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Optimization Model for Inter-regional Emergency Power Dispatch Considering Transmission Rights Allocation

Dianwang Jishu/Power System Technology 2025年第1期49卷 223-231页

作者： Guan, Jinyu liang, Zhifeng Chang, li Cao, Rongzhang li, lili NARI Group Corporation State Grid Electric Power Research Institute Jiangsu Province Nanjing 211106 China NARI Technology Co. Ltd. Jiangsu Province Nanjing 211106 China Department of Electrical Engineering Tsinghua University Haidian District Beijing 100084 China National Power Dispatch and Control Centre Xicheng District Beijing 100031 China

Inter-regional emergency power dispatch refers to the mandatory fallback guarantee measures for ensuring supply or absorption of emergency demands within provincial grids when market-based approaches have been exhausted from the perspective of mutual assistance in electricity surplus and shortage across provinces and regions. When it is impossible to rely on market declarations directly, how to allocate emergency demands and inter-provincial/regional support capacities and distribute the limited available transfer capacity reasonably among market entities is one of the key issues urgently needing to be addressed in current emergency dispatch. This paper proposes an optimization model for inter-provincial and inter-regional emergency power dispatch considering transmission rights. Inspired by China's current mechanism for allocating transmission channel revenue rights, based on local prioritization and the urgency of emergency demands, a method for determining the priority of emergency transactions considering transmission rights allocation is proposed. This method transforms transmission rights into priority transaction rights, addressing the lack of a reasonable basis for transmission capacity allocation in the emergency dispatch phase. Considering constraints such as available transfer capacity, transaction flow balance, and transaction point power balance constraints, to maximize adjusted social welfare, a clearing model for emergency dispatch optimization considering transaction path priority is constructed. Comparative analysis of the optimization results of three 1e clearing modes, price-based sequential clearing, scenario-based separation, and clearing with transaction path priority, validates the effectiveness and superiority of the proposed optimization clearing model and analyzes the impact of related parameter settings on the clearing results. © 2025 Power System Technology Press. All rights reserved.

关键词： Commerce

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Anti-asynchrony output regulation for switched systems under switching-Q-learning event-triggering against DoS attacks

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Science China(Information Sciences) 2024年第11期67卷 194-210页

作者： lili li Yalin CHEN Dan MA Qingjun GUO College of Marine Electrical Engineering Dalian Maritime University State Key Laboratory of Synthetical Automation for Process Industries Northeastern University College of Information Science and Engineering Northeastern University

This paper proposes a secure output regulation(SOR) scheme for network switched systems(NSSs) experiencing severely unstable dynamics(SUDs). This scheme aims to address the complex consecutive asynchrony caused by long-duration denial-of-service(LDDoS) attacks. When the denial-of-service(DoS) attack lasts longer than the dwell time of each subsystem, switching to a new subsystem is necessary to manage the unstable dynamic behavior caused by SUDs. The controller cannot immediately obtain information about the new modality. However, owing to the delayed access to new modality information by the controller, consecutive asynchrony occurs. To tackle this, we propose a resilient switching rule that mitigates the impact of consecutive asynchrony by choosing the optimal subsystem once the minimum dwell time is met. Multi-stage event-triggering mechanisms(METMs) are proposed to coordinate with switching signals by incorporating modality matching conditions and a switching-Q-learning algorithm. These mechanisms reduce asynchronous durations by aligning modality matching conditions and terminating attacks using attack parameters. This control scheme for SOR of NSSs with SUDs disturbed by LDDoS attacks provides a detailed analysis of dynamic switching behavior, leveraging the resilient switching rule and METMs. Finally,the feasibility of the proposed methodology is substantiated through simulations with an F-18 aircraft model.

关键词： switched systems long-duration DoS attacks consecutive asynchrony switching-$Q$-learning algorithm multi-stage event-triggering resilient switching rule

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Effect analysis of the intentional depressurization on fission product behavior during TMLB' severe accident

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Nuclear Science and Techniques 2009年第6期20卷 373-379页

作者： HUANG Gaofeng li Jingxi TONG lili CAO Xuewu School of Mechanical Engineering Shanghai Jiaotong University Shanghai 200240 China

It has been found that the pressure in the reactor coolant system (RCS) remains high in some severe accident sequences at the time of reactor vessel failure, with the risk of causing direct containment heating (DCH). Intentional depressurization is an effective accident management strategy to prevent DCH or to mitigate its consequences. Fission product behavior is affected by intentional depressurization, especially for inert gas and volatile fission product. Because the pressurizer power-operated relief valves (PORVs) are latched open, fission product will transport into the containment directly. This may cause larger radiological consequences in containment before reactor vessel failure. Four cases are selected, including the TMLB' base case and the opening one, two and three pressurizer PORVs. The results show that inert gas transports into containment more quickly when opening one and two PORVs, but more slowly when opening three PORVs; more volatile fission product deposit in containment and less in reactor coolant system (RCS) for intentional depressurization cases. When opening one PORV, the phenomenon of revaporization is strong in the RCS.

