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2022 International Conference on smart Energy and Electrical Engineering, SEEE 2022

作者： Ni, Jianfu Liang, Feng Zhang, Kun Yu, Zhuofei R&D Department in NARI Technology NARI Group Corporation State Key Laboratory of Smart Grid Protection and Control Nanjing China R&D Department in NARI Technology NARI Group Corporation State Key Laboratory of Smart Grid Protection and Controlline Nanjing China Tianjin China

With the implementation of China's "carbon neutral, carbon peak"dual carbon target action plan and the construction of a new power system, access to a high proportion of new energy and microgrid has changed the function and form of the distribution network. The current capacity of the distribution network to absorb a high proportion of new energy cannot fully meet the needs of future development. Through rational planning, the carrying capacity of a distribution network for new energy can be improved, operation efficiency can be improved, and expansion investment can be delayed. Therefore, based on the analysis of the current typical network architecture of the distribution network, combined with the development trend of the AC/DC distribution network and the development trend of a high proportion of new energy penetration, this paper puts forward the future architecture and network shape of the AC/DC distribution network, focusing on the short-term, long-term and cellular AC/DC distribution network shape characteristics. It also discusses the influence of Photovoltaic (PV) permeability level on the grid configuration selection of AC/DC distribution network. Finally, it discusses the problems worthy of attention in the future planning of AC/DC distribution networks. © Published under licence by IOP Publishing Ltd.

关键词： Electric power distribution

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Data quality evaluation and calibration of on-road remote sensing systems based on exhaust plumes

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Journal of Environmental Sciences 2023年第1期123卷 317-326页

作者： Shijie Liu Xinlu Zhang Linlin Ma Liqiang He Shaojun Zhang Miaomiao Cheng State Key Laboratory of Environmental Criteria and Risk Assessment Chinese Research Academy of Environmental SciencesBeijing 100012China Institute of Atmospheric Environment Chinese Research Academy of Environmental SciencesBeijing 100012China School of Environment State Key Joint Laboratory of Environment Simulation and Pollution ControlTsinghua UniversityBeijing 100084China State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex Beijing 100084China

In recent years,with rapid increases in the number of vehicles in China,the contribution of vehicle exhaust emissions to air pollution has become increasingly *** achieve the precise control of emissions,on-road remote sensing(RS)technology has been developed and applied for law enforcement and ***,data quality is still an existing issue affecting the development and application of *** this study,the RS data from a cross-road RS system used at a single site(from 2012 to 2015)were collected,the data screening process was reviewed,the issues with data quality were summarized,a new method of data screening and calibration was proposed,and the effectiveness of the improved data quality control methods was finally *** results showed that this method reduces the skewness and kurtosis of the data distribution by up to nearly 67%,which restores the actual characteristics of exhaust diffusion and is conducive to the identification of actual clean and high-emission *** annual variability of emission factors of nitric oxide decreases by 60%-on average-eliminating the annual drift of fleet emissions and improving data reliability.

关键词： On-road remote sensing(RS) Data quality Spearman rank correlation Least-square regression with a non-zero intercept Cook value

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Hybrid HVDC Transmission Line protection Method Based on Synchrosqueezing Wavelet Transform 1

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6th PURPLE MOUNTAIN FORUM on smart Grid protection and control, PMF2021

作者： Li, Xindong Dai, Wei Wu, Tonghua Teng, Xianliang Zheng, Kuncheng Hou, Xiaofan Wu, Dan State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China Nanjing211106 China

ISBN: (数字)9789811671562

ISBN: (纸本)9789811671555

The electromagnetic transient simulation model of hybrid HVDC transmission system is constructed based on the Baihetan—Southern Jiangsu Hybrid MTDC Transmission Project. The theoretical and simulation analysis targeting the transmission characteristics of boundary elements to line mode voltage fault components in Hybrid DC transmission system is conducted. Accordingly, a hybrid transmission line protection method based on fault voltage transient is proposed. The high and low-frequency energy ratio in line mode voltage fault components at both ends of the line is calculated to identify the internal and external faults of hybrid HVDC transmission line. Specifically, the extraction of transient component of line mode voltage and the characterization of its high-frequency energy are completed by synchrosqueezing wavelet transform. The calculation results show that, compared with the traditional continuous wavelet transform, the synchrosqueezing wavelet transform has better time–frequency concentration. According to the simulation results, such protection method can identify the internal and external faults of the line in a quickly and reliably manner, and can reliably act in case of high resistance grounding fault. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Wavelet transforms

