EPE Association: EPE 2020 - DS2h: PWM and Control Techniques

EPE 2020 - DS2h: PWM and Control Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 03: Measurement and Control > EPE 2020 - DS2h: PWM and Control Techniques

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   A Full State-Variable Predictive Control of Bi-directional Boost Converters with Guaranteed Stability
By Yu LI [View]
[Download]

Abstract: This work proposes a new direct predictive control with full state-variable for bi-directional DC-DC converters. With the proposed controller, both inductor current and capacitor voltage are incorporated into a unified cost function. The proposed controller allows all state variables to converge to a predefined region resulting in a good steady-state performance. Additionally, the weighting factor matrix based on the Lyapunov theory is analytically designed. Moreover, the steady-state error of the output voltage caused by model mismatch is addressed with a simple integral compensator. To the end, the proposed method is validated on a lab-constructed test bench using experimental results.

   A New ZVS Zone Identification for Dual Active Bridge with a General Modulation Objective
By Suman MAHARANA [View]
[Download]

Abstract: In this work, a performance optimization for dual active bridge is focused with a novel zero-voltage switching-zone identification in instantaneous link current-transmitted power plane with the variation ofinner and outer phase shifts. The proposed solution provides the soft switching zones for all switchesalong with an effective mapping of any general modulation objective like link current optimization.

   Influence of Generalized Discontinuous Pulse Width Modulation (GDPWM) on the DC-link Current and Voltage Ripple in Battery-fed PWM Inverter Systems
By Panagiotis MANTZANAS [View]
[Download]

Abstract: In battery-fed pulse width modulated inverters, the DC-link capacitor represents a limiting factor in terms of power density. The size of the DC-link capacitor strongly depends on its current and voltage ripple. This paper investigates the modulation method "Generalized Discontinuous Pulse Width Modulation" regarding DC-link current and voltage ripple in battery-fed pulse width modulated two-level three-phase voltage source-source inverters. "Generalized Discontinuous Pulse Width Modulation" already proved to be effective in reducing the inverter switching losses. Parameter studies performed in this paper reveal that this modulation method also enables a reduction of the DC-link voltage ripple in comparison to the widely used modulation method "centered space vector modulation".

   Model Predictive Control for the Reduction of DC-link Current Ripple in Two-level Three-phase Voltage Source Inverters
By Junzhong XU [View]
[Download]

Abstract: In the applications of three-phase two-level voltage source inverters (VSIs) relatively large energy storagecapacitors are used to absorb the high DC-link current ripples mainly caused by the circulating reactivepower, the switched AC phase current flowing to the DC-link, and other dynamic and/or asymmetricoperating conditions. Especially for electrolytic capacitor technology the typically high current stressand consequent losses is known to limit the power electronics lifetime, thus the design and selection ofthis component is critical for the whole system. To alleviate this problem, a new model predictive control(MPC) cost function which enables DC-link capacitor current ripple reduction is proposed in this paper.Based on the derived DC-link current mathematical model and the available VSI switching states, thefuture DC current ripple can be predicted, and then the optimized space vectors that best tracks the sinusoidaloutput current and minimizes the DC-link current ripple are chosen. Compared with conventionalDC-link capacitor current reduction methods, the proposed approach has the advantage to incorporatean outstanding fast current control dynamics as well as being of relatively simple implementation becausethere is no need to adjust the switching signals or space vectors in the modulation as function ofoperational conditions of the system. Simulation and experimental results are presented verifying theeffectiveness of the proposed MPC method.

   Modulation scheme with common mode and differential mode voltage elimination for a five level inverter fed open end winding induction motor drive
By ARUN RAHUL S [View]
[Download]

Abstract: A five level inverter topology with single DC supply is analysed for an open end winding inductionmotor (OEWIM) drive. A carrier based modulation scheme is proposed to eliminate the common mode (CMV) and differential mode voltages (DMV). The modulation scheme utilises the voltage vector and switching state redundancy of the inverter topology. The voltage vector redundancy is used to eliminate the DMV and switching state redundancy is used to eliminate the CMV. Compared to the conventional level shifted PWM method, the proposed modulation scheme offers improved harmonic performance and also ensures self-balancing of capacitor voltages. The simulation studies are carried out in MATLAB for an OEWIM drive operating with open-loop constant Volts-per-Hertz control. The modulation scheme is implemented using TMS320F28379D controller board and an FPGA module.

   PWM Gain Linearization Algorithm for Medium Voltage Source Inverter
By Hamza EL JIHAD [View]
[Download]

Abstract: This paper deals with industrial Medium Voltage (MV) multilevel converters used in voltage source drives. The switching features (as minimum time of conduction) of the power electronic components induce some non-linearities on the output voltage, that increase the harmonics and limit the maximum power of the drive. To overcome these drawbacks, we will present an algorithm that keeps the linearity of the converter and by the way increases the drive power and mitigate some harmonics.

