In the event of a major power outage,critical park microgrids(PMGs)could be self-sustaining if mobile emergency generators(MEGs)are stationed to share energy.However,the need for privacy protection and the value of fl...In the event of a major power outage,critical park microgrids(PMGs)could be self-sustaining if mobile emergency generators(MEGs)are stationed to share energy.However,the need for privacy protection and the value of flexible power support on minute-time scales have not been given enough attention.To address the problem,this paper proposes a new self-sustaining strategy for critical PMGs integrating MEGs.First,to promote the cooperation between PMG and MEG,a bi-level benefit distribution mechanism is designed,where the participants'multiple roles and contributions are identified,and good behaviors are also awarded.Additionally,to increase the alliance benefits,three loss coordination modes are presented to guide the power exchange at the minute level between the MEG and PMG,considering the volatility of renewable generation and load.On this basis,a multi-time scale power-energy scheduling strategy is formulated via the alternating direction method of multipliers(ADMM)to coordinate the PMG and MEG.Finally,a dimensionality reduction technology is designed to equivalently simplify the optimization problem to facilitate the adaptive-step-based ADMM solution.Simulation studies indicate that the proposed strategy achieves the self-sustaining of PMGs integrating MEGs while increasing the economy by no less than 3.1%.展开更多
This paper investigates stability problem of DC micro-grid under disturbance.Tracking control based on the sampled H∞controller is designed for solving such problem.First,it sets up the model of the DC micro-grid wit...This paper investigates stability problem of DC micro-grid under disturbance.Tracking control based on the sampled H∞controller is designed for solving such problem.First,it sets up the model of the DC micro-grid with the energy storage unit.Next,it presents the model for the closed-loop control system and the design method for the sampled state feedback controller.Then,it gives the sampled H∞performance analysis by considering the sampled quantisation error as an external disturbance term of the system.It derives one sufficient condition for stabilisation of the DC micro-grid based on linear matrix inequalities and Lyapunov theory.Finally,simulations verify the validity of our results.展开更多
With the rapid development of science andtechnology, more and more devices are increasingly demandingtime accuracy and synchronization. In this paper, an FPGA-based GPS positioning and timing information display syste...With the rapid development of science andtechnology, more and more devices are increasingly demandingtime accuracy and synchronization. In this paper, an FPGA-based GPS positioning and timing information display system isdesigned. The GPS timing information acquisition, processing anddisplay program is written in Verilog HDL hardware descriptionlanguage. The design ideas and implementation methods of eachdifferent functional module are expounded. In the actual operationprocess, the system can realize the GPS timing information andthe correct display of the positioning latitude and longitude, andcomplete the UTC time to Beijing time conversion display, whichhas good practicability.展开更多
基金This work was supported by the National Natural Science Foundation of China (61125303), the Program for Science and Technology in Wuhan, China (2014010101010004), the Program for Changjiang Scholars and Innovative Research Team in University of China (IRTt245), China Three Gorges University Science Foundation (KJ2013B020), Hubei Key Laboratory of Cascaded Hydropower Stations Operation and Control Program (2013KJX12), and Hubei Science and Technology Support Program (2015BAA106)
基金supported by the National Natural Science Foundation of China(52307149,52007103)China Postdoctoral Fund(BX20230326)the State Grid of China(520601230003)。
文摘In the event of a major power outage,critical park microgrids(PMGs)could be self-sustaining if mobile emergency generators(MEGs)are stationed to share energy.However,the need for privacy protection and the value of flexible power support on minute-time scales have not been given enough attention.To address the problem,this paper proposes a new self-sustaining strategy for critical PMGs integrating MEGs.First,to promote the cooperation between PMG and MEG,a bi-level benefit distribution mechanism is designed,where the participants'multiple roles and contributions are identified,and good behaviors are also awarded.Additionally,to increase the alliance benefits,three loss coordination modes are presented to guide the power exchange at the minute level between the MEG and PMG,considering the volatility of renewable generation and load.On this basis,a multi-time scale power-energy scheduling strategy is formulated via the alternating direction method of multipliers(ADMM)to coordinate the PMG and MEG.Finally,a dimensionality reduction technology is designed to equivalently simplify the optimization problem to facilitate the adaptive-step-based ADMM solution.Simulation studies indicate that the proposed strategy achieves the self-sustaining of PMGs integrating MEGs while increasing the economy by no less than 3.1%.
基金The work was supported by the Natural Science Foundation of China[grant numbers 61673188,61603212,61761130081 and 61876097]the Foundation for Innovative Research Groups of Hubei Province of China[grant number 2017CFA005]+1 种基金the Fundamental Research Funds for the Central Universities of HUST[grant number 2018KFYXKJC051]the Research Funds for Hubei Key Laboratory of Applied Mathematics(Hubei University).
文摘This paper investigates stability problem of DC micro-grid under disturbance.Tracking control based on the sampled H∞controller is designed for solving such problem.First,it sets up the model of the DC micro-grid with the energy storage unit.Next,it presents the model for the closed-loop control system and the design method for the sampled state feedback controller.Then,it gives the sampled H∞performance analysis by considering the sampled quantisation error as an external disturbance term of the system.It derives one sufficient condition for stabilisation of the DC micro-grid based on linear matrix inequalities and Lyapunov theory.Finally,simulations verify the validity of our results.
文摘With the rapid development of science andtechnology, more and more devices are increasingly demandingtime accuracy and synchronization. In this paper, an FPGA-based GPS positioning and timing information display system isdesigned. The GPS timing information acquisition, processing anddisplay program is written in Verilog HDL hardware descriptionlanguage. The design ideas and implementation methods of eachdifferent functional module are expounded. In the actual operationprocess, the system can realize the GPS timing information andthe correct display of the positioning latitude and longitude, andcomplete the UTC time to Beijing time conversion display, whichhas good practicability.