Renewable Energy最新文献

A two-stage siting decision framework for biomass-coal co-firing with carbon capture and storage (BCCCS) retrofit of coal-fired power plants based on fuzzy theory: An empirical study in Hebei province 基于模糊理论的生物质煤共烧碳捕集与封存改造两阶段选址决策框架——以河北省为例

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-11 DOI: 10.1016/j.renene.2025.125007

Yanqin Huang, Lanling Liu, Yifan Shao, Yifei Ma, Lei Guo, Leyi Sun, Tipeng Wang, Qiang Lu

Biomass is a zero-carbon fuel compared with coal. Biomass-coal Co-firing with Carbon Capture and Storage (BCCCS) retrofit for coal-fired power plants can effectively reduce carbon emissions from coal-fired power plants at both the source and the sink, contributing to realizing the "30 60″ decarbonization goal. To achieve a successful transformation, it is crucial to select a coal-fired power plant that is suitable for retrofitting. This paper aims to present a new approach to selecting the most suitable coal-fired power plants for retrofitting (unminable coalbed methane was selected as a sequestration site). A novel two-stage evaluation index system for feasibility evaluation and suitability evaluation was constructed. Experts' intuitive fuzzy scores were collected to process qualitative data. The Fuzzy Analytic Hierarchy Process-Entropy Weight Method (FAHP-EWM) was proposed to obtain the indicator weights. The weights were used to improve the Fuzzy Multi-Objective Optimization Ratio Analysis (FMOORA) to rank the alternatives. A specific case in Hebei Province, China illustrated the feasibility and practicality of the proposed method. Calculations and comparative analysis relating to weight fluctuations and loss aversion coefficient showed that the proposed method was robust, effective, and superior. Multi-dimensional management insights were provided for decision-makers to implement BCCCS retrofits in coal-fired power plants.

与煤相比，生物质是一种零碳燃料。燃煤电厂生物质-煤共烧+碳捕集与封存（BCCCS）改造可有效降低燃煤电厂的源汇碳排放，有助于实现“30 - 60″”脱碳目标。为了实现成功的改造，选择适合改造的燃煤电厂至关重要。本文旨在提出一种选择最合适的燃煤电厂进行改造的新方法（选择不可开采的煤层气作为封存地点）。构建了一种新的可行性评价和适宜性评价两阶段评价指标体系。收集专家的直观模糊评分来处理定性数据。提出了模糊层次分析法-熵权法（FAHP-EWM）来确定指标的权重。利用权重对模糊多目标优化比率分析法（FMOORA）进行改进，对备选方案进行排序。河北省的一个具体案例说明了该方法的可行性和实用性。对权重波动和损失规避系数的计算和对比分析表明，该方法鲁棒、有效、优越。为决策者在燃煤电厂实施BCCCS改造提供了多维度的管理见解。

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引用次数: 0

Comparative life cycle assessment of wood pellet supply chains: Evaluating torrefaction, hydrothermal carbonization and steam explosion pre-treatment pathways 木质颗粒供应链的生命周期比较评估：评估焙烧，水热碳化和蒸汽爆炸预处理途径

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-10 DOI: 10.1016/j.renene.2025.124993

Changliu He , Yuanyuan Wei , Yang Liu , Hejie Yu , Xu Zhang , Huimin Yun , Jianjun Dai , Xiaotao Bi

Wood pellet fuels are recognized as a sustainable alternative to coal due to their lower lifecycle CO₂ emissions and higher combustion calorific value. British Columbia (BC), Canada, with its abundant forestry resources and substantial wood chip byproducts from wood processing, offers an ideal environment for developing a low-carbon wood pellet industry. This study provides a comprehensive lifecycle comparison of three pretreatment pathways—torrefaction (TOR), hydrothermal carbonization (HTC), and steam explosion (SE)—in terms of energy use, CO₂ emissions, and economic performance. Results demonstrate that the TOR pathway consumes the least energy (0.0383 GJ electricity/GJ pellets), emits the least CO₂ (2056 g CO₂-eq/GJ pellet), and has the lowest delivery cost ($13.91/GJ pellet). In contrast, the SE pathway exhibits the highest values in all categories. The differences stem mainly from variations in production processes and transportation. The findings affirm that TOR remains the most suitable method for converting woody biomass into pellet fuel, consistent with its current industrial dominance. Although HTC and SE are still largely confined to small-medium scale trials, further optimization could enhance their competitiveness. This systematic comparative assessment offers valuable insights for the development of biomass energy in BC and other forest-rich regions, supporting informed decision-making for sustainable pellet production.

