EPE Association: EPE 2009 - Subtopic 14-9 - LS: 'Control of the Grid Side Converters of the Renewable Energy Sources'

EPE 2009 - Subtopic 14-9 - LS: 'Control of the Grid Side Converters of the Renewable Energy Sources'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 14: 'Electrical Energy Generating Systems, Renewable Energy Systems' > EPE 2009 - Subtopic 14-9 - LS: 'Control of the Grid Side Converters of the Renewable Energy Sources'

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   Control Design and Experimental Verification of a Multi-Function Single-Phase Bidirectional PWM Converter for Renewable Energy Systems
By Dong Dong; Timothy Thacker; Rolando Burgos; Dushan Boroyevich; Fred Wang; Bill Giewont [View]
[Download]

Abstract: This paper proposes a multi-function control system for single-phase bidirectional PWM converters for renewable energy system applications. A common inner ac current-loop between the different modes helps to facilitate a seamless transition between them, where several individually designed outer loops alternatively perform the different regulation tasks, namely ac voltage, dc voltage, and dc current. The frequency-response based design procedure for the proposed control system is presented in detail for all the converter operating modes, and its performance is verified experimentally using a DSP-controlled 7 kW 120 V ac â€“ 300 V dc laboratory prototype.

   Discrete Sliding Mode Current Control of Three-Phase Grid-Connected PWM Converters
By Joerg DANNEHL, Friedrich W. FUCHS [View]
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Abstract: Discrete sliding mode current control of grid-connected PWM converters is designed and analyzed. A rather low switching frequency of 2.5 kHz is used. Main contributions of this work are the use of an advanced discrete system model, taking the PWM and computation delays directly into account, and comparison of different approaches for performance improvement. Moreover, the generation of the reference state trajectory and a feedforward taking into account physical limitations is presented. Experimental results confirm the theoretical results.

   Grid sequence detector based on a stationary reference frame
By Eider ROBLES, Josep POU, Salvador CEBALLOS, Igor GABIOLA, Maider SANTOS [View]
[Download]

Abstract: This paper proposes a new three-phase positive sequence detector. The scheme is based on a stationary reference frame and a Moving Average Filter (MAF) that guarantees the complete cancellation of harmonics and grid imbalances. The performance of the MAF is mathematically analyzed and a proper selection of the optimal filter's window width is realized. The proposed detector operates in open loop and there is no PI controller to be tuned. Thus, the dynamic response and simplicity is improved compared to other solutions. Performance of the proposed detector is verified through simulation and experiment. It shows very good performance under extreme grid voltage conditions, allowing fast detection of the grid voltage positive sequence (within one grid voltage cycle).

EPE 2009 - Subtopic 14-9 - LS: 'Control of the Grid Side Converters of the Renewable Energy Sources'
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2009 - Conference > EPE 2009 - Topic 14: 'Electrical Energy Generating Systems, Renewable Energy Systems' > EPE 2009 - Subtopic 14-9 - LS: 'Control of the Grid Side Converters of the Renewable Energy Sources'
	[return to parent folder]

	Control Design and Experimental Verification of a Multi-Function Single-Phase Bidirectional PWM Converter for Renewable Energy Systems By Dong Dong; Timothy Thacker; Rolando Burgos; Dushan Boroyevich; Fred Wang; Bill Giewont	[View] [Download]
Abstract: This paper proposes a multi-function control system for single-phase bidirectional PWM converters for renewable energy system applications. A common inner ac current-loop between the different modes helps to facilitate a seamless transition between them, where several individually designed outer loops alternatively perform the different regulation tasks, namely ac voltage, dc voltage, and dc current. The frequency-response based design procedure for the proposed control system is presented in detail for all the converter operating modes, and its performance is verified experimentally using a DSP-controlled 7 kW 120 V ac â€“ 300 V dc laboratory prototype.

	Discrete Sliding Mode Current Control of Three-Phase Grid-Connected PWM Converters By Joerg DANNEHL, Friedrich W. FUCHS	[View] [Download]
Abstract: Discrete sliding mode current control of grid-connected PWM converters is designed and analyzed. A rather low switching frequency of 2.5 kHz is used. Main contributions of this work are the use of an advanced discrete system model, taking the PWM and computation delays directly into account, and comparison of different approaches for performance improvement. Moreover, the generation of the reference state trajectory and a feedforward taking into account physical limitations is presented. Experimental results confirm the theoretical results.

	Grid sequence detector based on a stationary reference frame By Eider ROBLES, Josep POU, Salvador CEBALLOS, Igor GABIOLA, Maider SANTOS	[View] [Download]
Abstract: This paper proposes a new three-phase positive sequence detector. The scheme is based on a stationary reference frame and a Moving Average Filter (MAF) that guarantees the complete cancellation of harmonics and grid imbalances. The performance of the MAF is mathematically analyzed and a proper selection of the optimal filter's window width is realized. The proposed detector operates in open loop and there is no PI controller to be tuned. Thus, the dynamic response and simplicity is improved compared to other solutions. Performance of the proposed detector is verified through simulation and experiment. It shows very good performance under extreme grid voltage conditions, allowing fast detection of the grid voltage positive sequence (within one grid voltage cycle).