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Understanding wind turbine power converter reliability under realistic wind conditions (2024)
Journal Article
Alsaadi, S., Crabtree, C. J., Matthews, P. C., & Shahbazi, M. (2024). Understanding wind turbine power converter reliability under realistic wind conditions. IET Power Electronics, https://doi.org/10.1049/pel2.12670

The reliability of wind turbine power converters is crucial for analyzing wind energy project costs, and for estimating maintenance and downtime. The published literature in this field relies on evaluating the reliability effect of wind speed to esti... Read More about Understanding wind turbine power converter reliability under realistic wind conditions.

Steady-State Analysis of Class-E/Fn Inverter with MOSFET Nonlinear Output Capacitance at any Grading Coefficient (2023)
Journal Article
Lotfi, A., Shahbazi, M., Issa, W., Wheeler, P., Sekiya, H., Kazimierczuk, M. K., & Blaabjerg, F. (2023). Steady-State Analysis of Class-E/Fn Inverter with MOSFET Nonlinear Output Capacitance at any Grading Coefficient. IEEE Access, https://doi.org/10.1109/access.2023.3309295

In this paper, the analysis and design of a class-E/F n inverter using analytically expressions is provided for any grading coefficient m of the MOSFET body junction diode at 50% duty ratio. Generally, the class-E zero-voltage switching (ZVS) and zer... Read More about Steady-State Analysis of Class-E/Fn Inverter with MOSFET Nonlinear Output Capacitance at any Grading Coefficient.

A Reliability-Optimized Maximum Power Point Tracking Algorithm Utilizing Neural Networks for Long-Term Lifetime Prediction for Photovoltaic Power Converters (2023)
Journal Article
Shahbazi, M., Smith, N. A., Marzband, M., & Habib, H. U. R. (2023). A Reliability-Optimized Maximum Power Point Tracking Algorithm Utilizing Neural Networks for Long-Term Lifetime Prediction for Photovoltaic Power Converters. Energies, 16(16), Article 6071. https://doi.org/10.3390/en16166071

The reliability of power converters in photovoltaic systems is critical to the overall system reliability. This paper proposes a novel active thermal-controlled algorithm that aims to reduce the rate of junction temperature increase, therefore, incre... Read More about A Reliability-Optimized Maximum Power Point Tracking Algorithm Utilizing Neural Networks for Long-Term Lifetime Prediction for Photovoltaic Power Converters.

Real-time resilient Microgrid power management based on multi-agent systems with price forecast (2022)
Journal Article
Cruz-Victorio, M., Kazemtabrizi, B., & Shahbazi, M. (2023). Real-time resilient Microgrid power management based on multi-agent systems with price forecast. IET Smart Grid, 6(2), 190-204. https://doi.org/10.1049/stg2.12089

Microgrids have emerged to diversify conventional electric generation using small-scale distributed generation. Large efforts have been put into designing control strategies to optimise the power schedules of microgrids, however, verification that su... Read More about Real-time resilient Microgrid power management based on multi-agent systems with price forecast.

A Quasi-Z-Source Four-Switch Three-Phase Inverter with Null Vector Capability (2022)
Journal Article
Haghi, R., Beiranvand, R., & Shahbazi, M. (2023). A Quasi-Z-Source Four-Switch Three-Phase Inverter with Null Vector Capability. IEEE Transactions on Industrial Electronics, 70(6), 5421-5432. https://doi.org/10.1109/tie.2022.3198238

In this paper, a novel structure for a four-switch three-phase inverter with the ability of creating a null vector is proposed. This structure utilizes a symmetrical quasi-Z-source network and generates zero output voltage during the shoot-through st... Read More about A Quasi-Z-Source Four-Switch Three-Phase Inverter with Null Vector Capability.

Enhancing reliability of photovoltaic power electronic converters under dynamic irradiance conditions (2022)
Journal Article
Jacobo Tapia, R., & Shahbazi, M. (2022). Enhancing reliability of photovoltaic power electronic converters under dynamic irradiance conditions. Microelectronics Reliability, 135, Article 114583. https://doi.org/10.1016/j.microrel.2022.114583

This paper presents a novel temperature-controlled maximum power point tracking (MPPT) algorithm for lifetime improvement of a photovoltaic (PV) converter under dynamic irradiance conditions. The proposed algorithm controls and limits the junction te... Read More about Enhancing reliability of photovoltaic power electronic converters under dynamic irradiance conditions.

