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Distributed Economic Model Predictive Load Frequency Control for the Multiarea Interconnected Power System With WTs 有风电机组的多区域互联电力系统的分布式经济模型预测性负载频率控制
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-11 DOI: 10.1109/JSYST.2024.3423489
Miaomiao Ma;Jing Cui;Xiangjie Liu;Kwang Y. Lee
This article considers the distributed economic model predictive control (DEMPC) scheme for addressing the load frequency control problem in a multiarea interconnected power system with wind turbines. The system is divided into multiple dynamically coupled subsystems, each subjected to state and control input constraints due to safety concerns. The overall optimal control problem is decomposed into several local optimal control problems based on the local information of each subsystem, meaning each area designs its own local DEMPC controller. Within this framework, the future state trajectories of neighboring subsystems are estimated from the transmitted information between neighbors. To enhance overall economic benefits, the economic stage cost, including load frequency regulation cost, fuel consumption cost, and wind generation cost, is incorporated into the cost function. Simulation results and analysis under different scenarios demonstrate potential improvements in computational burden, economic performance, and robustness of the designed DEMPC controller.
本文探讨了分布式经济模型预测控制(DEMPC)方案,以解决带风力涡轮机的多区域互联电力系统中的负载频率控制问题。该系统分为多个动态耦合子系统,出于安全考虑,每个子系统都受到状态和控制输入约束。根据每个子系统的本地信息,整体最优控制问题被分解为多个本地最优控制问题,这意味着每个区域都要设计自己的本地 DEMPC 控制器。在此框架内,相邻子系统的未来状态轨迹是通过相邻子系统之间的传输信息估算出来的。为提高整体经济效益,经济阶段成本(包括负载频率调节成本、燃料消耗成本和风力发电成本)被纳入成本函数。不同场景下的仿真结果和分析表明,所设计的 DEMPC 控制器在计算负担、经济性能和鲁棒性方面都有潜在的改进空间。
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引用次数: 0
IEEE Systems Journal Information for Authors IEEE 系统期刊作者信息
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-11 DOI: 10.1109/JSYST.2024.3428031
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引用次数: 0
IEEE Systems Journal Publication Information IEEE 系统期刊出版信息
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-11 DOI: 10.1109/JSYST.2024.3427905
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引用次数: 0
A Hybrid Method for Fast Rotor-Angle Stability Assessment 快速评估转子角度稳定性的混合方法
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-09 DOI: 10.1109/JSYST.2024.3446825
Mohamed Ramadan Younis;Reza Iravani
This article proposes a novel hybrid time-domain and direct stability method for rotor-angle stability assessment, aiming to improve the efficiency of existing approaches. The proposed method enables faster detection of both small-signal and transient stability scenarios while extending the applications of the classical stability direct methods to multiswing stability analysis. Unlike the conventional direct methods that rely on the overall system energy, the proposed approach calculates the system's critical energy using the critical apparatus energies, facilitating multiswing stability analysis. Key contributions of this work include the introduction of a new metric, termed “the time to instability,” which allows for the prediction of separation or islanding areas during disturbances. Additionally, the proposed method can rank all apparatus in a power system based on their criticality during small or large disturbances. Also, a stopping condition for the time-domain simulation is provided, reducing algorithm execution time and rendering it suitable for real-time or near-real-time application of dynamic security assessment. The proposed method is tested with multiple stability scenarios and the four possible stability scenarios are presented in this article using the IEEE 16-machine 68-bus power system. The results demonstrate the high accuracy of the proposed approach in identifying the critical apparatus and assessing first- and multirotor-anglestability in power systems.
