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Journal of energy Chemistry 2025年第1期100卷 621-627页

作者： Fei Lv Longjie Liu Jiazhe Wu Pengfei Wang Lixia Pan Dengwei Jing Yubin Chen International Research Center for renewable energy State Key Laboratory of Multiphase Flow in Power Engineering Xi'an Jiaotong University

Combining water electrolysis and rechargeable battery technologies into a single system holds great promise for the co-production of hydrogen （H2） and ***,the design and development of such systems is still in its ***,an integrated hydrogen-oxygen （O2）-electricity co-production system featuring a bipolar membrane-assisted decoupled electrolyzer and a Na-Zn ion battery was established with sodium nickelhexacyanoferrate （NaNiHCF） and Zn2+/Zn as dual redox *** decoupled electrolyzer enables to produce H2and O2in different time and space with almost 100%Faradaic efficiency at 100 mA ***,the charged NaNiHCF and Zn electrodes after the electrolysis processes formed a Na-Zn ion battery,which can generate electricity with an average cell voltage of 1.75 V at 10 m A *** connecting Si photovoltaics with the modular electrochemical device,a well-matched solar driven system was built to convert the intermittent solar energy into hydrogen and electric energy with a solar to hydrogen-electricity efficiency of 16.7%,demonstrating the flexible storage and conversion of renewables.

关键词： Hydrogen Electricity Decoupled water electrolyzer Na-Zn ion battery Solar energy

Present status of pumped hydro storage operations to mitigate renewable energy fluctuations in Japan

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Global energy Interconnection 2019年第5期2卷 424-429页

作者： Shota Ichimura Seiichiro Kimura renewable energy institute

This paper focuses on pumped hydro energy storage(PHES)plants’current operations after electricity system reforms and variable renewable energy(VRE)installations in *** plants have historically been developed to create electricity demand at night in order to operate base load power plants,such as nuclear power plants,in stable ***,many PHES plants are located midway between nuclear power plants and large demand ***,all nuclear power plants had to–at least temporarily–shut down after the Great East Japan Earthquake followed by a nuclear accident at Fukushima Daiichi in 2011,and renewable energy power plants have been deployed rapidly after the introduction of a feed-in-tariff(FIT)***,PHES plants are being used to mitigate fluctuations of VRE,especially in areas where renewable energy has been significantly *** daily highest capacity ratio of PHES plants in Kyushu area has recorded three times higher than it in the other areas where the past operating mode is still *** those operations on PHES plants are simply followed as a dispatch rule of the Organization for Crossregional Coordination of Transmission Operators(OCCTO),market-based operations have not been conducted enough *** market design shall be changed to harmonize VRE installation and PHES plants’operations are necessary to make the transition from the past operating mode of PHES plants across Japan.

关键词： Pumped hydro energy storage plant Nuclear power plant Variable renewable energy Solar photovoltaic Marketdesign

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KPI-based Real-time Situational Awareness for Power Systems with a High Proportion of renewable energy Sources

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CSEE Journal of Power and energy Systems 2022年第4期8卷 1060-1073页

作者： Tianhan Zhang Shengyuan Liu Weiqiang Qiu Zhenzhi Lin Lingzhi Zhu Zhao Dawei Minhui Qian LI Yang College of Electrical Engineering Zhejiang UniversityHangzhou 310027China renewable energy Research Center China Electric Power Research Institute(State Key Laboratory of Operation and Control of Renewable Energy&Storage SystemsJiangsu Engineering Technology Research Center for Energy Storage Conversion and Application)Nanjing 210003China

With the increasing complexity of power systems and the widespread penetration of renewable energy sources(RES),real-time situational awareness for power systems is of great significance for operational *** the impact of RES on power system operations,a situational awareness key performance index(KPI)system for power systems with a high proportion of RES is proposed in this paper,which consists of reserve capacity abundance,ramp resource abundance,center of inertia(COI)frequency deviation,interface power flow margin,synthesized voltage stability,and angle stability ***,the KPIs are synthesized and visualized by the decision tree method and radar chart method,respectively,for monitoring the operation states(i.e,normal,alert,and emergency states)of power systems with a high proportion of *** simulations are conducted in a revised New England 16-machine 68-bus power system and an actual CEPRI-RE power system in the northwest region of China with a high proportion of *** results show that the proposed KPI-based situational awareness method is able to accurately monitor the real-time state of power systems with a high proportion of RES,and can assist power dispatchers to make effective decisions.

