Renewable Energy最新文献

Two-stage distributionally robust optimization model of integrated energy system considering wind–solar joint uncertainties and flexible resources management 考虑风能-太阳能联合不确定性和柔性资源管理的综合能源系统两阶段分布鲁棒优化模型

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-04 DOI: 10.1016/j.renene.2026.125366

Jie Li , Jizhen Liu , Yong Hu , Yansong Zhu , Deliang Zeng , Yunzhi Li

As the proportion of renewable energy in new power system continues to grow, wind and solar energy play a significant role in energy conservation and emission reduction. However, the uncertainty of wind and solar leads to insufficient flexibility in integrated energy system (IES), which greatly affects the safe and stable operation of IES. This paper proposes a Copula-based two-stage distributionally robust optimization (CTSDRO) model to improve the flexibility of IES. First, the optimal time-varying Copula function is selected to describe the wind–solar joint uncertainties and to generate sample data, which are applied to construct ambiguity set based on the Wasserstein metric. Subsequently, the proposed model is developed by incorporating affinely adjustable policy and flexible resources management and is reformulated into a tractable model using duality theory and convex optimization techniques. The simulation results show: Compared to the traditional algorithm, the CTSDRO algorithm achieves a balance among economic performance, robustness, and computational efficiency. By incorporating flexible resources into the proposed model, the flexibility shortage is effectively mitigated and the upward flexibility increases by 22 % and the downward flexibility improves by 2.4 times under extreme operating conditions, without sacrificing economic performance.

随着可再生能源在新型电力系统中的比重不断提高，风能和太阳能在节能减排方面发挥着重要作用。然而，风能和太阳能的不确定性导致综合能源系统灵活性不足，极大地影响了综合能源系统的安全稳定运行。本文提出了一种基于copula的两阶段分布鲁棒优化（CTSDRO）模型，以提高IES的灵活性。首先，选取最优时变Copula函数来描述风能-太阳能联合的不确定性并生成样本数据，利用样本数据构建基于Wasserstein度量的模糊集；在此基础上，结合仿射可调策略和灵活资源管理，利用对偶理论和凸优化技术将该模型重新表述为可处理模型。仿真结果表明：与传统算法相比，CTSDRO算法在经济性、鲁棒性和计算效率之间取得了平衡。在不牺牲经济性能的前提下，将柔性资源纳入所提出的模型，有效地缓解了灵活性不足，在极端工况下，向上灵活性提高了22%，向下灵活性提高了2.4倍。

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引用次数: 0

Scaling solar in dense cities: The availability and affordability of distributed photovoltaics (DSPV) electricity in Shenzhen 在人口密集的城市扩展太阳能：深圳分布式光伏（DSPV）电力的可用性和可负担性

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-02 DOI: 10.1016/j.renene.2026.125376

Kai Zhang , Peifeng Ma , Yuan Xu

The availability and affordability of renewable energy are crucial for energy transition. This study develops a geospatial–techno-economic framework to evaluate DSPV potential and costs across Shenzhen's scattered, irregular, and diverse (SID) spaces, focusing on rooftops, building façades, and road noise barriers. Leveraging building vectors with height attributes, a shadow analysis model and solar ray-tracing algorithms were employed to quantify the effects of mutual shading and surface inclination that significantly compromise the capacity factors of PV. High-resolution irradiation data, meteorological parameters, and an irradiation model were utilized. The levelized cost of electricity (LCOE) is analyzed based on installation costs, operational expenses, and other market-driven parameters. The results reveal that rooftops, building facades, and RNBs' PV electricity generation potentials are 21,165 GWh/year, 85,131 GWh/year, and 5.43 GWh/year, respectively, almost equivalent to 94% of Shenzhen's annual electricity demand in 2023. Affordability is a much bigger concern with their LCOE ranges being 0.020–0.421 USD/kWh, 0.058–0.261 USD/kWh, and 0.090–1.404 USD/kWh under different scenarios, respectively. These findings illustrate that spatial constraints in dense cities not only affect the availability of solar electricity but also, more importantly, its affordability.

