The Experts below are selected from a list of 609 Experts worldwide ranked by ideXlab platform

Lexuan Meng - One of the best experts on this subject based on the ideXlab platform.

  • GLOBECOM Workshops - On the Impact of Wireless Jamming on the Distributed Secondary Microgrid Control
    2016 IEEE Globecom Workshops (GC Wkshps), 2016
    Co-Authors: Pietro Danzi, Cedomir Stefanovic, Lexuan Meng, Josep M. Guerrero, Petar Popovski
    Abstract:

    The secondary Control in direct current microgrids (MGs) is used to restore the voltage deviations caused by the primary droop Control, where the latter is implemented locally in each distributed generator and reacts to load variations. Numerous recent works propose to implement the secondary Control in a distributed fashion, relying on a communication system to achieve consensus among MG units. This paper shows that, if the system is not designed to cope with adversary communication impairments, then a malicious attacker can apply a simple jamming of a few units of the MG and thus compromise the secondary MG Control. Compared to other denial-of-service attacks that are oriented against the Tertiary Control, such as economic dispatch, the attack on the secondary Control presented here can be more severe, as it disrupts the basic functionality of the MG.

  • Tertiary Control of voltage unbalance compensation for optimal power quality in islanded microgrids
    2016 IEEE Power and Energy Society General Meeting (PESGM), 2016
    Co-Authors: Lexuan Meng, Mehdi Savaghebi, Fen Tang, Juan Vasquez, Josep Guerrero
    Abstract:

    Summary form only given. In multi-bus islanded microgrids, the power quality requirements for different areas and buses can be different. This paper proposes a hierarchical Control to realize optimal unbalance compensation for satisfying the power quality requirements in different areas. Primary and secondary Controllers are applied to realize unbalance compensation for critical bus (CB) and at the same time, to make distributed generators (DGs) equally share the compensation efforts. Tertiary Control, which inherently is an optimization method, is implemented to adjust the compensating effort of each DG considering the voltage unbalance limits in local buses and DG terminals. This method realizes multi-power-quality-level Control in a multi-bus islanded system by optimally utilizing DGs as distributed compensators and saves the investment for additional compensation equipment. Hardware-in-the-loop results demonstrate the effectiveness of the method.

  • Flexible System Integration and Advanced Hierarchical Control Architectures in the Microgrid Research Laboratory of Aalborg University
    IEEE Transactions on Industry Applications, 2016
    Co-Authors: Lexuan Meng, Moisès Graells, Mehdi Savaghebi, Juan C. Vasquez, Josep M. Guerrero, Tomislav Dragicevic, Adriana Luna, Enrique Rodríguez Díaz, Bo Sun, Fabio Andrade
    Abstract:

    This paper presents the system integration and hierarchical Control implementation in an inverter-based Microgrid Research Laboratory (MGRL) at Aalborg University, Denmark. MGRL aims to provide a flexible experimental platform for comprehensive studies of microgrids. The structure of the laboratory, including the facilities, configurations, and communication network, is first introduced. The complete Control system is based on a generic hierarchical Control scheme including primary, secondary, and Tertiary Control. Primary Control loops are developed and implemented in digital Control platform, while system supervision, advanced secondary, and Tertiary management are realized in a microgrid central Controller. The software and hardware schemes are described. Several example case studies are introduced and performed to achieve power quality regulation, energy management, and flywheel energy storage system Control. Experimental results are presented to show the performance of the whole system.

