The Experts below are selected from a list of 360 Experts worldwide ranked by ideXlab platform

Hongbin Sun - One of the best experts on this subject based on the ideXlab platform.

  • optimal distributed control for Secondary frequency and Voltage regulation in an islanded microgrid
    IEEE Transactions on Industrial Informatics, 2019
    Co-Authors: Hongbin Sun
    Abstract:

    This paper proposes an optimal distributed control strategy for the coordination of multiple distributed generators in an islanded microgrid (MG). A finite-time Secondary frequency control approach is developed to eliminate the frequency deviation and maintain accurate active power sharing in a finite-time manner. It is demonstrated that the traditional distributed control approach with asymptotical convergence is just a special case of the proposed finite-time control strategy under the specific control parameter settings. Then, a Secondary Voltage control approach is presented to regulate the average Voltage magnitude of all distributed generators to the desired value and achieve accurate reactive power sharing. The implementation of the proposed distributed control strategy only requires information exchange among neighboring local controllers through a sparse communication network. Simulations with an islanded MG testbed built in MATLAB/Simulink are conducted to validate the effectiveness of the proposed distributed control strategy.

  • a load fluctuation characteristic index and its application to pilot node selection
    Energies, 2014
    Co-Authors: Qinglai Guo, Hongbin Sun, Bin Wang, Boming Zhang
    Abstract:

    The operation of power systems has been complicated by the rapid diversification of loads. Analyzing load characteristics becomes necessary to different utilities in energy management systems to ensure the reliability of power systems. Here, we describe a method of analyzing and quantifying the load characteristics and introduce its application to pilot nodes selection for zone based Voltage control. We propose a new index, the Q-fluctuation (QF), to quantify the load characteristic of reactive power based on an analysis of historical data. A second index, the V-fluctuation (VF), which is a combination of the QF and the Q–V sensitivity that reflects structural information for the grid describes the Voltage deviation at each node. These indices are used to construct the Voltage fluctuation space, which is then used to select the pilot node for each zone. Simulation studies using IEEE 14-bus and 118-bus systems are described, and used to demonstrate the advantages of the proposed method. The method was able to improve the Secondary Voltage control and enhance the grid reliability in response to structural changes.

  • an adaptive zone division based automatic Voltage control system with applications in china
    Power and Energy Society General Meeting, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    Summary form only given. The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • an adaptive zone division based automatic Voltage control system with applications in china
    IEEE Transactions on Power Systems, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but, here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • control method for power plant and transformer station coordination Voltage based on real time update of coordination restraint
    2008
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Wenchuan Wu, Bin Wang
    Abstract:

    The present invention provides a coordinated Voltage control method based on the coordinating and restricting a real-time updating power plant and substation, belonging to power system automatic Voltage control technical field. The invention selects the substation bus as a coordination variable between plants, firstly, each substation is processed with instation automatic Voltage control according to the method of ''Nine zone pictures'', and according to the control result, the constraint condition of the coordination variable of the substation is real-time updated by adopting expert rules method; a constraint condition is added to the coordinated Secondary Voltage control mode of the region to unify solution, reactive power control strategy of the generator is solved. The CSVC mode has no discrete variable, belonging to conventional Secondary planning mode, avoiding the resolving of the problem of the complex mixed integer programming, improving the credibility of the real-time control.

Bin Wang - One of the best experts on this subject based on the ideXlab platform.

  • a load fluctuation characteristic index and its application to pilot node selection
    Energies, 2014
    Co-Authors: Qinglai Guo, Hongbin Sun, Bin Wang, Boming Zhang
    Abstract:

    The operation of power systems has been complicated by the rapid diversification of loads. Analyzing load characteristics becomes necessary to different utilities in energy management systems to ensure the reliability of power systems. Here, we describe a method of analyzing and quantifying the load characteristics and introduce its application to pilot nodes selection for zone based Voltage control. We propose a new index, the Q-fluctuation (QF), to quantify the load characteristic of reactive power based on an analysis of historical data. A second index, the V-fluctuation (VF), which is a combination of the QF and the Q–V sensitivity that reflects structural information for the grid describes the Voltage deviation at each node. These indices are used to construct the Voltage fluctuation space, which is then used to select the pilot node for each zone. Simulation studies using IEEE 14-bus and 118-bus systems are described, and used to demonstrate the advantages of the proposed method. The method was able to improve the Secondary Voltage control and enhance the grid reliability in response to structural changes.