可再生能源的可获得性和可负担性对能源转型至关重要。本研究开发了一个地理空间-技术-经济框架来评估深圳分散、不规则和多样化（SID）空间的DSPV潜力和成本，重点是屋顶、建筑立面和道路隔音屏障。利用具有高度属性的建筑向量，使用阴影分析模型和太阳光线跟踪算法来量化相互遮阳和表面倾斜的影响，这些影响显著影响PV的容量因子。利用高分辨率辐照数据、气象参数和辐照模型。平准化电力成本（LCOE）是根据安装成本、运营费用和其他市场驱动的参数进行分析的。结果显示，屋顶、建筑立面和农村居民住宅的光伏发电潜力分别为21,165 GWh/年、85,131 GWh/年和5.43 GWh/年，几乎相当于深圳2023年全年电力需求的94%。可负担性是更大的问题，在不同的场景下，它们的LCOE范围分别为0.020-0.421美元/千瓦时、0.058-0.261美元/千瓦时和0.090-1.404美元/千瓦时。这些发现表明，密集城市的空间限制不仅影响太阳能电力的可用性，更重要的是影响其可负担性。

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引用次数: 0

Wind tunnel investigation of heliostat field wind loads and load reduction measures 定日镜现场风荷载的风洞研究及减载措施

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.renene.2026.125395

Zihang Yang , Yangzhao Liu , Ying Chang , Kaoshan Dai , Jie Zhong , Erhan Huang , Zhen Li , Songgang Li , Matiyas A. Bezabeh

Most prior wind tunnel investigations of heliostats have focused on isolated units. However, in real-world engineering scenarios, heliostats are typically arranged in rows to maximize efficiency, and the aerodynamic properties of multiple heliostats differ substantially from those of an independent or single heliostat. In this study, wind loads in a heliostat field were evaluated using a new type of rectangular heliostat model at multiple locations within the field. On the basis of wind tunnel testing of the heliostat field, a commonly used operating elevation angle of 40° was selected as the most representative elevation angle, and the wind loads of heliostats at different positions in the heliostat field as well as load-mitigation strategies were investigated. The test results showed that the heliostat field could be qualitatively decomposed into two regions, namely an interior region and an edge region, and the worst-case-scenario forces and moments for each heliostat in the interior region were largely identical. On this basis, two wind load reduction measures were considered: optimizing array arrangement at a fixed field density and employing wind fences. The heliostat field exhibited a typical “edge high, internal low” trend in its wind load coefficients. At a given heliostat field density, variation of heliostat structure arrangements had a substantial impact on wind effects. Based on the results, the generalized blockage ratio formula proposed by Peterka et al. was improved, thereby allowing wind load reduction through variations in field arrangement at the same density. In addition, it was found that a wind fence reduces wind loads mainly for edge region heliostats, similarly to adding an upstream heliostat row.

以前大多数对定日镜的风洞研究都集中在孤立的单元上。然而，在现实世界的工程场景中，定日镜通常是成排排列的，以最大限度地提高效率，而多个定日镜的空气动力学特性与独立或单个定日镜的空气动力学特性有很大不同。本文采用一种新型的矩形定日镜模型，对定日镜场内多个位置的风荷载进行了评估。在定日镜场风洞试验的基础上，选取最具代表性的40°工作仰角，研究定日镜在定日镜场不同位置的风荷载及减载策略。试验结果表明，定日镜场可以定性地分解为内部和边缘两个区域，内部区域各定日镜的最坏情况力和力矩基本相同。在此基础上，考虑了固定场强下优化阵列布置和采用风栅两种风荷载降低措施。定日镜场风荷载系数呈现出典型的“边高内低”趋势。在定日镜场密度一定的情况下，定日镜结构布置的变化对风效应有较大影响。在此基础上，对Peterka等人提出的广义堵塞比公式进行了改进，从而可以在相同密度下通过改变场的布置来降低风荷载。此外，研究发现，风栅栏减少风荷载主要是针对边缘区域定日镜，类似于在上游增加定日镜行。

