检索结果-内蒙古大学图书馆

distributed predefined-time secondary control under directed networks for DC microgrids

APPLIED ENERGY 2024年 374卷

作者： Chang, Shaoping Wang, Canfeng Luo, Xiaoyuan Guan, Xinping Yanshan Univ Sch Elect Engn Qinhuangdao 066004 Peoples R China Shanghai Jiao Tong Univ Dept Automat Shanghai 200240 Peoples R China

DC microgrids (MGs) have gained significant attention due to their ability to complement renewable energy generation. In order to improve the operational stability of DC MGs, a predefined-time-based secondary controller is proposed to restore voltage drops caused by droop control and achieve current allocation among agents according to expected ratios. To conserve communication resources, the communication topology is established as a directed network. Each distributed generator (DG) receives voltage and current information from neighboring devices and uses its own current and voltage regulators to achieve control objectives. Compared to existing controllers, the convergence time upper bound of the proposed approach is independent of the initial value and can be directly adjusted as a parameter. The stability of the proposed control strategy is then verified using Lyapunov theory. Finally, hardware-in-loop test results are conducted to validate the performance of the control strategy, and its superiority is demonstrated through comparison with existing control methods.

关键词： DC microgrids (MGs) Predefined-time control Scaled consensus distributed secondary control Directed networks

来源：评论

学校读者我要写书评

暂无评论

A distributed Event-Triggered Fixed-Time secondary control for DC Microgrids Without Continuous Signal Transmission

引用

IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS 2024年第5期12卷 5123-5138页

作者： Chai, Junwei Wang, Minghao Xu, Zhao Hong Kong Polytech Univ Dept Elect & Elect Engn Hong Kong Peoples R China Univ Macau Dept Elect & Comp Engn State Key Lab Internet Things Smart City Zhuhai 999078 Peoples R China

DC microgrids, as an emerging and reliable grid system, are widely applied to accommodate ever-increasing distributed generators (DGs). To achieve the effective orchestration of integrated DGs and satisfy the elevated performance expectations for the overall system, the deployment of an enhanced secondary control strategy with rapid response dynamics while substantially reducing communication requirements is crucial. To accomplish this goal, a distributed event-triggered fixed-time secondary control scheme is proposed to achieve a concurrent dc bus voltage regulation and current sharing among DGs within a fixed time. Moreover, the event-triggered communication mechanism is designed, and each DG only needs to send one latest variable value to its neighbors when the designed event-triggering conditions are fulfilled, contributing to reduced communication. Remarkably, this method can eliminate the need for bus voltage sampling, facilitating a low-cost implementation and enhanced system reliability. The stability of the proposed strategy is rigorously proved, and the avoidance of the Zeno behavior is also certified. Simulation and experimental results are presented to substantiate the efficacy of the proposed strategy.

关键词： Current sharing dc microgrid distributed secondary control event-triggered control fixed-time control

来源：评论

学校读者我要写书评

暂无评论

distributed Privacy-Preserving secondary control for DC Microgrids via State Decomposition

引用

IEEE TRANSACTIONS ON SUSTAINABLE ENERGY 2024年第2期15卷 726-734页

作者： Yuan, Qi-Fan Wang, Yan-Wu Liu, Xiao-Kang Liu, Zhi-Wei Huazhong Univ Sci & Technol Sch Artificial Intelligence & Automat Key Lab Image Proc & Intelligent Control Wuhan 430074 Peoples R China

In this article, a distributed secondary controller is proposed for an islanded DC microgrid to preserve privacy information of the local power sources, while achieving current sharing among the generators and voltage regulation of the DC bus. Based on the state decomposition mechanism, the original secondary control signal of each generator is decomposed into two parts: one takes over the role of communicating with neighbors, while the other affects the evolution of the former one and is invisible to the neighbors. Besides, random noises are introduced to mask the true value of the transmitted signals. Under the proposed controller, the current data of the local generators can be kept confidential, as well as the associated privacy power information. In this way, the power security risks caused by privacy information leakage can be avoided. Lastly, both simulation and experiment tests are imposed to verify the effectiveness of the proposed control scheme.

