EPE Association: EPE 2011 - LS6d: Topic 07: Application of Control Methods to Electrical Systems

EPE 2011 - LS6d: Topic 07: Application of Control Methods to Electrical Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 07: Application of Control Methods To Electrical Systems > EPE 2011 - LS6d: Topic 07: Application of Control Methods to Electrical Systems

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   A Method of Voltage Limiting and Distortion Avoidance for Islanded Inverter-Fed Networks under Fault
By Cornelis PLET, Tim GREEN [View]
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Abstract: Inverter current limiting in islanded networks during unbalanced faults can cause voltage distortion. By using the control system to emulate a parallel impedance, this distortion can be avoided whilst current control is maintained and fault current is delivered to the fault. Experimental results from a 10 kVA inverter system are provided to verify the theoretical analysis that has been developed.

   Frequency / Duty Cycle Current-Mode Fuzzy Control for LCC Resonant Converter
By Manli HU, Joachim BOECKER, Norbert FROEHLEKE [View]
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Abstract: A novel current-mode nonlinear fuzzy controller with adaptive gain is developed for the LCC resonant converter applied in very low frequency high voltage generators using switching frequency and duty cycle as control variables. The designed fuzzy controller is verified through simulations. Comparison between the fuzzy controller and a standard linear controller indicates the correctness and effectiveness of the novel approach.

   Straightforward Current Control - One Step Controller based on Current Slope Detection
By Frank BECKER, Hassan ENNADIFI, Michael BRAUN [View]
[Download]

Abstract: This paper presents the investigation of the performance of a new fast adaptive current control. The control is capable to achieve a setpoint of the current within one pulse period without the knowledge of the control parameters like the inductance or the d.c. link voltage. For the identification of the control path the current response, caused by the alternation of the switching states of the power-converter, is used. Hence no manual controller adjustment is necessary which leads to a simplification of the set-up process of drive applications. Because of the permanent identification of the system behaviour, the control is capable to compensate a variation of the control parameters during the operation of the drive system. An experimental comparison of the control scheme to a standard PI control and a state control shows its robustness and performance under changing conditions of the control path.

EPE 2011 - LS6d: Topic 07: Application of Control Methods to Electrical Systems
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 07: Application of Control Methods To Electrical Systems > EPE 2011 - LS6d: Topic 07: Application of Control Methods to Electrical Systems
	[return to parent folder]

	A Method of Voltage Limiting and Distortion Avoidance for Islanded Inverter-Fed Networks under Fault By Cornelis PLET, Tim GREEN	[View] [Download]
Abstract: Inverter current limiting in islanded networks during unbalanced faults can cause voltage distortion. By using the control system to emulate a parallel impedance, this distortion can be avoided whilst current control is maintained and fault current is delivered to the fault. Experimental results from a 10 kVA inverter system are provided to verify the theoretical analysis that has been developed.

	Frequency / Duty Cycle Current-Mode Fuzzy Control for LCC Resonant Converter By Manli HU, Joachim BOECKER, Norbert FROEHLEKE	[View] [Download]
Abstract: A novel current-mode nonlinear fuzzy controller with adaptive gain is developed for the LCC resonant converter applied in very low frequency high voltage generators using switching frequency and duty cycle as control variables. The designed fuzzy controller is verified through simulations. Comparison between the fuzzy controller and a standard linear controller indicates the correctness and effectiveness of the novel approach.

	Straightforward Current Control - One Step Controller based on Current Slope Detection By Frank BECKER, Hassan ENNADIFI, Michael BRAUN	[View] [Download]
Abstract: This paper presents the investigation of the performance of a new fast adaptive current control. The control is capable to achieve a setpoint of the current within one pulse period without the knowledge of the control parameters like the inductance or the d.c. link voltage. For the identification of the control path the current response, caused by the alternation of the switching states of the power-converter, is used. Hence no manual controller adjustment is necessary which leads to a simplification of the set-up process of drive applications. Because of the permanent identification of the system behaviour, the control is capable to compensate a variation of the control parameters during the operation of the drive system. An experimental comparison of the control scheme to a standard PI control and a state control shows its robustness and performance under changing conditions of the control path.