EPE Association: EPE 2020 - DS1d-2: Converter Modelling and Control-2

EPE 2020 - DS1d-2: Converter Modelling and Control-2
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 02: Power Converter Topologies and Design > EPE 2020 - DS1d-2: Converter Modelling and Control-2

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   A Loss-Compensated Control Scheme for SiC-Based Dual Active Bridge Converter
By Ishan PENDHARKAR [View]
[Download]

Abstract: In this paper, a control strategy improvement for controlling Dual Active Bridge (DAB) converters withPhase Control Modulation (PCM) is proposed. The analysis of PCM currently available in literatureneglects the effects of the components' resistive losses, as well as the resistance of the transformerwindings, for determining the required phase shift f between the primary side and secondary side bridges.The analytical method of the PCM is extended with simple algebraic relationships for the required phaseshift f for the needed output power. The effects of including the resistive losses from the componentsis presented not only for the required control angle, but also for the zero voltage switching region of thesemiconductors. A study case of a Dual-Active-Bridge converter in a 22 kW on-board charger applicationis given to demonstrate the procedure of the method.

   Development and Implementation of a Low-Cost Research Platform for Control Applications for Inverter-Based Generators
By Jesus David VASQUEZ PLAZA [View]
[Download]

Abstract: This document presents the develop and implementation of a low-cost research platform based on a microcontroller. The platform was validated through implementation of a resonant controller in aß- frame for Inverter-Based Generators. Also, this work proposes a comparative analysis between a dSPACE 1006 and the embedded systems for control applications in inverter-based generators (IBGs). For the development of the research platform, a microcontroller from the Texas Instruments TMS320F28379D C2000 line was used. Our analysis revealed that control behavior for IBG applications through a low-cost platform based on a microcontroller is similar to that of a dSPACE.

   High Dynamic Power Balancing for Dual Two-Level Inverterduring High-Speed Machine Operation
By Johannes BUEDEL [View]
[Download]

Abstract: This paper aims to present optimized square-wave modulation strategies for the dual two-level inverter, fed by two separate and galvanically isolated energy sources, to balance and control the energy distribution of both inverter systems. Especially for high-speed operation, the methods keep the machine in the required state while decreasing the switching operations to a minimum. Method one aims to compensate voltage fluctuations of variable DC-link voltages, while the second method ensures a symmetrical power distribution for the two inverter systems. In addition, both methods offer the possibility of adapting the amplitude of the usually fixed fundamental load voltage during square-wave modulation.

   Investigation of Harmonics Content in PWM Natural and Regular Sampling including Dead Time and Load Current Phase
By Tonny RASMUSSEN [View]
[Download]

Abstract: Modern wind power plants typically comprise of type IV wind turbines and therefore switched power converters form an integral part of these plants. These converters produce harmonics in output voltage and currents, which can trigger electrical resonances formed by cable capacitances and transformer inductances. Lower frequencies above the fundamental (referred to as baseband) have a high quality factor, Q, thus these frequencies are poorly damped. It is therefore essential to know the harmonic spectrum of the converter. This paper investigates harmonics generated due to widely used non-symmetrical regular sampling, taking into consideration the effect of dead time (when switching the semiconductors) and the phase of the output current relative to the fundamental voltage reference. The investigation has been performed in theory, through simulations and laboratory measurements. A detailed discussion of the results obtained through the three methods has been provided. New contributions in this paper are the investigation of harmonic amplitude and phase due to the phase of the load current together with coupling of both baseband and sideband harmonics.

   Model Predictive Control for Three-Phase Split-Source Inverter
By Naser ABDEL-RAHIM [View]
[Download]

Abstract: This paper proposes a new topology of three-phase split-source inverter (SSI) with only one auxiliary power electronic switch inserted into the three-phase full-bridge inverter. Split-source inverter is a single stage topology, which combines the boosting stage with the DC/AC converter stage. The proposed three-phase SSI has fewer passive components than impedance source converters (like ZSI). Switching states of the conventional three-phase VSI can be used with the SSI to control the output voltage. An independent control for both DC link voltage and output AC voltage is achieved using model predictive control. The DC link voltage can be controlled via duty cycle obtained by a maximum power point tracker or by fixed duty cycle as used in this paper. Simulation results show that the proposed control achieves low THD of the AC output voltage (good performance) with both normal loading condition and sudden load change condition.

   Power Flow Control using a Bidirectional Z-source Inverter-based Static Synchronous Series Compensator
By Xuejiao PAN [View]
[Download]

Abstract: The Static Synchronous Series Compensator, performing power control and reactive power compensation, is an important aid to stable and flexible operation of recent electrical power distribution networks. The paper describes a compensator based on a bidirectional Z-source inverter with PWM technology. This inverter has a wide control range and does not require a switching dead time. Its design using small signal theory to obtain suitable L-C network parameters for desired time response is described. Model predictive current control and direct current control schemes are analysed and compared, and satisfactory performance of the whole compensator is demonstrated.

