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Group-Consensus of Hierarchical Containment Control for Linear Multi-Agent Systems

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IEEE/CAA Journal of Automatica Sinica 2023年第6期10卷 1462-1474页

作者： Jingshu Sang dazhong ma Yu Zhou the College of Information Science and Engineering Northeastern UniversityShenyang 110004China

The existing containment control has been widely developed for several years, but ignores the case for large-scale cooperation. The strong coupling of large-scale networks will increase the costs of system detection and maintenance. Therefore, this paper is concerned with an extensional containment control issue, hierarchical containment control. It aims to enable a multitude of followers achieving a novel cooperation in the convex hull shaped by multiple leaders. Firstly, by constructing the three-layer topology, large-scale networks are decoupled. Then,under the condition of directed spanning group-tree, a class of dynamic hierarchical containment control protocol is designed such that the novel group-consensus behavior in the convex hull can be realized. Moreover, the definitions of coupling strength coefficients and the group-consensus parameter in the proposed dynamic hierarchical control protocol enhance the adjustability of systems. Compared with the existing containment control strategy, the proposed hierarchical containment control strategy improves dynamic control performance. Finally, numerical simulations are presented to demonstrate the effectiveness of the proposed hierarchical control protocol.

关键词： Group-consensus behavior hierarchical containment control linear multi-agent systems three-layer topology

The Initial Guess Estimation Newton Method for Power Flow in Distribution Systems

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IEEE/CAA Journal of Automatica Sinica 2017年第2期4卷 231-242页

作者： Qiuye Sun Ling Liu dazhong ma Huaguang Zhang School of Information Science and Engineering Northeastern University School of College of Science Northeastern University IEEE Key Laboratory of Integrated Automation of Process Industry (Northeastern University) of the National Education Ministry

With the increasing integration of distributed generations U+0028 DGs U+0029, there is a demand for DGs to play a more important role on the voltage regulation. Meanwhile, the high penetration of DGs could raise a technical problem that the distribution system may operate with bi-directional power flow, leading to the inadequacy of the traditional power flow. Considering this new scenario in distribution system power flow, the convergence theorem is proposed, which contributes to develop a novel selection method of the initial guess closed to the convergent solution. Moreover, to ensure the fast rate of power flow convergence, the theorem of the maximum iterations estimation is also proposed. Based on the two proposed theorems, an Initial Guess Estimation Newton method is proposed, considering different operational status of DGs and initial guess sensitivity simultaneously. Based on the standard node systems, Tongliao grid, and 69 system of USA, three simulation examples are provided to illustrate the effectiveness of the proposed method. © 2017 Chinese Association of Automation.

关键词： Distributed power generation Iterative methods Newton Raphson method Voltage regulators

Exponential-function-based droop control for islanded microgrids

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Journal of Modern Power Systems and Clean Energy 2019年第4期7卷 899-912页

作者： Rui WANG Qiuye SUN Yonghao GUI dazhong ma College of Information Science and Engineering Northeastern UniversityShenyangChina Department of Electronic Systems Aalborg UniversityAalborgDenmark

An exponential-function-based droop control strategy for the distributed energy resources(DERs)is proposed to reduce the reactive power-sharing deviation,limit the minimum value of frequency/voltage,whilst improving the utilization rate of renewable *** DERs and loads are interconnected to achieve a power exchange by converters,where the power management system should accurately share the active/reactive power ***,the proportional reactive power sharing often deteriorates due to its dependence on the line ***,an exponential-function-based droop control is proposed to(1)prevent voltage and frequency from falling to the lower restraint,(2)achieve accurate reactive power sharing,(3)eliminate communication and improve the usage ratio of renewable ***,its stability is analyzed,and the application in islanded AC/DC hybrid microgrids is investigated to achieve the bidirectional power *** simulation and experimental results show that the reactive power sharing deviation can be reduced,and the utilization rate of renewable energy is improved by using the proposed ***,the simulation results illustrate that the system can maintain stable operation when the microgrid is switched from one supplied energy operation condition to another absorbed one.