关键词： High proportion of renewable energy sources(RES) key performance index(KPI) situational awareness state visualization

Integrating high levels of variable renewable energy into electric power systems

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Journal of Modern Power Systems and Clean energy 2017年第6期5卷 831-837页

作者： Benjamin KROPOSKI National renewable energy Laboratory GoldenCO 80401USA

As more variable renewable energy(VRE)such as wind and solar are integrated into electric power systems,technical challenges arise from the need to maintain the balance between load and generation at all *** paper examines the challenges with integrating ultrahigh levels of VRE into electric power system,reviews a range of solutions to these challenges,and provides a description of several examples of ultra-high VRE systems that are in operation today.

关键词： High penetration Variable renewable energy Grid operation Wind Solar

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Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

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Journal of energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao Shi Ying Zhao Xiaodan Zhang institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University Key Laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe Laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Inverted inorganic perovskite solar cells Flexible molecules Strain release Crystallization energy barrier High PCE

Large-Scale renewable energy Transmission by HVDC: Challenges and Proposals

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Engineering 2022年第12期19卷 252-267页

作者： Weisheng Wang Guanghui Li Jianbo Guo State Key Laboratory of the Operation and Control of renewable energy and Storage Systems China Electric Power Research InstituteBeijing 100192China

renewable energy transmission by high-voltage direct current(HVDC)has attracted increasing attention for the development and utilization of large-scale renewable energy under the Carbon Peak and Carbon Neutrality Strategy in ***-penetration power electronic systems(HPPESs)have gradually formed at the sending end of HVDC *** operation of such systems has undergone profound changes compared with traditional power systems dominated by synchronous *** stability issues,such as broadband oscillation and transient over-voltage,have emerged,causing tripping accidents in large-scale renewable energy *** analysis methods and design principles of traditional power systems are no longer suitable for *** this paper,the mechanisms of broadband oscillation and transient over-voltage are revealed,and analytical methods are proposed for HPPESs,including small-signal impedance analysis and electromagnetic transient *** of the theoretical research has been accomplished through its application in several practical projects in north,northwest,and northeast region of ***,suggestions for the construction and operation of the future renewable-energy-dominated power system are put forward.

关键词： Broadband oscillation Future power system HVDC transmission renewable energy generation Transient over-voltage

揭示钙钛矿前驱体溶液的胶体组成及其对成膜的影响（英文）

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Science China Materials 2025年第1期 156-164页

作者：娄甜甜陈乐添杨桂春陈鹏赵文燕李红时李国然 School of Materials Science and Engineering Institute of New Energy Material Chemistry Renewable Energy Conversion and Storage Center Nankai University School of Mechanical and Electronic Engineering Jingdezhen Ceramic University

胶体是钙钛矿前驱体溶液的重要组成部分,对钙钛矿的成膜质量有重大影响.在这项工作中,我们探索了两种不同类型前驱体的胶体成分:原料单体混合溶解(MMD)和预合成的钙钛矿单晶再溶解(SCR).我们发现了一种新的溶解化学平衡机制,即从混合单...

胶体是钙钛矿前驱体溶液的重要组成部分,对钙钛矿的成膜质量有重大影响.在这项工作中,我们探索了两种不同类型前驱体的胶体成分:原料单体混合溶解(MMD)和预合成的钙钛矿单晶再溶解(SCR).我们发现了一种新的溶解化学平衡机制,即从混合单体到3C立方相(α相)的转变涉及一个可逆的转变过程. MMD的方法产生了多聚Pb-I溶剂化胶束,而SCR方法产生的则是六方卤化铅基的钙钛矿胶体,这种胶体组成的差别显著影响了成膜质量.值得注意的是,六方相胶体是有利的成核位点,可促进形成晶粒更大、相更均匀、缺陷更少的α相钙钛矿薄膜.这项工作证明了调控胶体成分的重要性,并从理论上深入探讨了以粉末、微晶和单晶等形式重新溶解钙钛矿的有利影响.

