Results 1 to 10 of about 53 (52)
基于DE-RBF 混合优化算法的微电网自适应下垂控制策略 [PDF]
全球能源互联网, 2023 孤岛微电网因线路阻抗各异，采用传统下垂控制无法实现功率按分布式电源容量比例分配，会产生电压/频率偏差。为此，提出一种基于DE-RBF混合优化算法的自适应下垂控制策略。首先，构建下垂控制的两逆变器并联微电网系统动态模型，应用差分进化 （differential evolution，DE） 算法获得多个平衡点的优化下垂控制参数。为提高系统的动态响应速度与稳定性，通过训练径向基 （radial basis function，RBF） 神经网络，对每个平衡点参数进行校正。进而，通过增加RBF神经网络的隐含层数量，
吴丽珍, 魏建平, 丁安邦, 陈伟
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基于可进化 PID 的含电动汽车孤岛微电网负荷频率控制策略 [PDF]
全球能源互联网, 2023 电动汽车（electric vehicle，EV）作为具有车网互动（vehicle-to-grid，V2G）能力的移动储能组件，为微电网的频率稳定提供了更为灵活的控制方案。但是，分布式电源与电动汽车所具有的强非线性，也给微电网频率控制带来了新的挑战。为此，提出了一种基于可进化PID的含电动汽车微电网频率控制策略。首先，考虑电动汽车移动性和用户充电行为随机性，以及电动汽车充电站容量在日内的阶段性突变，建立了由电动汽车充电站、微型燃气轮机与分布式电源组成的微电网系统。其次，将PID与深度确定性策略梯度 ...
范培潇 +4 more
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Probabilistic load flow calculation for three-phase unbalanced droop-regulated islanded microgrids based on low-rank approximation method [PDF]
, 2020 For the characteristics of unbalanced nodes and constant frequency in the sagging control island microgrid, taking into account its three-phase asymmetry and the influence of uncertainty factors, a three-phase probability trend calculation method based ...
Fu, H. +4 more
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Secondary frequency control of islanded microgrid considering wind and solar stochastics
, 2023 As the high penetration of wind and photovoltaic distributed generation (DG) in the microgrid, the stochastic and low inertia emerge, bringing more challenges especially when the microgrid operates in isolated islands.
Chen, Jikai +4 more
core +1 more source
全球能源互联网应用于孤岛型微电网以实现频率控制功能的传统控制器多为分数阶PID（fractional order PID，FOPID）控制器及模糊分数阶PID（fuzzy fractional order PID，FFOPID） 控制器，二者的控制性能均存在局限性。针对这一问题，设计了一种变论域混合FFOPID控制器，用于提高孤岛微电网的频率控制性能。通过对比FOPID、FFOPID以及变论域混合FFOPID3种控制器作用时的不同效果 ...
李翔宇 +7 more
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Review of Energy Management Systems for Islanded Microgrids [PDF]
ObjectivesAgainst the backdrop of energy resource scarcity and increasing environmental demands, distributed energy supply technologies, particularly renewable energy technologies, have attracted significant attention due to their high energy efficiency,
BIE Yu +4 more
core +1 more source
Gaoya dianqi, 2020 为促进孤岛微网中可再生能源的消纳,减小负荷峰谷差。文中在孤岛微网中引入价格型需求响应,以微网运行成本最低和柴油发电机出力最少为目标,综合考虑功率平衡、抽水蓄能机组启停与工况转换等约束条件,构建了含风电、抽水蓄能和柴油发电机的孤岛微网多目标优化调度模型,并采用乌鸦搜索算法进行求解。仿真结果表明:在孤岛微网中引入价格型需求响应能有效削减负荷峰谷差,经济效益显著。与粒子群优化算法相比,乌鸦搜素算法在收敛速度和全局寻优的能力上具有明显优势。
黄景光 +5 more
doaj
Review of Application on Optimization Strategies for New-Type Power System Based on Reinforcement Learning [PDF]
ObjectivesAs power systems evolve toward higher levels of intelligence and automation, reinforcement learning (RL), a key technology in artificial intelligence, shows great potential in the intelligent development of the power sector.
WANG Kai, YAN Zhengyi, ZHAO Kang
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Operation Analysis of a Photovoltaic-Piezoelectric Composite Independent Power Supply System [PDF]
ObjectivesIn order to make the small independent power supply unit provide more flexible and stable power supply, a photovoltaic-piezoelectric composite independent power supply system was designed, and its performance in actual operation was analyzed ...
JU Xing, LIU Yawen, MENG Zirui
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Research on Large-Signal Stability Assessment Methods of DC Microgrids Based on Artificial Intelligence [PDF]
ObjectivesDC microgrids are prone to the issue of large-signal stability due to the low inertia and constant power load characteristics. Traditional model-based methods involve complex calculations and are difficult to solve.
HONG Tao +4 more
core +1 more source