木屑颗粒燃料由于其较低的生命周期二氧化碳排放量和较高的燃烧热值而被认为是煤炭的可持续替代品。加拿大不列颠哥伦比亚省拥有丰富的林业资源和木材加工产生的大量木屑副产品，为发展低碳木屑颗粒工业提供了理想的环境。本研究对三种预处理途径——焙烧（TOR）、热液碳化（HTC）和蒸汽爆炸（SE）——在能源使用、二氧化碳排放和经济性能方面进行了全面的生命周期比较。结果表明，TOR途径能耗最小（0.0383 GJ电/GJ颗粒），二氧化碳排放量最少（2056 g CO2当量/GJ颗粒），运输成本最低（13.91美元/GJ颗粒）。相反，SE通路在所有类别中都表现出最高的值。这些差异主要源于生产过程和运输方式的不同。研究结果证实，TOR仍然是将木质生物质转化为颗粒燃料的最合适方法，与其目前的工业主导地位相一致。尽管HTC和SE在很大程度上仍局限于中小规模的试验，但进一步的优化可以增强它们的竞争力。这种系统的比较评估为卑诗省和其他森林丰富地区的生物质能发展提供了有价值的见解，支持可持续颗粒生产的明智决策。

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引用次数: 0

An integrated multi-objective optimization framework for large-scale floating offshore wind turbine 大型浮式海上风力机集成多目标优化框架

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-10 DOI: 10.1016/j.renene.2025.124978

Jiazhi Wang , Wei Shi , Yajun Ren , Xiaoming Ran , Maurizio Collu , Vengatesan Venugopal , Haisheng Zhao

This paper proposes a multi-objective optimization framework for large-scale floating offshore wind turbines, addressing the limitations of current optimization methods in handling motion performance interaction effects during the co-optimization of floating platforms and mooring systems. A multi-objective genetic algorithm was employed to minimize the cost of the floating platform and mooring system while ensuring motion performance and safety, accelerating the design cycle through an automated optimization workflow. The constraint functions are mainly established according to industry standards and requirements, then given adequate safety margins for motion through reference points. The optimization process conducts systematic feasibility verification through integrated calculations under multidirectional wave headings and coupled wind-wave load conditions, encompassing equilibrium analysis, intact stability evaluation, mooring line tension failure assessment, natural period computation, and frequency-domain RAO analysis. Time-domain simulation is used to verify the effectiveness of the optimal pareto front solutions concerning motion performance and mooring safety, demonstrating the reliability of the proposed multi-objective optimization framework. The proposed approach offers new insights into the efficient design optimization of large-scale FOWTs, providing an efficient and reliable tool for their commercial engineering design optimization.

本文提出了一种大型浮式海上风力发电机的多目标优化框架，解决了当前优化方法在浮式平台和系泊系统协同优化过程中在处理运动性能交互效应方面的局限性。采用多目标遗传算法最小化浮式平台和系泊系统的成本，同时保证运动性能和安全，通过自动化优化工作流程加快设计周期。约束函数主要根据行业标准和要求建立，然后通过参考点给予足够的运动安全裕度。优化过程通过多向波头和耦合风浪荷载条件下的综合计算，包括平衡分析、完整稳定性评估、系泊索张拉破坏评估、自然周期计算和频域RAO分析，进行系统的可行性验证。时域仿真验证了运动性能和系泊安全最优pareto前解的有效性，验证了所提多目标优化框架的可靠性。该方法为大型风力发电机组的高效设计优化提供了新的思路，为其商业工程设计优化提供了高效、可靠的工具。