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引用次数: 0

Financial globalization and energy transition: Insights from 149 countries 金融全球化与能源转型：来自149个国家的见解

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-10 DOI: 10.1016/j.renene.2026.125418

Mingming Zhang , Mengyao Cui , Liyun Liu , Dequn Zhou

The energy transition is continuously accelerating worldwide. Financial globalization, related to financing source, investment risk and technology transfer, affects energy transition. This study examines the impact of financial globalization on energy transitions by considering financial globalization using overall, de facto, and de jure measures. A comprehensive energy transition index is constructed based on 3E (energy, environment, and economy) theory. Data from between 2000 and 2019 are collected from 149 countries. A quantile regression panel data model is used and compared with a fixed effects model. The results show that financial globalization has a negative effect on energy transition in medium-energy transition countries but has a positive effect in low- and high-energy transition countries. The impact of financial globalization on energy transition in Europe is higher than that on other continents. The role of financial globalization in Belt and Road countries is more obvious; the Paris Agreement has optimized the role of financial globalization. Financial globalization plays a positive role in countries with low renewable energy consumption and in regions with low degrees of capital formation. Relevant governments should promote financial globalization, optimize the allocation of financial resource, formulate differentiated transition policies and strengthen financial risk management to promote energy transition.

全球能源转型持续加速。金融全球化涉及资金来源、投资风险和技术转移，影响能源转型。本研究考察了金融全球化对能源转型的影响，采用整体、事实上和法律上的衡量标准来考虑金融全球化。基于3E（能源、环境、经济）理论，构建了能源转型综合指数。2000年至2019年的数据收集自149个国家。采用分位数回归面板数据模型，并与固定效应模型进行了比较。研究结果表明，金融全球化对中等能源转型国家的能源转型具有负面影响，而对低能源转型国家和高能源转型国家的能源转型具有积极影响。金融全球化对欧洲能源转型的影响高于其他大洲。金融全球化在“一带一路”沿线国家的作用更为明显；《巴黎协定》优化了金融全球化的作用。金融全球化在可再生能源消费较低的国家和资本形成程度较低的地区发挥着积极作用。各国政府应推进金融全球化，优化金融资源配置，制定差别化转型政策，加强金融风险管理，促进能源转型。

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引用次数: 0

A novel grid-integration strategy for impulsive wave generation with electric-hydrogen system 一种新的电氢系统脉冲波发电并网策略

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.renene.2026.125385

Zhongnan Feng , Xiangning Lin , Fanrong Wei , Quan Sui , Hong Xiang , Kun Yu

Due to the inherent characteristics of wave resources, wave energy generation (WEG) exhibits impulsive characteristics that needs to be smoothed out before being utilized. The degradation loss of a single battery system to consume the impulsive power is significant. Considering the high energy density and storage portability of hydrogen, a hybrid system combining battery and flexible water electrolysis system is a promising choice for wave energy consumption. However, more diverse and complex consumption devices will introduce more operational conflicts and coordination challenges. Therefore, the paper firstly explores the dynamic characteristics of WEG, taking into account the comprehensive external environment and internal control factors. Then, the contradictory boundaries and collaborated domains between the characteristics of impulsive WEG and the consumption devices are clarified through theoretical analysis. Subsequently, a movable electric-hydrogen supplier (MEHS) powered by wave energy was proposed. Considering the requirements of internal multi-energy flow coupling and external multi-spatiotemporal interaction, a scheduling model is established to schedule energy capture, storage, and supply behavior of MEHS. The simulation results show that the proposed flexible scheduling framework can effectively match the dynamic characteristics of different devices, and maximize the utilization of wave energy resources for island microgrids.