  • an adaptive zone division based automatic Voltage control system with applications in china
    Power and Energy Society General Meeting, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    Summary form only given. The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • an adaptive zone division based automatic Voltage control system with applications in china
    IEEE Transactions on Power Systems, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but, here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • control method for power plant and transformer station coordination Voltage based on real time update of coordination restraint
    2008
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Wenchuan Wu, Bin Wang
    Abstract:

    The present invention provides a coordinated Voltage control method based on the coordinating and restricting a real-time updating power plant and substation, belonging to power system automatic Voltage control technical field. The invention selects the substation bus as a coordination variable between plants, firstly, each substation is processed with instation automatic Voltage control according to the method of ''Nine zone pictures'', and according to the control result, the constraint condition of the coordination variable of the substation is real-time updated by adopting expert rules method; a constraint condition is added to the coordinated Secondary Voltage control mode of the region to unify solution, reactive power control strategy of the generator is solved. The CSVC mode has no discrete variable, belonging to conventional Secondary planning mode, avoiding the resolving of the problem of the complex mixed integer programming, improving the credibility of the real-time control.

Boming Zhang - One of the best experts on this subject based on the ideXlab platform.

  • a load fluctuation characteristic index and its application to pilot node selection
    Energies, 2014
    Co-Authors: Qinglai Guo, Hongbin Sun, Bin Wang, Boming Zhang
    Abstract:

    The operation of power systems has been complicated by the rapid diversification of loads. Analyzing load characteristics becomes necessary to different utilities in energy management systems to ensure the reliability of power systems. Here, we describe a method of analyzing and quantifying the load characteristics and introduce its application to pilot nodes selection for zone based Voltage control. We propose a new index, the Q-fluctuation (QF), to quantify the load characteristic of reactive power based on an analysis of historical data. A second index, the V-fluctuation (VF), which is a combination of the QF and the Q–V sensitivity that reflects structural information for the grid describes the Voltage deviation at each node. These indices are used to construct the Voltage fluctuation space, which is then used to select the pilot node for each zone. Simulation studies using IEEE 14-bus and 118-bus systems are described, and used to demonstrate the advantages of the proposed method. The method was able to improve the Secondary Voltage control and enhance the grid reliability in response to structural changes.

  • an adaptive zone division based automatic Voltage control system with applications in china
    Power and Energy Society General Meeting, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    Summary form only given. The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • an adaptive zone division based automatic Voltage control system with applications in china
    IEEE Transactions on Power Systems, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but, here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • control method for power plant and transformer station coordination Voltage based on real time update of coordination restraint
    2008
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Wenchuan Wu, Bin Wang
    Abstract:

    The present invention provides a coordinated Voltage control method based on the coordinating and restricting a real-time updating power plant and substation, belonging to power system automatic Voltage control technical field. The invention selects the substation bus as a coordination variable between plants, firstly, each substation is processed with instation automatic Voltage control according to the method of ''Nine zone pictures'', and according to the control result, the constraint condition of the coordination variable of the substation is real-time updated by adopting expert rules method; a constraint condition is added to the coordinated Secondary Voltage control mode of the region to unify solution, reactive power control strategy of the generator is solved. The CSVC mode has no discrete variable, belonging to conventional Secondary planning mode, avoiding the resolving of the problem of the complex mixed integer programming, improving the credibility of the real-time control.

C A Nucci - One of the best experts on this subject based on the ideXlab platform.

  • synchrophasors based distributed Secondary Voltage var control via cellular network
    Power and Energy Society General Meeting, 2017
    Co-Authors: Alberto Borghetti, Riccardo Bottura, Marina Barbiroli, C A Nucci
    Abstract:

    The impact of the increasing connection of distributed generation to medium Voltage (MV) feeders, with particular reference to photovoltaic (PV) units, justifies the investigation on Secondary Voltage/VAR control (VVC) schemes able to improve the utilization of available control resources and to reduce reactive power flows. The paper deals with a Secondary VVC scheme based on a distributed multi-agent approach that requires only the estimation of the reactive power flows between the buses where the PV units with reactive power control capability are connected. Phasor Measurement Units (PMUs) are used to get the relevant information. In general, distributed control approaches are expected to work adequately even by using communication infrastructures with lower performances than those required by centralized approaches. The paper addresses such an issue by the analysis of the distributed VVC performance when a shared cellular network is used for the cooperative adjustment of PV inverters reactive power outputs and of tap positions of transformers equipped with on-load tap changers. The analysis is carried out by using a specifically developed ICT (Information and Communications Technology)-power co-simulation platform. It is shown that the VVC scheme has adequate performances also in the presence of significant levels of background traffic and data loss.