EPE 2020 - DS2h: PWM and Control Techniques
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2020 ECCE Europe - Conference > EPE 2020 - Topic 03: Measurement and Control > EPE 2020 - DS2h: PWM and Control Techniques
	[return to parent folder]

	A Full State-Variable Predictive Control of Bi-directional Boost Converters with Guaranteed Stability By Yu LI	[View] [Download]
Abstract: This work proposes a new direct predictive control with full state-variable for bi-directional DC-DC converters. With the proposed controller, both inductor current and capacitor voltage are incorporated into a unified cost function. The proposed controller allows all state variables to converge to a predefined region resulting in a good steady-state performance. Additionally, the weighting factor matrix based on the Lyapunov theory is analytically designed. Moreover, the steady-state error of the output voltage caused by model mismatch is addressed with a simple integral compensator. To the end, the proposed method is validated on a lab-constructed test bench using experimental results.

	A New ZVS Zone Identification for Dual Active Bridge with a General Modulation Objective By Suman MAHARANA	[View] [Download]
Abstract: In this work, a performance optimization for dual active bridge is focused with a novel zero-voltage switching-zone identification in instantaneous link current-transmitted power plane with the variation ofinner and outer phase shifts. The proposed solution provides the soft switching zones for all switchesalong with an effective mapping of any general modulation objective like link current optimization.

	Influence of Generalized Discontinuous Pulse Width Modulation (GDPWM) on the DC-link Current and Voltage Ripple in Battery-fed PWM Inverter Systems By Panagiotis MANTZANAS	[View] [Download]
Abstract: In battery-fed pulse width modulated inverters, the DC-link capacitor represents a limiting factor in terms of power density. The size of the DC-link capacitor strongly depends on its current and voltage ripple. This paper investigates the modulation method "Generalized Discontinuous Pulse Width Modulation" regarding DC-link current and voltage ripple in battery-fed pulse width modulated two-level three-phase voltage source-source inverters. "Generalized Discontinuous Pulse Width Modulation" already proved to be effective in reducing the inverter switching losses. Parameter studies performed in this paper reveal that this modulation method also enables a reduction of the DC-link voltage ripple in comparison to the widely used modulation method "centered space vector modulation".

	Model Predictive Control for the Reduction of DC-link Current Ripple in Two-level Three-phase Voltage Source Inverters By Junzhong XU	[View] [Download]
Abstract: In the applications of three-phase two-level voltage source inverters (VSIs) relatively large energy storagecapacitors are used to absorb the high DC-link current ripples mainly caused by the circulating reactivepower, the switched AC phase current flowing to the DC-link, and other dynamic and/or asymmetricoperating conditions. Especially for electrolytic capacitor technology the typically high current stressand consequent losses is known to limit the power electronics lifetime, thus the design and selection ofthis component is critical for the whole system. To alleviate this problem, a new model predictive control(MPC) cost function which enables DC-link capacitor current ripple reduction is proposed in this paper.Based on the derived DC-link current mathematical model and the available VSI switching states, thefuture DC current ripple can be predicted, and then the optimized space vectors that best tracks the sinusoidaloutput current and minimizes the DC-link current ripple are chosen. Compared with conventionalDC-link capacitor current reduction methods, the proposed approach has the advantage to incorporatean outstanding fast current control dynamics as well as being of relatively simple implementation becausethere is no need to adjust the switching signals or space vectors in the modulation as function ofoperational conditions of the system. Simulation and experimental results are presented verifying theeffectiveness of the proposed MPC method.

	Modulation scheme with common mode and differential mode voltage elimination for a five level inverter fed open end winding induction motor drive By ARUN RAHUL S	[View] [Download]
Abstract: A five level inverter topology with single DC supply is analysed for an open end winding inductionmotor (OEWIM) drive. A carrier based modulation scheme is proposed to eliminate the common mode (CMV) and differential mode voltages (DMV). The modulation scheme utilises the voltage vector and switching state redundancy of the inverter topology. The voltage vector redundancy is used to eliminate the DMV and switching state redundancy is used to eliminate the CMV. Compared to the conventional level shifted PWM method, the proposed modulation scheme offers improved harmonic performance and also ensures self-balancing of capacitor voltages. The simulation studies are carried out in MATLAB for an OEWIM drive operating with open-loop constant Volts-per-Hertz control. The modulation scheme is implemented using TMS320F28379D controller board and an FPGA module.

	PWM Gain Linearization Algorithm for Medium Voltage Source Inverter By Hamza EL JIHAD	[View] [Download]
Abstract: This paper deals with industrial Medium Voltage (MV) multilevel converters used in voltage source drives. The switching features (as minimum time of conduction) of the power electronic components induce some non-linearities on the output voltage, that increase the harmonics and limit the maximum power of the drive. To overcome these drawbacks, we will present an algorithm that keeps the linearity of the converter and by the way increases the drive power and mitigate some harmonics.