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引用次数: 0

Interval analysis based coordinated dispatch of battery energy storage systems and flexible loads for distribution systems considering extreme operating scenarios 基于区间分析的蓄电池储能系统与配电系统柔性负荷协调调度

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-09 DOI: 10.1016/j.renene.2025.125001

Xuehan Zhang , Zhenning Pan , Sungyun Choi

Interval optimization (IO)-based dispatch methods are widely used to address the uncertainty of renewable energy sources (RESs) in distribution systems. However, existing studies rarely embed interval power flow (IPF) information into IO-based dispatch models to mitigate state-variable limit violations. This work proposes an interval analysis based coordinated dispatch approach for battery energy storage systems and flexible loads that explicitly incorporates IPF-derived extreme operating scenarios. A linearized power flow formulation solved via successive linear programming is developed to compute IPF efficiently. Potential statutory violations of state variables are analyzed based on the IPF results to obtain the corresponding extreme operating scenarios. A coordinated dispatch strategy considering these extreme scenarios is formulated as a mixed-integer linear programming (MILP) problem that defines the operating intervals of flexible resources to ensure system security under the uncertainties. The simulation results show that the proposed dispatch framework eliminates security-limit violations while achieving the lowest mean operation cost with the tightest 95 % confidence interval among all comparison methods. Compared with a nonlinear method, the proposed MILP dispatch method exhibits below 1 % errors and 2000 times faster speeds. These results indicate the proposed framework has superior economic performance, high accuracy, and significant computational efficiency.

基于区间优化（IO）的调度方法被广泛用于解决配电系统中可再生能源的不确定性。然而，现有的研究很少将区间潮流（IPF）信息嵌入到基于io的调度模型中，以减轻状态变量的极限违规。这项工作提出了一种基于间隔分析的电池储能系统和灵活负载的协调调度方法，该方法明确地结合了ipf衍生的极端操作场景。为了有效地计算IPF，提出了一种用逐次线性规划求解的线性潮流公式。基于IPF结果，分析了状态变量可能存在的法定违规行为，得到了相应的极端运行情景。考虑这些极端情况的协调调度策略是一个混合整数线性规划（MILP）问题，该问题定义了灵活资源的运行间隔，以保证系统在不确定情况下的安全性。仿真结果表明，所提出的调度框架在消除安全限制违规的同时，实现了最低的平均运行成本，在所有比较方法中95%置信区间最紧。与非线性调度方法相比，该方法误差小于1%，速度提高2000倍。结果表明，该框架具有较好的经济性能、较高的计算精度和显著的计算效率。

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引用次数: 0

Development of a garlic peel biochar-based shape-stabilized phase change material to reduce energy demand for building cooling 大蒜皮生物炭基形状稳定相变材料的开发，以减少建筑冷却的能源需求

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-09 DOI: 10.1016/j.renene.2025.124991

Subham Show , Bikash Kumar Mondal , Sirshendu Mondal , Aparesh Datta

Incorporating Phase change materials (PCMs) into buildings provide notable benefits to passive building thermal management. The PCM absorbs heat during peak solar irradiation and temperature and releases it when temperature falls. Maintaining a lower indoor temperature using PCM reduces the cooling energy demand in energy-efficient buildings. The integration of PCM into buildings can be achieved by developing form-stable PCM, which is impregnated into Garlic Peel Biochar (GPB). The activated GPB obtained by pyrolysis process at different temperature 500 °C, 600 °C, and 700 °C. The biochars and OM35 are combined in different biochar-to-PCM loading ratios by weight 1:3, 1:4, and 1:5. The biochar and PCM are mixed through the process of direct impregnation and vacuum impregnation. The vacuum impregnation is more effective than direct impregnation revealed from PCM leakage tests. The leakage test also discloses that bio-composite of biochar produced at 700 °C, named GPB700 and OM35 in a loading ratio 1:5 has the lowest leakage due to the porous and stacked morphology of the biochar. The GPB700 is alkali activated with KOH at a temperature 800 °C. The activated GPB700 (KOH-AGPB) impregnated with same quantity of OM35. This showed that further reduction in leakage due to its increased porosity and high surface area of 1459.930 m²/g. The Brunauer-Emmett-Teller (BET) analysis also revealed that the KOH-AGBP has pores of average diameter 3.18 nm and mean pore volume between 0.305 cc/g. The X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) curves of the OM35/KOH-AGPB SSPCM confirm that no change in the crystal structure of the PCM after impregnation and purely physical interaction between the PCM and activated biochar without any undesired chemical reaction. Hence proving them chemically compatible. The thermogravimetric analysis (TGA) reveals that encapsulating OM35 in the carbon-rich activated bio char enhances thermal stability to the PCM. The strong physical affinity between KOH-AGPB and OM35 due to high interfacial interactions with OM35 molecules inhibits thermal degradation. The Differential Scanning Calorimetry (DSC) test found that the OM35/KOH-AGPB SSPCM has a mere 22.3 % reduction in latent heat of melting at 121.9 J/g.