为了提高现有方法的效率,提出了一种新的旋翼角稳定性评估的时域和直接混合稳定方法。该方法能够更快地检测小信号和暂态稳定情况,同时将经典稳定性直接方法的应用扩展到多摆幅稳定性分析。与传统的依赖系统整体能量的直接方法不同,该方法利用临界装置能量计算系统的临界能量,便于多摆稳定性分析。这项工作的主要贡献包括引入了一个新的度量,称为“不稳定时间”,它允许在干扰期间预测分离或孤岛区域。此外,该方法还可以根据电力系统中所有设备在小干扰或大干扰下的临界程度对其进行排序。同时,给出了时域仿真的停止条件,减少了算法的执行时间,适合于动态安全评估的实时或近实时应用。本文采用IEEE 16机68总线电源系统对该方法进行了多种稳定场景的测试,并给出了四种可能的稳定场景。结果表明,该方法在电力系统中关键装置的识别和单转子及多转子角稳定性评估中具有较高的准确性。
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引用次数: 0
Cooperative Fusion Localization of a Nonstationary Target for Multiple UAVs Without GPS 多架无人飞行器在没有 GPS 的情况下对非稳态目标进行合作融合定位
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-09 DOI: 10.1109/JSYST.2024.3445377
Fei Zhang;Xingling Shao;Wendong Zhang
This article studies a global positioning system (GPS)-free distributed localization problem for a nonstationary target using a cluster of unmanned aerial vehicles (UAVs) loaded with bearing sensors, which aims to cooperatively estimate the relative positions of target by local interactions, regardless of whether or not the target can be directly detected. First, for leader UAVs that can readily detect the target, a novel bearing-based estimator devised in a local frame is proposed by following a prediction and correction configuration, while a sufficient condition is established to assure the asymptotic decaying of position estimation error. Second, considering follower UAVs that cannot directly observe the target, a special consensus-based cooperative fusion algorithm comprised of coupled observation and localization subsystems is proposed for UAVs to synchronize the target estimation with neighbors’ localization, wherein a fixed-time distributed observer is delicately constructed to provide target speed estimates, such that the requirements on the global availability of target speed can be avoided. The remarkable merit is that without resorting to GPS, all members can reach an agreement on relative positioning estimates in a distributed execution sense. Lyapunov approach certifies that all errors can exponentially approximate to the origin. Simulations confirm the efficacy of the presented algorithm.
本文研究了一种不需要全球定位系统(GPS)的非静止目标分布式定位问题,该问题采用装载方位传感器的无人机群,目的是通过局部交互来协同估计目标的相对位置,而不考虑目标是否能被直接探测到。首先,针对易于探测到目标的领先无人机,采用预测和校正配置,在局部框架下设计了一种新的基于方位的估计器,并建立了位置估计误差渐近衰减的充分条件;其次,针对跟随者无人机无法直接观测目标的情况,提出了一种特殊的、基于共识的、由观测和定位耦合子系统组成的协同融合算法,使无人机的目标估计与邻居的定位同步,该算法巧妙地构造了固定时间分布式观测器来提供目标速度估计,避免了对目标速度全局可用性的要求。值得注意的是,在不使用GPS的情况下,所有成员都可以在分布式执行的意义上就相对定位估计达成一致。李亚普诺夫方法证明了所有误差都能指数逼近原点。仿真结果验证了该算法的有效性。
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引用次数: 0
Communication-Efficient Federated Learning for Large-Scale Multiagent Systems in ISAC: Data Augmentation With Reinforcement Learning ISAC 中大规模多代理系统的通信效率联合学习:利用强化学习进行数据扩充
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-06 DOI: 10.1109/JSYST.2024.3450883
Wenjiang Ouyang;Qian Liu;Junsheng Mu;Anwer AI-Dulaimi;Xiaojun Jing;Qilie Liu
Integrated sensing and communication (ISAC) has attracted great attention with the gains of spectrum efficiency and deployment costs through the coexistence of sensing and communication functions. Meanwhile, federated learning (FL) has great potential to apply to large-scale multiagent systems (LSMAS) in ISAC due to the attractive privacy protection mechanism. Nonindependent identically distribution (non-IID) is a fundamental challenge in FL and seriously affects the convergence performance. To deal with the non-IID issue in FL, a data augmentation optimization algorithm (DAOA) is proposed based on reinforcement learning (RL), where an augmented dataset is generated based on a generative adversarial network (GAN) and the local model parameters are inputted into a deep Q-network (DQN) to learn the optimal number of augmented data. Different from the existing works that only optimize the training performance, the number of augmented data is also considered to improve the sample efficiency in the article. In addition, to alleviate the high-dimensional input challenge in DQN and reduce the communication overhead in FL, a lightweight model is applied to the client based on deep separable convolution (DSC). Simulation results indicate that our proposed DAOA algorithm acquires considerable performance with significantly fewer augmented data, and the communication overhead is reduced greatly compared with benchmark algorithms.