  • On the Impact of Wireless Jamming on the Distributed Secondary Microgrid Control
    2016 IEEE Globecom Workshops (GC Wkshps), 2016
    Co-Authors: Pietro Danzi, Cedomir Stefanovic, Lexuan Meng, Josep M. Guerrero, Petar Popovski
    Abstract:

    The secondary Control in direct current microgrids (MGs) is used to restore the voltage deviations caused by the primary droop Control, where the latter is implemented locally in each distributed generator and reacts to load variations. Numerous recent works propose to implement the secondary Control in a distributed fashion, relying on a communication system to achieve consensus among MG units. This paper shows that, if the system is not designed to cope with adversary communication impairments, then a malicious attacker can apply a simple jamming of a few units of the MG and thus compromise the secondary MG Control. Compared to other denial-of-service attacks that are oriented against the Tertiary Control, such as economic dispatch, the attack on the secondary Control presented here can be more severe, as it disrupts the basic functionality of the MG.

  • Microgrid central Controller development and hierarchical Control implementation in the intelligent microgrid lab of Aalborg University
    Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, 2015
    Co-Authors: Lexuan Meng, Fabio Andrade, Mehdi Savaghebi, Juan C. Vasquez, Moisès Graells
    Abstract:

    This paper presents the development of a microgrid central Controller in an inverter-based intelligent microgrid (iMG) lab in Aalborg University, Denmark. The iMG lab aims to provide a flexible experimental platform for comprehensive studies of microgrids. The complete Control system applied in this lab is based on the hierarchical Control scheme for microgrids and includes primary, secondary and Tertiary Control. The structure of the lab, including the lab facilities, configurations and communication network, is first introduced. Primary Control loops are developed in MATLAB/Simulink and compiled to dSPACEs for local Control purposes. In order to realize system supervision and proper secondary and Tertiary management, a LabVIEW-based microgrid central Controller is also developed. The software and hardware schemes are described. An example case is introduced and tested in the iMG lab for voltage/frequency restoration and voltage unbalance compensation. Experimental results are presented to show the performance of the whole system.

Juan C. Vasquez - One of the best experts on this subject based on the ideXlab platform.

  • Flexible System Integration and Advanced Hierarchical Control Architectures in the Microgrid Research Laboratory of Aalborg University
    IEEE Transactions on Industry Applications, 2016
    Co-Authors: Lexuan Meng, Moisès Graells, Mehdi Savaghebi, Juan C. Vasquez, Josep M. Guerrero, Tomislav Dragicevic, Adriana Luna, Enrique Rodríguez Díaz, Bo Sun, Fabio Andrade
    Abstract:

    This paper presents the system integration and hierarchical Control implementation in an inverter-based Microgrid Research Laboratory (MGRL) at Aalborg University, Denmark. MGRL aims to provide a flexible experimental platform for comprehensive studies of microgrids. The structure of the laboratory, including the facilities, configurations, and communication network, is first introduced. The complete Control system is based on a generic hierarchical Control scheme including primary, secondary, and Tertiary Control. Primary Control loops are developed and implemented in digital Control platform, while system supervision, advanced secondary, and Tertiary management are realized in a microgrid central Controller. The software and hardware schemes are described. Several example case studies are introduced and performed to achieve power quality regulation, energy management, and flywheel energy storage system Control. Experimental results are presented to show the performance of the whole system.

  • Microgrid central Controller development and hierarchical Control implementation in the intelligent microgrid lab of Aalborg University
    Conference Proceedings - IEEE Applied Power Electronics Conference and Exposition - APEC, 2015
    Co-Authors: Lexuan Meng, Fabio Andrade, Mehdi Savaghebi, Juan C. Vasquez, Moisès Graells
    Abstract:

    This paper presents the development of a microgrid central Controller in an inverter-based intelligent microgrid (iMG) lab in Aalborg University, Denmark. The iMG lab aims to provide a flexible experimental platform for comprehensive studies of microgrids. The complete Control system applied in this lab is based on the hierarchical Control scheme for microgrids and includes primary, secondary and Tertiary Control. The structure of the lab, including the lab facilities, configurations and communication network, is first introduced. Primary Control loops are developed in MATLAB/Simulink and compiled to dSPACEs for local Control purposes. In order to realize system supervision and proper secondary and Tertiary management, a LabVIEW-based microgrid central Controller is also developed. The software and hardware schemes are described. An example case is introduced and tested in the iMG lab for voltage/frequency restoration and voltage unbalance compensation. Experimental results are presented to show the performance of the whole system.