关键词： Privacy Microgrids Voltage control Generators Power control Matrix converters Security DC microgird distributed secondary control privacy preservation state decomposition current sharing voltage regulation

来源：评论

学校读者我要写书评

暂无评论

Flexible linear clock-based distributed self-triggered active power-sharing secondary control of AC microgrids

引用

Global Energy Interconnection 2024年第6期7卷 786-797页

作者： Yulin Chen Xing Huang Guangxin Zhi Shaohua Yang Hongxun Hui Donglian Qi Yunfeng Yan Fengkai Gao Key Laboratory of Modern Power System Simulation and Control&Renewable Energy Technology Ministry of Education(Northeast Electric Power University)Jilin132012P.R.China Hainan Institute Zhejiang UniversitySanya572000P.R.China College of Electrical Engineering Zhejiang UniversityHangzhou310027P.R.China State Key Laboratory of Internet of Things for Smart City University of MacaoMacao999078P.R.China

Traditional active power sharing in microgrids,achieved by the distributed average consensus,requires each controller to continuously trigger and communicate with each other,which is a wasteful use of the limited computation and communication resources of the secondary *** enhance the efficiency of secondary control,we developed a novel distributed self-triggered active power-sharing control strategy by introducing the signum function and a flexible linear *** continuous communication–based controllers,the proposed self-triggered distributed controller prompts distributed generators to perform control actions and share information with their neighbors only at specific time instants monitored by the linear ***,this approach results in a significant reduction in both the computation and communication ***,this design naturally avoids Zeno ***,a modified triggering condition was established to achieve further reductions in computation and *** simulation results confirmed that the proposed control scheme achieves distributed active power sharing with very few controller triggers,thereby substantially enhancing the efficacy of secondary control in MGs.

关键词： Active power sharing distributed secondary control Self-triggered mechanism AC microgrid control efficiency

来源：评论

学校读者我要写书评

暂无评论

Fixed-time control of distributed secondary voltage and frequency for microgrids considering state-constrained

引用

ELECTRICAL ENGINEERING 2024年第3期106卷 2637-2649页

作者： Wu, Zhongqiang Cheng, Hongqiang Yanshan Univ Key Lab Ind Comp Control Engn Qinhuangdao Hebei Peoples R China

The fixed time control problem for the secondary voltage and frequency of islanded AC microgrids is studied. Based on the multi-agent consensus method, an adaptive fuzzy fixed-time secondary voltage controller considering state constraints and the secondary frequency controller based on control barrier function are proposed. In multi-agent consensus control, each distributed generation is regarded as a nonlinear agent, and the agents communicate with each other through a sparse network. In designing the voltage controller, the adaptive fuzzy estimation of the unknown variables after feedback linearization is used to improve the adaptive ability of the controller and a new sliding mode surface is introduced to make the voltage converge in fixed time. Considering the problem of system state constraints, the barrier Lyapunov function and the control barrier function are used to design the voltage and frequency controllers respectively, so that the system state is within the preset constraint range. The sharing of active power and reactive power is also considered. A proof about fixed time convergence and stability is given. Under the environment of MATLAB/SimPowerSystem, the effectiveness of the proposed controller is verified by the simulation about the load variations and large disturbance of microgrids.

