EPE Association: EPE 2015 - LS5f: Micro-grids and Smart Grids

EPE 2015 - LS5f: Micro-grids and Smart Grids
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 06: Grids and Smart Grids > EPE 2015 - LS5f: Micro-grids and Smart Grids

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   Cooperative control of reactive power of distributed PV systems to suppress voltage of distribution line along railroad track
By Hitoshi HAYASHIYA [View]
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Abstract: There are a lot of potentials to install photovoltaic panels along the railroad track and some systems have been already realizedin Japanese railway network. If a lot of PV systems have installed along the railway premises in the future, the generated power has to be transmitted to the station for the self-consumption because the electric loads along the railroad track between the stations are, in many cases, small.To be cost effective, simple cooperative reactive power control of power conditioner for distribution line voltage control to realize inverse backflow from PV panels to stationis required, proposed and tested in the practical trackside solar system. The results of the cooperative reactive power control by two PV-PCSs are shown in this paper.

   Dynamic Consensus Algorithm based Distributed Voltage Harmonic Compensation in Islanded Microgrids
By Lexuan MENG [View]
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Abstract: In islanded microgrids, the existence of nonlinear electric loads may cause voltage distortion andaffect the performance of power quality sensitive equipment. Thanks to the prevalent utilization ofinterfacing power electronic devices and information/communication technologies, distributedgenerators can be employed as compensators to enhance the power quality on consumer side.However, conventional centralized control is facing obstacles because of the distributed fashion ofgeneration and consumption. Accordingly, this paper proposes a consensus algorithm baseddistributed hierarchical control to realize voltage harmonic compensation and accurate current sharingin multi-bus islanded microgrids. Low order harmonic components are considered as examples in thispaper. Harmonic current sharing is also realized among distributed generators by applying theproposed methods. Plug-and-play capability is demonstrated for flexible operation. The proposedmethod is based on proper analysis and modeling of the system.

   Impact of power converters efficiency on building-integrated microgrid
By Hongwei WU [View]
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Abstract: This paper presents a macroscopic comparison between the global energy efficiency of DC and AC local microgrid in urban areas. Aiming to reduce multiple energy conversions and based on an industrial photovoltaic inverter efficiency obtained experimentally, the technical feasibility results lead to DC network distribution for building-integrated DC microgrid.

   Islanding Detection Method Based on Virtual PCC Voltage Phase-shift in Microgrid
By Ilhem SLAMA-BELKHODJA [View]
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Abstract: This paper presents a fast passive islanding detection method based on virtual phase-shift between the real voltage seen at the point of common coupling and its created image in a Microgrid. The proposed algorithm consists of extracting the positive and negative sequences of the voltage at this point using a second order generalized integrator in two-way; to synchronize properly the system with the utility grid and to differentiate the islanding condition from other grid disturbance. Then, calculate the phase-shift between the real positive voltage and its image. In one way, once a grid fault occurs, hence leading to additional grid fault impedance emerging, the phase-shift varies. According to this variation duration and level, Microgrid can take the decision of disconnecting from the utility grid to operate autonomously or staying in connected-mode. In the other way, under unintentional islanding condition Microgrid can detect the phase-shift occurrence even in non-detection zone. A simple and efficient phase-shift calculator is proposed. Theoretical analysis, simulation and experimental results are presented to validate the proposed method.

EPE 2015 - LS5f: Micro-grids and Smart Grids
You are here: EPE Documents > 01 - EPE & EPE ECCE Conference Proceedings > EPE 2015 ECCE Europe - Conference > EPE 2015 - Topic 06: Grids and Smart Grids > EPE 2015 - LS5f: Micro-grids and Smart Grids
	[return to parent folder]

	Cooperative control of reactive power of distributed PV systems to suppress voltage of distribution line along railroad track By Hitoshi HAYASHIYA	[View] [Download]
Abstract: There are a lot of potentials to install photovoltaic panels along the railroad track and some systems have been already realizedin Japanese railway network. If a lot of PV systems have installed along the railway premises in the future, the generated power has to be transmitted to the station for the self-consumption because the electric loads along the railroad track between the stations are, in many cases, small.To be cost effective, simple cooperative reactive power control of power conditioner for distribution line voltage control to realize inverse backflow from PV panels to stationis required, proposed and tested in the practical trackside solar system. The results of the cooperative reactive power control by two PV-PCSs are shown in this paper.

	Dynamic Consensus Algorithm based Distributed Voltage Harmonic Compensation in Islanded Microgrids By Lexuan MENG	[View] [Download]
Abstract: In islanded microgrids, the existence of nonlinear electric loads may cause voltage distortion andaffect the performance of power quality sensitive equipment. Thanks to the prevalent utilization ofinterfacing power electronic devices and information/communication technologies, distributedgenerators can be employed as compensators to enhance the power quality on consumer side.However, conventional centralized control is facing obstacles because of the distributed fashion ofgeneration and consumption. Accordingly, this paper proposes a consensus algorithm baseddistributed hierarchical control to realize voltage harmonic compensation and accurate current sharingin multi-bus islanded microgrids. Low order harmonic components are considered as examples in thispaper. Harmonic current sharing is also realized among distributed generators by applying theproposed methods. Plug-and-play capability is demonstrated for flexible operation. The proposedmethod is based on proper analysis and modeling of the system.

	Impact of power converters efficiency on building-integrated microgrid By Hongwei WU	[View] [Download]
Abstract: This paper presents a macroscopic comparison between the global energy efficiency of DC and AC local microgrid in urban areas. Aiming to reduce multiple energy conversions and based on an industrial photovoltaic inverter efficiency obtained experimentally, the technical feasibility results lead to DC network distribution for building-integrated DC microgrid.

	Islanding Detection Method Based on Virtual PCC Voltage Phase-shift in Microgrid By Ilhem SLAMA-BELKHODJA	[View] [Download]
Abstract: This paper presents a fast passive islanding detection method based on virtual phase-shift between the real voltage seen at the point of common coupling and its created image in a Microgrid. The proposed algorithm consists of extracting the positive and negative sequences of the voltage at this point using a second order generalized integrator in two-way; to synchronize properly the system with the utility grid and to differentiate the islanding condition from other grid disturbance. Then, calculate the phase-shift between the real positive voltage and its image. In one way, once a grid fault occurs, hence leading to additional grid fault impedance emerging, the phase-shift varies. According to this variation duration and level, Microgrid can take the decision of disconnecting from the utility grid to operate autonomously or staying in connected-mode. In the other way, under unintentional islanding condition Microgrid can detect the phase-shift occurrence even in non-detection zone. A simple and efficient phase-shift calculator is proposed. Theoretical analysis, simulation and experimental results are presented to validate the proposed method.