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Journal articles on the topic 'CURRENT CONTROL SCHEMES'

Author: Grafiati

Published: 11 September 2023

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1

Limongi, L., R. Bojoi, G. Griva, and A. Tenconi. "Digital current-control schemes." IEEE Industrial Electronics Magazine 3, no. 1 (2009): 20–31. http://dx.doi.org/10.1109/mie.2009.931894.

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2

Fujita, Hideaki, Hiroshi Yamashita, and Hirofumi Akagi. "Control and Performance of Digital Current-Control Schemes." Journal of the Japan Institute of Power Electronics 29, no. 1 (2003): 93–100. http://dx.doi.org/10.5416/jipe2003.29.1_93.

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3

Yuan, Jie, Dingdou Wen, and Yang Zhang. "Model Predictive Current Control Strategy with Reduced Computation Burden." Mathematical Problems in Engineering 2021 (February 4, 2021): 1–10. http://dx.doi.org/10.1155/2021/6677543.

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In this paper, three model predictive current control (MPCC) schemes for permanent magnet synchronous motors (PMSM) are studied. The first control scheme is the traditional optimal duty cycle model predictive current control (ODC-MPCC). In this scheme, according to the principle of minimizing the cost function, the optimal voltage vector is selected from the six basic voltage vectors which are optimized simultaneously with the duty, and then, the optimal voltage vector and its duty are applied to the inverter. In order to reduce the computational burden of ODC-MPCC, a second control scheme is

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4

Azab, Mohamed. "Comparative Study of BLDC Motor Drives with Different Approaches: FCS-Model Predictive Control and Hysteresis Current Control." World Electric Vehicle Journal 13, no. 7 (2022): 112. http://dx.doi.org/10.3390/wevj13070112.

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The control techniques of the brushless DC (BLDC) motor have gained a large amount of interest in recent years, with their use being implemented in order to achieve a high-performance drive, including quick transient response and high-quality waveforms at the steady state. This paper provides a comparative study between three control schemes of BLDC motors: the direct power control scheme using a finite control set model predictive control (FCS-MPC) approach, the stator current controlled scheme using an FCS-MPC approach, and the stator current controlled scheme using ON–OFF hysteresis current

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Abubakar, Muhammad, Herwig Renner, and Robert Schürhuber. "Development of A Novel Control Scheme for Grid-Following Converter under Asymmetrical Faults." Energies 16, no. 3 (2023): 1276. http://dx.doi.org/10.3390/en16031276.

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With the increasing penetration of converter-based power sources into the power system, the performance of the converter has become a key factor for enhancing grid reliability, especially during asymmetrical faults. To meet the low voltage ride-through requirements, the converter should feed the reactive power to the grid for voltage support while ensuring the maximum current limitation for the converter’s safety. For such injections, the grid codes are defined. This paper presents a novel and simplified reference current generation scheme to fulfill the requirement of recent grid codes, ensur

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Hawkins, Nicholas, Bhagyashri Bhagwat, and Michael L. McIntyre. "Nonlinear Current-Mode Control of SCIG Wind Turbines." Energies 14, no. 1 (2020): 55. http://dx.doi.org/10.3390/en14010055.

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In this paper, a nonlinear controller is proposed to manage the rotational speed of a full-variable Squirrel Cage Induction Generator wind turbine. This control scheme improves upon tractional vector controllers by removing the need for a rotor flux observer. Additionally, the proposed controller manages the performance through turbulent wind conditions by accounting for unmeasurable wind torque dynamics. This model-based approach utilizes a current-based control in place of traditional voltage-mode control and is validated using a Lyapunov-based stability analysis. The proposed scheme is comp

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Javed, Khalid, Ruben De Croo, Lieven Vandevelde, and Frederik De Belie. "Circulating Current Control in Interleaved and Parallel Connected Power Converters." Machines 11, no. 9 (2023): 878. http://dx.doi.org/10.3390/machines11090878.

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This article analyzes circulating current control in single-phase power electronic converters, focusing on two different topologies: interleaved and parallel configurations. The study involves a bridgeless interleaving topology with two boost converters for increased efficiency. A parallel connection is also examined for monitoring line current, circulating currents, and power factor control. The article widely explains all current loops, including Common Mode Circulating Currents (CMCC) in the bridgeless interleaved topology and Differential Mode Circulating Currents (DMCC) in parallel-connec

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Grcar, Bojan, Gorazd Stumberger, Anton Hofer, and Peter Cafuta. "IM Torque Control Schemes Based on Stator Current Vector." IEEE Transactions on Industrial Electronics 61, no. 1 (2014): 126–38. http://dx.doi.org/10.1109/tie.2013.2247016.