  • Hierarchical Control for voltage harmonics compensation in multi-area microgrids
    2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines Power Electronics and Drives (SDEMPED), 2015
    Co-Authors: Mohammad M. Hashempour, Mehdi Savaghebi, Juan C. Vasquez, Josep M. Guerrero
    Abstract:

    In this paper, the power quality of multi-area microgrids is addressed. For this, Active Power Filters (APFs) and Distributed Generators (DGs) inverters are used. To achieve the reference value of power quality indices of different areas, a strategy based on cooperation between DGs and APFs is proposed. Hierarchical Control is applied to Control DGs inverters and APFs in a coordinated way. Primary Control consists of power droop Controller of DGs, selective virtual impedance and voltage/current regulators. Based on the secondary Control, voltage compensation of Points of Common Coupling (PCCs) of multi-area microgrid is carried out by DGs. Voltage compensation of PCCs by DGs may cause violation from maximum allowable voltage distortion at DGs terminals. Thus, Tertiary Control is used to mitigate these violations by using APF in proper coordination with secondary Control. Evaluation of the proposed hierarchical Control is carried out by simulation.

  • ISIE - Agent-based distributed unbalance compensation for optimal power quality in islanded microgrids
    2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE), 2014
    Co-Authors: Lexuan Meng, Mehdi Savaghebi, Juan C. Vasquez, Josep M. Guerrero, Tomislav Dragicevic, Fen Tang
    Abstract:

    In microgrids, the distributed generators (DG) can be used as distributed compensators so as to compensate the voltage unbalances in the critical bus. However, the power quality disturbance in generator sides and local buses may be affected and exceeds the limit. It can be more convenient to implement Tertiary Control so as to adjust the compensation efforts among DGs and ensure the acceptable power quality in local buses. Moreover, as centralized Control methods have certain disadvantages, such as low flexibility, expandability and heavy computation burden, this paper proposes an agent-based distributed hierarchical Control method. Communication links are required between neighboring units. Consensus algorithm and optimization algorithm are implemented in Tertiary Control for global information discovery and local optimal decision-making respectively. The Tertiary Control gives lower level Controller a Tertiary compensation gain to adjust the local DG compensation effort so as to ensure the acceptable power quality in the local bus while keeping the best power quality in critical bus. Simulation results are shown to demonstrate the effectiveness of the method.

  • SSD - Tertiary Control for optimal unbalance compensation in islanded microgrids
    2014 IEEE 11th International Multi-Conference on Systems Signals & Devices (SSD14), 2014
    Co-Authors: Lexuan Meng, Juan C. Vasquez, Josep M. Guerrero, Fen Tang, Mehdi Savaghebi
    Abstract:

    In order to achieve desirable power quality in the critical bus (CB) in microgrids, primary and secondary Control can be used to realize unbalance compensation and at the same time, to make distributed generators (DGs) share the compensation efforts. Considering that the power quality requirements in different areas and for different consumers can be different, this paper implements a Tertiary Control over secondary and primary Control levels so as to achieve optimal unbalance compensation Control. Hardware-in-the-loop results are presented to demonstrate the effectiveness of the method.

Josep M. Guerrero - One of the best experts on this subject based on the ideXlab platform.

