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| 1 | Grid Forming Converters in Renewable Energy Sources Dominated Power Grid:Control Strategy,Stability,Application,and Challenges显示文摘The renewable energy sources(RESs)dominated power grid is an envisaged infrastructure of the future power system,where the commonly used grid following(GFL)control for grid-tied converters suffers from lacking grid support capability,low stability,etc.Recently,emerging grid forming(GFM)control methods have been proposed to improve the dynamic performance and stability of grid-tied converters.This paper reviews existing GFM control methods for the grid-tied converters and compares them in terms of control structure,grid support capability,fault current limiting,and stability.Considering the impact of fault current limiting strategies,a comprehensive transient stability analysis is provided.In addition,this paper explores the typical applications of GFM converters,such as AC microgrid and offshore wind farm high-voltage direct current(OWF-HVDC)integration systems.Finally,the challenges to the GFM converters in future applications are discussed. | Haobo Zhang Wang Xiang Weixing Lin Jinyu Wen | 2021 | Journal of Modern Power Systems and Clean Energy2021，9，6： | 15 |
| 2 | Olivine-norite rock detected by the lunar rover Yutu-2 likely crystallized from the SPA-impact melt pool显示文摘Chang’E-4 landed in the South Pole-Aitken(SPA)basin,providing a unique chance to probe the composition of the lunar interior.Its landing site is located on ejecta strips in Von Karm´an crater that´possibly originate from the neighboring Finsen crater.A surface rock and the lunar regolith at 10 sites along the rover Yutu-2 track were measured by the onboard Visible and Near-Infrared Imaging Spectrometer in the first three lunar days of mission operations.In situ spectra of the regolith have peak band positions at 1 and 2μm,similar to the spectral data of Finsen ejecta from the Moon Mineralogy Mapper,which confirms that the regolith’s composition of the landing area is mostly similar to that of Finsen ejecta.The rock spectrum shows similar band peak positions,but stronger absorptions,suggesting relatively fresh exposure.The rock may consist of 38.1±5.4%low-Ca pyroxene,13.9±5.1%olivine and 48.0±3.1%plagioclase,referred to as olivine-norite.The plagioclase-abundant and olivine-poor modal composition of the rock is inconsistent with the origin of the mantle,but representative of the lunar lower crust.Alternatively,the rock crystallized from the impact-derived melt pool formed by the SPA-impact event via mixing the lunar crust and mantle materials.This scenario is consistent with fast-cooling thermal conditions of a shallow melt pool,indicated by the fine to medium-sized texture(<3 mm)of the rock and the SPA-impact melting model[Icarus 2012;220:730–43]. | Honglei Lin Zhiping He Wei Yang Yangting Lin Rui Xu Chi Zhang Meng-Hua Zhu Rui Chang Jinhai Zhang Chunlai Li Hongyu Lin Yang Liu Sheng Gou Yong Wei Sen Hu Changbin Xue Jianfeng Yang Jie Zhong Xiaohui Fu Weixing Wan Yongliao Zou | 2020 | National Science Review2020，7，5： | 9 |
| 3 | Joint calibration algorithm for gain-phase and mutual coupling errors in uniform linear array显示文摘The effect of gain-phase perturbations and mutual coupling significantly degrades the performance of digital array radar(DAR). This paper investigates array calibration problems in the scenario where the true locations of auxiliary sources deviate from nominal values but the angle intervals are known. A practical algorithm is proposed to jointly calibrate gain-phase errors and mutual coupling errors. Firstly, a simplified model of the distortion matrix is developed based on its special structure in uniform linear array(ULA). Then the model is employed to derive the precise locations of the auxiliary sources by one-dimension search. Finally, the least-squares estimation of the distortion matrix is obtained. The algorithm has the potential of achieving considerable improvement in calibration accuracy due to the reduction of unknown parameters. In addition,the algorithm is feasible for practical applications, since it requires only one auxiliary source with the help of rotation platforms. Simulation results demonstrate the validity, robustness and high performance of the proposed algorithm. Experiments were carried out using an S-band DAR test-bed.The results of measured data show that the proposed algorithm is practical and effective in application. | Li Weixing Lin Jianzhi Zhang Yue Chen Zengping | 2016 | Chinese Journal of Aeronautics2016，29，4： | 9 |