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9

Moin, Parviz, and Thomas Bewley. "Feedback Control of Turbulence." Applied Mechanics Reviews 47, no. 6S (1994): S3—S13. http://dx.doi.org/10.1115/1.3124438.

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A brief review of current approaches to active feedback control of the fluctuations arising in turbulent flows is presented, emphasizing the mathematical techniques involved. Active feedback control schemes are categorized and compared by examining the extent to which they are based on the governing flow equations. These schemes are broken down into the following categories: adaptive schemes, schemes based on heuristic physical arguments, schemes based on a dynamical systems approach, and schemes based on optimal control theory applied directly to the Navier-Stokes equations. Recent advances i

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10

Peng, Jingyao, and Ming Yao. "Overview of Predictive Control Technology for Permanent Magnet Synchronous Motor Systems." Applied Sciences 13, no. 10 (2023): 6255. http://dx.doi.org/10.3390/app13106255.

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Permanent magnet synchronous motors (PMSMs) are commonly used in the automation industry. With the speedy development of digital system processors, predictive control as a modern control scheme has been applied to improve the dynamic performance and work efficiency of PMSMs. This paper provides an overview of the research status of PMSM-based predictive control strategies. The deficiencies of the three most popular predictive schemes, deadbeat predictive control, finite-control-set model predictive control, and continuous-control-set model predictive control, and existing improvement strategie

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11

Kasai, Kazuhiko, and Yoji Ooki. "Current Status of Japanese Passive Control Technology Using Various Damping Materials." Key Engineering Materials 319 (September 2006): 197–208. http://dx.doi.org/10.4028/www.scientific.net/kem.319.197.

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Due to the recent earthquakes in the U.S. and Japan, many modern buildings ceased functioning and required costly structural and nonstructural repairs, although they successfully protected the lives of the occupants. Because of these, most major buildings constructed after the earthquakes utilize either passive-control scheme or base-isolation scheme in order to better protect the building and its contents. This paper addresses current status of passive control technology being implemented in Japan. Four major groups of dampers and their basic mechanisms are discussed. Three groups of frames a

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12

Li, Guang Lei, Shu Min Sun, Yan Cheng, Hong Bo Li, and Shuai Yuan. "Research on Optimization Control Strategy for Limiting Short-Circuit Current Based on Fuzzy Quantitative Control." Applied Mechanics and Materials 214 (November 2012): 527–30. http://dx.doi.org/10.4028/www.scientific.net/amm.214.527.

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To decrease short-circuit current, adjusting the power network operation by breaking transmission lines is the most economic and convenient measure. For large power grid, breaking transmission lines has thousands of combinations, so it's very difficult to find the best combination in a short time. Firstly, this paper formulated the sensitivity relationship between transmission line outage and impedance change. Then preliminary combinations schemes of transmission line outage were selected according to the sensitivity. Index values of factors were given using the fuzzy control evaluation. Final

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13

Hussein, Hussein A., Ali J. Mahdi, and Thamir M. Abdul-Wahhab. "Current-Control Inverter Schemes for a Grid-Connected PV Generator." IOP Conference Series: Materials Science and Engineering 1105, no. 1 (2021): 012018. http://dx.doi.org/10.1088/1757-899x/1105/1/012018.

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14

Shi, Jie, and Xiangzheng Xu. "A Robust Control Scheme for Dynamic Voltage Restorer with Current Limiting Capability." Sustainability 14, no. 24 (2022): 16752. http://dx.doi.org/10.3390/su142416752.