Statistical Evaluation of Wind Speed Forecast Models for Microgrid Distributed Control (2022)
Journal Article
Cruz Victorio, M. E., Kazemtabrizi, B., & Shahbazi, M. (2022). Statistical Evaluation of Wind Speed Forecast Models for Microgrid Distributed Control. IET Smart Grid, 5(5), 347-362. https://doi.org/10.1049/stg2.12073

With the increasing needs to decarbonise existing energy systems, there is an effort to integrate small-scale distributed generation sources, such as wind generators, with the electric demand in circuits known as microgrids. The operation of distribu... Read More about Statistical Evaluation of Wind Speed Forecast Models for Microgrid Distributed Control.

Price Forecast Methodologies Comparison for Microgrid Control with Multi-Agent Systems (2021)
Conference Proceeding
Cruz Victorio, M., Kazemtabrizi, B., & Shahbazi, M. (2021). Price Forecast Methodologies Comparison for Microgrid Control with Multi-Agent Systems. . https://doi.org/10.1109/powertech46648.2021.9494970

Multi-Agent systems offer a way to control distributed generation in microgrids, reliability and cost minimisation capabilities can be improved by price forecast methodologies that can be deployed without the need of external control signals. This pa... Read More about Price Forecast Methodologies Comparison for Microgrid Control with Multi-Agent Systems.

Universal Branch Model for the Solution of Optimal Power Flows in Hybrid AC/DC Grids (2020)
Journal Article
Alvarez-Bustos, A., Kazemtabrizi, B., Shahbazi, M., & Acha, E. (2021). Universal Branch Model for the Solution of Optimal Power Flows in Hybrid AC/DC Grids. International Journal of Electrical Power & Energy Systems, 126(Part A), Article 106543. https://doi.org/10.1016/j.ijepes.2020.106543

This paper presents a universal model formulation for solving Optimal Power Flows for hybrid AC/DC grids. The prowess of the new formulation is that it (i) provides a direct link between AC and DC parts of the grid allowing for solving the entire net... Read More about Universal Branch Model for the Solution of Optimal Power Flows in Hybrid AC/DC Grids.

Distributed Real-Time Power Management in Microgrids using Multi-agent Control with Provisions of Fault Tolerance (2020)
Conference Proceeding
Cruz Victorio, M., Kazemtabrizi, B., & Shahbazi, M. (2020). Distributed Real-Time Power Management in Microgrids using Multi-agent Control with Provisions of Fault Tolerance. In 2020 IEEE 29th International Symposium on Industrial Electronics (ISIE) : proceedings (108-113). https://doi.org/10.1109/isie45063.2020.9152548

This paper presents a distributed real-time control scheme based on multi-agent systems for cost optimisation of a micro-grid using real-time dynamic price estimation. The real-time prices are forecast using realistic UK energy price data via a Marko... Read More about Distributed Real-Time Power Management in Microgrids using Multi-agent Control with Provisions of Fault Tolerance.

Theoretical and technical potential evaluation of solar power generation in Iran (2019)
Journal Article
Ghasemi, G., Noorollahi, Y., Alavi, H., Marzband, M., & Shahbazi, M. (2019). Theoretical and technical potential evaluation of solar power generation in Iran. Renewable Energy, 138, 1250-1261. https://doi.org/10.1016/j.renene.2019.02.068

Nowadays, utilizing solar energy for power production at high efficiency and in a cost-effective status is a challenging issue for power plant engineers. This challenge would be answered by considering several affecting parameters such as technical,... Read More about Theoretical and technical potential evaluation of solar power generation in Iran.

Decentralised Real-time Optimisation of Power Management in Microgrids Using Multi-Agent Control (2019)
Conference Proceeding
Cruz Victorio, M., Kazemtabrizi, B., & Shahbazi, M. (2019). Decentralised Real-time Optimisation of Power Management in Microgrids Using Multi-Agent Control. In 9th International Conference on Power and Energy Systems (ICPES), Perth, Australia, 2019 (1-6). https://doi.org/10.1109/icpes47639.2019.9105639

microgrid, implementing real-time generation cost minimisation. The MultiAgent control is tested against heuristic optimisation methods. It is shown that the control can reduce costs without the need of a central controller and in times of the order... Read More about Decentralised Real-time Optimisation of Power Management in Microgrids Using Multi-Agent Control.

