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A Multi-Level Control and Optimization Scheme for Islanded PV Based Microgrid: A Control Frame Work

机译:基于PV的微电网的多级控制与优化方案:控制帧工作

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摘要

This paper proposes a multi-level control and optimization scheme, including grid control and node control, for an islanded 48-V PV-based low-voltage dc (LVdc) microgrid that aims to overcome the drawbacks of centralized and decentralized control schemes. The analyzed microgrid includes a 20-kW rooftop solar system as the main power source with distributed compensation systems. The central supervisory controller is responsible for updating grid characteristics and sending/receiving information to/from local node controllers, which are responsible for bus voltage regulation and energy management. The control hierarchy features optimized and safe operation (charge and discharge) of storage devices in dc microgrids. The paper also demonstrates the application of battery-supercapacitor systems to absorb system transients during load changes. The simulation showcases the continuous flow of information and decision processes via each level of control, while simultaneously taking the constraints of each subsystem into consideration. The scheme has been simulated in MATLAB/Simulink environment for various case studies to evaluate system stability and robustness. Further, the proposed scheme has been tested experimentally with its prototype and its results are explored.
机译:本文提出了一种多级控制和优化方案,包括网格控制和节点控制,用于岛立的48V PV的低压DC(LVDC)MicroGrid,旨在克服集中式和分散的控制方案的缺点。分析的MicroGrid包括20千瓦屋顶太阳系作为具有分布式补偿系统的主电源。中央监督控制器负责将网格特性更新并从本地节点控制器发送/接收信息,这些信息负责总线电压调节和能量管理。控制层次结构在DC微电网中的存储设备的优化和安全操作(充电和放电)。本文还演示了在负载变化期间吸收系统瞬变的电池超级电容器系统的应用。模拟展示了通过每个控制级别的信息和决策过程的连续流程,同时考虑每个子系统的约束。该方案已经在Matlab / Simulink环境中模拟了各种案例研究,以评估系统稳定性和鲁棒性。此外,所提出的方案已经通过实验测试了其原型,并探讨了其结果。

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