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Design and Performance Test of an H-shaped Bionic Piezoelectric Robot Based on the Standing Wave Principle

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Journal of Bionic Engineering 2025年第2期22卷 608-625页

作者： Ying Li Chaofeng Li Zhiwei Wu Binbin Zhu Jinghu Tang School of Mechanical Engineering and Automation Northeastern UniversityShenyang110819People’s Republic of China Key Laboratory of Vibration and Control of Aero-propulsion Systems Northeastern UniversityShenyang110819People’s Republic of China State Key Laboratory of Internet of Things for Smart City University of MacaoMacao999078People’s Republic of China

In this paper,inspired by the running motion gait of a cheetah,an H-shaped bionic piezoelectric robot(H-BPR)based on the standing wave principle is proposed and *** piezoelectric robot realizes linear motion,turning motion,and turning motion with different radi by the voltage differential driving method.A prototype with a weight of 38 g and dimensions of 150×80×31 mm^(3) was ***,the dynamics and kinematics of the piezoelectric robot were analyzed to obtain the trajectory of a point at the end of the piezoelectric robot *** motion principle of the piezo-electric robot was analyzed,and then the piezoelectric robot's modal analysis and harmonic response analysis were carried out using finite element analysis ***,an experimental setup was built to verify the effectiveness and high efficiency of the robot's motion,and the effects of frequency,voltage,load,and height of the driving leg on the robot's motion performance were *** performance test results show that the piezoelectric robot has a maximum veloc-ity of 66.79 mm/s at an excitation voltage of 320 V and a load capacity of 55 *** addition,the H-BPR with unequal drive legs has better climbing performance,and the obtained conclusions are informative for selecting leg heights for piezoelectric robots.

关键词： Piezoelectric Standing wave principle Bionic Differential driving method Robot

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Rapid Generation of DFIG Farm Equivalent Model Evaluation Scenario Based on Deep Belief Network 7

Rapid Generation of DFIG Farm Equivalent Model Evaluation Sc...

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7th International Conference on Power and Energy Engineering, ICPEE 2023

作者： Jiang, Hao Xu, Lixiong Cui, Xiaodan Wu, Jialong Feng, Jiaqi Liu, Yang School of Electrical Engineering Sichuan University Chengdu China State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Jiangsu Nanjing China

ISBN: (纸本)9798350381146

The protection link within the wind farm is the key link that affects the transient characteristics of the wind farm, and also has the greatest impact on the complexity of scene construction. Therefore, it is urgent to study the method that can quickly build the chopper circuit and crowbar circuit action scene during the evaluation of the equivalent model of the wind farm. In this paper, a fast generation method of wind farm protection state scenarios based on Deep Belief Network (DBN) is proposed. Firstly, characteristic quantities that affect the protection action of a single fan in a wind farm are extracted, such as terminal voltage drop (the junction voltage of a single fan is equal to the terminal voltage), wind speed, etc. Simulation is carried out on a single fan in scenarios with different characteristic quantities, and records of characteristic quantities and protection actions are put into the DBN model for training as a sample set. Through training, a DBN model which can directly and accurately generate the fan protection state according to the characteristic quantity is obtained. Then, the topological structure and line impedance information of the wind farm are obtained, and the relationship between the voltage drop at the junction point and the voltage drop at the end of each fan in the wind farm is obtained. Combined with the voltage drop at the end of each fan in the wind farm and the deep belief network model, the fan protection action scene in the wind farm can be quickly generated for equivalent model evaluation. Finally, a numerical example is given to verify the effectiveness of the proposed method. © 2023 IEEE.

关键词： Numerical methods

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A review of the technology and applications of methods for evaluating the transport of air pollutants

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Journal of Environmental Sciences 2023年第1期123卷 341-349页

作者： Xiaoqi Wang Shuiyuan Cheng Ying Zhou Hanyu Zhang Panbo Guan Zhida Zhang Weichao Bai Wujun Dai Key Laboratory of Beijing on Regional Air Pollution Control Beijing University of TechnologyBeijing 100124China School of Ecology and Environment Beijing Technology and Business UniversityBeijing 100048China State Environmental Protection Key Laboratory of Food Chain Pollution Control Beijing Technology and Business UniversityBeijing 100048China

