All Outputs (82)

Cyber-attacks in modular multilevel converters (2022)
Journal Article
Burgos-Mellado, C., Donoso, F., Dragicevic, T., Cardenas-Dobson, R., Wheeler, P., Clare, J. C., & Watson, A. J. (2022). Cyber-attacks in modular multilevel converters. IEEE Transactions on Power Electronics, 37(7), 8488-8501. https://doi.org/10.1109/TPEL.2022.3147466

Distributed control of modular multilevel converter (MMC) submodules offers several potential benefits such as flexibility and modularity. In this approach, low-level control tasks, such as capacitor voltage balancing, can be distributed amongst cont... Read More about Cyber-attacks in modular multilevel converters.

FEA Based Transformer Loss Analysis for Dual Active Bridge DC-DC Converter using Triple Phase Shift Modulation (2022)
Journal Article
Akbar, S. M., Hasan, A., Watson, A. J., & Wheeler, P. (2022). FEA Based Transformer Loss Analysis for Dual Active Bridge DC-DC Converter using Triple Phase Shift Modulation. IEEE Journal of Emerging and Selected Topics in Power Electronics, 10(4), 4347-4360. https://doi.org/10.1109/JESTPE.2022.3148355

High frequency transformers are a key component of dual active bridge (DAB) dc-dc converters, providing isolation and voltage scaling. The losses in the transformer should be minimized to improve efficiency and extend lifetime. The existing research... Read More about FEA Based Transformer Loss Analysis for Dual Active Bridge DC-DC Converter using Triple Phase Shift Modulation.

Continuous Set Model Predictive Control for Energy Management of Modular Multilevel Matrix Converters (2021)
Journal Article
Urrutia, M., Cardenas-Dobson, R., Clare, J. C., Diaz, M., & Watson, A. J. (2022). Continuous Set Model Predictive Control for Energy Management of Modular Multilevel Matrix Converters. IEEE Transactions on Power Electronics, 37, 5731-5748. https://doi.org/10.1109/TPEL.2021.3133695

The Modular Multilevel Matrix Converter is an AC-AC power converter proposed for high power applications such as motor drive and wind energy conversion systems. The M 3C has 9 clusters, allowing 4 circulating currents for converter energy management.... Read More about Continuous Set Model Predictive Control for Energy Management of Modular Multilevel Matrix Converters.

Trapezoidal operation of modular multilevel DC-DC converter for HVDC interconnections (2021)
Presentation / Conference Contribution
Saleh, B. M., Donoso Merlet, F., Costabeber, A., Watson, A. J., & Clare, J. C. (2021, October). Trapezoidal operation of modular multilevel DC-DC converter for HVDC interconnections. Presented at IECON 2021 – 47th Annual Conference of the IEEE Industrial Electronics Society, Toronto, Ontario, Canada

High Voltage Direct Current (HVDC) grids are becoming a preferred option for the expansion of the traditional electrical networks as a result of their potential economic, technical and environmental benefits. Developing HVDC grids includes the linkin... Read More about Trapezoidal operation of modular multilevel DC-DC converter for HVDC interconnections.

A Push-Pull Series Connected Modular Multilevel Converter for HVDC Applications (2021)
Journal Article
Kaya, M., Costabeber, A., Watson, A. J., Tardelli, F., & Clare, J. C. (2022). A Push-Pull Series Connected Modular Multilevel Converter for HVDC Applications. IEEE Transactions on Power Electronics, 37(3), 3111 - 3129. https://doi.org/10.1109/TPEL.2021.3115338

This article introduces a push-pull series connected (PPSC) ac-dc converter intended for high voltage direct current (HVDC) applications. The proposed topology requires fewer submodules compared to a standard modular multilevel converter (MMC) to wit... Read More about A Push-Pull Series Connected Modular Multilevel Converter for HVDC Applications.