EPE 2020 - DS1d-2: Converter Modelling and Control-2
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 02: Power Converter Topologies and Design > EPE 2020 - DS1d-2: Converter Modelling and Control-2
	[return to parent folder]

	A Loss-Compensated Control Scheme for SiC-Based Dual Active Bridge Converter By Ishan PENDHARKAR	[View] [Download]
Abstract: In this paper, a control strategy improvement for controlling Dual Active Bridge (DAB) converters withPhase Control Modulation (PCM) is proposed. The analysis of PCM currently available in literatureneglects the effects of the components' resistive losses, as well as the resistance of the transformerwindings, for determining the required phase shift f between the primary side and secondary side bridges.The analytical method of the PCM is extended with simple algebraic relationships for the required phaseshift f for the needed output power. The effects of including the resistive losses from the componentsis presented not only for the required control angle, but also for the zero voltage switching region of thesemiconductors. A study case of a Dual-Active-Bridge converter in a 22 kW on-board charger applicationis given to demonstrate the procedure of the method.

	Development and Implementation of a Low-Cost Research Platform for Control Applications for Inverter-Based Generators By Jesus David VASQUEZ PLAZA	[View] [Download]
Abstract: This document presents the develop and implementation of a low-cost research platform based on a microcontroller. The platform was validated through implementation of a resonant controller in aß- frame for Inverter-Based Generators. Also, this work proposes a comparative analysis between a dSPACE 1006 and the embedded systems for control applications in inverter-based generators (IBGs). For the development of the research platform, a microcontroller from the Texas Instruments TMS320F28379D C2000 line was used. Our analysis revealed that control behavior for IBG applications through a low-cost platform based on a microcontroller is similar to that of a dSPACE.

	High Dynamic Power Balancing for Dual Two-Level Inverterduring High-Speed Machine Operation By Johannes BUEDEL	[View] [Download]
Abstract: This paper aims to present optimized square-wave modulation strategies for the dual two-level inverter, fed by two separate and galvanically isolated energy sources, to balance and control the energy distribution of both inverter systems. Especially for high-speed operation, the methods keep the machine in the required state while decreasing the switching operations to a minimum. Method one aims to compensate voltage fluctuations of variable DC-link voltages, while the second method ensures a symmetrical power distribution for the two inverter systems. In addition, both methods offer the possibility of adapting the amplitude of the usually fixed fundamental load voltage during square-wave modulation.

	Investigation of Harmonics Content in PWM Natural and Regular Sampling including Dead Time and Load Current Phase By Tonny RASMUSSEN	[View] [Download]
Abstract: Modern wind power plants typically comprise of type IV wind turbines and therefore switched power converters form an integral part of these plants. These converters produce harmonics in output voltage and currents, which can trigger electrical resonances formed by cable capacitances and transformer inductances. Lower frequencies above the fundamental (referred to as baseband) have a high quality factor, Q, thus these frequencies are poorly damped. It is therefore essential to know the harmonic spectrum of the converter. This paper investigates harmonics generated due to widely used non-symmetrical regular sampling, taking into consideration the effect of dead time (when switching the semiconductors) and the phase of the output current relative to the fundamental voltage reference. The investigation has been performed in theory, through simulations and laboratory measurements. A detailed discussion of the results obtained through the three methods has been provided. New contributions in this paper are the investigation of harmonic amplitude and phase due to the phase of the load current together with coupling of both baseband and sideband harmonics.

	Model Predictive Control for Three-Phase Split-Source Inverter By Naser ABDEL-RAHIM	[View] [Download]
Abstract: This paper proposes a new topology of three-phase split-source inverter (SSI) with only one auxiliary power electronic switch inserted into the three-phase full-bridge inverter. Split-source inverter is a single stage topology, which combines the boosting stage with the DC/AC converter stage. The proposed three-phase SSI has fewer passive components than impedance source converters (like ZSI). Switching states of the conventional three-phase VSI can be used with the SSI to control the output voltage. An independent control for both DC link voltage and output AC voltage is achieved using model predictive control. The DC link voltage can be controlled via duty cycle obtained by a maximum power point tracker or by fixed duty cycle as used in this paper. Simulation results show that the proposed control achieves low THD of the AC output voltage (good performance) with both normal loading condition and sudden load change condition.

	Power Flow Control using a Bidirectional Z-source Inverter-based Static Synchronous Series Compensator By Xuejiao PAN	[View] [Download]
Abstract: The Static Synchronous Series Compensator, performing power control and reactive power compensation, is an important aid to stable and flexible operation of recent electrical power distribution networks. The paper describes a compensator based on a bidirectional Z-source inverter with PWM technology. This inverter has a wide control range and does not require a switching dead time. Its design using small signal theory to obtain suitable L-C network parameters for desired time response is described. Model predictive current control and direct current control schemes are analysed and compared, and satisfactory performance of the whole compensator is demonstrated.