EPE Association: EPE 2025 - LS5e: Measurement, Supervision and Control for Power Converters

EPE 2025 - LS5e: Measurement, Supervision and Control for Power Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 11: Measurement, Supervision and Control for Power Converters > EPE 2025 - LS5e: Measurement, Supervision and Control for Power Converters

   [return to parent folder]

   Genetic Algorithm-based Control of a Modular On-Board Charger for Electric Vehicle Applications
By Fatemeh NASR ESFAHANI, Mohammadreza PARVIZIMOSAED, Javad EBRAHIMI, Alireza BAKHSHAI, Xiandong MA, Ahmed DARWISH [View]
[Download]

Abstract: This paper presents the operation and control of a modular on-board charger (OBC) for electric vehicle (EV) applications. The modular design enhances fault tolerance, scalability, and thermal management, making it suitable for high-power EV applications. Single-stage isolated Cuk-based converters are used as submodules, supporting bidirectional power flow for enhanced energy efficiency. Additionally, the modular OBC operates efficiently in various modes, including normal driving, regenerative braking, and grid-connected charging, thanks to its integrated structure. A key innovation is the implementation of genetic algorithm (GA)-based controllers, which optimise control parameters to address the right-half-plane (RHP) zero challenges inherent in Cuk converters, thereby improving system stability and dynamic performance. Simulation and experimental results in charging mode demonstrate robust performance, highlighting precise grid current control, effective power factor correction, and stable battery charging under both normal and partial fault conditions.

   Grid Impedance Estimation with Large SCR Disturbances based on Grid-Forming Converter
By Wentao LIU, Anant NARULA, Massimo BONGIORNO, Jan R. SVENSSON [View]
[Download]

Abstract: Grid-Forming (GFM) converters face significant synchronization challenges when suddenly exposed to ultra-weak grid conditions, primarily due to the lack of prior knowledge about grid impedance. This paper proposes a passive method for estimating grid impedance during large disturbances caused by a substantial reduction in the grid short-circuit ratio (SCR). The proposed method relies solely on local measurements, specifically the point of common coupling (PCC) voltage and output power. By dynamically adjusting the active power reference based on these estimates, GFM converters can maintain synchronization even under extremely low SCR conditions, well below 1. This method has been validated through experimental results.

   Magnetic field measurement for contactless current sensing in power electronic converters
By Tien Anh NGUYEN, Pierre-Yves JOUBERT, Laurent DUPONT, Stéphane LEFEBVRE, Denis LABROUSSE, Gérard CHAPLIER, Mickael PETIT, François COSTA [View]
[Download]

Abstract: Current sensing plays an important role in power electronics for both protection and control of power electronic converters. This paper proposes an approach for detecting short-circuit (SC) events through the measurement of the magnetic field radiated by power converters. Two magnetic field sensor technologies (AMR and induction coils) were evaluated. The magnetic field mapping over the PCB is carried out to estimate favorable positions for detecting SC events. The obtained results show that the induction coil is a promising candidate, not only for detecting a SC event but also for performing contactless current measurement in power converters. This work plans to develop the integration of contactless current sensors for power converters, or for intelligent drivers integrating protection against SC event (or over-currents), especially dedicated to wide band gap devices such as GaN and SiC materials which could have lower SC robustness compared to silicon.

EPE 2025 - LS5e: Measurement, Supervision and Control for Power Converters
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2025 - Conference > EPE 2025 - Topic 11: Measurement, Supervision and Control for Power Converters > EPE 2025 - LS5e: Measurement, Supervision and Control for Power Converters
	[return to parent folder]

	Genetic Algorithm-based Control of a Modular On-Board Charger for Electric Vehicle Applications By Fatemeh NASR ESFAHANI, Mohammadreza PARVIZIMOSAED, Javad EBRAHIMI, Alireza BAKHSHAI, Xiandong MA, Ahmed DARWISH	[View] [Download]
Abstract: This paper presents the operation and control of a modular on-board charger (OBC) for electric vehicle (EV) applications. The modular design enhances fault tolerance, scalability, and thermal management, making it suitable for high-power EV applications. Single-stage isolated Cuk-based converters are used as submodules, supporting bidirectional power flow for enhanced energy efficiency. Additionally, the modular OBC operates efficiently in various modes, including normal driving, regenerative braking, and grid-connected charging, thanks to its integrated structure. A key innovation is the implementation of genetic algorithm (GA)-based controllers, which optimise control parameters to address the right-half-plane (RHP) zero challenges inherent in Cuk converters, thereby improving system stability and dynamic performance. Simulation and experimental results in charging mode demonstrate robust performance, highlighting precise grid current control, effective power factor correction, and stable battery charging under both normal and partial fault conditions.

	Grid Impedance Estimation with Large SCR Disturbances based on Grid-Forming Converter By Wentao LIU, Anant NARULA, Massimo BONGIORNO, Jan R. SVENSSON	[View] [Download]
Abstract: Grid-Forming (GFM) converters face significant synchronization challenges when suddenly exposed to ultra-weak grid conditions, primarily due to the lack of prior knowledge about grid impedance. This paper proposes a passive method for estimating grid impedance during large disturbances caused by a substantial reduction in the grid short-circuit ratio (SCR). The proposed method relies solely on local measurements, specifically the point of common coupling (PCC) voltage and output power. By dynamically adjusting the active power reference based on these estimates, GFM converters can maintain synchronization even under extremely low SCR conditions, well below 1. This method has been validated through experimental results.

	Magnetic field measurement for contactless current sensing in power electronic converters By Tien Anh NGUYEN, Pierre-Yves JOUBERT, Laurent DUPONT, Stéphane LEFEBVRE, Denis LABROUSSE, Gérard CHAPLIER, Mickael PETIT, François COSTA	[View] [Download]
Abstract: Current sensing plays an important role in power electronics for both protection and control of power electronic converters. This paper proposes an approach for detecting short-circuit (SC) events through the measurement of the magnetic field radiated by power converters. Two magnetic field sensor technologies (AMR and induction coils) were evaluated. The magnetic field mapping over the PCB is carried out to estimate favorable positions for detecting SC events. The obtained results show that the induction coil is a promising candidate, not only for detecting a SC event but also for performing contactless current measurement in power converters. This work plans to develop the integration of contactless current sensors for power converters, or for intelligent drivers integrating protection against SC event (or over-currents), especially dedicated to wide band gap devices such as GaN and SiC materials which could have lower SC robustness compared to silicon.