EPE Association: EPE 2016 - LS4e: Micro-grids

EPE 2016 - LS4e: Micro-grids
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 06: Grids and Smart Grids > EPE 2016 - LS4e: Micro-grids

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   Day-ahead Optimal Operational and Reserve Power Dispatching in a PV based Urban Microgrid
By XINGYU YAN [View]
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Abstract: Accurate sizing of power reserve (PR) due to inaccurate forecast of both renewable energy sources (RES)and load demand in a microgrid can provide substantial cost reductions. This paper proposes two strategiesto dispatch the PR into different power generators. The first one uses only micro gas turbine (MGT).The second one uses MGTs plus PV based active generators (AGs). The latter enables the RES to coverthe system load demand and PR for some period during a day. To implement those methods, firstly an urbanmicrogrid with PV power generators is introduced. Then, day-ahead optimal planning with dynamicprogramming (DP) for unit commitment problem (UCP) is applied under several non-linear constraints.Finally, a case study application has been completed to verify the proposed methods.

   Implementation issues on the design of current loops based on resonant regulators for isolated microgrids
By Federico DE BOSIO [View]
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Abstract: This paper analyzes the influence of state feedback coupling between the capacitor voltage and inductor current in voltage source inverters (VSI) operating in stand-alone microgrids. A decoupling technique is proposed as an effective measure to enhance the dynamics. Further implementation issues and control structures are also considered. Lab-scale experimental results prove the validity of the approaches.

   Selection of 5 kW converter leg for power electronic system for residential buildings
By Marcin ZYGMANOWSKI [View]
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Abstract: The paper deals with the selection procedure for designing of a 5 kW converter leg for the power electronic system for residential buildings. Three different variants are investigated, which are two-level converters based on Si-IGBTs, SiC-MOSFETs and the NPC-T converter with Si-IGBTs. Power loss analysis together with inductor design aspects are considered.

   Virtual Synchronous-Machine Control of Voltage-Source Converters in a Low-Voltage Microgrid
By Diarmaid HOGAN [View]
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Abstract: In order to facilitate the further integration of distributed renewable generation into existing power systems, enhanced control schemes for grid-tied power electronic converters are necessary to ensure non-synchronous power sources can provide power and support to the grid. The virtual-synchronousmachine concept proposes the use of control schemes to enable static generators to operate with the dynamics of rotating synchronous generators. In this paper, a control scheme is presented based on the principle of active-power synchronization to regulate the active power of a grid-tied voltage-source converter based on an emulation of the synchronous-machine swing equation. Design of a cascaded inner-loop voltage and resonant current control is presented to regulate the output voltage as specified via the outer-loop virtual-machine control scheme responsible for power regulation. The performance of this control scheme is investigated within the context of microgrid operation for the provision of active and reactive power to the system, and microgrid frequency support. Experimental validation isprovided via the use of a 15 kVA three-phase VSC in a 90 kVA 400V microgrid.

EPE 2016 - LS4e: Micro-grids
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2016 ECCE Europe - Conference > EPE 2016 - Topic 06: Grids and Smart Grids > EPE 2016 - LS4e: Micro-grids
	[return to parent folder]

	Day-ahead Optimal Operational and Reserve Power Dispatching in a PV based Urban Microgrid By XINGYU YAN	[View] [Download]
Abstract: Accurate sizing of power reserve (PR) due to inaccurate forecast of both renewable energy sources (RES)and load demand in a microgrid can provide substantial cost reductions. This paper proposes two strategiesto dispatch the PR into different power generators. The first one uses only micro gas turbine (MGT).The second one uses MGTs plus PV based active generators (AGs). The latter enables the RES to coverthe system load demand and PR for some period during a day. To implement those methods, firstly an urbanmicrogrid with PV power generators is introduced. Then, day-ahead optimal planning with dynamicprogramming (DP) for unit commitment problem (UCP) is applied under several non-linear constraints.Finally, a case study application has been completed to verify the proposed methods.

	Implementation issues on the design of current loops based on resonant regulators for isolated microgrids By Federico DE BOSIO	[View] [Download]
Abstract: This paper analyzes the influence of state feedback coupling between the capacitor voltage and inductor current in voltage source inverters (VSI) operating in stand-alone microgrids. A decoupling technique is proposed as an effective measure to enhance the dynamics. Further implementation issues and control structures are also considered. Lab-scale experimental results prove the validity of the approaches.

	Selection of 5 kW converter leg for power electronic system for residential buildings By Marcin ZYGMANOWSKI	[View] [Download]
Abstract: The paper deals with the selection procedure for designing of a 5 kW converter leg for the power electronic system for residential buildings. Three different variants are investigated, which are two-level converters based on Si-IGBTs, SiC-MOSFETs and the NPC-T converter with Si-IGBTs. Power loss analysis together with inductor design aspects are considered.

	Virtual Synchronous-Machine Control of Voltage-Source Converters in a Low-Voltage Microgrid By Diarmaid HOGAN	[View] [Download]
Abstract: In order to facilitate the further integration of distributed renewable generation into existing power systems, enhanced control schemes for grid-tied power electronic converters are necessary to ensure non-synchronous power sources can provide power and support to the grid. The virtual-synchronousmachine concept proposes the use of control schemes to enable static generators to operate with the dynamics of rotating synchronous generators. In this paper, a control scheme is presented based on the principle of active-power synchronization to regulate the active power of a grid-tied voltage-source converter based on an emulation of the synchronous-machine swing equation. Design of a cascaded inner-loop voltage and resonant current control is presented to regulate the output voltage as specified via the outer-loop virtual-machine control scheme responsible for power regulation. The performance of this control scheme is investigated within the context of microgrid operation for the provision of active and reactive power to the system, and microgrid frequency support. Experimental validation isprovided via the use of a 15 kVA three-phase VSC in a 90 kVA 400V microgrid.