将相变材料（PCMs）结合到建筑中为被动式建筑热管理提供了显著的好处。PCM在太阳辐照和温度峰值时吸收热量，并在温度下降时释放热量。使用PCM保持较低的室内温度可以减少节能建筑的冷却能源需求。PCM与建筑的整合可以通过开发形式稳定的PCM来实现，PCM浸渍在大蒜皮生物炭（GPB）中。在500℃、600℃和700℃的不同温度下热解得到活化的GPB。将生物炭和OM35按重量1:3、1:4和1:5的不同生物炭与pcm的负载比组合。将生物炭与PCM通过直接浸渍和真空浸渍混合。PCM泄漏试验表明，真空浸渍比直接浸渍更有效。泄漏试验还表明，在700℃下制备的生物炭复合材料GPB700和OM35在1:5的加载比下，由于生物炭的多孔和堆积形态，泄漏最小。GPB700在800℃的温度下用KOH进行碱活化。活化后的GPB700 （KOH-AGPB）浸渍等量的OM35。这表明，由于其孔隙率的增加和1459.930 m2/g的高表面积，泄漏进一步减少。brunauer - emmet - teller （BET）分析还显示，KOH-AGBP的孔隙平均直径为3.18 nm，平均孔隙体积为0.305 cc/g。OM35/KOH-AGPB SSPCM的x射线衍射（XRD）和傅里叶变换红外光谱（FT-IR）曲线证实，浸渍后PCM的晶体结构没有发生变化，PCM与活化的生物炭之间发生了纯粹的物理相互作用，没有发生任何不良的化学反应。因此证明了它们的化学相容性。热重分析（TGA）表明，将OM35包埋在富碳活化生物炭中可以提高PCM的热稳定性。KOH-AGPB与OM35分子的高界面相互作用使其具有较强的物理亲和力，从而抑制了热降解。差示扫描量热法（DSC）测试发现，OM35/KOH-AGPB SSPCM在121.9 J/g时，熔化潜热仅降低22.3%。

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引用次数: 0

Integrated hydrothermal carbonization and pyrolysis for valorizing high-moisture biomass: Structural evolution and energy efficiency evaluation 热液炭化和热解法在高湿生物质上的应用：结构演化和能效评价

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-09 DOI: 10.1016/j.renene.2025.124998

Hao Xu , Douglas Hungwe , Pu Yang , Mengzhu Yu , Hieng Ong Tie , Kunio Yoshikawa , Fumitake Takahashi

High water content of moisture-rich biomass, such as asparagus by-products, hampers energy recovery in conventional thermochemical processes by increasing pretreatment requirements. Hydrothermal carbonization (HTC) has been widely applied to valorize such feedstocks by extracting the liquid-phase compounds; however, the downstream utilization of solid hydrochar remains insufficiently explored. This study proposes an integrated HTC-pyrolysis strategy that leverages intrinsic biomass moisture to minimize external energy demand and enable efficient valorization of hydrochar, thereby enhancing overall system efficiency. By systematically varying HTC conditions across a range of temperatures and total solid ratios, we show that optimized processing improves hydrochar fuel properties and shifts pyrolysis products toward energy-dense phenolics and aromatics. Simplified energy efficiency and life cycle assessments further demonstrate that moderate HTC conditions provide the best balance of energy recovery and environmental performance. These findings highlight the potential of HTC-pyrolysis integration as a sustainable and practical approach for valorizing high-moisture biomass resources.