Fast Detection of Open-Switch Fault in Cascaded H-Bridge Multilevel Converter (2017)
Journal Article
Shahbazi, M., Zolghadri, M., Khodabandeh, M., & Ouni, S. (2018). Fast Detection of Open-Switch Fault in Cascaded H-Bridge Multilevel Converter. Scientia iranica, 25(3), 1561-1570. https://doi.org/10.24200/sci.2017.4371

Cascaded H-Bridge converter has recently been utilized in different high-power applications due to its modular and simple structure. In order to have a balanced operation after a fault occurrence in this converter, it is necessary to detect the switc... Read More about Fast Detection of Open-Switch Fault in Cascaded H-Bridge Multilevel Converter.

Real-time power switch fault diagnosis and fault-tolerant operation in a DFIG-based wind energy system (2017)
Journal Article
Shahbazi, M., Poure, P., & Saadate, S. (2018). Real-time power switch fault diagnosis and fault-tolerant operation in a DFIG-based wind energy system. Renewable Energy, 116, 209-218. https://doi.org/10.1016/j.renene.2017.02.066

As wind energy production increases, reliability and fault-tolerant operation capability of wind energy systems are becoming more important. Modern wind energy production systems use power electronic converters which are unfortunately proved to be on... Read More about Real-time power switch fault diagnosis and fault-tolerant operation in a DFIG-based wind energy system.

Quick Diagnosis of Short Circuit Fault in Cascaded H-Bridge Multilevel Inverter using FPGA (2017)
Journal Article
Ouni, S., Zolghadri, M., Rodriguez, J., Shahbazi, M., Oraee, H., Lezana, P., & Schmeisser, A. (2017). Quick Diagnosis of Short Circuit Fault in Cascaded H-Bridge Multilevel Inverter using FPGA. Journal of power electronics, 17(1), 56-66. https://doi.org/10.6113/jpe.2017.17.1.56

Fast and accurate fault detection is the primary step and one of the most important tasks in fault tolerant converters. In this paper, a fast and simple method is proposed to detect and diagnosis the faulty cell in a cascaded H-bridge multilevel inve... Read More about Quick Diagnosis of Short Circuit Fault in Cascaded H-Bridge Multilevel Inverter using FPGA.

Power Electronic Converters in Microgrid Applications (2016)
Book Chapter
Shahbazi, M., & Khorsandi, A. (2016). Power Electronic Converters in Microgrid Applications. In M. Mahmoud (Ed.), Microgrid: Advanced Control Methods and Renewable Energy System Integration. Elsevier

Improvement of Post-Fault Performance of a Cascaded H-bridge Multilevel Inverter (2016)
Journal Article
Ouni, S., Zolghadri, M., Khodabandeh, M., Shahbazi, M., Rodriguez, J., Oraee, H., …Schmeisser, A. (2017). Improvement of Post-Fault Performance of a Cascaded H-bridge Multilevel Inverter. IEEE Transactions on Industrial Electronics, 64(4), 2779-2788. https://doi.org/10.1109/tie.2016.2632058

This paper is focused on improving the post-fault performance of Cascaded H-bridge Multilevel Inverters by decreasing the common mode voltage. First, an algorithm is proposed to determine the optimal post-fault state among all possible states which h... Read More about Improvement of Post-Fault Performance of a Cascaded H-bridge Multilevel Inverter.

Open-circuit switch fault tolerant wind energy conversion system based on six/five-leg reconfigurable converter (2016)
Journal Article
Shahbazi, M., Saadate, S., Poure, P., & Zolghadri, M. (2016). Open-circuit switch fault tolerant wind energy conversion system based on six/five-leg reconfigurable converter. Electric Power Systems Research, 137, 104-112. https://doi.org/10.1016/j.epsr.2016.04.004

In this paper, an FPGA-controlled fault tolerant back-to-back converter for DFIG-based wind energy conversion application is studied. Before an open-circuit failure in one of the semiconductors, the fault tolerant converter operates as a conventional... Read More about Open-circuit switch fault tolerant wind energy conversion system based on six/five-leg reconfigurable converter.