由于波浪资源的固有特性，波浪能发电具有脉冲特性，在利用前需要对其进行平滑处理。单电池系统消耗脉冲功率的退化损失是显著的。考虑到氢的高能量密度和存储便携性，将电池与柔性水电解系统相结合的混合系统是一种很有前途的波浪能消纳选择。然而，更加多样化和复杂的消费设备将带来更多的操作冲突和协调挑战。因此，本文首先在综合考虑外部环境和内部控制因素的情况下，探讨WEG的动态特性。然后，通过理论分析，明确了脉冲WEG与消费装置特性之间的矛盾边界和协同域。随后，提出了一种以波浪能为动力的可移动电氢供应器。考虑内部多能量流耦合和外部多时空交互的要求，建立了MEHS能量捕获、存储和供应调度模型。仿真结果表明，所提出的柔性调度框架能够有效匹配不同设备的动态特性，最大限度地利用海岛微电网的波浪能资源。

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引用次数: 0

Cascade hydropower retrofitting for pumped storage in high-penetration renewable energy systems: Techno-economic perspectives 高渗透可再生能源系统中抽水蓄能梯级水电改造：技术经济视角

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-03 DOI: 10.1016/j.renene.2026.125386

Zhenni Wang , Qiaofeng Tan , Xin Wen , Huaying Su , Guohua Fang , Hao Wang

Retrofitting hydropower plants with pumping stations (HPSH-P), reversible units (HPSH-PT), or new reservoirs (PSH) is critical for boosting grid flexibility and variable renewable energy (VRE) integration. However, comparative multi-scale operational characteristics and techno-economic trade-offs among these pathways remain underexplored. This study develops a scheduling model that captures multi-scale regulation for these retrofitting approaches, driven by a net-load-based time-of-use price curve. The performance of different pathways is further evaluated through techno-economic and sensitivity analyses, considering hydrological inflows, economic parameters, and round-trip efficiency. A Southwest China case study reveals that HPSH-P provides a cost-effective near-term solution for capital-constrained or low-capacity-factor plants. In contrast, HPSH-PT achieves a peak net present value of 7.0 billion CNY by effectively leveraging existing storage and expanded capacity at moderate investment. While PSH delivers superior technical performance, with an overall energy conversion efficiency of 79.8%, a VRE curtailment absorption rate of 9.9%, and an annual greenhouse gas reduction of 10.5 Mt CO₂-eq, substantial capital costs for new reservoirs raise its break-even threshold. Notably, all schemes at their optimal capacities exhibit competitive levelized cost of energy (LCOE) below 200 CNY/MWh. These findings provide a systematic framework for transforming conventional hydropower into flexible, low-carbon energy storage assets.

用泵站（HPSH-P）、可逆机组（HPSH-PT）或新水库（PSH）改造水电站对于提高电网灵活性和可变可再生能源（VRE）的整合至关重要。然而，这些途径之间的比较多尺度操作特征和技术经济权衡仍未得到充分探讨。本研究开发了一个调度模型，该模型在基于净负荷的使用时间价格曲线的驱动下，捕捉了这些改造方法的多尺度调节。考虑到水文流入、经济参数和往返效率，通过技术经济和敏感性分析进一步评估了不同路径的性能。中国西南地区的一个案例研究表明，HPSH-P为资金紧张或低产能要素的工厂提供了一个具有成本效益的短期解决方案。相比之下，HPSH-PT在适度投资的情况下，通过有效利用现有存储和扩容容量，实现了70亿元的峰值净现值。虽然PSH具有卓越的技术性能，整体能源转换效率为79.8%，VRE弃风吸收率为9.9%，每年温室气体减排1050万吨二氧化碳当量，但新水库的大量资本成本提高了其盈亏平衡门槛。值得注意的是，所有方案在其最优容量下均表现出低于200元/兆瓦时的竞争性平准化能源成本（LCOE）。这些发现为将常规水电转变为灵活的低碳能源储存资产提供了一个系统框架。