集成传感与通信(ISAC)技术由于在频谱效率和部署成本方面的优势而受到广泛关注。同时,联邦学习(FL)由于具有良好的隐私保护机制,在ISAC中的大规模多智能体系统(LSMAS)中具有很大的应用潜力。非独立同分布(non- independent identiydistribution, non-IID)是FL中的一个基本问题,严重影响了算法的收敛性能。为了解决FL中的非iid问题,提出了一种基于强化学习(RL)的数据增强优化算法(DAOA),该算法基于生成式对抗网络(GAN)生成增强数据集,并将局部模型参数输入深度q -网络(DQN)学习增强数据的最优数量。不同于现有的工作只优化训练性能,本文还考虑了增强数据的数量来提高样本效率。此外,为了缓解DQN中的高维输入挑战和降低FL中的通信开销,将基于深度可分离卷积(DSC)的轻量级模型应用于客户端。仿真结果表明,本文提出的DAOA算法在增强数据显著减少的情况下获得了相当好的性能,与基准算法相比,通信开销大大降低。
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引用次数: 0
Performance Analysis and Secure Resource Allocation for Relay-Aided MISO-NOMA Systems 中继辅助 MISO-NOMA 系统的性能分析和安全资源分配
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-05 DOI: 10.1109/JSYST.2024.3423012
Huifang Li;Jing Li;Meng Liu;Fengkui Gong
In this article, we investigate the physical layer security for a relay-aided multiple-input single-output (MISO) nonorthogonal multiple access (NOMA) system, where an eavesdropper tries to intercept confidential information transmission from the source and the relay by employing selection combining and maximal ratio combining, respectively. Specifically, we propose an optimal transmit antenna selection scheme to exploit the inherent spatial diversity gain for security enhancement. The closed-form expressions for the secrecy outage probability are derived to facilitate the system performance evaluation. At a more pragmatic level, we consider multiple users in the relay-aided MISO NOMA system and thus propose a user pairing algorithm to perfect successive interference cancellation. The algorithm avoids full search over all users by exploiting two-sided matching and low-complexity greed, thereby reducing the total complexity. Furthermore, aiming to maximize the secrecy rate, we formulate an optimization problem. Hence, the power allocation schemes are developed by jointly considering power limits and rate requirements. The scheme achieves closed-form solutions of power allocation for the data rate requirements of each user. Finally, simulation results validate the accuracy of the derived analysis and the improvement significant in secrecy performance by the proposed algorithm and scheme.
在本文中,我们研究了中继辅助多入单出(MISO)非正交多址(NOMA)系统的物理层安全性,在该系统中,窃听者试图分别采用选择组合和最大比组合来截获来自源和中继的机密信息传输。具体来说,我们提出了一种最佳发射天线选择方案,以利用固有的空间分集增益来增强安全性。为了便于系统性能评估,我们推导出了保密中断概率的闭式表达式。在更实际的层面上,我们考虑了中继辅助 MISO NOMA 系统中的多个用户,因此提出了一种用户配对算法,以完善连续干扰消除。该算法利用双面匹配和低复杂度贪婪,避免了对所有用户的全面搜索,从而降低了总复杂度。此外,为了最大限度地提高保密率,我们提出了一个优化问题。因此,通过联合考虑功率限制和速率要求,制定了功率分配方案。该方案针对每个用户的数据速率要求实现了功率分配的闭式解。最后,仿真结果验证了推导分析的准确性,以及所提算法和方案对保密性能的显著改善。
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引用次数: 0
Dual-Stage Agglomeration Strategy: An Approach of Flexible Partitioning for Energy Internet 双阶段集聚战略:能源互联网的灵活分区方法
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-05 DOI: 10.1109/JSYST.2024.3412985
Xuguang Hu;Junkai Zhang;Dazhong Ma;Qingchen Wang;Qiuye Sun
With the active participation of numerous end-users in the development of low-carbon energy ecosystems, the continuous expansion of the Energy Internet diminishes the timeliness of energy transmission and increases the complexity of energy scheduling, which leads to reduced energy efficiency. To solve it, a partitioning approach based on dual-stage agglomeration for Energy Internet is proposed in this article. First, the entropy weight of Energy Internet is proposed to assess the line significance of energy transmission, while establishing a uniform criterion of judgment by considering the energy loss of heterogeneous energy sources. Second, as the first stage of partitioning, the local expansion and boundary detection mechanism is proposed to realize localized node agglomeration and generate small-scale regions while ensuring all nodes contained in subregions. Furthermore, the hierarchical region agglomeration mechanism is proposed as the second stage of partitioning, which can aggregate the generated small-scale regions and improve the quality of the partitioning result based on flexible partitioning. Through the above stages, the proposed partitioning approach improves energy allocation, transmission and global efficiency of Energy Internet. Finally, case studies of an Energy Internet with 171-node are presented to validate the proposed approach.