Current Control of LCL-Type Shunt APFs: Damping Characteristics, Stability Analysis, and Robust Design against Grid Impedance Variation (2021)
Journal Article
Yang, L., Yang, J., Gao, M., Watson, A., & Wheeler, P. (2021). Current Control of LCL-Type Shunt APFs: Damping Characteristics, Stability Analysis, and Robust Design against Grid Impedance Variation. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(4), 5026-5042. https://doi.org/10.1109/JESTPE.2020.3017551

This article is focused on a dual-loop current control (grid current loop and inverter-side current loop) with the point of common coupling (PCC) voltage feedforward control for digitally controlled LCL-type shunt active power filters (APFs). However... Read More about Current Control of LCL-Type Shunt APFs: Damping Characteristics, Stability Analysis, and Robust Design against Grid Impedance Variation.

Model Predictive Control with Triple Phase Shift Modulation for a Dual Active Bridge DC-DC Converter (2021)
Journal Article
Akbar, S. M., Hasan, A., Watson, A. J., & Wheeler, P. (2021). Model Predictive Control with Triple Phase Shift Modulation for a Dual Active Bridge DC-DC Converter. IEEE Access, 9, 98603-98614. https://doi.org/10.1109/ACCESS.2021.3095553

A fast dynamic response is one of the key demands for the dual active bridge (DAB) dc-dc converter to achieve a well-regulated output voltage over a wide range of operating conditions. Recently, model predictive control (MPC) has become a promising a... Read More about Model Predictive Control with Triple Phase Shift Modulation for a Dual Active Bridge DC-DC Converter.

Optimal ZCS Modulation for BidirectionalHigh-Step-Ratio Modular Multilevel dc-dc Converter (2021)
Journal Article
Pineda, C., Pereda, J., Rojas, F., Droguett, G., Burgos-Mellado, C., & Watson, A. J. (2021). Optimal ZCS Modulation for BidirectionalHigh-Step-Ratio Modular Multilevel dc-dc Converter. IEEE Transactions on Power Electronics, 36(11), 12540 - 12550. https://doi.org/10.1109/TPEL.2021.3078235

Recent developments in dc powered technologies have increased interest in highly efficient dc-dc converters, especially at high voltage and high-step voltage ratios. Modular multilevel converters (MMCs) are an attractive alternative approach to this... Read More about Optimal ZCS Modulation for BidirectionalHigh-Step-Ratio Modular Multilevel dc-dc Converter.

Circulating Current Control for the Modular Multilevel Matrix Converter Based on Model Predictive Control (2021)
Journal Article
Urrutia, M., Cardenas, R., Clare, J. C., & Watson, A. (2021). Circulating Current Control for the Modular Multilevel Matrix Converter Based on Model Predictive Control. IEEE Journal of Emerging and Selected Topics in Power Electronics, 9(5), 6069-6085. https://doi.org/10.1109/jestpe.2021.3071964

In this work, a Continuous-Control-Set Model Predictive Control (CCS-MPC) strategy, with a saturation scheme for protection, is presented for regulating the circulating currents of a Modular Multilevel Matrix Converter (M3C). The proposed scheme is b... Read More about Circulating Current Control for the Modular Multilevel Matrix Converter Based on Model Predictive Control.

A hybrid chain-link push-pull series connected (H-CL-P2SC) M2C with DC fault blocking capability (2021)
Presentation / Conference Contribution
Kaya, M., Costabeber, A., Watson, A. J., Tardelli, F., & Clare, J. C. (2020, December). A hybrid chain-link push-pull series connected (H-CL-P2SC) M2C with DC fault blocking capability. Presented at 9th IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES 2020), Jaipur, India

This paper introduces a hybrid chain-link push-pull series connected (H-CL-P2SC) modular multilevel converter for HVDC applications, especially for those considering a connection of off-shore wind farms to the grid. On the ac side, each converter pha... Read More about A hybrid chain-link push-pull series connected (H-CL-P2SC) M2C with DC fault blocking capability.