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引用次数: 0

Simultaneous saccharification and co-fermentation of dilute acid co-pretreated corn straw and tapioca starch with low enzyme dosage for enhanced lipid production by Cutaneotrichosporon oleaginosum 低酶量稀酸共预处理玉米秸秆与木薯淀粉同时糖化共发酵，提高油酸三磷酸皮霉产脂率

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-01-30 DOI: 10.1016/j.renene.2026.125343

Shujiang Ran , Yanan Wang , Wenting Zhou , Tianyan Zhong , Bo Wu , Zhengzai Cheng , Zhiwei Gong

Due to the structural recalcitrance and relatively high nitrogen content of corn straw, the supplementation of additional carbon sources is probably meaningful to alleviate sugar limitation during the simultaneous saccharification and co-fermentation (SSCF) and increase the carbon-to-nitrogen ratio beneficial for lipid overproduction by oleaginous yeasts. Here, the dilute sulfuric acid co-pretreatment of a corn straw and tapioca starch mixture as co-substrates, followed by direct SSCF without detoxification, was first described for lipid production by Cutaneotrichosporon oleaginosum. Tapioca starch was almost completely degraded into fermentable sugars via the dilute acid co-pretreatment, which provided sufficient initial sugars for microorganisms. The combination of co-pretreatment with the SSCF using a mixed substrate of 40 g/L corn straw and 40 g/L tapioca starch allowed an extremely low enzyme dosage of 1 FPU/g for lipid production, resulting in 12.7 g/L of lipid and 0.11 g/L/h of lipid productivity. The biodiesel parameters of the lipids produced by C. oleaginosum matched those of the European and U.S. biodiesel standards. This study provides a novel combination strategy to simplify the process, reduce enzyme input, and improve lipid production, which is valuable for the commercial viability of lipid technology.

由于玉米秸秆的结构顽固性和相对较高的氮含量，补充额外的碳源可能对缓解同时糖化和共发酵（SSCF）过程中的糖限制，提高碳氮比有利于产油酵母过量生产油脂有意义。本文首次描述了将玉米秸秆和木薯淀粉混合物作为共底物进行稀硫酸共预处理，然后进行不解毒的直接SSCF，用于油酸皮三磷酸丝氨酸产脂。经稀酸共预处理，木薯淀粉几乎完全降解为可发酵糖，为微生物提供了充足的初始糖。使用40 g/L玉米秸秆和40 g/L木薯淀粉混合底物与SSCF联合进行共预处理，使产脂酶用量极低，为1 FPU/g，产脂率为12.7 g/L，产脂率为0.11 g/L/h。产脂的生物柴油参数符合欧美生物柴油标准。本研究提供了一种新的组合策略，以简化工艺，减少酶的投入，提高脂质产量，这对脂质技术的商业可行性有价值。

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引用次数: 0

Numerical investigation on the hydrodynamics and wake characteristics of ducted and bare tidal turbines under wave conditions 波浪条件下导管式和裸露式潮汐涡轮机水动力和尾迹特性的数值研究

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.renene.2026.125398

Yunlei Mei , Fengmei Jing , Xinru Wang , Bin Guo , Qiang Lu

This study uses computational fluid dynamics to compare the hydrodynamics and wake characteristics of a bare turbine versus a ducted turbine under wave conditions. By developing and validating a coupled wave-current numerical model, this study systematically analyses the influence of wave and submergence depth on the loadings, power output, and wake evolution of both turbines. The results show that the ducted turbine achieved a higher average power output and effectively suppressed the fluctuations in rotor thrust and power. Across the investigated cases, the ducted turbine achieves an average power coefficient about 65%-69% higher than the bare turbine, with a more evident advantage at higher wave heights. Concerning the wake characteristics, compared to the bare turbine, the near-wake diameter of the ducted turbine increased by approximately 60%, exhibiting a more pronounced velocity deficit, with a maximum difference of approximately 40% at 2D downstream. However, its wake recovered faster, exceeding the bare turbine's wake recovery level by 8D downstream. Furthermore, the influence of waves on wake recovery was limited, improving the recovery rate by approximately 8% within the parameter range of this study. The findings indicate that the ducted turbine provides superior overall performance in wave environments; however, its structural design must prioritise the dynamic loads induced by waves. This study provides theoretical insights and data support for the design and array arrangement of ducted turbines in complex marine environments.

