduce overall power consumption. Simulation …
Published in Journal of VLSI Design Tools and Technology · Vol. 7, Issue 2, 2017 · pp. 21–27 Read article
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Design and Simulation of Improvement of Voltage Profile by Efficient Placement of Distributed Generation in Micro Grid
Abstract: The headway of Decentralized Generators or Distributed Generation (DG) acquaints new changes with the since a long time ago settled power framework. Dissemination Generation plays a prime capacity in conveyance framework by updating the frameworks unwavering quality, abridgement in power misfortunes and elevating the voltage profile. This paper proposes a scientific way to deal with catch the ideal size and ideal portion of DG substances in reconfigured appropriation system to …
Published in Trends in Electrical Engineering · Vol. 10, Issue 2, 2020 · pp. 1–8 Read article
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On The Energization and Steady-State Performance of 6-Pulse Diode Bridge Rectifiers Supplying Constant Voltage Loads
Abstract: The paper addresses the analysis of 3-phase 6-pule diode bridge rectifier circuits supplying a special load category representable by constant voltage sources. The applied Mathematica-based solution technique can handle symmetrical and unsymmetrical 3-phase voltages. The presented results include the phase currents on the AC side as well as the magnitude and wave shape of the output current on the DC side. Several case studies demonstrating the impact of the source’s …
Published in Trends in Electrical Engineering · Vol. 11, Issue 1, 2021 · pp. 14–23 Read article
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Novel Laplace-domain Approach to the Electromagnetic Transients in Compensated High Voltage Power Lines
Abstract: This paper addresses the simulation of the electromagnetic transients developed in high voltage power lines, which are initiated by lightning discharges. The analysis can handle both individual and simultaneous series inductive and shunt capacitive compensation types. The sizes and locations of the compensating elements are included in the analysis. The derived Laplace s-domain mathematical model applies the concept of the ABCD transmission constants representing equivalent two-port networks. Applying the relations …
Published in International Journal of Electrical Machine Analysis and Design · Vol. 2, Issue 1, 2024 · pp. 15–21 Read article
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Studies on the DC Characteristics of Nanoelectronic Single-Heterojunction GaN based HEMTs with AlGaN Layer of 22 nm
Abstract: AbstractIn this work, total 2367 individual simulation-outputs are reported. We have studied the drain characteristics in AlGaN/GaN high electron mobility transistors (HEMTs) having the AlGaN thickness of 22 nm. According to this study, the drain current increases with drain voltage. Also, the drain current increases with gate voltage. The drain current is observed as higher at larger aluminium mole fraction. Also, the drain current is higher at larger doping concentration. …
Published in Journal of Microwave Engineering and Technologies · Vol. 5, Issue 1, 2018 · pp. 1–12 Read article
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Studies on the Variations of Drain Current in Gallium Nitride based High Electron Mobility Transistors
Abstract: AbstractIn this work, total 2477 individual simulation outputs are reported. Variations in drain current with respect to the electrical parameters (drain voltage and gate voltage) and structural parameters of high electron mobility transistors (HEMTs) have been studied. The drain current is higher corresponding to larger aluminium mole fraction. This study will be useful to fabricate the HEMT based biomedical sensors.Keywords: Drain current, drain voltage, gate voltage, high electron mobility transistorCite …
Published in Journal of Microwave Engineering and Technologies · Vol. 5, Issue 1, 2018 · pp. 13–24 Read article
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Solution of Different Problems Related to Active Power Filter Design Using Python
Abstract: ABSTRACTThere are a variety of problems that lead to problems of rising losses and degradation in power quality in AC due to harmonic distortions, voltage sag, voltage spike, flicker, voltage swell, voltage fluctuations, noise and voltage imbalance. In this paper, different problems are analysed and based on their circuit type, input and output value of voltage and current VSI circuit is designed to increase performance in the system. In AC …
Published in Journal of Microelectronics and Solid State Devices · Vol. 9, Issue 3, 2022 · pp. 1–8 Read article
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On The Time-Domain Analysis of the Electromagnetic Transients in High-Voltage Line Towers
Abstract: This paper presents an efficient and direct method for the time-domain transient analysis of high voltage power line towers. A Mathematica-based numerical solution of the governing set of simultaneous partial differential and algebraic equations is proposed. The results of a corresponding computer code are presented and discussed. A comparison with other more sophisticated analytical time-and Laplace-domain approaches is presented. In addition to the possible use of the EMTP transients’ program, …
Published in Journal of Nuclear Engineering & Technology · Vol. 13, Issue 2, 2023 · pp. 12–20 Read article
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Optimal Placement and Location of Phasor Measurement Unit Considering Bus Voltage Using Genetic Algorithm
Abstract: This paper presents a procedure by which new PMU locations can be symmetrically determined in order to render an observable system. Monitoring and supervision of power systems are provided by the control centre, whose role is the design, coordination and network management. In this paper, an attempt has been made to control technique based on the implantation of measurement units at the network buses. A proposed methodology makes the system …
Published in Journal of Power Electronics and Power Systems · Vol. 6, Issue 2, 2016 · pp. 74–84 Read article
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Circuit Breakers’ Recovery Voltage Transients: Impact of Composite Loads and Power Network’s Configuration
Abstract: The paper addresses the identification of the circuit breaker transient recovery voltage and its dependence on the loading conditions and the data of the power network, such as its rated power frequency and short-circuit level. A Laplace-domain approach is adopted and a closed-form expression for the recovery voltage is derived. A numerical inversion technique using Mathematica is implemented in order to get its time waveform. The proposed technique is applied …
Published in Journal of Power Electronics and Power Systems · Vol. 11, Issue 2, 2021 · pp. 18–26 Read article