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China’ s strategies and initiatives to foster high-quality leaping development of renewable energy

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ienergy 2022年第2期1卷 149-150页

作者： Chuangjun Li Department of New and renewable energy National Energy Adminis-trationBeijing 100045China

Chinese authorities have pledged to achieve carbon neutrality by 2060 and peak carbon dioxide emissions before *** compared with developed countries,China has a much shorter period to achieve its climate *** strategic plan is to construct clean and low-carbon energy production and con-sumption systems and promote the high-quality development of renewable ***-quality development is characterized by its technological,economical,and sustainable features.

关键词： energy dioxide foster

Simultaneous Optimization of renewable energy and energy Storage Capacity with the Hierarchical Control

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CSEE Journal of Power and energy Systems 2022年第1期8卷 95-104页

作者： Zhaodi Shi Weisheng Wang Yuehui Huang Pai Li Ling Dong State Key Laboratory of Operation and Control of renewable energy and Storage Systems China Electric Power Research InstituteBeijing 100192China State Grid Qinghai Electric Power Company Xining 810000China

To fully consider the complementary role of different energy sources and reduce the curtailment of renewable energy(RE)in high RE penetration systems,a hierarchical optimization algorithm is proposed to simultaneously optimize the capacity of RE generation and energy storage systems(ESS).Time sequence simulation(TSS)technology is adopted to fully consider the regional RE resource characteristics and make the model more *** optimization model for evaluating ESS capacity is established at a lower *** overcome the high dimensional complexity of time sequence data,this paper re-formulates this sub-model as a consensus problem,which can be solved by a distributed approach to minimize the system’s total investment *** the upper level,the model for assessing the proportion of wind and solar capacity is developed by maximizing the RE *** golden section Fibonacci tree optimization(GSFTO)algorithm is utilized to improve the efficiency and solution *** results show that the algorithm and model are feasible and applicable for the identified purposes,which can provide a useful guidance for the development of power generation and the energy storage capacity in high RE penetration systems.

关键词： Consensus problem energy storage planning renewable time sequence simulation(TSS)

Oxygen vacancies enriched Ir/WOx catalysts for the directly chem-catalytic conversion of cellulose to ethanol

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Tungsten 2025年第1期 88-99页

作者： Yu-Jing Weng Zhao-Ying Ding Ying-Chao Li Yuan-Feng Wu Yuan-Yang Xu Rui Chen Xiao-Lei Zhao Hai-Yong Wang Da-Lei Zhang Yu-Long Zhang Henan Key Laboratory of Coal Green Conversion and International Joint Laboratory of Coal Clean Utilization College of Chemistry and Chemical Engineering Henan Polytechnic University Key Laboratory of renewable energy Guangzhou Institute of Energy Conversion Chinese Academy of Sciences Liaoning institute of energy Technology

Tungsten and its oxides are highly versatile catalysts with unique properties that hold great promise for a wide array of applications,including biological pathways and chemical *** chemo-catalysis of cellulose to ethanol presents a promising avenue for ethanol synthesis with the potential for enhanced efficiency compared to conventional methods,offering a sustainable and carbon-neutral alternative to existing petrochemical and biological ***,Ir/WOxcatalysts enriched with oxygen vacancies were meticulously prepared and demonstrated remarkable catalytic performance in converting cellulose to ethanol directly in the presence of tungstic *** catalyst achieved a high ethanol yield of 66.5%under optimal reaction conditions,approaching the theoretical yield limit of traditional ethanol *** results revealed the presence of oxygen defects,Bronsted/Lewis acidity,and Ir nanoclusters on the catalyst surface,working synergistically to facilitate the cascade catalysis of cellulose hydrolysis,sugar retro-aldol condensation reaction,and C2 intermediate hydrodeoxygenation to *** situ Fourier transform infrared spectrometer analysis confirmed the catalyst's ability to enhance the adsorption and activation of ethylene glycol for ethanol *** manipulating subtle structural features,this study offers a fresh perspective on tungsten group catalyst design and underscores the importance of synergistic effects among catalytic sites for the efficient production of ethanol from cellulose.

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