T-Type Direct AC/AC Converter Structure (2016)
Journal Article
Khodabandeh, M., Zolghadri, M., Shahbazi, M., & Noroozi, N. (2016). T-Type Direct AC/AC Converter Structure. IET Power Electronics, 9(7), 1426-1436. https://doi.org/10.1049/iet-pel.2015.0151

In this study, a novel T-type topology for single-phase direct AC/AC conversion is proposed. In this topology, frequency changing takes place directly (without common DC voltage bus) through three converters that are connected in a T structure. Unity... Read More about T-Type Direct AC/AC Converter Structure.

Open- and Short-Circuit Switch Fault Diagnosis for Nonisolated DC–DC Converters Using Field Programmable Gate Array (2013)
Journal Article
Shahbazi, M., Jamshidpour, E., Poure, P., Saadate, S., & Zolghadri, M. (2013). Open- and Short-Circuit Switch Fault Diagnosis for Nonisolated DC–DC Converters Using Field Programmable Gate Array. IEEE Transactions on Industrial Electronics, 60(9), 4136-4146. https://doi.org/10.1109/tie.2012.2224078

Fault detection (FD) in power electronic converters is necessary in embedded and safety critical applications to prevent further damage. Fast FD is a mandatory step in order to make a suitable response to a fault in one of the semiconductor devices.... Read More about Open- and Short-Circuit Switch Fault Diagnosis for Nonisolated DC–DC Converters Using Field Programmable Gate Array.

FPGA-Based Reconfigurable Control for Fault-Tolerant Back-to-Back Converter Without Redundancy (2013)
Journal Article
Shahbazi, M., Poure, P., Saadate, S., & Zolghadri, M. (2013). FPGA-Based Reconfigurable Control for Fault-Tolerant Back-to-Back Converter Without Redundancy. IEEE Transactions on Industrial Electronics, 60(8), 3360-3371. https://doi.org/10.1109/tie.2012.2200214

In this paper, an FPGA-based fault-tolerant back-to-back converter without redundancy is studied. Before fault occurrence, the fault-tolerant converter operates like a conventional back-to-back six-leg converter, and after the fault, it becomes a fiv... Read More about FPGA-Based Reconfigurable Control for Fault-Tolerant Back-to-Back Converter Without Redundancy.

FPGA-based fast detection with reduced sensor count for a fault-tolerant three-phase converter (2012)
Journal Article
Shahbazi, M., Poure, P., Saadate, S., & Zolghadri, M. (2013). FPGA-based fast detection with reduced sensor count for a fault-tolerant three-phase converter. IEEE Transactions on Industrial Informatics, 9(3), 1343-1350. https://doi.org/10.1109/tii.2012.2209665

Fast fault detection (FD) and reconfiguration is necessary for fault tolerant power electronic converters in safety critical applications to prevent further damage and to make the continuity of service possible. The aim of this study is to minimize t... Read More about FPGA-based fast detection with reduced sensor count for a fault-tolerant three-phase converter.

Fault-Tolerant Five-Leg Converter Topology With FPGA-Based Reconfigurable Control (2012)
Journal Article
Shahbazi, M., Poure, P., Saadate, S., & Zolghadri, M. (2013). Fault-Tolerant Five-Leg Converter Topology With FPGA-Based Reconfigurable Control. IEEE Transactions on Industrial Electronics, 60(6), 2284-2294. https://doi.org/10.1109/tie.2012.2191754

Fast fault detection and reconfiguration of power converters is necessary in electrical drives to prevent further damage and to make the continuity of service possible. On the other hand, component minimized converters may provide the benefits of hig... Read More about Fault-Tolerant Five-Leg Converter Topology With FPGA-Based Reconfigurable Control.

Five-leg converter topology for wind energy conversion system with doubly fed induction generator (2011)
Journal Article
Shahbazi, M., Poure, P., Saadate, S., & Zolghadri, M. (2011). Five-leg converter topology for wind energy conversion system with doubly fed induction generator. Renewable Energy, 36(11), 3187-3194. https://doi.org/10.1016/j.renene.2011.03.014

In this paper, application of a five-leg converter in Doubly Fed Induction Generator (DFIG) for Wind Energy Conversion Systems (WECS) is investigated. The five-leg structure and its PWM control are studied and performances are compared with the class... Read More about Five-leg converter topology for wind energy conversion system with doubly fed induction generator.