A variety of methods based on air quality models,including tracer methods,the bruteforce method(BFM),decoupled direct method(DDM),high-order decoupled direct method(HDDM),response surface models(RSMs)and so on forth,have been widely used to study the transport of air *** methods have good applicability for the transport of air pollutants with simple formation ***,differences in research conclusions on secondary pollutants with obvious nonlinear characteristics have been *** example,the tracer method is suitable for the study of simpli?ed scenarios,while HDDM and RSMs are more suitable for the study for nonlinear *** observation techniques,including conventional air pollutant observation,lidar observation,air sounding balloons,vehicle-mounted and ship-borne technology,aerial surveys,and remote sensing observations,have been utilized to investigate air pollutant transport characteristics with time resolution as high as 1 *** addition,based on a multi-regional input-output model combined with emission inventories,the transfer of air pollutant emissions can be evaluated and applied to study the air pollutant transport *** technologies have advantages in temporal resolution and accuracy,while modeling technologies are more?exible in spatial resolution and research plan *** order to accurately quantify the transport characteristics of pollutants,it is necessary to develop a research method for interactive veri?cation of observation and *** evaluation of the transport of air pollutants from different angles can provide a scienti?c basis for regional joint prevention and control.

关键词： Air pollutant transport Simulation technology Observation technology Transport matrix Transport?ux

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Security and Stability Checking Method of Dispatching Plan Considering Uncertainty of New Energy 1

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7th Purple Mountain Forum on smart Grid protection and control, PMF2022

作者： Haifeng, Zhou Licheng, Sha Qi, Pan Wei, Xu Yinghao, Li Xiaoqin, Xia Jiacheng, Liu Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China State Grid Beijing Electric Power Company Beijing100032 China

ISBN: (数字)9789819900633

ISBN: (纸本)9789819900626

The uncertainty of new energy power forecasting makes it difficult to implement the dispatching plan. Therefore, a security and stability checking method of the dispatching plan considering the uncertainty of new energy is proposed. The security and stability margin minimization calculation model considering the uncertainty constraints of new energy is established. A high-risk planning situation set that may lead to the abnormal implementation of the planning is generated based on the conservative principle. Based on the high-risk planning situation set, the security and stability of the assessment fault set are evaluated by quantitative analysis method. The security and stability check results and the implementation of the dispatching plan are obtained considering the uncertainty of the new energy power forecasting. The effectiveness of the proposed method is verified by an example of actual power grid. © state Grid Electric Power Research Institute 2023.

关键词： Risk assessment

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Host-Induced Gene Silencing of Effector AGLIP1 Enhanced Resistance of Rice to Rhizoctonia solani AG1-IA

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Rice science 2024年第4期31卷 463-474,I0031-I0034页

作者： ZHAO Mei LIU Xiaoxue WAN Jun ZHOU Erxun SHU Canwei Pesticide State Key Laboratory of Green Pesticide Guangdong Province Key Laboratory of Microbial Signals and Disease ControlCollege of Plant ProtectionSouth China Agricultural UniversityGuangzhou 510642China College of Life Science and Engineering Henan University of Urban ConstructionPingdingshan 467036China

Rice sheath blight, caused by Rhizoctonia solani AG1-IA, is a major disease in rice-growing areas worldwide. Effectors of phytopathogenic fungi play important roles during the infection process of fungal pathogens onto their host plants. However, the molecular mechanisms by which R. solani effectors regulate rice immunity are not well understood. Through prediction, 78 candidate effector molecules were identified. Using the tobacco rattle virus-host induced gene silencing(TRV-HIGS) system, 45 RNAi constructs of effector genes were infiltrated into Nicotiana benthamiana leaves. The results revealed that eight of these constructs resulted in a significant reduction in necrosis caused by infection with the AG1-IA strain GD-118. Additionally, stable rice transformants carrying the double-stranded RNA construct for one of the effector genes, AGLIP1, were generated to further verify the function of this gene. The suppression of the AGLIP1 gene increased the resistance of both N. benthamiana and rice against GD-118, and also affected the growth rate of GD-118, indicating that AGLIP1 is a key pathogenic factor. Small RNA sequencing showed that the HIGS vectors were processed into si RNAs within the plants and then translocated to the fungi, leading to the silencing of the target genes. As a result, AGLIP1 might be an excellent candidate for HIGS, thereby enhancing crop resistance against the pathogen and contributing to the control of R. solani infection.