| 4 | Preliminary experimental results by the prototype of Sanya Incoherent Scatter Radar显示文摘In the past decades,the Incoherent Scatter Radar(ISR)has been demonstrated to be one of the most powerful instruments for ionosphere monitoring.The Institute of Geology and Geophysics at the Chinese Academy of Sciences was founded to build a state-ofthe-art phased-array ISR at Sanya(18.3°N,109.6°E),a low-latitude station on Hainan Island,named the Sanya ISR(SYISR).As a first step,a prototype radar system consisting of eight subarrays(SYISR-8)was built to reduce the technical risk of producing the entire large array.In this work,we have summarized the preliminary experimental results based on the SYISR-8.The amplitude and phase among 256 channels were first calibrated through an embedded internal monitoring network.The mean oscillation of the amplitude and phase after calibration were about 1 dB and 5°,respectively,which met the basic requirements.The beam directivity was confirmed by crossing screen of the International Space Station.The SYISR-8 was further used to detect the tropospheric wind profile and meteors.The derived winds were evaluated by comparison with independent radiosonde and balloon-based GPS measurements.The SYISR-8 was able to observe several typical meteor echoes,such as the meteor head echo,range-spread trail echo,and specular trail echo.These results confirmed the validity and reliability of the SYISR-8 system,thereby reducing the technical risk of producing the entire large array of the SYISR to some extent. | XinAn Yue WeiXing Wan Han Xiao LingQi Zeng ChangHai Ke BaiQi Ning Feng Ding BiQiang Zhao Lin Jin Chen Li MingYuan Li JunYi Wang HongLian Hao Ning Zhang | 2020 | Earth and Planetary Physics2020，4，6： | 3 |
| 5 | The design and fault ride through control of un-interrupted DC-DC Autotransformer显示文摘This paper proposed a novel type of DC-DC converter, termed as un-interrupted DC Autotransformer(un-interrupted DC AUTO), which has the capability to ride through DC fault on either side of the converter without blocking any devices. Besides that, the adequately designed converter retains the advantages of DC AUTO technology, namely reduced investment cost and transmission loss. To begin with, the topology and basic attributes of the un-interrupted DC AUTO are illustrated. Then the design goals and the corresponding design procedures are analyzed. Furthermore, an effective control system is proposed to enable the converter steady operation during both normal and faulted conditions. Finally, a 1000 MW ±320 kV/±640 kV test system is built on PSCAD/EMTDC platform to verify the technical feasibility of the proposed converter and the effectiveness of the control strategy. | LI MengBo XIANG Wang ZUO WenPing YAO LiangZhong LIN WeiXing WEN JinYu | 2018 | Science China(Technological Sciences)2018，61，12： | 2 |
| 6 | An investigation on the active-power variations of wind farms 显示文摘 | LIN Weixing WEN Jinyu CHENG Shijie | 2012 | IEEE Transac- tions on Industry Applications2012，48，3： | 1 |
| 7 | Multiport DC-DC autotransformer for interconnecting multiple high voltage DC sys- tems at low cost 显示文摘 | LIN Weixing WEN Jinyu CHENG Shijie | 2015 | IEEE Transactions on Power Electronics2015，30，12： | 1 |
| 8 | Influence of supply and return water temperatures on the energy consumption of a district cooling system显示文摘 | Fu Lin Jiang Yi Yuan Weixing Qin Xuzhong | 2001 | Applied Thermal Engineering2001，21，： | 1 |
| 9 | Multiport DC-DC autotransformer for interconnecting multiple high-voltage DC systems at low cost显示文摘 | Lin Weixing Wen Jinyu Cheng Shijie | 2015 | IEEE Transactions on Power Electronics2015，30，12： | 1 |
| 10 | An investigation on the active-power variations of wind farms 显示文摘 | Lin Weixing Wen Jinyu Cheng Shijie | 2012 | IEEETransactionsonlndustryApplications2012，48，3： | 1 |
| 11 | Multiport DC-DC autotransformer for interconnecting multiple high-voltage DC systems at low cost显示文摘 | Lin Weixing Wen Jinyu Cheng Shijie | 2015 | IEEE Transactions on Power Electronics2015，30，12： | 1 |
| 12 | Field Efficacy Test of 22% Fipronil FS against Sugarcane Stem Borers and Thrips显示文摘[Objective] The paper was to explore the field efficacy of 22% fipronil FS against sugarcane stem borer and thrips( Baliothrips serratus Kobus).[Method]The field trial was conducted by foliar spraying of 22% fipronil FS and mixed broadcasting with fertilizer in 2014. [Result]Foliar spraying of 22%fipronil FS at the dose of 50 m L /667 m^2 had the best control effect against sugarcane stem borer,and the control effect at 90 d post administration was 70. 70%,significantly higher than that of control agent(61. 86%). Medium and high dose of 22% fipronil FS had better control effects against sugarcane thrips. [Conclusion] Considering control effects against sugarcane stem borers and thrips as well as sugarcane yield,it is recommended that 22% fipronil FS is sprayed at medium concentration(50 mL /667 m^2). | Wang Zeping Liu Lu Jiang Hongtao Zhang Gemin Huang Weihua Liang Qiang Duan Weixing Li Yijie Wei Jinju Qin Zhenqiang Huang Chenghua Lin Shanhai | 2016 | Plant Diseases and Pests2016，7，4： | 1 |
| 13 | Influence of supply and return water temperatures on the energy consumption of a district cooling system显示文摘 | Fu Lin Jiang Yi Yuan Weixing | 2001 | Applied Thermal Engineering2001，21，1： | 1 |