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In this paper, a second order sliding mode control scheme is utilized for outer voltage loop of a three-phase fault current limiter-based dynamic voltage restorer (FCL-DVR) instead of a conventional proportional integral/proportional resonance (PI/PR) controller. The new control strategy improves the dynamic performance of the FCL-DVR against voltage distortion. Furthermore, by using the proposed robustness controller, the FCL-DVR can smoothly switch between the FCL and DVR operation modes. Compared with other existing control schemes, the proposed control strategy for the FCL mode can still w

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15

Garrido, Izaskun, Aitor J. Garrido, Jesús A. Romero, Edorta Carrascal, Goretti Sevillano-Berasategui, and Oscar Barambones. "Low EffortLiNuclear Fusion Plasma Control Using Model Predictive Control Laws." Mathematical Problems in Engineering 2015 (2015): 1–8. http://dx.doi.org/10.1155/2015/527420.

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One of the main problems of fusion energy is to achieve longer pulse duration by avoiding the premature reaction decay due to plasma instabilities. The control of the plasma inductance arises as an essential tool for the successful operation of tokamak fusion reactors in order to overcome stability issues as well as the new challenges specific to advanced scenarios operation. In this sense, given that advanced tokamaks will suffer from limited power available from noninductive current drive actuators, the transformer primary coil could assist in reducing the power requirements of the noninduct

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16

Pidikiti, Tripura, and Tulasi Ram Das G. "Modelling and simulation of ZDC controlled PMSG based wind energy conversion system." International Journal of Engineering & Technology 7, no. 1.8 (2018): 46. http://dx.doi.org/10.14419/ijet.v7i1.8.9449.

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This paper presents the comparison of dynamic performance and steady state operation of PMSG wind energy conversion systems with two modulation techniques. Voltage oriented control (VOC) is used for grid-connected converter along with sinusoidal pulse width modulation (SPWM) and Space Vector Modulation (SVM) schemes. The generator is controlled by using zero d- axis current (ZDC) control scheme along with optimal torque control (OTC). Performance comparison with two pulse width modulation schemes through simulation results are presented for 2MW/ 690V/ 9.75Hz Non-Salient Pole PMSG using MATLAB/

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17

Jayasawal, Kishan, and Khagendra Thapa. "An Enhanced Low Voltage Ride-Through Control Scheme of a DIFG based WTG Using Crowbar and Braking Chopper." Journal of the Institute of Engineering 16, no. 1 (2021): 61–67. http://dx.doi.org/10.3126/jie.v16i1.36537.

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The grid codes define low voltage ride-through (LVRT) as capability of wind turbine generator (WTG) to support the grid voltage by injecting reactive power and suppress the rise of DC-link voltage and inrush rotor current in the rotor side converter (RSC) of the doubly fed induction generator (DFIG) during a fault. Moreover, the rotor current increases significantly during severe disturbances if any protection schemes are not employed. Therefore, the protection schemes must be used to avoid the damage to the converter during a fault. This paper proposes an enhanced LVRT control scheme of a DFI

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18

Chong, Zhi Lin, Shuo Huang, Amitava Mukherjee, and Jun Yang. "Performance comparisons of distribution-free Shewhart-type Lepage and Cucconi schemes in monitoring complex process distributions." Transactions of the Institute of Measurement and Control 42, no. 14 (2020): 2787–811. http://dx.doi.org/10.1177/0142331220932466.

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In recent years, researchers introduced several distribution-free schemes for simultaneously monitoring the location and scale parameters of distribution in the literature related to process monitoring and control. To this end, the Shewhart-Lepage (SL) and Shewhart-Cucconi (SC) schemes are two fundamental distribution-free schemes. These schemes are primarily designed to monitor the location-scale family of densities. In practice, apart from the location and scale parameters, we often encounter the presence of a shape (or skewness) parameter. In this article, we investigate the performance of

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19

Abedinzadeh, Taher, and Sajjad Tohidi. "A comprehensive sensorless control of DFIG-based wind turbines." COMPEL: The International Journal for Computation and Mathematics in Electrical and Electronic Engineering 35, no. 1 (2016): 27–43. http://dx.doi.org/10.1108/compel-09-2014-0236.

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Purpose – The purpose of this paper is to present an improved approach for estimation of the rotor position and speed of doubly fed induction generator, which can be used in vector control and direct torque control (DTC) schemes. Design/methodology/approach – Some novel equations are developed for calculation of the rotor position and rotor speed. Such equations do not need to the value of stator flux linkage and just, measured values of the stator voltage and currents as well as rotor current are required to be known. Findings – The simulation results verify the satisfactory steady-state and

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20

To, Hoang-Linh, Thuyen Minh Thi, and Won-Joo Hwang. "Cascade Probability Control to Mitigate Bufferbloat under Multiple Real-World TCP Stacks." Mathematical Problems in Engineering 2015 (2015): 1–13. http://dx.doi.org/10.1155/2015/628583.