  • GLOBECOM Workshops - On the Impact of Wireless Jamming on the Distributed Secondary Microgrid Control
    2016 IEEE Globecom Workshops (GC Wkshps), 2016
    Co-Authors: Pietro Danzi, Cedomir Stefanovic, Lexuan Meng, Josep M. Guerrero, Petar Popovski
    Abstract:

    The secondary Control in direct current microgrids (MGs) is used to restore the voltage deviations caused by the primary droop Control, where the latter is implemented locally in each distributed generator and reacts to load variations. Numerous recent works propose to implement the secondary Control in a distributed fashion, relying on a communication system to achieve consensus among MG units. This paper shows that, if the system is not designed to cope with adversary communication impairments, then a malicious attacker can apply a simple jamming of a few units of the MG and thus compromise the secondary MG Control. Compared to other denial-of-service attacks that are oriented against the Tertiary Control, such as economic dispatch, the attack on the secondary Control presented here can be more severe, as it disrupts the basic functionality of the MG.

  • Flexible System Integration and Advanced Hierarchical Control Architectures in the Microgrid Research Laboratory of Aalborg University
    IEEE Transactions on Industry Applications, 2016
    Co-Authors: Lexuan Meng, Moisès Graells, Mehdi Savaghebi, Juan C. Vasquez, Josep M. Guerrero, Tomislav Dragicevic, Adriana Luna, Enrique Rodríguez Díaz, Bo Sun, Fabio Andrade
    Abstract:

    This paper presents the system integration and hierarchical Control implementation in an inverter-based Microgrid Research Laboratory (MGRL) at Aalborg University, Denmark. MGRL aims to provide a flexible experimental platform for comprehensive studies of microgrids. The structure of the laboratory, including the facilities, configurations, and communication network, is first introduced. The complete Control system is based on a generic hierarchical Control scheme including primary, secondary, and Tertiary Control. Primary Control loops are developed and implemented in digital Control platform, while system supervision, advanced secondary, and Tertiary management are realized in a microgrid central Controller. The software and hardware schemes are described. Several example case studies are introduced and performed to achieve power quality regulation, energy management, and flywheel energy storage system Control. Experimental results are presented to show the performance of the whole system.

  • On the Impact of Wireless Jamming on the Distributed Secondary Microgrid Control
    2016 IEEE Globecom Workshops (GC Wkshps), 2016
    Co-Authors: Pietro Danzi, Cedomir Stefanovic, Lexuan Meng, Josep M. Guerrero, Petar Popovski
    Abstract:

    The secondary Control in direct current microgrids (MGs) is used to restore the voltage deviations caused by the primary droop Control, where the latter is implemented locally in each distributed generator and reacts to load variations. Numerous recent works propose to implement the secondary Control in a distributed fashion, relying on a communication system to achieve consensus among MG units. This paper shows that, if the system is not designed to cope with adversary communication impairments, then a malicious attacker can apply a simple jamming of a few units of the MG and thus compromise the secondary MG Control. Compared to other denial-of-service attacks that are oriented against the Tertiary Control, such as economic dispatch, the attack on the secondary Control presented here can be more severe, as it disrupts the basic functionality of the MG.

  • Hierarchical Control for voltage harmonics compensation in multi-area microgrids
    2015 IEEE 10th International Symposium on Diagnostics for Electrical Machines Power Electronics and Drives (SDEMPED), 2015
    Co-Authors: Mohammad M. Hashempour, Mehdi Savaghebi, Juan C. Vasquez, Josep M. Guerrero
    Abstract:

    In this paper, the power quality of multi-area microgrids is addressed. For this, Active Power Filters (APFs) and Distributed Generators (DGs) inverters are used. To achieve the reference value of power quality indices of different areas, a strategy based on cooperation between DGs and APFs is proposed. Hierarchical Control is applied to Control DGs inverters and APFs in a coordinated way. Primary Control consists of power droop Controller of DGs, selective virtual impedance and voltage/current regulators. Based on the secondary Control, voltage compensation of Points of Common Coupling (PCCs) of multi-area microgrid is carried out by DGs. Voltage compensation of PCCs by DGs may cause violation from maximum allowable voltage distortion at DGs terminals. Thus, Tertiary Control is used to mitigate these violations by using APF in proper coordination with secondary Control. Evaluation of the proposed hierarchical Control is carried out by simulation.

