Outputs (64)

The Influence of the Number of Frequencies and the Frequency Repetitions Rates in Spread Spectrum Sigma-Delta Modulated DC-DC Converters (2021)
Presentation / Conference Contribution
Pena-Quintal, A., Niewiadomski, K., Greedy, S., Sumner, M., & Thomas, D. (2021, September). The Influence of the Number of Frequencies and the Frequency Repetitions Rates in Spread Spectrum Sigma-Delta Modulated DC-DC Converters. Presented at 2021 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), Nusa Dua - Bali, Indonesia

This paper explores the impact of using a Spread Spectrum modulation technique based on a Sigma-Delta modulator for a DC-DC SiC-based power converter. A simple block is proposed for the PWM to generate square pulses close to 20 kHz with a controlled... Read More about The Influence of the Number of Frequencies and the Frequency Repetitions Rates in Spread Spectrum Sigma-Delta Modulated DC-DC Converters.

Limitations in Applying the Existing LISN Topologies for Low Frequency Conducted Emission Measurements and Possible Solution (2021)
Presentation / Conference Contribution
Wan, L., Khilnani, A., Hamid, A., Grassi, F., Spadacini, G., Pignari, S., Sumner, M., & Thomas, D. (2021, September). Limitations in Applying the Existing LISN Topologies for Low Frequency Conducted Emission Measurements and Possible Solution. Presented at 2021 Asia-Pacific International Symposium on Electromagnetic Compatibility (APEMC), Nusa Dua - Bali, Indonesia and online

The use of power electronic converters to interface renewable sources and intelligent loads to electricity distribution systems is increasing at a rapid rate as they bring flexibility and control to the system. However, they also bring an increased l... Read More about Limitations in Applying the Existing LISN Topologies for Low Frequency Conducted Emission Measurements and Possible Solution.

A compensated impedance based ground fault locator for an unearthed power system (2021)
Presentation / Conference Contribution
Jahanger, H. K., Raqib, A., Thomas, D. W., & Sumner, M. (2020, December). A compensated impedance based ground fault locator for an unearthed power system. Presented at 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), Online Conference

Continuous operation of a power system during a ground fault can be achieved by employing either a High Resistance Grounded (HRG) power source or a floating power source. However, if a second ground fault occurs in the system it can cause significant... Read More about A compensated impedance based ground fault locator for an unearthed power system.

Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor (2021)
Presentation / Conference Contribution
Raqib, A., Jahanger, H., Sumner, M., Cox, T., Klumpner, C., Agha, I., Kenney, R., Aguilar, F., & Lonsdale, P. (2020, December). Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor. Presented at 10th International Conference on Power Electronics, Machines and Drives (PEMD 2020), Online Conference

Electrolytic capacitors continue to be used for the DC-link in motor drive systems due to their high specific capacitance. The degradation of electrolytic capacitors can lead to increased equivalent series resistances (ESR) and reduction in capacitan... Read More about Comparison of Frequency Transform Methods for Condition Monitoring of a DC-Link Capacitor.

Distributed Predictive Secondary Control for Imbalance Sharing in AC Microgrids (2021)
Journal Article
Navas-Fonseca, A., Burgos-Mellado, C., Gomez, J. S., Donoso, F., Tarisciotti, L., Saez, D., Cardenas, R., & Sumner, M. (2022). Distributed Predictive Secondary Control for Imbalance Sharing in AC Microgrids. IEEE Transactions on Smart Grid, 13(1), 20-37. https://doi.org/10.1109/TSG.2021.3108677

This paper proposes a distributed predictive secondary control strategy to share imbalance in three-phase, three-wire isolated AC Microgrids. The control is based on a novel approach where the imbalance sharing among distributed generators is control... Read More about Distributed Predictive Secondary Control for Imbalance Sharing in AC Microgrids.

Distributed Predictive Control Strategy for Frequency Restoration of Microgrids Considering Optimal Dispatch (2021)
Journal Article
F., A. N., Gomez, J. S., Llanos, J., Rute, E., Saez, D., & Sumner, M. (2021). Distributed Predictive Control Strategy for Frequency Restoration of Microgrids Considering Optimal Dispatch. IEEE Transactions on Smart Grid, 12(4), 2748-2759. https://doi.org/10.1109/tsg.2021.3053092

Microgrids are the cornerstone for a new model of electrical generation based on renewable resources. Commonly microgrids are controlled with a centralised hierarchical structure, which is inherited from power systems. However, a time-scale separatio... Read More about Distributed Predictive Control Strategy for Frequency Restoration of Microgrids Considering Optimal Dispatch.

Distributed Predictive Secondary Control for Voltage Restoration and Economic Dispatch of Generation for DC Microgrids (2021)
Presentation / Conference Contribution
Navas-Fonseca, A., Burgos-Mellado, C., Espina, E., Rute, E., Gomez, J. S., Saez, D., & Sumner, M. (2021, July). Distributed Predictive Secondary Control for Voltage Restoration and Economic Dispatch of Generation for DC Microgrids. Presented at 2021 IEEE Fourth International Conference on DC Microgrids (ICDCM), Arlington, VA, USA

DC microgrids ease the integration of renewables and can be easily put together with plug-and-play operation. However, most control techniques in DC microgrids focus on voltage regulation without considering its economical operation. Furthermore, the... Read More about Distributed Predictive Secondary Control for Voltage Restoration and Economic Dispatch of Generation for DC Microgrids.

Sensorless Speed Control of a Fault-Tolerant Five-Phase PMSM Drives (2020)
Journal Article
Saleh, K., & Sumner, M. (2020). Sensorless Speed Control of a Fault-Tolerant Five-Phase PMSM Drives. Electric Power Components and Systems, 48(9-10), 919-932. https://doi.org/10.1080/15325008.2020.1825555

This paper introduces a novel method to achieve sensorless speed control of a Five-phase Permanent Magnet Synchronous Motor (PMSM) drive in case of a single-phase open-circuit fault regardless which phase is open. The motor performance when an open c... Read More about Sensorless Speed Control of a Fault-Tolerant Five-Phase PMSM Drives.

Time-domain Assessment of Data Transmission Errors in Systems with Multiple DC/DC Converters (2020)
Presentation / Conference Contribution
Niewiadomski, K., Lezynski, P., Smolenski, R., Bojarski, J., Sumner, M., & Thomas, D. W. P. (2020, September). Time-domain Assessment of Data Transmission Errors in Systems with Multiple DC/DC Converters. Presented at 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, Rome, Italy

In this paper a statistical approach to quantify time-domain impact of common mode (CM) voltage induced on a communication system by the operation of several DC/DC converters is presented. The mathematical formulation of a problem of conducted electr... Read More about Time-domain Assessment of Data Transmission Errors in Systems with Multiple DC/DC Converters.

An Open Source, FPGA-Based Bit Error Ratio Tester for Serial Communications (2020)
Presentation / Conference Contribution
Basford, M. J., Pena-Quintal, A. E., Greedy, S., Sumner, M., & Thomas, D. W. P. (2020, September). An Open Source, FPGA-Based Bit Error Ratio Tester for Serial Communications. Presented at 2020 International Symposium on Electromagnetic Compatibility - EMC EUROPE, Rome, Italy

This paper discusses the design of a FPGA-based Bit Error Ratio (BER) measurement system in a serial communication link under electromagnetic emissions. The BER measurement is an important figure for the reliability of digital communication systems.... Read More about An Open Source, FPGA-Based Bit Error Ratio Tester for Serial Communications.