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Persistently full buffer problem, commonly known as bufferbloat, causes unnecessary additional latency and throughput degradation whenever congestion happens in Internet. Several proposed queue management schemes, with the debloat mission, are almost based on the modification of one-loop feedback control where the instability and bad transient behavior are still big challenges. In this paper, we present a cascade probability control scheme using margin optimal method to address such challenges under different kinds of real-world TCP stacks. Simulation results guarantee the measured round trip

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21

Mu, Weilei, Yuxue Wang, Hailiang Sun, and Guijie Liu. "Double-Loop Sliding Mode Controller with An Ocean Current Observer for the Trajectory Tracking of ROV." Journal of Marine Science and Engineering 9, no. 9 (2021): 1000. http://dx.doi.org/10.3390/jmse9091000.

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To solve the trajectory tracking problem of insufficient response and the large tracking error of remotely operated vehicles (ROVs) under the interference of large ocean currents, this paper proposes a double-loop sliding mode controller with an ocean current observer. The designed controller consisted of an outer-loop controller (the position controller) and an inner-loop controller (the velocity controller): the outer controller was designed by the position error, and a reference velocity was created for the inner loop to achieve accurate positioning and attitude tracking. The reference cont

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22

Cortes-Vega, David, Hussain Alazki, and Jose Luis Rullan-Lara. "Current Sensorless MPPT Control for PV Systems Based on Robust Observer." Applied Sciences 12, no. 9 (2022): 4360. http://dx.doi.org/10.3390/app12094360.

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Photovoltaic (PV) systems are among the most used alternatives for electrical power generation from renewable sources. To ensure that PV systems make the most of the available solar energy, maximum power point tracking (MPPT) schemes must be implemented, which usually require voltage and current sensors to track the PV power. This paper presents the design of a robust observer using the Attractive Ellipsoid Method to achieve a precise estimation of PV current under parametric uncertainty and output perturbations. The application of such an observer enables the PV generation system to operate i

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23

Cortes-Vega, David, Hussain Alazki, and Jose Luis Rullan-Lara. "Current Sensorless MPPT Control for PV Systems Based on Robust Observer." Applied Sciences 12, no. 9 (2022): 4360. http://dx.doi.org/10.3390/app12094360.

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Photovoltaic (PV) systems are among the most used alternatives for electrical power generation from renewable sources. To ensure that PV systems make the most of the available solar energy, maximum power point tracking (MPPT) schemes must be implemented, which usually require voltage and current sensors to track the PV power. This paper presents the design of a robust observer using the Attractive Ellipsoid Method to achieve a precise estimation of PV current under parametric uncertainty and output perturbations. The application of such an observer enables the PV generation system to operate i

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24

Routray, Abhinandan, and Sung-Ho Hur. "Leakage Current Mitigation of Photovoltaic System Using Optimized Predictive Control for Improved Efficiency." Applied Sciences 12, no. 2 (2022): 643. http://dx.doi.org/10.3390/app12020643.

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This paper proposes an optimized predictive control strategy to mitigate the potential leakage current of grid-tied photovoltaic (PV) systems to improve the lifespans of PV modules. In this work, the PV system is controlled with an optimized predictive control algorithm that selects the switching voltage vectors intelligently to reduce the number of computational burdens. Thus, it improves the dynamic performance of the overall system. This is achieved through a specific cost function that minimizes the change in common-mode voltage generated by the parasitic capacitance of PV modules. The pro

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25

Chakkirala, Sudhakarababu, and Mummadi Veerachary. "Stability Analysis of Fixed and Variable Frequency Digital Predictive Current Control Schemes." IEEJ Transactions on Industry Applications 127, no. 12 (2007): 1205–14. http://dx.doi.org/10.1541/ieejias.127.1205.

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26

Liang, Gan Jia, Zhang Hong Xia, and Zhao Jin. "Fuzzy Logic based Current Control Schemes for Vector-controlled Asynchronous Motor Drives." Information Technology Journal 9, no. 7 (2010): 1495–99. http://dx.doi.org/10.3923/itj.2010.1495.1499.