  • ISIE - Agent-based distributed unbalance compensation for optimal power quality in islanded microgrids
    2014 IEEE 23rd International Symposium on Industrial Electronics (ISIE), 2014
    Co-Authors: Lexuan Meng, Mehdi Savaghebi, Juan C. Vasquez, Josep M. Guerrero, Tomislav Dragicevic, Fen Tang
    Abstract:

    In microgrids, the distributed generators (DG) can be used as distributed compensators so as to compensate the voltage unbalances in the critical bus. However, the power quality disturbance in generator sides and local buses may be affected and exceeds the limit. It can be more convenient to implement Tertiary Control so as to adjust the compensation efforts among DGs and ensure the acceptable power quality in local buses. Moreover, as centralized Control methods have certain disadvantages, such as low flexibility, expandability and heavy computation burden, this paper proposes an agent-based distributed hierarchical Control method. Communication links are required between neighboring units. Consensus algorithm and optimization algorithm are implemented in Tertiary Control for global information discovery and local optimal decision-making respectively. The Tertiary Control gives lower level Controller a Tertiary compensation gain to adjust the local DG compensation effort so as to ensure the acceptable power quality in the local bus while keeping the best power quality in critical bus. Simulation results are shown to demonstrate the effectiveness of the method.

Xunwei Yu - One of the best experts on this subject based on the ideXlab platform.

  • System integration and hierarchical power management strategy for a solid-state transformer interfaced microgrid system
    IEEE Transactions on Power Electronics, 2014
    Co-Authors: Xunwei Yu, Xu She, Xijun Ni, Alex Q Huang
    Abstract:

    This paper investigates, and for the first time presents, the system integration of a novel solid-state transformer (SST) interfaced microgrid system. Accordingly, a hierarchical power management strategy is proposed for this system to enable islanding mode operation, SST enabled operation, and the seamless transfer between two modes. The proposed power management strategy includes three Control levels: primary Control for the local Controller; secondary Control for the dc microgrid bus voltage recovery; and Tertiary Control to manage the battery state of charge. The proposed system architecture and Control strategies are detailed in this paper and a lab test bed is constructed to verify the system performance. Finally, several typical case studies are carried out. The experimental results verify the proposed system and distributed power management strategy.

  • Multiple objectives Tertiary Control strategy for solid state transformer interfaced DC microgrid
    2014 IEEE Energy Conversion Congress and Exposition ECCE 2014, 2014
    Co-Authors: Xunwei Yu, Xijun Ni, Alex Huang
    Abstract:

    This paper's investigation is based on a solid state transformer (SST) interfaced DC microgrid (MG) system. Correspondingly, a hierarchical power and energy management strategy is proposed for this system. The proposed power management strategy includes three Control levels: 1) primary Control, distributed Control for system power balance without communication; 2) secondary Control for system seamless switching from islanding mode to SST-enabled mode; 3) Tertiary Control for system energy management. Different from the previous methods, the multiple Control objectives Control is implemented in the Tertiary Control layer. Thus, the Tertiary Control can not only Control the DC MG system output power, but manage the battery state (charge or discharge) in DC MG based on its state of charge (SOC). Lastly, several typical case studies are carried out and the simulation results verify the proposed power and energy management strategy.

  • IECON - Hierarchical power management for DC microgrid in islanding mode and Solid State transformer enabled mode
    IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
    Co-Authors: Xunwei Yu, Alex Q Huang
    Abstract:

    A hierarchical power management scheme is proposed in this paper for a typical DC Microgrid. Different from other Microgrids, the DC Microgrid can interface to the distribution system by Solid-State transformer (SST). The hierarchical power management strategy includes three Control levels: 1) primary Control for DC Microgrid to implement distributed operation 2) secondary Control for the DC Microgrid bus voltage recovery to achieve seamless mode switch 3) Tertiary Control to manage the battery charge and discharge. The DC Microgrid can operate in islanding mode, including the individual Control for distributed renewable energy source (DRER) and distributed energy storage device (DESD). In addition, the DC microgrid can operate in SST-enabled mode to interface to the distribution system. The DC Micorgrid can seamlessly switch between islanding mode and SST-enable mode. The consideration of state of charge (SOC) for battery is also involved into the Tertiary Control. To this end, a lab test-bed is constructed to verify the system performance. Lastly, several typical case studies are carried out and the experimental results verify the proposed power management strategy.