关键词：裂变产物控制产品严重事故减压故意行为反应堆冷却剂系统雷达散射截面

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Finite p-groups with a minimal non-abelian subgroup of index p(Ⅱ)

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Science China Mathematics 2014年第4期57卷 737-753页

作者： AN liJian li lili QU HaiPeng ZHANG QinHai School of Mathematics and Computation Science Shanxi Normal University School of Mathematics and Computation Science Zhanjiang Normal University

We classify completely three-generator finite p-groups G such that Ф(G)≤Z(G)and|G′|≤*** paper is a part of the classification of finite p-groups with a minimal non-abelian subgroup of index p,and solve partly a pr... 详细信息

关键词： minimal non-abelian p-groups At-groups congruent relation sub-congruent relation

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Effects of Sand Grain Size on Habitat Selection in Steppe Toad-headed lizard(Phrynocephalus frontalis)

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Asian Herpetological Research 2017年第2期18卷 123-130页

作者： Shengnan JI Xue liAN Zhigang JIANG lili li Junhuai BI Chunwang li Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences College of life Science Inner Mongolia Normal University College of life Science University of Chinese Academy of Sciences

To understand the effects of sand grain size on habitat selection, we conducted a field study on the steppe toad-headed lizard in Hunshandake Desert northern China. Methods of mark-recapture and transect survey were used to investigate the density of steppe toad-headed lizards and the environmental variables. The comparison on lizard densities among the habitats with different environmental factors revealed that： 1） population density of the steppe toad-headed lizard differed significantly among the habitats with different sand grain size indexes（SGSIs, representing roughness of sand substrate）： the highest lizard density was found in the group with an SGSI of 〉 0.30, whereas the lowest density was found in the group with an SGSI of 0–0.15; and 2） vegetation cover, soil moisture, invertebrate diversity index, and abundance had no significant effects on the lizard density. These results implied that the sand grain size was the most important determinant of habitat selection for steppe toad-headed lizards in Hunshandake Desert. Steppe toad-headed lizards could avoid structural habitats that have negative effects on their maximal sprinting capabilities. Considering the changing sand grain size in the development phase of sand dunes, the sand lizard could be used as an indicator of the process of desertification.

关键词： habitat preference agama lizard sand substrate desert grassland

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Abnormal lattice occupation of Mo and related polarons in liNbO_(3): Hybrid density functional theory investigation

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Journal of Materiomics 2020年第1期6卷 183-191页

作者： lili li Yanlu li Xian Zhao Xiufeng Cheng Yongjun Fan Institute of Crystal Matierials and State Key Laboratory of Crystal Materials Shandong UniversityJinanShandong250100China Center for Optics Research and Engineering of Shandong University Shandong UniversityJinanShandong250100China

Studies have reported that Mo-doped liNbO_(3) exhibits excellent photorefractive performance,which may be attributed to the Mo abnormally occupation in Nb sites(MoNb)and the MoNb photorefractive ***,we investigate the basic characteristics of Mo-doped liNbO_(3),including the preferable substitutional sites,doping stability,lattice relaxation,and electronic structures using the spin-polarised density functional theory within semi-local and hybrid ***,the type and properties of the polarons in Mo-doped liNbO_(3) are studied intensively,and the advantages of MoNb polarons with respect to the Moli polarons are *** calculation results of both transfer energies and defect formation energies show that MoNb are preferable to be formed in both stoichiometric and congruent liNbO_(3),while Mo substitutional li(Moli)is consumed in small *** could act as small bound polarons that exhibit fast response to light with respect to the Moli bound *** introduced double-centre by Mo doping is partly responsible for the excellent photorefractive properties of Mo-doped liNbO_(3).

关键词： Density functional theory Electronic property Polaron Mo-doped liNbO_(3)

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Encumbering the intramolecular π donation by using a bridge: A strategy for designing metal-free compounds to hydrogen activation

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Chinese Science Bulletin 2010年第3期55卷 239-245页

作者： WANG ZhiXiang LU Gang li HaiXia ZHAO lili College of Chemistry and Chemical Engineering Graduate University of Chinese Academy of Sciences Beijing 100049 China

On the basis of the FLP (frustrated Lewis pair) principle, a new strategy has been proposed to construct the "frustration" in de- signing metal-free hydrogen activation compounds, by using FMO (frontier molecular orbital) analyses and quantum mechanics calculations. Unlike the known FLPs which use bulky substituents to prevent them from forming stable Lewis acid/base com- plexes, the new approach encumbers the intramolecular π donation from the electron donor to the acceptor (e.g. in BH2NH2) by using a CH2 bridge (giving BH2CH2NH2). The strategy is simple and effective. Its effectiveness is demonstrated by the small hy- drogen activation energy (12.0 kcal/mol) of the model molecule (BH2CH2NH2), which is significantly less than the 42.7 kcal/mol of BH2NH2 and also less than the 18.5 kcal/mol of BH2PH2 whose derivative, R2PB(C6F5)2, has been experimentally shown to be able to activate hydrogen. We also exemplified how to use the strategy to design experimentally more realizable molecules. The example shows promises as a hydrogen activation agent. The strategy can be used to design metal-free catalysts for direct hydro-genation.