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27

Rathore, Anurag S., Somesh Mishra, Saxena Nikita, and Priyanka Priyanka. "Bioprocess Control: Current Progress and Future Perspectives." Life 11, no. 6 (2021): 557. http://dx.doi.org/10.3390/life11060557.

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Typical bioprocess comprises of different unit operations wherein a near optimal environment is required for cells to grow, divide, and synthesize the desired product. However, bioprocess control caters to unique challenges that arise due to non-linearity, variability, and complexity of biotech processes. This article presents a review of modern control strategies employed in bioprocessing. Conventional control strategies (open loop, closed loop) along with modern control schemes such as fuzzy logic, model predictive control, adaptive control and neural network-based control are illustrated, a

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28

Adel, Mohamed, and Tarek Kandil. "Assessment of Direct and Indirect Current Control Techniques Applied to Active Power Filters." Recent Advances in Electrical & Electronic Engineering (Formerly Recent Patents on Electrical & Electronic Engineering) 13, no. 8 (2020): 1256–65. http://dx.doi.org/10.2174/2352096513999200710143353.

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Background: In this paper, an assessment of active power filter (APF) performance is presented under direct and indirect current control schemes through on-line compensation theory. Methods: Conventional Direct Current Control (DCC) measures both load current and filter current beside source and DC-link voltages, while Indirect Current Control (ICC) measures only source current beside voltage measurements. Both DCC and ICC control algorithms are implemented using 80C196KC low-cost microcontroller. Results: The performance parameters of APF are compared under two methods, and it is assigned tha

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29

Lei, Jiaxing, Chaofan Wei, and Shuang Feng. "Input Disturbance Suppression for Unidirectional Matrix Converter with a Stability-Enhancing Modulation Scheme." Energies 12, no. 13 (2019): 2625. http://dx.doi.org/10.3390/en12132625.

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This paper proposes an input voltage disturbance suppression control strategy for the unidirectional matrix converter (UMC) with a new modulation scheme enhancing the stability. In the new scheme, the modulation index is directly, rather than reversely, proportional to the instantaneous amplitude of input filter capacitor voltages. Contrary to traditional schemes, the stability of the UMC with this new scheme is even better with the increase of the transferred active power, which is particularly suitable for applications with sinusoidal and balanced input conditions. As to the disturbed input

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Sun, Zhenxing, Shihua Li, Jiegao Wang, Xinghua Zhang, and Xiaohui Mo. "Adaptive composite control method of permanent magnet synchronous motor systems." Transactions of the Institute of Measurement and Control 40, no. 11 (2017): 3345–57. http://dx.doi.org/10.1177/0142331217719956.

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With the development of digital signal processes, the relative differences of PMSM single loop in control periods between the speed loop and current loops are becoming smaller or even vanishing. Therefore, cascade control schemes seem to be unnecessary. In addition, considering the effects of disturbances and the variety of moments of inertia, this paper proposes a scheme using an adaptive non-cascade control method to design the controller, which merges speed loop and q-axis current loop into one single loop. First, an extended state observer (ESO) is employed to estimate the disturbances of

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31

Zhou, Sizhan, Yan Zhang, Zeng Liu, Jinjun Liu, and Linyuan Zhou. "Implementation of Cross-Coupling Terms in Proportional-Resonant Current Control Schemes for Improving Current Tracking Performance." IEEE Transactions on Power Electronics 36, no. 11 (2021): 13248–60. http://dx.doi.org/10.1109/tpel.2021.3080131.

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32

Yang, Xiaodong, Aijia Chen, Zhisong Wang, and Shudong Li. "Cloud Storage Data Access Control Scheme Based on Blockchain and Attribute-Based Encryption." Security and Communication Networks 2022 (May 11, 2022): 1–12. http://dx.doi.org/10.1155/2022/2204832.

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Cloud storage is a popular model of the application in various fields, and the security of storage data and access permission have been widely considered. Attribute-based encryption (ABE) provides fine-grained user access control and ensures data confidentiality. However, current ABE access control schemes rely on trusted cloud servers and provide a low level of security. To solve these problems of traditional encryption schemes, we propose a blockchain-based and ABE cloud storage data access control scheme. In this article, blockchain and smart contract technology are the core elements to ens

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33

Ghai, Shilpy, Vijay Kumar, and Rohit Vaid. "Dynamic Queue Synchronization for Congestion Control Over Wireless Sensor Networks." Journal of Computational and Theoretical Nanoscience 17, no. 6 (2020): 2562–74. http://dx.doi.org/10.1166/jctn.2020.8931.