关键词： Distributed energy resources(DERs) Reactive power-sharing Droop control Bidirectional power flow

Adaptive Dead-Time Modulation Scheme for Bidirectional LLC Resonant Converter in Energy Router

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CSEE Journal of Power and Energy Systems 2024年第4期10卷 1710-1721页

作者： Chenghao Sun Qiuye Sun Rui Wang Yuyang Li dazhong ma College of Information Science and Engineering Northeastern UniversityShenyang 110819China

Although the dead-time optimization design of resonant converters has been widely researched,classical design methods focus more on achieving zero-voltage switching(ZVS)*** body diode loss is always ignored,which results in low-efficiency of the converter,especially,in energy router(ER).To deal with this problem,this paper proposes an adaptive deadtime modulation scheme for bidirectional LLC resonant converters in ***,the power loss of the MOSFET is analyzed based on the ***,a novel dead-time optimization modulation principle is *** can eliminate the body diode loss of MOSFET compared with existing *** on the optimization modulation principle,this paper proposes an adaptive dead-time modulation *** this end,the converter adopting the scheme no longer needs to calculate dead-time,which simplifies the parameter design ***,this scheme enables dead-time to dynamically change with working conditions according to the dead-time optimization modulation *** these effects,the ZVS operation is achieved,and the body diode loss of MOSFET is also ***,a digital implementation method is designed to make the proposed modulation scheme have fast-transient ***,experimental results show that the proposed dead-time modulation scheme enables converters to achieve ZVS operation in all working conditions,and has higher efficiency than classical dead-time design methods.

关键词： Adaptive modulation bidirectional LLC body diode loss dead-time energy router ZVS

A Smart Charging Algorithm Based on a Fast Charging Station Without Energy Storage System

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CSEE Journal of Power and Energy Systems 2021年第4期7卷 850-861页

作者： Qifu Cheng Lei Chen Qiuye Sun Rui Wang dazhong ma Dehao Qin College of Information Science and Engineering Northeastern UniversityShenyang 110819China Ningxia Electric Power Research Institute of State Grid Yinchuan 750001China

With the growing popularity of electric vehicles(EV),there is an urgent demand to solve the stress placed on grids caused by the irregular and frequent access of *** traditional direct current(DC)fast charging station(FCS)based on a photovoltaic(PV)system can effectively alleviate the stress of the grid and carbon emission,but the high cost of the energy storage system(ESS)and the under utilization of the grid-connected interlinking converters(GIC)are not very well *** this paper,the DC FCS architecture based on a PV system and ESS-free is first proposed and employed to reduce the ***,the proposed smart charging algorithm(SCA)can fully coordinate the source/load properties of the grid and EVs to achieve the maximum power output of the PV system and high utilization rate of GICs in the absence of ESS support for *** contains a self-regulated algorithm(SRA)for EVs and a grid-regulated algorithm(GRA)for *** the DC bus voltage change caused by power fluctuations does not exceed the set threshold,SRA readjusts the charging power of each EV through the status of the charging(SOC)feedback of the EV,which can ensure the power rebalancing of the *** GRA would participate in the adjustment process once the DC bus voltage is beyond the set threshold *** the condition of ensuring the charging power of all EVs,a GRA based on adaptive droop control can improve the utilization rate of *** last,the simulation and experimental results are provided to verify the effectiveness of the proposed SCA.