关键词：金属化合物设计实验氢化合物分子内活化能量子力学计算前线分子轨道路易斯酸

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Role of Epstein-Barr Virus Encoded Latent Membrane Protein 1 in the Carcinogenesis of Nasopharyngeal Carcinoma

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Cellular & Molecular Immunology 2007年第3期4卷 185-196页

作者： Hui Zheng lili li Duosha Hu Xiyun Deng Ya Cao Cancer Research Institute Xiangya School of Medicine Central South University Changsha Hunan China

Epstein-Barr virus （EBV）-encoded latent membrane protein 1 （LMPI） has been known to have oncogenic properties during latent infection in nasopharyngeal carcinoma （NPC）. Our studies focused on the role of LMP1 in NPC, and showed that LMP1 triggers the NF-κB, AP-1 and STAT signaling pathways. Strikingly, LMP1 was found to mediate the formation of a new heterodimer between c-Jun and JunB. Also, we have identified JAK/STAT and PI-PLC-PKC activation triggered by LMP1 through upregulating the expression of JAK3 and enhancing the phosphorylation of STATo The constitutive activation of these signaling cascades explains LMP1＇s ability to induce such a diverse array of morphological and phenotypic effects in cells and provides insight into how LMP1 may induce cell transformation, in which multihit targeted genes in the downstream play an essential role. All signaling cascades triggered by LMP1 ultimately lead to the disruption of the cell cycle： the acceleration of G1/S phase and the arrest of G2/M phase. We also found that LMP1 induced the expression of hTERT and promoted cell immortalization. Importantly, by intervening physical intracellular signal transduction pathways and disturbing the progression of the cell cycle, LMP1, an important oncoprotein encoded by EBV, is thought to be a key modulator in the pathogenesis of NPC. Interfering LMP1 signaling could be a promising strategy to target the malignant phenotype of NPC. Cellular ＆ Molecular Immunology.

关键词： latent membrane protein 1 nasopharyngeal carcinoma signal transduction

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Response of grain size of Quaternary gravels to climate and tectonics in the northern Tibetan Plateau

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Science China Earth Sciences 2007年第1期50卷 81-91页

作者： FU KaiDao FANG XiaoMin GAO JunPing HAN WenXia li lili MOE National Laboratory of Western China’s Environmental Systems&College of Resource and Environment Lanzhou UniversityLanzhou 730000China Institute of Tibetan Plateau Research Chinese Academy of SciencesBeijing 100085China 不详

The widely distributed thick gravel deposits along the rim of the Tibetan Plateau have been long thought to be the product of rapid tectonic uplift of the plateau. However, this has been challenged by recent works that suggest these thick gravels may be the result of climate change. In this paper we carried out a detailed field measurement of gravel grain sizes from the Jiuquan and Gobi Gravel Beds in the top of the Laojunmiao section in the Jiuxi Basin in the northern margin of Qilian Mts. (northern Tibetan Plateau). The results suggest that the grain sizes of the Jiuquan and Gobi Gravel Beds over the last 0.8 Ma are characterized by nine coarse-fine cycles having strong 100-ka and 41-ka periodicities that correlate well with the loess-paleosol monsoon record and isotopic global climatic record from deep sea sediments as well as by a long trend of coarsening in gravel grain size. The coarse gravel layers were formed during the warm-humid interglaciations while the fine layers correspond to the cold-dry glaciations. Because the paleoclimate in NW China began to get dramatically drier after the mid-Pleistocene, we think the persistent coarsening of gravel grain size was most probably caused by the rapid uplift of the northern Tibetan Plateau, and that the orbital scale cyclic variations in gravel grain size were driven by orbital forcing factors that were superimposed on the tectonically-forced long-term coarsening trend in gravel size. These findings also shed new light on the interaction results of climate and tectonics in relation to the uplift of the Tibetan Plateau.

关键词： Tibetan Plateau Jiuxi Basin gravels grain sizes climate changes tectonics.

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Copolymer of lactide and ε-caprolactone catalyzed by bimetallic Schiff base aluminum complexes

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Science China Chemistry 2016年第11期59卷 1384-1389页

作者： Jingwei Yang Zhiqiang Sun Ranlong Duan lili li Xuan Pang Xuesi Chen Department of Materials Science and Engineering Jilin University Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied Chemistry Chinese Academy of Sciences

A series of copolymers of lactide(LA) and e-caprolactone(ε-CL) with different monomer feed ratios were achieved using three kinds of bimetallic Schiff aluminum complexes as catalysts. The ratios of LA and ε-CL units in different copolymers and the average segments length were determined by NMR analysis. The comparative kinetic study of L-LA/ε-CL and rac-LA/ε-CL copolymerization systems showed that the polymerization rate of LA was faster than ε-CL, and L-LA showed polymerization rate slightly faster than rac-LA. It was inferred that the copolymers achieved by these complexes were gradient copolymers with gradual change in distribution of LA and e-CL units. The thermal properties of these copolymers were characterized by DSC analysis, which showed that the glass transition temperature(Tg) of these copolymers changed regularly according to the pro-portion change of two structural units.

关键词： bimetallic catalyst lactide ε-caprolactone ring opening copolymerization

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