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Congestion control over resource constrained sensor network is a critical challenge and it is also quite hard to fulfill the QoS constraints for end users. In this paper, a dynamic queue synchronization (DQS) scheme is introduced that can alter the data rate dynamically as per the current buffer length. Its performance is compared with existing schemes i.e., Dynamic Round Robin (DRR) and Random Early Discard (RED) using different routing protocols i.e., LEACH/PEGASIS/TEEN under various constraints (Throughput/End-to-End Delay/Routing Load/Energy).

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Wei, Lulu, Daofeng Li, and Zhiqiang Liu. "Provable Secure Attribute-Based Proxy Signature Over Lattice Small Integer Solution Problem in Random Oracle Model." Electronics 12, no. 7 (2023): 1619. http://dx.doi.org/10.3390/electronics12071619.

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Current proxy signature schemes are mostly identity-based proxy signatures that distinguish users by identity. This signature method faces some problems, such as identity information leakage and single access control. Attribute-based proxy signature (ABPS) divides the signer’s identity information into a collection of attributes; thus, users’ identity information can be protected and access control can become fine-grained. With the development of quantum computers, the security of signature schemes based on traditional number theory problems is under threat. Therefore, we construct a new attri

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35

Jastrzębski, Rafał P., Alexander Smirnov, and Olli Pyrhönen. "Force Controllers for AMB Systems with Position and Current Feedback." Solid State Phenomena 198 (March 2013): 495–500. http://dx.doi.org/10.4028/www.scientific.net/ssp.198.495.

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In this paper, the state-of-the-art AMB controller structure, with an outer centralized position control loop with reference currents and inner current control loops, is replaced with an outer control loop with force references and inner flux control loops. The linearization of the force actuators and different control schemes of the centralized outer control for the radial suspension are considered. The operation of the proposed control under a zero bias is verified by simulations. The proposed control solution can achieve a dynamic performance comparable with that of a controller with the cl

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Shen, Dawei, Wei Yan, Yuhuai Peng, Yanhua Fu, and Qingxu Deng. "Congestion Control and Traffic Scheduling for Collaborative Crowdsourcing in SDN Enabled Mobile Wireless Networks." Wireless Communications and Mobile Computing 2018 (2018): 1–11. http://dx.doi.org/10.1155/2018/9821946.

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Currently, a number of crowdsourcing-based mobile applications have been implemented in mobile networks and Internet of Things (IoT), targeted at real-time services and recommendation. The frequent information exchanges and data transmissions in collaborative crowdsourcing are heavily injected into the current communication networks, which poses great challenges for Mobile Wireless Networks (MWN). This paper focuses on the traffic scheduling and load balancing problem in software-defined MWN and designs a hybrid routing forwarding scheme as well as a congestion control algorithm to achieve the

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Patel, Hardik, and Ankit Shah. "Boundary-Based Hybrid Control Algorithm for Switched Boost Converter Operating in CCM and DCM." International Journal of Electrical and Electronics Research 11, no. 1 (2023): 213–21. http://dx.doi.org/10.37391/ijeer.110129.

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It is essential to have enhanced efficiency for the DC-DC converters operating in continuous conduction mode (CCM) and discontinuous conduction mode (DCM). This requires a hybrid controller designed using pulse width modulation (PWM) and pulse frequency modulation (PFM) schemes. This paper fixates on a boundary-based hybrid control algorithm for the second-order DC-DC converter - the switched boost converter. The proposed algorithm works in PWM control scheme for CCM operation, whereas DCM operation uses PFM control scheme. The boundary conditions are defined by the load current, output voltag

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Patel, Arpitkumar J., and Amit V. Sant. "EV charging station with cascaded low-pass filtering scheme-based control of unified power quality conditioner." Clean Energy 6, no. 5 (2022): 738–61. http://dx.doi.org/10.1093/ce/zkac052.