  • synchrophasors based distributed Secondary Voltage var control via cellular network
    IEEE Transactions on Smart Grid, 2017
    Co-Authors: Alberto Borghetti, Riccardo Bottura, Marina Barbiroli, C A Nucci
    Abstract:

    The impact of the increasing connection of distributed generation to medium Voltage feeders, with particular reference to photovoltaic (PV) units, justifies the investigation on Secondary Voltage/VAR control (VVC) schemes able to improve the utilization of available control resources and to reduce reactive power flows. This paper deals with a Secondary VVC scheme based on a distributed multi-agent approach that requires only the estimation of the reactive power flows between the buses, where the PV units with reactive power control capability are connected. Phasor measurement units are used to get the relevant information. In general, distributed control approaches are expected to work adequately even by using communication infrastructures with lower performances than those required by centralized approaches. This paper addresses such an issue by the analysis of the distributed VVC performance when a shared cellular network is used for the cooperative adjustment of PV inverters reactive power outputs and of tap positions of transformers equipped with on-load tap changers. The analysis is carried out by using a specifically developed information and communications technology-power co-simulation platform. It is shown that the VVC scheme has adequate performances also in the presence of significant levels of background traffic and data loss.

Qinglai Guo - One of the best experts on this subject based on the ideXlab platform.

  • a load fluctuation characteristic index and its application to pilot node selection
    Energies, 2014
    Co-Authors: Qinglai Guo, Hongbin Sun, Bin Wang, Boming Zhang
    Abstract:

    The operation of power systems has been complicated by the rapid diversification of loads. Analyzing load characteristics becomes necessary to different utilities in energy management systems to ensure the reliability of power systems. Here, we describe a method of analyzing and quantifying the load characteristics and introduce its application to pilot nodes selection for zone based Voltage control. We propose a new index, the Q-fluctuation (QF), to quantify the load characteristic of reactive power based on an analysis of historical data. A second index, the V-fluctuation (VF), which is a combination of the QF and the Q–V sensitivity that reflects structural information for the grid describes the Voltage deviation at each node. These indices are used to construct the Voltage fluctuation space, which is then used to select the pilot node for each zone. Simulation studies using IEEE 14-bus and 118-bus systems are described, and used to demonstrate the advantages of the proposed method. The method was able to improve the Secondary Voltage control and enhance the grid reliability in response to structural changes.

  • an adaptive zone division based automatic Voltage control system with applications in china
    Power and Energy Society General Meeting, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    Summary form only given. The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • an adaptive zone division based automatic Voltage control system with applications in china
    IEEE Transactions on Power Systems, 2013
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Bin Wang
    Abstract:

    The power industry in China has grown significantly over the past decade, spurring the adoption of system-wide automatic Voltage control (AVC) technology to meet stricter requirements for security and economical power system operation. To cope with the rapidly developing and frequently changing Chinese power grid, an AVC scheme based on adaptive zone division is introduced in this paper. Logically, this type of system has a three-level hierarchical structure, but, here, both Secondary Voltage control (SVC) and tertiary Voltage control (TVC) are implemented via software at the same control center. The control zones are no longer fixed but are reconfigured online and updated in accordance with variations in the grid structure. The technical details of these procedures are presented here. The implementation of TVC (which is based on an online reactive optimal power flow) and SVC are also discussed, together with some technical details on improvements to their reliability and robustness. Some results obtained from field-site applications based on similar-days testing rather than simulations are employed to evaluate the performance and improvements of the AVC system. This system has been installed at over 20 control centers in China.

  • control method for power plant and transformer station coordination Voltage based on real time update of coordination restraint
    2008
    Co-Authors: Hongbin Sun, Qinglai Guo, Boming Zhang, Wenchuan Wu, Bin Wang
    Abstract:

    The present invention provides a coordinated Voltage control method based on the coordinating and restricting a real-time updating power plant and substation, belonging to power system automatic Voltage control technical field. The invention selects the substation bus as a coordination variable between plants, firstly, each substation is processed with instation automatic Voltage control according to the method of ''Nine zone pictures'', and according to the control result, the constraint condition of the coordination variable of the substation is real-time updated by adopting expert rules method; a constraint condition is added to the coordinated Secondary Voltage control mode of the region to unify solution, reactive power control strategy of the generator is solved. The CSVC mode has no discrete variable, belonging to conventional Secondary planning mode, avoiding the resolving of the problem of the complex mixed integer programming, improving the credibility of the real-time control.