| 14 | An investigation on the active-power variations of wind farms显示文摘 | Lin Weixing Wen Jinyu Hu Jianglu | 2012 | IEEE Transactions on Industry Applications2012，48，3： | 1 |
| 15 | Multiport High-Power LCL DC Hub for Use in DC Tranission Grids显示文摘 | Dragan Jovcic Weixing Lin | 2014 | IEEE Transactions on Power Delivery2014，29，2： | 1 |
| 16 | Changes in belowground carbon in Acacia crassicarpa and Eucalyptus urophylla plantations after tree girdling显示文摘 | Dima Chen Yang Zhang Yongbiao Lin Weixing Zhu Shenglei Fu | 2010 | Plant and Soil (-)2010，，1： | 1 |
| 17 | A novel PSS-online re-tuning method显示文摘 | Gang Chen Yuanzhang Sun Lin Cheng Jin Lin Weixing Zhao Cheng Lin | 2012 | Electric Power Systems Research2012，，： | 1 |
| 18 | An Investigation Report on Production Conditions of Sugarcane in Guangxi in 2016显示文摘To predict and assess production conditions of sugarcane in Guangxi in 2016,by using methods of field survey and data collection,the seedling situation,breed structure,planting area,planting period,plant diseases and insect pests of sugarcane in six major sugarcane producing cities of Guangxi were surveyed. The results show that the overall situation of sugarcane seedlings in Guangxi in 2016 became slightly worse than that in 2015,but there were enough good sugarcane seedlings in 2016. The dead heart rate of sugarcane decreased in most sugarcane regions from 2015 to 2016,that is,the comprehensive control of borers gave initial results; the smut infection rate of sugarcane rose from 2015 to 2016 and tended to increase. The situation of decrease in the planting area of sugarcane in three consecutive years was controlled,and the planting area of sugarcane increased slightly from 2015 to 2016. Due to the construction of ' double high' bases,the breed variety of sugarcane in Guangxi was improved further in 2016. It is necessary to strengthen field management and conduct chemical weeding,prevention and control of borers and aphids in the later period in time. | Yuchi DENG Weizan WANG RonghuaZHANG Shiyun TANG Shanhai LIN Qiang LIANG Weixing DUAN Xiang LI Guoying LU Shijian HAN Youzong HUANG Yebin YANG Yanni HUANG Lunwang WANG | 2017 | Asian Agricultural Research2017，9，6： | 0 |
| 19 | Trend of Standardized Design and Modular Construction for Secondary System of Smart Substations显示文摘Smart substation projects have been developed for nearly five years; it is necessary to unscramble the technology route in the whole process in order to provide a direction for the development of engineering construction. Based on the actual status quo of design and construction of the secondary system, the authors analyze the existing problems and the situation, and discuss the trend of standardized design and modular construction of smart substations. | Chen Zhirong Lin Chuanwei Yang Weixing | 2014 | Electricity2014，25，5： | 0 |
| 20 | The grassland carbon cycle:Mechanisms,responses to global changes,and potential contribution to carbon neutrality显示文摘Grassland is one of the largest terrestrial biomes,providing critical ecosystem services such as food production,biodiversity conservation,and climate change mitigation.Global climate change and land-use intensification have been causing grassland degradation and desertification worldwide.As one of the primary medium for ecosystem energy flow and biogeochemical cycling,grassland carbon(C)cycling is the most fundamental process for maintaining ecosystem services.In this review,we first summarize recent advances in our understanding of the mechanisms underpinning spatial and temporal patterns of the grassland C cycle,discuss the importance of grasslands in regulating inter-and intra-annual variations in global C fluxes,and explore the previously unappreciated complexity in abiotic processes controlling the grassland C balance,including soil inorganic C accumulation,photochemical and thermal degradation,and wind erosion.We also discuss how climate and land-use changes could alter the grassland C balance by modifying the water budget,nutrient cycling and additional plant and soil processes.Further,we examine why and how increasing aridity and improper land use may induce significant losses in grassland C stocks.Finally,we identify several priorities for future grassland C research,including improving understanding of abiotic processes in the grassland C cycle,strengthening monitoring of grassland C dynamics by integrating ground inventory,flux monitoring,and modern remote sensing techniques,and selecting appropriate plant species combinations with suitable traits and strong resistance to climate fluctuations,which would help design sustainable grassland restoration strategies in a changing climate. | Lingli Liu Emma J.Sayer Meifeng Deng Ping Li Weixing Liu Xin Wang Sen Yang Junsheng Huang Jie Luo Yanjun Su JoséM.Grünzweig Lin Jiang Shuijin Hu Shilong Piao | 2023 | Fundamental Research2023，3，2： | 0 |
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