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Abstract This paper proposes a cascaded low-pass filter (CLPF) scheme for the control of a unified power quality conditioner (UPQC) installed for enhancing the power quality of an electric vehicle (EV) charging station. With the incorporation of UPQC, the EV charging station draws sinusoidal currents at unity power factor and the supply voltage is maintained at the nominal value at the charger input. In the CLPF scheme, the α–β components of the load current are individually processed through a cascade connection of two LPFs to determine the corresponding fundamental orthogonal components. Bas

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Han, Yang, Pan Shen, Xin Zhao, and Josep M. Guerrero. "Control Strategies for Islanded Microgrid Using Enhanced Hierarchical Control Structure With Multiple Current-Loop Damping Schemes." IEEE Transactions on Smart Grid 8, no. 3 (2017): 1139–53. http://dx.doi.org/10.1109/tsg.2015.2477698.

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Lu, Hua Cai, Ming Jiang, Qi Gong Chen, and Li Sheng Wei. "Sensorless Position Control of Surface Permanent Magnet Linear Synchronous Motors." Applied Mechanics and Materials 88-89 (August 2011): 165–69. http://dx.doi.org/10.4028/www.scientific.net/amm.88-89.165.

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In this paper, a novel sensorless position control for a surface permanent magnet linear synchronous motor (SPMLSM) is presented. The position and speed of the SPMLSM drive is obtained through a closed loop observer by only measuring phase voltages and currents. Estimation of speed is done using difference between estimates of the current derivatives in the dq frame, which calculated two different ways: first using a high-gain observer, and then using the motor model. Estimation of the mover position is done through integrating the estimation of speed. The proposed scheme works in a closed loo

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Premkumar, Manoharan, Kanagarathinam Karthick, and Rayichandran Sowmya. "A Review on Solar PV Based Grid Connected Microinverter Control Schemes and Topologies." International Journal of Renewable Energy Development 7, no. 2 (2018): 171–82. http://dx.doi.org/10.14710/ijred.7.2.171-182.

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From the last decade, there is an increase in the demand of electricity, this will causing depletion in the fossil fuels which results increase in cost. So the focus is shifted to use of renewable energy sources along with the only utility grid but it is not sufficient to supply the power different loads. To overcome these problems, micro-grid (MG) is introduced and it is powered by renewable distributed generation (DG) systems, such as, micro turbines, fuel cells, PV and wind generation due to the limited fossil fuel. Out of the above sources, solar energy provides extraordinary benefits incl

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Merabet, Adel. "Advanced Control for Electric Drives: Current Challenges and Future Perspectives." Electronics 9, no. 11 (2020): 1762. http://dx.doi.org/10.3390/electronics9111762.

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In the Special Issue “Advanced Control for Electric Drives”, the objective is to address a variety of issues related to advances in control techniques for electric drives, implementation challenges, and applications in emerging fields such as electric vehicles, unmanned aerial vehicles, maglev trains and motion applications. This issue includes 15 selected and peer-reviewed articles discussing a wide range of topics, where intelligent control, estimation and observation schemes were applied to electric drives for various applications. Different drives were studied such as induction motors, per

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Kuchar, Martin, Petr Palacky, Daniela Perdukova, and Martin Sobek. "Compensation of Torque-Producing Stator Current Error for Vector-Controlled Induction Motor Drives." Energies 15, no. 3 (2022): 815. http://dx.doi.org/10.3390/en15030815.

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This paper presents a detailed analysis of dynamic properties and accuracy issues of the torque-producing stator current control loop for vector-controlled induction motor drives. In this paper, a necessary mathematical description of vector control of an induction motor is shown with respect to the x-axis and y-axis current control in the rotating reference frame. A derivation of a steady-state error for the torque-producing stator current control scheme with and without a decoupling algorithm is described. The presented derivation and dynamic behavior of both these schemes were extensively t

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Yoo, Jeong-Un, and Il-Suek Koh. "Comparison of Linear Iteration Schemes to Improve the Convergence of Iterative Physical Optics for an Impedance Scatterer." Journal of Electromagnetic Engineering and Science 23, no. 1 (2023): 78–80. http://dx.doi.org/10.26866/jees.2023.1.l.12.