富含水分的生物质（如芦笋副产品）的高含水量增加了预处理要求，从而阻碍了传统热化学过程中的能量回收。水热碳化（HTC）已被广泛应用于通过提取液相化合物来对这类原料进行增值；然而，固体碳氢化合物的下游利用仍然没有得到充分的探索。本研究提出了一种集成的htc热解策略，该策略利用生物质固有水分来最大限度地减少外部能源需求，并实现碳氢化合物的有效增值，从而提高整体系统效率。通过系统地改变温度和总固体比范围内的HTC条件，我们发现优化的工艺改善了碳氢化合物燃料的性能，并将热解产物转向能量密集的酚类和芳烃。简化的能源效率和生命周期评估进一步表明，适度的HTC条件提供了能源回收和环境绩效的最佳平衡。这些发现凸显了高温热解整合作为一种可持续和实用的高水分生物质资源增值方法的潜力。

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引用次数: 0

Model construction and optical performance research of a novel double-involute compound parabolic collector with evacuated tube to eliminate ray escape 一种新型带真空管的双渐开线复合抛物收集器的模型构建及光学性能研究

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-09 DOI: 10.1016/j.renene.2025.124997

Weiwei Zhang , Yuye Chen , Ningning Hu , Zijing Zhang , Yi Liu , Lingwei Zhang , Qifa Wang

To eliminate ray escape at the bottom of standard compound parabolic collector (S-CPC) with an evacuated tube receiver, a novel double-involute CPC (DI-CPC) was proposed. The ray-tracing model for the CPC with evacuated tube, established on geometric optics reflection principles, underwent experimental validation of its accuracy. Within the ray-tracing model, the spectral reflectivity of the silver-plated mirror surface, transmissivity through the glass tube, and coating absorptivity were expressed as functions of incident angles, thereby rejecting constant-value assumptions. Ray escape at the bottom was effectively eliminated through the structural improvement of the DI-CPC. The DI-CPC exhibited a 15.2 % enhancement in optical efficiency at 0° incident angle. The ray escape above absorber after the structure improvement can be eliminated by increasing the absorber radius or using single-axis azimuthal tracking method. With an absorber radius of 25.6 mm, the average optical efficiency of DI-CPCR exhibits an 8.97 % enhancement over S-CPC. Under the single-axis azimuthal tracking mode with twice-daily adjustment, the diurnal average values of optical efficiency of the S-CPC, DI-CPC and DI-CPCR were 62.4 %, 72.4 %, and 73.1 % respectively on the summer solstice, and were 61.9 %, 72.1 %, and 73.0 % respectively on the winter solstice.

为了消除带真空管接收器的标准复合抛物型集热器（S-CPC）底部的射线逸出，提出了一种新型双渐开线集热器（DI-CPC）。基于几何光学反射原理，建立了真空管CPC的光线追踪模型，并对其准确性进行了实验验证。在光线追踪模型中，镀银镜面的光谱反射率、通过玻璃管的透射率和涂层吸收率被表示为入射角的函数，从而拒绝了常值假设。通过对DI-CPC结构的改进，有效地消除了底部的射线逸出。在0°入射角下，DI-CPC的光效率提高了15.2%。通过增大吸波半径或采用单轴方位跟踪法，可以消除结构改进后吸波器上方的射线逸出。吸收半径为25.6 mm时，DI-CPCR的平均光效率比S-CPC提高了8.97%。在单轴定向跟踪模式下，S-CPC、DI-CPC和DI-CPCR在夏至日的平均光效率分别为62.4%、72.4%和73.1%，在冬至日的平均光效率分别为61.9%、72.1%和73.0%。

