Article
Automation & Control Systems
Changwei Qin, Xiangyang Xing, Ying Jiang
Summary: This article proposes a topology and space vector modulation (SVM) method for a reduced switch count quasi-Z-source (QZS) three-level inverter, which can achieve voltage buck-boost operation with only ten power switches. Compared with the QZS three-level T-type inverter, the presented inverter further reduces the number of power switches. The SVM method is designed to actively balance the neutral-point voltage (NPV) with the introduction of a distribution factor. In addition, the insertion of up-shoot-through and down-shoot-through states within redundant small vectors boosts the dc input voltage without affecting the normal ac output voltage.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Shirazul Islam, Marif Daula Siddique, Atif Iqbal, Saad Mekhilef, Mohammed Al-Hitmi
Summary: This article proposes a single-phase inverter based on a 13-level switched capacitor multilevel inverter (SC-MLI), which realizes the desired levels of output voltage with a reduced number of switches. The proposed inverter achieves improved power density by requiring fewer gate drivers. Additionally, the capacitors in the proposed SC-MLI maintain self-voltage balancing without requiring complex control strategies, making it highly competent in achieving good power quality.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2022)
Article
Automation & Control Systems
Jingmei Zhang, Yi Pang, Kai Wang, Dongxing Xu, Lei Pan
Summary: This article explains the equivalent mechanism between a nine-switch converter (NSC) and two six-switch converters (SSCs) in detail. It introduces the concept of virtual legs and space vector modulation method for achieving decoupling and independent control of NSC, respectively. The proposed modulation method allows NSC to control two sets of three-phase ac voltage independently, achieving the same performance as dual SSCs.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2021)
Article
Engineering, Electrical & Electronic
Changwei Qin, Xiaoyan Li
Summary: This article presents an improved virtual space vector modulation scheme for the reduced switch count three-level inverter with balanced and unbalanced neutral-point voltage (NPV) conditions. The new virtual vectors are constructed by considering the effects of unbalanced NPV conditions on basic voltage vectors. An optimized control scheme is developed to obtain the optimized distribution factor and adjust the relative durations of P-type and N-type small vectors to control the voltages across two dc-link capacitors separately. The feasibility of the proposed scheme is verified by simulated and experimental results.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Electrical & Electronic
Xiaoyan Li, Changwei Qin, Zhiyuan Chu, Jingyang Fang
Summary: A novel modulation method is proposed for a reduced switch count quasi-Z-source three-level inverter, which optimizes the preselected basic vectors and introduces a distribution factor to control the imbalance of common-mode voltage and neutral-point voltage. Compared with traditional methods, the proposed method reduces the magnitude of common-mode voltage by 50% and actively controls the balanced neutral-point voltage.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2023)
Article
Engineering, Multidisciplinary
Swapan Kumar Baksi, Ranjan Kumar Behera
Summary: In this paper, a new single-phase seven-level boosted ANPC (7L-BANPC) multilevel inverter is proposed, which uses 8 switches, one floating capacitor, and one dc source. The proposed inverter can achieve 1.5 times voltage boosting and requires a lower switch voltage rating. With lower rating switching devices and a reduced number of total conducting switches, the proposed inverter significantly improves efficiency. The performance of the proposed inverter and the grid-connected SPV system under different conditions is simulated and tested, and a comparison with existing topologies demonstrates the benefits of the proposed inverter.
IEEE TRANSACTIONS ON INDUSTRY APPLICATIONS
(2023)
Article
Automation & Control Systems
Manxin Chen, Yongheng Yang, Poh Chiang Loh, Frede Blaabjerg
Summary: This article proposes a novel single-phase nine-level inverter based on a switched-capacitor network, which reduces the number of switches and increases the output voltage gain, effectively reducing the voltage stresses on power devices and minimizing power loss.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Reza Barzegarkhoo, Majid Farhangi, Sze Sing Lee, Ricardo P. Aguilera, Yam P. Siwakoti, Josep Pou
Summary: This article proposes a novel single-source common-grounded step-up nine-level inverter for high-frequency ac microgrids powered by renewable energy sources. The inverter features a compact design, efficient performance, and eliminates leakage current concerns.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Engineering, Electrical & Electronic
Peng Yang, Wenlong Ming, Jun Liang, Carlos E. Ugalde-Loo, Rukshan Navaratne, Omar Ellabban, Ingo Ludtke
Summary: This article introduces an improved neutral leg for three-phase four-wire inverters, which provides power and reduces second-order ripples on the dc bus in EV chargers. Compared to a conventional neutral leg, the improved leg can reduce the dc capacitance by 50% and has a control strategy with power decoupling capability.