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The conventional iterative physical optics (IPO) method updates the surface current based on the Jacobi iteration scheme, which typically diverges for large objects. To control the convergence property of the IPO method, other iteration schemes, such as Gauss–Seidel and successive over-relaxation, can be used. In this study, we compare the convergence properties of three iteration schemes for scatterings by five scatterers comprising electrically perfect or imperfect conductors modeled with an impedance material. The accuracy of the IPO method is compared with that of the multi-level fast mult

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Ledesma, Pablo, and Julio Usaola. "Contribution of Variable-Speed Wind Turbines to Voltage Control." Wind Engineering 26, no. 6 (2002): 347–58. http://dx.doi.org/10.1260/030952402765173349.

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Variable speed, grid connected, wind turbines open new possibilities for voltage control, because they use electronic converters, which may regulate the reactive power interchange with the grid. This paper proposes two voltage control schemes for variable speed wind turbines with double-fed induction generator. The first scheme acts on the wind-turbine power factor, while the latter acts directly on the converter current. Advantages and drawbacks of both techniques are discussed. Both control techniques have been tested by simulations of a base case, which represent a synchronous generator, a

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Nalina, B. S., and V. J. Vijayalakshmi. "Comparison of Current Control Strategies of Shunt Active Power Filter ." Applied Mechanics and Materials 573 (June 2014): 59–65. http://dx.doi.org/10.4028/www.scientific.net/amm.573.59.

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Nowadays the number of non linear loads in power systems is increasing dramatically. These non linear loads inject harmonic currents and voltage which makes the supply currents non-sinusoidal. These harmonics are eliminated via an active power filter. The reference currents are generated by shunt active filter which is provided to compensate harmonic currents demanded by the load. Different current control strategies are implemented to improve the performance of shunt active power filter. These techniques are useful in making the supply currents sinusoidal. The performance of the current contr

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Xu, Zhen Yu, Bing Zhang, and Xu Zhang. "Comparison of Feedback Loop Control Schemes for Inverters in Microgrids." Advanced Materials Research 748 (August 2013): 444–48. http://dx.doi.org/10.4028/www.scientific.net/amr.748.444.

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In this paper, two multiple feedback loop control schemes for inverters of distributed generators and energy storage system in a microgrid are described. Both of the droop control method and V/F control method are based on the voltage and the current controllers . A detailed comparison of the simulation results show the advantages and disadvantages of the two methods.

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Li, Zhao, and Shuiyuan Huan. "Multi-Level Attribute-Based Encryption Access Control Scheme for Big Data." MATEC Web of Conferences 173 (2018): 03047. http://dx.doi.org/10.1051/matecconf/201817303047.

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There are many security threats such as data’s confidentiality and privacy protection in the new application scenario of big data processing, and for the problems such as coarse granularity and low sharing capability existing in the current research on big data access control, a new model to support fine-grained access control and flexible attribute change is proposed. Based on CP-ABE method, a multi-level attribute-based encryption scheme is designed to solve fine-grained access control problem. And to solve the problem of attribute revocation, the technique of re-encryption and version numbe

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Zhang, Ming, Kaicheng Li, Shunfan He, and Jun Wang. "DESIGN AND TEST OF A NEW HIGH-CURRENT ELECTRONIC CURRENT TRANSFORMER WITH A ROGOWSKI COIL." Metrology and Measurement Systems 21, no. 1 (2014): 121–32. http://dx.doi.org/10.2478/mms-2014-0012.

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Abstract This paper describes the design and test of a new high-current electronic current transformer based on a Rogowski coil. For better performances, electronic current transformers are used to replace conventional electro-magnetic inductive current transformers based on ferromagnetic cores and windings to measure high-current on the high voltage distribution grids. The design of a new high-current electronic current transformer is described in this paper. The principal schemes of the prototype and partial evaluation results are presented. Through relative tests it is known that the protot

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Usama, Muhammad, and Jaehong Kim. "Improved Self-Sensing Speed Control of IPMSM Drive Based on Cascaded Nonlinear Control." Energies 14, no. 8 (2021): 2205. http://dx.doi.org/10.3390/en14082205.

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This paper presents a nonlinear cascaded control design that has been developed to (1) improve the self-sensing speed control performance of an interior permanent magnet synchronous motor (IPMSM) drive by reducing its speed and torque ripples and its phase current harmonic distortion and (2) attain the maximum torque while utilizing the minimum drive current. The nonlinear cascaded control system consists of two nonlinear controls for the speed and current control loop. A fuzzy logic controller (FLC) is employed for the outer speed control loop to regulate the rotor shaft speed. Model predicti

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