EPE Association: EPE 2011 - LS1b: Topic 16: Microgrid Control

EPE 2011 - LS1b: Topic 16: Microgrid Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 16: Power electronics in transmission and distribution > EPE 2011 - LS1b: Topic 16: Microgrid Control

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   Connection and Disconnection Transients for Micro-Grids under unbalance load condition
By Joan ROCABERT, Gustavo M.S. AZEVEDO, Jose Ignacio CANDELA, Blaabjerg FREDE, Pedro RODRIGUEZ [View]
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Abstract: The recent grid integration of Distributed Energy Resources (DER) possibility the formation ofintentional islands in the case of a grid fault conditions. For such island formation is required an activeagent capable of governing the micro-grid connection state in a safe mode, especially in connectionand disconnection transients. This paper focuses on the design of a method oriented to carry out astable intentional disconnection, and later re-connection, of local grids from the main distribution gridin an intentional way; also under unbalance load condition. Seamless transfer between grid-connectedand isolated mode has been achieved in an alpha-beta stationary reference frame with a frequencybased synchronization control loop. Simulation and experimental results are provided to verify theproper performance of the proposed solution.

   Optimization of Micro-Grid Operation by Dynamic Grid Mapping and Token Ring Control
By Alessandro COSTABEBER, Paolo TENTI, Paolo MATTAVELLI, Tomaso ERSEGHE, Stefano TOMASIN [View]
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Abstract: In residential micro-grids, the distributed energy resources are interfaced with the grid by electronic power processors. If these processors perform cooperatively, full exploitation of energy sources can be achieved together with distribution loss reduction and voltage stabilization. The paper shows that this is possible without central controllers, by taking advantage of the local measurement, communication and control capability. In particular, it is shown that micro-grid operation can be optimized by applying token ring control and grid mapping techniques, which only require communication capability between neighbor nodes via power line.

   Stand Alone Power Supply System under High FCs Efficiency and New Technique for Batteries Charging/Discharging
By Essam HUSSAIN, Chris BINGHAM, David STONE [View]
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Abstract: The paper presents a hybrid standalone power conversion strategy for the integrated connection ofmultiple remote loads. The proposed system consists of fuel cells, PV panels, a wind turbine andbatteries. The primary aim of the proposed controller is to operate the fuel cells about their maximumefficiency region. A proposed control technique for charging and discharging allows the renewableenergy sources to i) maintain the battery charge (where possible) as well as supply to the load, or ii)maintain the battery charge and other sources to directly supply the load, or iii) to charge the batterywhen it is possible.

EPE 2011 - LS1b: Topic 16: Microgrid Control
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2011 ECCE Europe - Conference > EPE 2011 - Topic 16: Power electronics in transmission and distribution > EPE 2011 - LS1b: Topic 16: Microgrid Control
	[return to parent folder]

	Connection and Disconnection Transients for Micro-Grids under unbalance load condition By Joan ROCABERT, Gustavo M.S. AZEVEDO, Jose Ignacio CANDELA, Blaabjerg FREDE, Pedro RODRIGUEZ	[View] [Download]
Abstract: The recent grid integration of Distributed Energy Resources (DER) possibility the formation ofintentional islands in the case of a grid fault conditions. For such island formation is required an activeagent capable of governing the micro-grid connection state in a safe mode, especially in connectionand disconnection transients. This paper focuses on the design of a method oriented to carry out astable intentional disconnection, and later re-connection, of local grids from the main distribution gridin an intentional way; also under unbalance load condition. Seamless transfer between grid-connectedand isolated mode has been achieved in an alpha-beta stationary reference frame with a frequencybased synchronization control loop. Simulation and experimental results are provided to verify theproper performance of the proposed solution.

	Optimization of Micro-Grid Operation by Dynamic Grid Mapping and Token Ring Control By Alessandro COSTABEBER, Paolo TENTI, Paolo MATTAVELLI, Tomaso ERSEGHE, Stefano TOMASIN	[View] [Download]
Abstract: In residential micro-grids, the distributed energy resources are interfaced with the grid by electronic power processors. If these processors perform cooperatively, full exploitation of energy sources can be achieved together with distribution loss reduction and voltage stabilization. The paper shows that this is possible without central controllers, by taking advantage of the local measurement, communication and control capability. In particular, it is shown that micro-grid operation can be optimized by applying token ring control and grid mapping techniques, which only require communication capability between neighbor nodes via power line.

	Stand Alone Power Supply System under High FCs Efficiency and New Technique for Batteries Charging/Discharging By Essam HUSSAIN, Chris BINGHAM, David STONE	[View] [Download]
Abstract: The paper presents a hybrid standalone power conversion strategy for the integrated connection ofmultiple remote loads. The proposed system consists of fuel cells, PV panels, a wind turbine andbatteries. The primary aim of the proposed controller is to operate the fuel cells about their maximumefficiency region. A proposed control technique for charging and discharging allows the renewableenergy sources to i) maintain the battery charge (where possible) as well as supply to the load, or ii)maintain the battery charge and other sources to directly supply the load, or iii) to charge the batterywhen it is possible.