关键词： Microgrids Fixed time Barrier Lyapunov function Adaptive fuzzy estimation distributed secondary control

来源：评论

学校读者我要写书评

暂无评论

distributed Model-Based Predictive secondary control for Hybrid AC/DC Microgrids

引用

IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS 2023年第1期11卷 627-642页

作者： Rute-Luengo, Erwin Navas-Fonseca, Alex Gomez, Juan S. S. Espina, Enrique Burgos-Mellado, Claudio Saez, Doris Sumner, Mark Munoz-Carpintero, Diego Univ Chile Dept Elect Engn Santiago 8370451 Chile Univ Nottingham Power Elect Machines & Control Grp Nottingham NG7 2RD England Pontificia Univ Catolica Chile Santiago 7820436 Chile Univ Santiago Chile Dept Elect Engn Santiago 9170124 Chile Univ OHiggins Inst Engn Sci Rancagua 2841959 Chile Inst Sistemas Complejos Ingn Santiago 8370451 Chile Univ Nottingham Power Elect Machines & Control PEMC Grp Nottingham NG7 2RD England

This article presents a novel scheme based on distributed model-based predictive control for the secondary level control of hybrid ac/dc microgrids (MGs). Prediction models based on droop control and power-transfer equations are proposed to characterize the generators in both the ac and dc sub-MGs, whereas power balance constraints are used to predict the behavior of interlinking converters. The operational constraints (such as powers and control action limits) are included in all the formulations. Experimental results validate the proposed scheme for the following cases: 1) load changes, working within operating constraints;2) managing frequency regulation in the ac sub-MG, voltage regulation in the dc sub-MG, and global power consensus in the whole hybrid MG;and 3) maintaining the MG performance in the presence of communication malfunction while ensuring that plug-and-play capability is preserved.

关键词： Voltage control Hybrid power systems Microgrids Predictive models Frequency control Power electronics Generators distributed secondary control hybrid AC DC microgrids (MGs) MGs predictive control

来源：评论

学校读者我要写书评

暂无评论

distributed event-triggered multi-timer synchronization scheme for secondary control in islanded microgrids

引用

INTERNATIONAL JOURNAL OF ELECTRICAL POWER & ENERGY SYSTEMS 2022年 135卷 107511-107511页

作者： Lou, Guannan Hong, Yinqiu Gu, Wei Xie, Jihua Southeast Univ Sch Elect Engn Jiangsu Prov Key Lab Smart Grid Technol & Equipme Nanjing Jiangsu Peoples R China Southeast Univ Sch Elect Engn Nanjing 210096 Peoples R China

Consensus-based distributed control has been widely applied in the secondary control for microgrids (MGs) with the assumption that the control actions of each distributed generations (DGs) are triggered at the same time as others in the state-of-art literature. However, in the absence of centralized timer synchronization, the asynchrony resulting from the independent timer localized in each DG would inevitably undermine the system performance or even cause instability. This paper proposes a distributed time synchronization strategy to guarantee the update actions of individual DGs to be triggered at the same discrete instants. First, the asynchrony problem in the distributed secondary control due to the essential distributed characteristic is elaborated and the resultant convergence deviation is deduced. Then, the distributed time synchronization strategy based on pinning consensus is described, with the optimal pinning timer selected to achieve superior propagation performance. Further, the event-triggered mechanism is introduced, which reduces the communication burden significantly compared to the time-driven mode and maintains the global clock synchronization efficiently. The selection of event triggering threshold is formulated for the tradeoff between the trigger frequency and convergence accuracy. The effectiveness as well as flexibility of the proposed control strategy is demonstrated by simulations.

关键词： Consensus principle distributed secondary control Event-triggered Microgrid Multi-timer synchronization

来源：评论

学校读者我要写书评

暂无评论

distributed Fixed-Time secondary control for DC Microgrid with Less Information Exchange 8

Distributed Fixed-Time Secondary Control for DC Microgrid wi...