IEEE TRANSACTIONS ON TRANSPORTATION ELECTRIFICATION
(2022)
Article
Engineering, Electrical & Electronic
Atif Iqbal, Marif Daula Siddique, B. Prathap Reddy, Pandav Kiran Maroti
Summary: This letter proposes a single-source-driven quadruple boost multilevel inverter topology (QB-MLI) capable of producing nine levels of voltage in output by effectively balancing the capacitor voltage with the associated control logic. Compared with other SC MLIs, the proposed QB-MLI has fewer resources and shows better performance.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2021)
Article
Computer Science, Information Systems
Farzad Sagvand, Jafar Siahbalaee, Amangaldi Koochaki
Summary: Multilevel inverters use multiple DC sources, capacitors, switches, and diodes to provide high power quality voltage to loads. However, the increased number of semiconductor devices and capacitors results in higher losses, costs, and decreased efficiency. This paper proposes an asymmetrical multilevel inverter with 19-level output voltages, achieved with fewer switches and capacitors compared to other topologies. Experimental validation demonstrates good performance, meeting IEEE standards with a total harmonic distortion of 7.4%.
Article
Engineering, Electrical & Electronic
Ratna Rahul Tupakula
Summary: This paper presents a new topology-based single-phase cascaded multilevel inverter with reduced power electronic switches, introducing a new basic unit and H-bridge to generate required voltages while decreasing switch count and driver circuits, thereby improving power quality. The developed 9-level cascaded multilevel inverter topology is validated through simulations and experimentation, showing advantages in reducing stresses in voltage.
ELECTRICAL ENGINEERING
(2021)
Article
Automation & Control Systems
Ali Seifi, Majid Hosseinpour, Abdolmajid Dejamkhooy
Summary: This paper presents a new single-phase cascaded multilevel inverter, which forms the inverter structure by series connecting basic units to improve performance and reduce the blocking voltage of switching devices. Its performance is verified through laboratory prototype evaluation.
TRANSACTIONS OF THE INSTITUTE OF MEASUREMENT AND CONTROL
(2021)
Article
Engineering, Electrical & Electronic
Marif Daula Siddique, B. Prathap Reddy, Atif Iqbal, Saad Mekhilef
Summary: The proposed ANPC inverter topology utilizes a floating capacitor to increase the output voltage, reducing the DC link requirement and minimizing inverter complexities; the neutral point in the topology is directly connected to the load terminals, making it suitable for solar PV integration.
IET POWER ELECTRONICS
(2021)
Article
Green & Sustainable Science & Technology
Zahra Sadeghi, Mahdi Shahparasti, Amirhossein Rajaei, Hannu Laaksonen
Summary: This paper presents a power conversion system consisting of a Vienna rectifier and a two/three level hybrid inverter as a machine-side inverter to drive a permanent-magnet synchronous motor (PMSM). The system offers high output current quality with a lower number of active switches, making it compact and cost-effective. The proposed system utilizes field-oriented control (FOC) and sliding mode observer (SMO) for sensorless control, providing accurate estimation of rotor position and velocity.
Article
Automation & Control Systems
Mohsen Jorjani, Hossein Seifi, Ali Yazdian Varjani
Summary: The article introduces a new algorithm for detecting false data injection attacks (FDIAs) using outlier detection techniques on state estimation results and a graph-theory-based approach to detect potential attacks, and the algorithm demonstrates satisfactory performance in detecting both types of FDIAs in IEEE 14 bus and 118 bus test systems.
IEEE TRANSACTIONS ON INDUSTRIAL INFORMATICS
(2021)
Article
Engineering, Electrical & Electronic
Mohsen Jorjani, Hossein Seifi, Ali Yazdian Varjani, Hamed Delkhosh
Summary: The increasing integration of communication technologies into power grids has raised concerns about cyber security. Researchers have proposed various methods to detect and recover the true values of attacked grid variables after False Data Injection Attacks (FDIAs). The iterative optimization-based approach shows satisfactory performance in simulated experiments.
IEEE TRANSACTIONS ON SMART GRID
(2021)
Article
Engineering, Electrical & Electronic
Elaheh Heydari, Ali Yazdian Varjani, Demba Diallo
Summary: Photovoltaic energy is a widely used renewable energy source. However, single-stage systems have limitations in their operating range and suffer from pulsating power issues. To address these problems, a dual-function decoupling circuit is proposed and a 1 kW test bench is designed for verification.
IEEE TRANSACTIONS ON POWER ELECTRONICS
(2022)
Article
Automation & Control Systems
Pouria Sarvghadi, Ali Yazdian Varjani, Mahdi Shahparasti
Summary: This article presents a new high step-up transformerless dc-dc converter based on a voltage multiplier and a coupled inductor topology. The converter achieves high voltage gain by adjusting the turn ratio of two coupled inductors and the duty cycle, resulting in simple control and low conduction loss. Additionally, the converter reduces the total voltage stresses of active elements, leading to increased efficiency. Experimental test results confirm the steady-state performance and theoretical achievements of the converter using a 200-W dc-dc prototype.
IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Safa Mashali, Ali Yazdian Varjani
Summary: In this paper, a new Energy Harvesting Power Electronic Interface (EHPEI) is proposed, which is suitable for low-power, low-voltage energy harvesting applications. It combines two boost converters and a voltage multiplier cell (VMC) to form a modular structure. The output voltage can be regulated by adjusting the duty cycles of the switches. The EHPEI improves reliability and stability in energy harvesting applications by utilizing two power sources and allowing them to supply power to the load independently or simultaneously. The use of VMC also reduces voltage stress on switches and diodes. The operation principle and steady-state analysis of continuous conduction mode (CCM) are used for determining the voltage gain. Simulation results are provided to validate the performance and effectiveness.