本研究使用计算流体力学比较了波浪条件下裸涡轮和导管涡轮的水动力和尾迹特性。通过建立和验证波浪流耦合数值模型，本研究系统地分析了波浪和淹没深度对两台涡轮机负荷、功率输出和尾迹演变的影响。结果表明，该导管式涡轮获得了较高的平均功率输出，有效地抑制了转子推力和功率的波动。在调查的案例中，导管式水轮机的平均功率系数比裸水轮机高65%-69%，在高浪高时优势更明显。在尾迹特性方面，与裸涡轮相比，导管式涡轮的近尾迹直径增加了约60%，速度亏缺更为明显，在下游2D处最大差值约为40%。但其尾迹恢复速度较快，在下游超过裸涡轮的尾迹恢复水平8D。此外，波浪对尾迹回收的影响有限，在本研究的参数范围内，回收率提高了约8%。研究结果表明，导管式水轮机在波浪环境中具有优越的综合性能；然而，其结构设计必须优先考虑波浪引起的动荷载。该研究为复杂海洋环境下导管式涡轮的设计和阵列布置提供了理论见解和数据支持。

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引用次数: 0

Spectral-absorptance-based temperature model and its differentiated performance in commercial crystalline silicon PV modules 基于光谱吸收的温度模型及其在商用晶硅光伏组件中的差异化性能

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-06 DOI: 10.1016/j.renene.2026.125401

Xinyue Cao , Yifan Xu , Min Gui , Yanfang Zhou , Xiang'an Zeng , Zhen Zhang , Ming Liu , Lei Wang , Junzhi Yan , Jianing Cao

This study proposes a spectral-corrected PV module temperature model that explicitly accounts for wavelength-dependent absorption over 280–2500 nm, including sub-bandgap absorption as a direct thermal source. The model is parameterized using measured absorptance spectra of bifacial PERC, HJT, and TOPCon modules and validated with outdoor measurements from six commercial modules. The results demonstrate improved predictive performance, with root-mean-square errors reduced by up to 0.11 for PERC modules and maximum temperature deviations limited to 1.64 °C. Incorporating spectral absorption consistently enhances temperature prediction accuracy and mitigates systematic bias across a wide range of irradiance levels, air masses, and ground reflectance conditions. Neglecting spectral mismatch leads to temperature overestimation of up to 0.3 °C at large air masses (AM 10), while installation-related effects further amplify deviations to 0.94 °C over high-albedo surfaces such as snow. Beyond accuracy gains, the model reveals distinct technology-dependent thermal behavior, with HJT modules operating at slightly higher temperatures than PERC and TOPCon, and these differences becoming more pronounced under high irradiance and high-albedo environments.Overall, the proposed approach provides a physically consistent framework for PV thermal modeling, enabling more reliable temperature inputs for energy yield simulations and improved assessment of temperature-driven degradation risks in modern crystalline-silicon PV systems.