关键词： Energy storage system-free fast charging station hybrid power supply system multiple operation mode smart charging algorithm

Adaptive Bidirectional Droop Control for Electric Vehicles Parking with Vehicle-to-grid Service in Microgrid

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CSEE Journal of Power and Energy Systems 2020年第4期6卷 793-805页

作者： Dehao Qin Qiuye Sun Rui Wang dazhong ma Menglin Liu Clemon University South Carolina29407USA Northeastern University Liaoning 110819China

With the popularity of electric vehicles(EVs),a large number of EVs will become a burden to the future grid with arbitrary charging *** is of vital significance to the control of the EVs charging and discharging state appropriately to enable the EVs to become friendly to the ***,considering the potential for EVs seen as energy storage devices,this paper proposes a multiport DC-DC solid state transformer topology for bidirectional photovoltaic/battery-assisted EV parking lot with vehicle-to-grid service(V2G-PVBP).Relying on the energy storage function of EVs,V2G-PVBP is able to not only satisfy the normal requirements of EVs’owner,but also provide the function of load shifting and load regulation to the *** this paper,EVs are categorized into limited EV and freedom *** EVs are always kept in charging state and freedom EVs can take part in the load regulation of the *** proposed adaptive bidirectional droop control is designed for freedom EVs to make them autonomously charge or discharge with certain power which according to each EV’s state of charge,battery capacity,leaving time,and other factors to maintain the stability of the future ***,the simulation and experiment of the adaptive bidirectional droop control based V2G-PVBP are provided to prove the availability of V2G-PVBP.

关键词： Adaptive bidirectional droop control DC-DC multiport microgrid parking lot solid-state transformer V2G

Abnormal Detection Method of Refined Products Pipeline Working State Based on Multi-stage Decision 36

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Abnormal Detection Method of Refined Products Pipeline Worki...

第36届中国控制会议

作者： Xuguang Hu Zhiqiang Yao dazhong ma Qiuye Sun Huaguang Zhang College of Information Science and Engineering Northeastern University China Academy of Safety Science and Technology

ISBN: (纸本)9781538629185

An abnormal detection method is proposed for promotion of efficiency of state assessment because pipeline working state is judged by equipments status and oil *** on pipeline intellectualization,the pipeline data model is built rely on pipeline ***,the spectral analysis of random matrix is used to analyze data matrix containing multivariable time *** distance indicator between eigenvalues of data matrix and zero is constructed in order to detect the abnormal state of *** the abnormal state happened,the pressure data model is used to decide if the pipeline working state is *** to the proposed data matrix processing method,the abnormal state of pipeline could be found *** simulations show the effective and good performance of the proposed method.

关键词： Refined Products Pipeline Abnormal Detection Spectral Analysis

来源： cnki会议评论

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基于复合式PSO的光伏最大功率点跟踪控制

红外与激光工程 2015年第12期44卷 3801-3806页

作者：马大中翟小军孙秋野东北大学信息科学与工程学院辽宁沈阳110004

针对不均匀光照条件下光伏阵列的MPPT跟踪控制问题,提出了基于粒子群的复合式MPPT控制算法。复合式PSO-MPPT控制算法包括离线寻优和在线寻优两个部分。离线寻优环节采用相邻粒子信息交换机制加强了在寻优过程中的收敛性以及对关键区域... 详细信息

针对不均匀光照条件下光伏阵列的MPPT跟踪控制问题,提出了基于粒子群的复合式MPPT控制算法。复合式PSO-MPPT控制算法包括离线寻优和在线寻优两个部分。离线寻优环节采用相邻粒子信息交换机制加强了在寻优过程中的收敛性以及对关键区域的搜索力度;在线寻优环节采用适应度模糊判断的方法解决了粒子群算法在线工作时扰动大、耗时长的问题。复合式PSOMPPT控制算法将离线和在线的优化方法结合到一起,弥补了各自方法的不足。与传统的方法相比,所提出的方法具有更快的响应速度和更高寻优精度。最后通过matlab仿真证明了所提出的算法可以实现在不均匀光照条件下的最大功率点跟踪。

关键词：最大功率点跟踪粒子群优化复合控制不均匀光照

Research on the Soft-Switching of Solid-State Transformer End-Side

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Research on the Soft-Switching of Solid-State Transformer En...