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引用次数: 0

Competing electrons with humic and protein-like substances via direct interspecies electron transfer during anaerobic digestion of waste activated sludge with glycerol 在用甘油厌氧消化废活性污泥过程中，通过直接种间电子转移与腐殖质和蛋白质样物质竞争电子

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-09 DOI: 10.1016/j.renene.2025.124994

Jianpeng Zhang , Zhenru Wang , Yuan Li , Cheng Sun , Ying Deng , Bowen Yang , Yang Li , Zhiqiang Zhao , Yaobin Zhang

Alcohol feeding had been recognized as an effective strategy for boosting methane production during anaerobic digestion of waste activated sludge (WAS). However, the mechanisms were curtly attributed to the promotion of direct interspecies electron transfer (DIET). Anaerobic digestion of WAS with a series of concentrations of glycerol were conducted. When eliminated methane production from glycerol, the remaining methane production was still 15−32 % higher than that without glycerol. However, the differences in the efficiency of volatile solid removal as well as concentration of short-chain fatty acids among all the digesters were not significant. Microbial communty analysis showed that addition of glycerol increased abundance of Methanothrix soehngenii GP6 that was capable of participating in DIET and sugar/amino acid-fermenting bacteria (Fastidiosipila sanguinis and Brevefilum fermentans). Electrochemical Fourier transform infrared spectra and electron transfer coefficient showed that addition of glycerol increased electron transfer efficiencies of digestates, and the gaps were further widened with the increase in the concentration of glycerol. Conversely, addition of glycerol lowered electron transfer efficiencies of humic and protein-like substances extracted from digestates. These results suggested the potential mechanisms on competing electrons with humic and protein-like substances via DIET for high-efficiency methane production from WAS with glycerol.

在废活性污泥厌氧消化过程中，添加酒精被认为是提高甲烷产量的有效策略。然而，其机制被简单地归结为促进直接种间电子转移（DIET）。用不同浓度的甘油对WAS进行厌氧消化。当去除甘油的甲烷产量时，剩余的甲烷产量仍比不加甘油的甲烷产量高出15 ~ 32%。但各消化器对挥发性固体的去除率和短链脂肪酸的浓度差异不显著。微生物群落分析表明，添加甘油增加了soehngenmethanothrix GP6的丰度，能够参与DIET和糖/氨基酸发酵菌（Fastidiosipila sanguinis和Brevefilum fermentans）。电化学傅里叶变换红外光谱和电子传递系数表明，甘油的加入提高了消化液的电子传递效率，并且随着甘油浓度的增加，间隙进一步扩大。相反，甘油的加入降低了从消化液中提取的腐殖质和蛋白质样物质的电子传递效率。这些结果提示了通过DIET与腐殖质和蛋白质样物质竞争电子以使WAS与甘油高效产甲烷的潜在机制。

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引用次数: 0

LSTM-Transformer with decomposition–reconstruction for enhanced solar irradiance forecasting incorporating meteorological variables 结合气象变量的LSTM-Transformer分解重建增强太阳辐照度预报

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-08 DOI: 10.1016/j.renene.2025.124971

Zizhen Liu, Xuejing Zhao

Solar power is growing rapidly worldwide, but its intermittency and volatility threaten grid stability, while the accurate irradiance forecasts are vital to reduce dispatching costs and maintain system security. This paper proposes a VMDFE-LSTM-Transformer forecasting framework optimized by Bayesian optimization (BO) for high-precision solar irradiance prediction. The framework employs variational mode decomposition (VMD) and fuzzy entropy (FE) to decompose and reconstruct solar irradiance data, effectively extracting multi-frequency components from the data. The resulting three Cooperative Intrinsic Mode Functions (Co-IMFs) are combined with meteorological variables and fed into an LSTM-Transformer predictor optimized through BO. To validate the model under different climatic conditions, systematic experiments are conducted on seasonal datasets from China’s four major climate zones. Performance comparisons with multiple forecasting models, including advanced architectures such as Crossformer, confirm the superior single-step and multi-step forecasting capability of the proposed model. Additionally, the differentiated contribution of meteorological features to forecasting accuracy under various climatic conditions is investigated. To enable unified performance assessment across multiple datasets, the normalized MAE (nMAE) metric is introduced. Within the decomposition framework, adding meteorological variables reduces nMAE by 7.91–25.09%, with greater gains observed when sunny conditions are scarce and data volatility is high. These results can provide practical guidance for designing region-specific irradiance forecasting systems that balance accuracy and data acquisition costs.