本研究提出了一个光谱校正的光伏组件温度模型，该模型明确考虑了280-2500 nm波段的波长相关吸收，包括作为直接热源的亚带隙吸收。该模型通过测量双面PERC、HJT和TOPCon模块的吸收光谱进行参数化，并通过六个商用模块的室外测量进行验证。结果表明，预测性能得到了改善，PERC模块的均方根误差减少了0.11，最大温度偏差限制在1.64°C。结合光谱吸收可以持续提高温度预测的准确性，并减轻在大范围的辐照度水平、气团和地面反射条件下的系统偏差。忽略光谱失配会导致在大气团（am10）时温度高估高达0.3°C，而安装相关的影响会进一步放大偏差，在高反照率表面（如雪）上偏差达到0.94°C。除了精度提高之外，该模型还揭示了不同的技术相关热行为，HJT模块的工作温度略高于PERC和TOPCon，这些差异在高辐照度和高反照率环境下变得更加明显。总的来说，所提出的方法为光伏热建模提供了一个物理上一致的框架，为能量产出模拟提供了更可靠的温度输入，并改进了现代晶体硅光伏系统中温度驱动退化风险的评估。

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引用次数: 0

An improved discrete equivalent circuit model for power assessment of bifacial half-cell photovoltaic module under front shading 正面遮阳下双面半电池光伏组件功率评估的改进离散等效电路模型

IF 9.1 1区工程技术 Q1 ENERGY & FUELS

Renewable Energy

Pub Date : 2026-04-15 Epub Date: 2026-02-05 DOI: 10.1016/j.renene.2026.125389

Shi-Jie Xu , Shuang-Ying Wu , Lan Xiao , Yan Hu

Bifacial photovoltaic modules may operate under partial shading conditions, making the electrical characteristics assessment modeling particularly important. This study aimed to develop and validate an improved discrete equivalent circuit model for bifacial half-cell photovoltaic modules that explicitly accounts for non-uniform irradiance and temperature at half-cell element level. The detailed topological circuit of bifacial half-cell photovoltaic module was implemented in MATLAB/Simulink and bidirectionally coupled with the thermal field of each half-cell element obtained from finite-volume model, enabling dynamic thermal-electrical coupling simulation under front shading conditions. The model validation was conducted through outdoor experiments under different front shading ratios and patterns, and comparisons with conventional discrete equivalent circuit and average temperature models. The results show that average temperature and conventional discrete equivalent circuit models are more suitable for predicting electrical power under non-shading conditions and cannot accurately reflect the circuit reconstruction and nonlinear current-voltage features caused by partial shading. However, improved discrete equivalent circuit model accurately restores non-uniform irradiance and temperature distributions, captures the activation of bypass diodes and the associated multi-knees current-voltage behavior. The average relative error of power and root mean square error of current are less than 6.5% and 0.56 A, respectively, for different operating conditions. This study provides a half-cell element-based modeling approach for evaluating the electrical performance of bifacial half-cell photovoltaic module, offering guidance for module layout design, shaded operation, and accurate power output prediction of bifacial photovoltaic systems.

双面光伏组件可以在部分遮阳条件下运行，使得电气特性评估建模特别重要。本研究旨在开发和验证一种改进的双面半电池光伏组件离散等效电路模型，该模型明确地说明了半电池元件水平的非均匀辐照度和温度。在MATLAB/Simulink中实现了双面半电池光伏组件的详细拓扑电路，并与有限体积模型得到的各半电池单元的热场进行了双向耦合，实现了正面遮阳条件下的动态热电耦合仿真。通过不同遮阳比例和遮阳模式下的室外实验对模型进行验证，并与传统的离散等效电路和平均温度模型进行比较。结果表明，平均温度和传统的离散等效电路模型更适合于无遮阳条件下的电力预测，但不能准确反映部分遮阳引起的电路重构和非线性电流-电压特征。然而，改进的离散等效电路模型准确地恢复了非均匀的辐照度和温度分布，捕获了旁路二极管的激活和相关的多膝电流-电压行为。在不同工况下，功率的平均相对误差小于6.5%，电流的均方根误差小于0.56 A。本研究为双面半电池光伏组件的电性能评估提供了一种基于半电池单元的建模方法，为双面光伏系统的组件布局设计、遮阳运行和准确的功率输出预测提供指导。

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引用次数: 0