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基于DE-RBF 混合优化算法的微电网自适应下垂控制策略 [PDF]
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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未来战场上的作战资源分配是一个存在总资源预算约束的多阶段对抗问题,具有环境高复杂性、动态不确定性、博弈强对抗性。基于布洛托博弈模型,首先把多阶段对抗场景下的资源分配问题建模为双层在线布洛托博弈,然后将原资源分配问题转化为有向无环图上的在线最短路径问题,并借鉴拉格朗日博弈对资源分配问题进行分析求解。此外,提出LagrangeBwK-Exp3-G算法以实现多阶段对抗条件下资源分配问题的高概率遗憾最小化,进一步通过数学推导获得关于时间范围T的高概率遗憾界。最后 ...
陈少飞, 邹明我, 苏小龙, 罗俊仁, 冯俊侨
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在城市高可靠性供电方式下,城市重要用户专门配置的应急电源利用率低下,资源浪费严重。随着未来电网的发展,分布式电源在城市日趋普及,将其兼做应急电源是解决传统应急电源闲置问题、进一步发挥分布式电源作用的有益尝试。提出了一种计及分布式电源的城市重要用户应急电源优化配置方法,以城市分布式电源的类型与特点确定其应急工作方式,利用多人决策AHP方法量化用户重要性,然后基于区域电网结构,以等效重要负荷最大为最优目标,以有功功率平衡为约束,通过遗传算法求解来划分应急孤岛 ...
刘飞, 汤亮亮, 邓鹤鸣, 伍俊
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针对风电波动性、间歇性和难预测等严重冲击电网安全运行问题,提出一种利用变分模态分解(VMD)和自适应权重粒子群算法(APSO)获得风电场混合储能系统容量优化配置方法。首先,基于典型日风电输出功率,利用低通滤波法得到满足标准的目标并网功率并获得储能系统参考功率。然后,将其通过VMD分解为高、低频功率,由超级电容器和蓄电池承担。最后,考虑储能充放电功率与荷电状态(SOC)等约束,建立以系统年综合成本最小为目标的容量优化配置模型,采用APSO算法求解并分析最优分界点和对应的储能配置方案 ...
赵峰, 张帆, 陈小强, 王英
doaj
光伏发电具有随机性、间歇性等特点,其大规模接入配电网给电网安全、经济运行带来挑战。储能是解决高渗透率光伏输出功率波动的有效手段。为此,提出一种结合相邻时段实时预测误差和极限学习机的光伏功率区间预测方法;提出一种分布式储能的区间离散SOC均衡控制策略。在此基础上,构建了包含储能运行成本、系统网损和电压偏差的多目标区间优化运行模型。应用区间泰勒展开的仿射算法将不确定区间潮流问题转化为确定性代数方程组实现潮流计算,同时依据电压-功率和网损-功率灵敏度矩阵重新表达目标函数,采用线性规划法求解。最后 ...
袁晓冬 +4 more
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Read the free Plain Language Summary for this article on the Journal blog. Abstract Soil organic nitrogen (SON) transformation is critical for global nutrient cycling and ecosystem productivity, yet how its responsiveness to climate change differs across diverse land use types remains poorly resolved.
Xinyi Yang +10 more
wiley +1 more source
This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng +5 more
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ABSTRACT VO2 is a promising thermochromic material, but it is still limited by low transparency, weak solar modulation, and poor stability. Here, we develop a coordination‐compound‐derived strategy to construct a hierarchical BiVO4/VO2@BiVO4 film with a core–shell@nanosheet structure.
Huiyan Xu +11 more
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ABSTRACT Additive manufacturing, commonly referred to as three‐dimensional (3D) printing, provides the geometric freedom and multi‐material integration needed to build soft medical robots for minimally invasive interventions, prosthetics, and rehabilitation.
Yao Wang +5 more
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ABSTRACT Layered double hydroxides (LDHs) are attractive non‐noble catalysts for overall water splitting (OWS), yet their hydrogen evolution reaction (HER) activity is often limited by suboptimal *H adsorption and a paucity of accessible sites. Herein, we introduce an oxygen‐vacancy (Ov) engineering strategy to construct ultrathin Ni‐Fe LDH nanosheets ...
Qi Liu +8 more
wiley +1 more source