太阳能发电在全球范围内迅速发展，但其间歇性和波动性威胁着电网的稳定，而准确的辐照度预测对于降低调度成本和维护系统安全至关重要。提出了一种基于贝叶斯优化（BO）的VMDFE-LSTM-Transformer高精度太阳辐照度预测框架。该框架采用变分模态分解（VMD）和模糊熵（FE）对太阳辐照度数据进行分解重构，有效提取数据中的多频分量。得到的三个协同内模函数（Co-IMFs）与气象变量相结合，并通过BO优化输入LSTM-Transformer预测器。为了验证模型在不同气候条件下的有效性，对中国四大气候带的季节数据集进行了系统试验。与多个预测模型（包括Crossformer等先进架构）的性能比较，证实了该模型具有优越的单步和多步预测能力。此外，还研究了不同气候条件下气象特征对预报精度的差异贡献。为了实现跨多个数据集的统一性能评估，引入了规范化MAE （nMAE）度量。在分解框架内，加入气象变量使nMAE降低了7.91-25.09%，在日照条件较少、数据波动性较大的情况下，nMAE的降低幅度更大。这些结果可以为设计平衡精度和数据采集成本的特定区域辐照度预测系统提供实用指导。

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引用次数: 0

A hybrid mechanism-based and data-driven dynamic equivalence method for PMSG wind farms considering wake effect and fault severity 考虑尾流效应和故障严重程度的PMSG风电场混合动力等效方法

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2025-12-08 DOI: 10.1016/j.renene.2025.124980

Yuhong Wang , Tian Cao , Shilin Gao , Ying Chen , Jianquan Liao , Zongsheng Zheng , Bingjie Zhai

To improve the simulation efficiency of large-scale wind farms, it is necessary to construct the equivalent model of wind farms. Due to the shortcomings in the calculation of clustering indicators and adaptation to parameter changes of wind turbines, the traditional methods are difficult to accurately and efficiently simulate the transient response for wind farms after the fault. To this end, the dynamic equivalence method considering the wake effect and fault severity for permanent magnet synchronous generator (PMSG) wind farms is proposed in this paper. First, the response of PMSGs is classified according to the initial wind speed and fault severity. Second, the wind speeds of PMSGs are estimated by the wake model considering nonlinear interactions between multiple PMSGs, which are closer to the wind speed distribution in actual wind farms. The calculation method of terminal voltage for each PMSG during the fault based on the extended long short-term memory (xLSTM) network is proposed, which achieves efficient computation of clustering indicators. Subsequently, a parameter calibration method for the equivalent parameters of wind farms based on the Gaussian mixture model is designed, which can adapt to the parameter change of wind turbines. Finally, case studies verify that the clustering efficiency of wind farms can be enhanced and the equivalent error is reduced by more than 20% after using the proposed method.

为了提高大型风电场的模拟效率，有必要建立风电场的等效模型。由于传统方法在聚类指标计算和对风力机参数变化的适应性方面存在不足，难以准确、高效地模拟风电场故障后的暂态响应。为此，本文提出了考虑尾流效应和故障严重程度的永磁同步发电机（PMSG）风电场动态等效方法。首先，根据初始风速和故障严重程度对pmmsg的响应进行分类。其次，采用考虑多个pmsg之间非线性相互作用的尾迹模型估计pmsg的风速，该模型更接近实际风电场的风速分布。提出了基于扩展长短期记忆（xLSTM）网络的故障过程中各PMSG端子电压的计算方法，实现了聚类指标的高效计算。随后，设计了一种基于高斯混合模型的风电场等效参数的参数标定方法，该方法能够适应风力机参数的变化。最后，通过实例验证，采用该方法可以提高风电场的聚类效率，等效误差降低20%以上。

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引用次数: 0