Experimental Validation of a Nested Control System to Balance the Cell Capacitor Voltages in Hybrid MMCs (2021)
Journal Article
Donoso, F., Cardenas, R., Espinoza, M., Clare, J., Mora, A., & Watson, A. (2021). Experimental Validation of a Nested Control System to Balance the Cell Capacitor Voltages in Hybrid MMCs. IEEE Access, 9, 21965-21985. https://doi.org/10.1109/ACCESS.2021.3054340

© 2013 IEEE. In a hybrid modular multilevel converter (MMC), capacitor voltage balance between the Full-Bridge Sub-Modules (FBSMs) and Half-Bridge Sub-Modules (HBSMs) is only possible when the arm currents are bipolar. For a grid-connected MMC, opera... Read More about Experimental Validation of a Nested Control System to Balance the Cell Capacitor Voltages in Hybrid MMCs.

Distributed Control Strategy Based on a Consensus Algorithm for the Inter-cell and Inter-cluster Voltage Balancing of a Cascaded H-Bridge Based STATCOM (2020)
Presentation / Conference Contribution
Burgos-Mellado, C., Gutierrez, J., Pineda, C., Donoso, F., Watson, A., Sumner, M., Cardenas, R., & Mora, A. (2020, November). Distributed Control Strategy Based on a Consensus Algorithm for the Inter-cell and Inter-cluster Voltage Balancing of a Cascaded H-Bridge Based STATCOM. Presented at 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), Aalborg, Denmark

© 2020 IEEE. Cascaded H-bridge converters are widely used in the implementation of medium voltage static synchronous compensators (STATCOMs). This is because of the advantages of relatively high-power density and the improved utilisation of low-volta... Read More about Distributed Control Strategy Based on a Consensus Algorithm for the Inter-cell and Inter-cluster Voltage Balancing of a Cascaded H-Bridge Based STATCOM.

Zero-Current Switching (ZCS) for a High Step Ratio Modular Multilevel dc-dc Converter with wide voltage range operation (2020)
Presentation / Conference Contribution
Pineda, C., Pereda, J., Burgos-Mellado, C., Watson, A., & Rojas, F. (2020, November). Zero-Current Switching (ZCS) for a High Step Ratio Modular Multilevel dc-dc Converter with wide voltage range operation. Presented at 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), Aalborg, Denmark

© 2020 IEEE. The rise of new dc technologies is pushing the development of highly efficient dc-dc converters, especially at high voltage and high step ratio. Modular multilevel converters (MMCs) are an attractive alternative because they can manage m... Read More about Zero-Current Switching (ZCS) for a High Step Ratio Modular Multilevel dc-dc Converter with wide voltage range operation.

A Series Chain-Link Modular Multilevel DC-DC Converter For High Voltage and High Power Applications (2020)
Presentation / Conference Contribution
Saleh, B. M., Costabeber, A., Watson, A. J., & Clare, J. C. (2020, November). A Series Chain-Link Modular Multilevel DC-DC Converter For High Voltage and High Power Applications. Presented at 2020 IEEE 21st Workshop on Control and Modeling for Power Electronics (COMPEL), Aalborg, Denmark

© 2020 IEEE. In high voltage and high-power applications, many modular multilevel DC-DC converter topologies have been proposed for DC voltage scaling applications. In most of those proposed a three phase transformer is required. The construction of... Read More about A Series Chain-Link Modular Multilevel DC-DC Converter For High Voltage and High Power Applications.

Finite Control Set Model Predictive Control of Isolated DC/DC Modular Multilevel Converter (2020)
Presentation / Conference Contribution
Akbar, S. M., Hasan, A., Watson, A., Wheeler, P., & Odhano, S. (2020, October). Finite Control Set Model Predictive Control of Isolated DC/DC Modular Multilevel Converter. Presented at IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society, Singapore, Singapore

© 2020 IEEE. Isolated DC/DC modular multilevel converters (MMC) consisting of two MMCs isolated by a transformer are one of the converter topologies being considered used for DC/DC conversion in HVDC transmission. Two level modulation can be used to... Read More about Finite Control Set Model Predictive Control of Isolated DC/DC Modular Multilevel Converter.