2023 14TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE, PEDSTC
(2023)
Proceedings Paper
Engineering, Electrical & Electronic
Seyed Mohsen Salehi, Ali Yazdian
Summary: DC-DC converters are important in technology applications, and high voltage gain step-up converters are widely used. However, these converters have non-minimum phase behavior due to a zero point in the right half plane, which leads to slow dynamic response and limited stability margin. To address these issues, a minimum-phase step-up DC-DC converter with high voltage gain is proposed, using a four-winding coupled inductor to increase the voltage gain.
2023 14TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE, PEDSTC
(2023)
Proceedings Paper
Energy & Fuels
N. Dehbashi, M. SeyyedHosseini, A. Yazdian-Varjani
Summary: Induction motors, especially three-phase induction motors, are widely used in the industry due to their outstanding features compared to others. The use of IoT in the control and monitoring of electric motors leads to the formation of smart drives, providing benefits such as reducing maintenance costs and improving reliability.
2022 13TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE (PEDSTC)
(2022)
Proceedings Paper
Energy & Fuels
Sina Bajelvand, Ali Yazdian Varjani, Amir Babaki, Sadegh Vaez-Zadeh, Alireza Jafari-Natanzi
Summary: This paper proposes an SS WPT system using variable frequency and impedance matching mechanism to achieve maximum efficiency, while employing a CP-CV charging algorithm to increase charging speed.
2022 13TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE (PEDSTC)
(2022)
Proceedings Paper
Energy & Fuels
Sina Bajelvand, Alireza Jafari-Natanzi, Ali Yazdian Varjani, Sadegh Vaez-Zadeh, Amir Babaki
Summary: Choosing the appropriate charging algorithm and maintaining high system efficiency are crucial for wireless power transmission (WPT) systems. This paper proposes a WPT system with series-series compensation and 150W power, which achieves high efficiency during the constant power constant voltage (CP-CV) charging process using a semi-active rectifier and a switch-controlled capacitor, without requiring a connection between the transmitter and receiver.
2022 13TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE (PEDSTC)
(2022)
Proceedings Paper
Engineering, Electrical & Electronic
Masood Soleimanifard, Ali Yazdian Varjani
Summary: This paper investigates the effect of the magnetizing inductance of the transformer on the output power value and ZVS range with the EPS control method, showing the correctness of the theoretical analysis through simulation results.
2021 29TH IRANIAN CONFERENCE ON ELECTRICAL ENGINEERING (ICEE)
(2021)
Proceedings Paper
Engineering, Electrical & Electronic
Danesh Amani, Ali Valizadeh, Reza Beiranvand, Ali Yazdian Varjani
Summary: This study presents a new high step up converter based on a three-winding coupled inductor, with ZVS and ZCS characteristics to reduce switching losses, achieve higher switching frequency, lower EMI noises, and improve efficiency. It is ideal for low power photovoltaic applications.
2021 29TH IRANIAN CONFERENCE ON ELECTRICAL ENGINEERING (ICEE)
(2021)
Proceedings Paper
Energy & Fuels
Ali Valizadeh, Ali Yazdian Varjani
Summary: This paper proposes a bridgeless AC/DC converter for power factor correction, which eliminates the diode bridge rectifier by reducing the number of switches to alleviate conduction losses, provides ZVS condition to reduce switching losses, and achieves ZCS turn-off for output diodes through a series resonant circuit to eliminate reverse recovery losses.
2021 12TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE (PEDSTC)
(2021)
Proceedings Paper
Energy & Fuels
Pouria Sarvghadi, Ali Yazdian Varjani
Summary: This paper introduces a new topology of high step-up non-isolated DC-DC converter, which adopts a modified voltage multiplier cell using coupling inductor to achieve high voltage gain and efficiency, with the benefits of low number of elements and continuous input current.
2021 12TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE (PEDSTC)
(2021)
Proceedings Paper
Energy & Fuels
Masood Soleimanifard, Ali Yazdian Varjani
Summary: This paper investigates how to achieve ZVS capability in a DAB structure using buck-boost topology and simplifies the structure with the SPS switching strategy. Simulation results demonstrate the correct operation of the proposed topology.
2021 12TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE (PEDSTC)
(2021)
Proceedings Paper
Energy & Fuels
Amir Malek, Ali Yazdian Varjani
Summary: A novel bidirectional dc-dc converter with a modified interleaved buck-boost circuit and a neutral-point-clamped (NPC) structure is proposed in this paper, which achieves higher voltage conversion ratio, reduced switch voltage stress, and decreased input current ripple. The converter features zero-voltage switching (ZVS) characteristic and PWM plus phase-shift (PPS) modulation method for optimal performance. Simulation results for voltage range of 40-50 V to 400 V at rated power are presented.
2021 12TH POWER ELECTRONICS, DRIVE SYSTEMS, AND TECHNOLOGIES CONFERENCE (PEDSTC)
(2021)