  • Hierarchical power management for DC microgrid in islanding mode and Solid State transformer enabled mode
    IECON Proceedings (Industrial Electronics Conference), 2013
    Co-Authors: Xunwei Yu, Xu She, Alex Huang
    Abstract:

    A hierarchical power management scheme is proposed in this paper for a typical DC Microgrid. Different from other Microgrids, the DC Microgrid can interface to the distribution system by Solid-State transformer (SST). The hierarchical power management strategy includes three Control levels: 1) primary Control for DC Microgrid to implement distributed operation 2) secondary Control for the DC Microgrid bus voltage recovery to achieve seamless mode switch 3) Tertiary Control to manage the battery charge and discharge. The DC Microgrid can operate in islanding mode, including the individual Control for distributed renewable energy source (DRER) and distributed energy storage device (DESD). In addition, the DC microgrid can operate in SST-enabled mode to interface to the distribution system. The DC Micorgrid can seamlessly switch between islanding mode and SST-enable mode. The consideration of state of charge (SOC) for battery is also involved into the Tertiary Control. To this end, a lab test-bed is constructed to verify the system performance. Lastly, several typical case studies are carried out and the experimental results verify the proposed power management strategy.

Alex Q Huang - One of the best experts on this subject based on the ideXlab platform.

  • System integration and hierarchical power management strategy for a solid-state transformer interfaced microgrid system
    IEEE Transactions on Power Electronics, 2014
    Co-Authors: Xunwei Yu, Xu She, Xijun Ni, Alex Q Huang
    Abstract:

    This paper investigates, and for the first time presents, the system integration of a novel solid-state transformer (SST) interfaced microgrid system. Accordingly, a hierarchical power management strategy is proposed for this system to enable islanding mode operation, SST enabled operation, and the seamless transfer between two modes. The proposed power management strategy includes three Control levels: primary Control for the local Controller; secondary Control for the dc microgrid bus voltage recovery; and Tertiary Control to manage the battery state of charge. The proposed system architecture and Control strategies are detailed in this paper and a lab test bed is constructed to verify the system performance. Finally, several typical case studies are carried out. The experimental results verify the proposed system and distributed power management strategy.

  • IECON - Hierarchical power management for DC microgrid in islanding mode and Solid State transformer enabled mode
    IECON 2013 - 39th Annual Conference of the IEEE Industrial Electronics Society, 2013
    Co-Authors: Xunwei Yu, Alex Q Huang
    Abstract:

    A hierarchical power management scheme is proposed in this paper for a typical DC Microgrid. Different from other Microgrids, the DC Microgrid can interface to the distribution system by Solid-State transformer (SST). The hierarchical power management strategy includes three Control levels: 1) primary Control for DC Microgrid to implement distributed operation 2) secondary Control for the DC Microgrid bus voltage recovery to achieve seamless mode switch 3) Tertiary Control to manage the battery charge and discharge. The DC Microgrid can operate in islanding mode, including the individual Control for distributed renewable energy source (DRER) and distributed energy storage device (DESD). In addition, the DC microgrid can operate in SST-enabled mode to interface to the distribution system. The DC Micorgrid can seamlessly switch between islanding mode and SST-enable mode. The consideration of state of charge (SOC) for battery is also involved into the Tertiary Control. To this end, a lab test-bed is constructed to verify the system performance. Lastly, several typical case studies are carried out and the experimental results verify the proposed power management strategy.