引用

8th International Conference on Power and Renewable Energy, ICPRE 2023

作者： Chai, Junwei Lyu, Xue Wang, Minghao Xu, Zhao Department of Electrical and Electronic Engineering HongKong Hong Kong The Hong Kong Polytechnic University Department of Electrical and Electronic Engineering HongKong Hong Kong

ISBN: (纸本)9798350328813

DC microgrids are a feasible grid system to host multiple distributed generators (DGs). In terms of the control and coordination of hosted DGs, it is required that the integrated secondary control scheme of DC microgrids can achieve fast dynamics. To fulfill this target, a novel fixed-time secondary control scheme is put forward in this paper to achieve a concurrent DC bus voltage regulation and current sharing among DGs within a fixed time. Notably, the proposed method only needs to transmit one variable to the neighboring DGs, which can considerably reduce the communication traffic compared to the existing latest method. Moreover, this control scheme need not sample the DC bus voltage, benefiting an easier implementation and improved system reliability. The stability of the proposed scheme is theoretically proved. The results of studied cases are provided to demonstrate the effectiveness of the proposed strategy. © 2023 IEEE.

关键词： Current sharing DC microgrid distributed secondary control fixed-time stability

来源：评论

学校读者我要写书评

暂无评论

distributed periodic event-triggered secondary control for islanded microgrids with switching topologies and communication delays

引用

ELECTRIC POWER SYSTEMS RESEARCH 2024年 234卷

作者： Huang, Wenchao Tang, Liang Chen, Shaobin Huang, Yanwei FuZhou Univ Coll Elect Engn & Automat Fuzhou 350108 Peoples R China

With the application of distributed generators (DGs), microgrids (MGs) have gained much attention. Combined with the distributed communication of networked systems, we investigates the secondary restoration problem in islanded microgrids. The periodic event -triggered (PET) controllers are designed for voltage restoration and frequency restoration with accurate active power allocation, which can naturally avoid Zeno behavior. By means of a common Lyapunov function, a PET protocol is designed that requires only the information of neighbors for event detection. Both event -checking sampling period and event trigger parameter are taken into account to reduce computation and communication redundancy by choosing appropriate parameters. Furthermore, considering the effect of communication delay, sufficient conditions are given to accomplish the secondary control objectives with allowable delays. Switching topologies are considered in an extra discussion. Finally, the effectiveness of the proposed PET control strategies is verified by several MATLAB simulations.

关键词： Event-triggered control distributed secondary control Islanded microgrid Communication delays Switching topologies

来源：评论

学校读者我要写书评

暂无评论

distributed Sliding Mode Observer-Based secondary control for DC Microgrids Under Cyber-Attacks

引用

IEEE JOURNAL ON EMERGING AND SELECTED TOPICS IN CIRCUITS AND SYSTEMS 2021年第1期11卷 144-154页

作者： Jiang, Yajie Yang, Yun Tan, Siew-Chong Hui, Shu Yuen Univ Hong Kong Dept Elect & Elect Engn Hong Kong Peoples R China Hong Kong Polytech Univ Dept Elect Engn Hong Kong Peoples R China Imperial Coll London Dept Elect & Elect Engn London SW7 2AZ England

The conventional distributed secondary control is widely adopted for distributed energy resources (DERs) in DC microgrids to achieve bus voltage restorations and output current/power sharing. However, when the DER systems are under cyber-attacks, the control variables of the conventional distributed secondary control will deviate from the nominal parameters and the stability of entire DC microgrids may not be guaranteed anymore. To this end, a distributed sliding mode observer (DSMO)-based secondary control is proposed in this paper. Based on local and neighboring measurements, the DSMO initially detects the false signals. Then, the estimated false signals are compensated by the control variables of the secondary control to eliminate the adverse impact. The stability of DSMO is verified by the convergence of the state variables. Both simulation and experimental results have validated that the proposed DSMO-based secondary control can effectively regulate the DER systems to track the bus voltage references and the desired output current/power under various types of cyber-attacks.

关键词： Microgrids Voltage control Observers Stability criteria Hardware Circuits and systems Circuit stability distributed sliding mode observer (DSMO) distributed secondary control cyber-attacks distributed energy resource (DER) DC microgrid

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：