关键词： Rhizoctonia solani host-induced gene silencing lipase tobacco rattle virus

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A novel chorismate mutase effector secreted from root-knot nematode Meloidogyne enterolobii manipulates plant immunity to promote parasitism

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Journal of Integrative Agriculture 2024年第12期23卷 4107-4119页

作者： Tuizi Feng Yuan Chen Zhourong Li Ji Pei Deliang Peng Huan Peng Haibo Long Key Laboratory of Integrated Pest Management on Tropical Crops Ministry of Agriculture and Rural AffairsEnvironment and Plant Protection InstituteChinese Academy of Tropical Agricultural SciencesHaikou 571101China Hainan Key Laboratory for Monitoring and Control of Tropical Agricultural Pests Environment and Plant Protection InstituteChinese Academy of Tropical Agricultural SciencesHaikou 571101China State Key Laboratory for Biology of Plant Diseases and Insect Pests Institute of Plant ProtectionChinese Academy of Agricultural SciencesBeijing 100193China

Meloidogyne *** an economically important plant-parasitic nematode distributed *** fight with host immune system for successful parasitism,plant parasitic nematodes secrete effectors to promote *** this study,we identified one chorismate mutase(CM)effector from ***,named *** and temporal expression assays exhibited Me-cm is expressed in esophageal glands and up-regulated at parasitic-stage ***-CM affects the pathogenicity of *** based on the reduced infection rate,number of galls,egg masses,eggs per mass and multiplication rate collected from RNA silencing *** showed that Me-CM localized in the cytoplasm and nucleus of plant cells and decreased the expression level of the marker gene PR1 of salicylic acid(SA)***,constitutive expression of Me-cm in Arabidopsis thaliana significantly reduced salicylic acid *** results suggested that *** may secrete effector Me-CM to fight with plantimmunesystemsvia regulating SA signaling pathway when interacting with host plants,ultimately facilitating parasitism.

关键词： Meloidogyne enterolobii effector chorismate mutase salicylic acid plant immunity

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Promotion of symbiotic interaction between phagotrophic protists and beneficial bacteria, mediated via balancing of soil nutrients, reduces the incidence of watermelon Fusarium wilt

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Pedosphere 2025年第2期35卷 352-363页

作者： Yaoyao TONG Li WANG Chuanfa WU Haoqing ZHANG Yangwu DENG Ming CHEN Xianqing ZHENG Weiguang Lü Jianping CHEN Tida GE State Key Laboratory for Quality and Safety of Agro-Products International Science and Technology Cooperation Base for the Regulation of Soil Biological Functions and One Health of Zhejiang Province Ningbo University Key Laboratory of Biotechnology in Plant Protection of MARA and Zhejiang Province Institute of Plant Virology Ningbo University Jiangxi Provincial Key Laboratory of Environmental Pollution Prevention and Control in Mining and Metallurgy Jiangxi University of Science and Technology Eco-environmental Protection Institute of Shanghai Academy of Agricultural Sciences

Elucidating the microbial mechanisms that trigger Fusarium wilt represents a key step in addressing the barriers to sustainable cropping. However,from the perspective of the complete microbiome, the integrated role of soil nutrients and microbial community in the fields with different rates of wilt disease remains unclear. In this study, we examined the potential interrelationships among the nutrients, bacteria, fungi, and protists in rhizospheric soils collected from the fields with watermelon cropping for 7 years at the Zhuanghang Experimental Station of Shanghai Academy of Agricultural Sciences,China. The soils collected were characterized by a high(HW, 81.25%) or low(LW, 6.25%) wilting rate. The HW soil was found to contain a higher abundance of Fusarium oxysporum(1.30-fold higher) than the LW soil, along with higher contents of available phosphorus(1.31-fold higher) and available potassium(2.39-fold higher). In addition, the interkingdom correlation between protists and bacteria in the HW soil was 2.08-fold higher than that in the LW ***, structural equation modeling revealed that an excess of soil available potassium enhanced the predation by potentially detrimental phagotrophic protists on potentially beneficial bacteria. In summary, our findings indicated that a balanced nutrient input and the interactions between protists(Cercomonas and Colpoda) and beneficial bacteria(Bacillus) played important roles in controlling the incidence of watermelon Fusarium wilt.

关键词： co-occurrence network continuous cropping Fusarium oxysporum microbial community nitrogen limitation soil-borne pathogen

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