随着众多终端用户积极参与低碳能源生态系统的发展,能源互联网的不断扩展削弱了能源传输的及时性,增加了能源调度的复杂性,导致能源效率降低。为解决这一问题,本文提出了一种基于双阶段聚集的能源互联网分区方法。首先,提出了能源互联网的熵权,以评估能源传输的线路重要性,同时通过考虑异构能源的能量损耗建立统一的判断标准。其次,作为分区的第一阶段,提出局部扩展和边界检测机制,在确保所有节点都包含在子区域内的前提下,实现局部节点集聚,生成小范围区域。此外,还提出了分层区域聚集机制作为划分的第二阶段,该机制可以聚集生成的小尺度区域,并在灵活划分的基础上提高划分结果的质量。通过上述阶段,所提出的分区方法提高了能源互联网的能源分配、传输和全局效率。最后,介绍了具有 171 个节点的能源互联网的案例研究,以验证所提出的方法。
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引用次数: 0
Multiagent Reinforcement Learning-Based Multimodel Running Latency Optimization in Vehicular Edge Computing Paradigm 车载边缘计算范式中基于多代理强化学习的多模型运行延迟优化
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-04 DOI: 10.1109/JSYST.2024.3407213
Peisong Li;Ziren Xiao;Xinheng Wang;Muddesar Iqbal;Pablo Casaseca-de-la-Higuera
With the advancement of edge computing, more and more intelligent applications are being deployed at the edge in proximity to end devices to provide in-vehicle services. However, the implementation of some complex services requires the collaboration of multiple AI models to handle and analyze various types of sensory data. In this context, the simultaneous scheduling and execution of multiple model inference tasks is an emerging scenario and faces many challenges. One of the major challenges is to reduce the completion time of time-sensitive services. In order to solve this problem, a multiagent reinforcement learning-based multimodel inference task scheduling method was proposed in this article, with a newly designed reward function to jointly optimize the overall running time and load imbalance. First, the multiagent proximal policy optimization algorithm is utilized for designing the task scheduling method. Second, the designed method can generate near-optimal task scheduling decisions and then dynamically allocate inference tasks to different edge applications based on their status and task characteristics. Third, one assessment index, quality of method, is defined and the proposed method is compared with the other five benchmark methods. Experimental results reveal that the proposed method can reduce the running time of multimodel inference by at least 25% or more, closing to the optimal solution.
随着边缘计算的发展,越来越多的智能应用被部署在靠近终端设备的边缘,以提供车内服务。然而,一些复杂服务的实现需要多个AI模型的协作来处理和分析各种类型的感官数据。在此背景下,多个模型推理任务的同时调度和执行是一个新兴的场景,面临着许多挑战。主要挑战之一是缩短对时间敏感的服务的完成时间。为了解决这一问题,本文提出了一种基于多智能体强化学习的多模型推理任务调度方法,并设计了新的奖励函数来共同优化总体运行时间和负载不平衡。首先,利用多智能体近端策略优化算法设计任务调度方法。其次,设计的方法可以生成接近最优的任务调度决策,然后根据不同边缘应用的状态和任务特征动态分配推理任务。第三,定义了方法质量这一评价指标,并与其他五种基准方法进行了比较。实验结果表明,该方法可以将多模型推理的运行时间减少至少25%以上,接近最优解。
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引用次数: 0
Dynamic Event-Triggered Containment Control for T–S Fuzzy Multiagent Systems With Actuator Faults 具有执行器故障的 T-S 模糊多代理系统的动态事件触发遏制控制
IF 4 3区 计算机科学 Q1 COMPUTER SCIENCE, INFORMATION SYSTEMS Pub Date : 2024-09-02 DOI: 10.1109/JSYST.2024.3408607
Lihong Feng;Bonan Huang;Xiangpeng Xie
This article investigates the output containment problem for nonlinear heterogeneous multiagent systems subjected to actuator faults. The dynamics of followers are modeled by Takagi–Sugeno (T–S) fuzzy systems, these models are effective in handling a wide range of nonlinearities. First, to address the challenge of limited information interaction between followers and leaders, a distributed compensator is developed to estimate the convex hull information derived from the leaders' states. Furthermore, a dynamic event-triggered mechanism combined with a sampler is employed to eliminate unnecessary continuous transmission, thereby reducing the communication burden and saving energy. Subsequently, fuzzy controllers are devised for the followers based on the output information and the states of compensators, ensuring the output containment of the T–S fuzzy system and preventing the propagation of actuator faults. The Lyapunov stability theory is utilized to derive rigorous convergence conditions for the system, and then, gain matrices are obtained in terms of linear matrix inequalities. A numerical simulation and a tunnel diode network circuit model simulation are provided to demonstrate the effectiveness and superiority of the proposed controller.
本文研究了受执行器故障影响的非线性异构多代理系统的输出控制问题。跟随者的动态由高木-菅野(T-S)模糊系统建模,这些模型能有效处理各种非线性问题。首先,为了应对追随者和领导者之间有限信息交互的挑战,开发了一种分布式补偿器,用于估计从领导者状态中得出的凸壳信息。此外,还采用了一种与采样器相结合的动态事件触发机制,以消除不必要的连续传输,从而减轻通信负担并节约能源。随后,根据输出信息和补偿器的状态为跟随者设计模糊控制器,确保 T-S 模糊系统的输出控制,防止执行器故障的传播。利用 Lyapunov 稳定性理论推导出系统的严格收敛条件,然后根据线性矩阵不等式求得增益矩阵。通过数值模拟和隧道二极管网络电路模型模拟,证明了所提控制器的有效性和优越性。
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引用次数: 0
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