Single-phase consensus-based control for regulating voltage and sharing unbalanced currents in 3-wire isolated AC microgrids (2020)
Journal Article
Burgos-Mellado, C., Llanos, J., Espina, E., Saez, D., Cardenas, R., Sumner, M., & Watson, A. (2020). Single-phase consensus-based control for regulating voltage and sharing unbalanced currents in 3-wire isolated AC microgrids. IEEE Access, 8, 164882-164898. https://doi.org/10.1109/ACCESS.2020.3022488

A distributed control strategy is proposed to share unbalanced currents in three-phase threewire isolated AC Microgrids (MGs). It is based on a novel approach where, rather than analysing the MG as a three-phase system, it is analysed as three single... Read More about Single-phase consensus-based control for regulating voltage and sharing unbalanced currents in 3-wire isolated AC microgrids.

Three-Level Indirect Matrix Converter With Series Z-source Networks (2020)
Presentation / Conference Contribution
Effah, F. B., Wheeler, P., Okyere, P., Watson, A., Ojo, J., & Clare, J. (2020, August). Three-Level Indirect Matrix Converter With Series Z-source Networks. Presented at 2020 IEEE PES/IAS PowerAfrica, Nairobi, Kenya (online)

The concept of series Z-source network has been extended to a conventional indirect matrix converter in previous publications for raising the voltage gain to unity and beyond. In this paper, this idea is adapted and applied to a three-level indirect... Read More about Three-Level Indirect Matrix Converter With Series Z-source Networks.

4D BIM integrated construction supply chain logistics to optimise on-site production (2020)
Journal Article
Magill, L. J., Jafarifar, N., Watson, A., & Omotayo, T. (2022). 4D BIM integrated construction supply chain logistics to optimise on-site production. International Journal of Construction Management, 22(12), 2325-2334. https://doi.org/10.1080/15623599.2020.1786623

Loss of productivity through on-site delays and disruptions is a significant problem in the construction industry. This can be caused by workforce, materials, and equipment clashes. A major need for the industry is to improve construction logistic ef... Read More about 4D BIM integrated construction supply chain logistics to optimise on-site production.

Optimized space-vector-modulated quasi Z-source NPC inverter for solar PV application (2019)
Journal Article
Effah, F. B., Okyere, P. Y., Wheeler, P., Watson, A., & Clare, J. (2019). Optimized space-vector-modulated quasi Z-source NPC inverter for solar PV application. Carpathian Journal of Electrical Engineering, 13(1), 17-29

An optimized space vector modulation technique for controlling a quasi Z-source NPC inverter for solar photovoltaic application is presented in this paper. The presented algorithm optimizes the number of switching transitions over a switching cycle b... Read More about Optimized space-vector-modulated quasi Z-source NPC inverter for solar PV application.

THREE-LEVEL INDIRECT MATRIX CONVERTER WITH TWO SERIES Z-SOURCE NETWORKS. (2019)
Journal Article
Boafo Effah, F., Okyere, P., Sani Ellis, M., Wheeler, P., Watson, A., Clare, J., & Ojo, J. (2019). THREE-LEVEL INDIRECT MATRIX CONVERTER WITH TWO SERIES Z-SOURCE NETWORKS. Carpathian Journal of Electrical Engineering, 13(1), 61-76

In previous articles, the concept of series Z-source network has been extended to conventional indirect matrix converter to raise the voltage gain to unity and beyond. In this paper, this idea is modified and applied to a three-level indirect matrix... Read More about THREE-LEVEL INDIRECT MATRIX CONVERTER WITH TWO SERIES Z-SOURCE NETWORKS..