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Research on corona discharge suppression of high-voltage direct-current transmission lines based on dielectric-film-covered conductor

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Plasma Science and Technology 2021年第2期23卷 64-75页

作者： yuze jiang Qiying LI Xuekai ZHANG Diwen jiang Shiqiang LIU Bangfa PENG Jie LI State Grid Shandong Electric Power Research Institute Jinan 250003People's Republic of China State Grid Shandong Electric Power Company Jinan 250001People's Republic of China State Grid Jinan Jiyang Power Supply Company Jiyang 251400People's Republic of China School of Electrical Engineering Dalian University of TechnologyDalian 116024People's Republic of China

Corona discharge suppression for high-voltage direct-current(HVDC)transmission lines at line terminals such as converter stations is a subject that requires *** this paper,a method based on a conductor covered with dielectric film is proposed and implemented through a bench-scale *** with the bare conductor,the corona discharge suppression effect of the dielectric-film-covered conductor under positive polarity is studied from the composite field strength and ion current density using a line-plate experimental *** influences of film thickness and film material on the corona discharge suppression effect are *** charge accumulation and dissipation characteristics of different film materials are also *** results show that the conductor covered with dielectric film has excellent ability to inhibit corona *** ground-level composite field strength of the conductor covered with dielectric film is lower than its nominal field strength,and its ion current density is at the nA m^(−2) *** corona threshold voltage can be promoted by increasing the film thickness,but the ability to inhibit corona discharge becomes *** larger the surface electric field strength,the more charge accumulated,but the faster the charge dissipation *** with polyvinyl chloride film,cross-linked polyethylene film has stronger charge accumulation ability and slower charge dissipation rate,which can better restrain the corona discharge of HVDC transmission lines.

关键词： high-voltage direct-current(HVDC)transmission lines corona discharge suppression dielectric-film-covered conductor composite field strength ion current density

Personalized Thermal Comfort Model with Decision Tree

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Intelligent Control and Automation 2019年第4期10卷 168-177页

作者： yuze jiang Cushing Academy Ashburnham MA USA

Thermal comfort is the expression of people’s satisfaction with the indoor temperature and is related to people’s working efficiency and health. In this way, it is necessary to construct a suitable environment for the user. However, even if adaptive thermal comfort has been developing rapidly for the past decades, most of the models are still developed based on simple statistical analysis such as regression models, which may not capture the complex relations between thermal comfort and the indoor thermal environment as well as differences between individual characteristics. Hence, in order to improve the accuracy of the adaptive thermal comfort model, this paper proposes a decision-tree-based thermal comfort model developed with the subset of the RP884 dataset. Then, a comfort-based HVAC controller was developed with the thermal sensation prediction results with the trained model above. As a result, the proposed controller indeed improves occupant’s thermal comfort model.

关键词： Thermal Comfort Decision Trees HVAC

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维普期刊数据库

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目标检测的多尺度定位提升算法

西安电子科技大学学报 2021年第3期48卷 85-90页

作者：王平江雨泽赵光辉天津航天中为数据系统科技有限公司天津300301 西安电子科技大学人工智能学院陕西西安710071

对于目标检测任务,深度神经网络模型中的一阶段网络结构存在两个问题。首先,网络结构中的锚框超参数设计的合适与否将影响整个网络的训练结果;其次,较大的降采样因子会影响目标的定位能力。针对这两个问题,提出了多尺度定位提升网络模... 详细信息

对于目标检测任务,深度神经网络模型中的一阶段网络结构存在两个问题。首先,网络结构中的锚框超参数设计的合适与否将影响整个网络的训练结果;其次,较大的降采样因子会影响目标的定位能力。针对这两个问题,提出了多尺度定位提升网络模型。重新设计了一阶段网络模型结构,并且提出了更好的锚框超参数选择方案,它在保证一阶段网络效率的同时,定位精度比之前的一阶段网络模型更好。大量实验表明,多尺度定位提升算法在保证实时性的同时实现了更高的定位精度,在公开数据集(Pascal VOC 2007)上实现了82.5%的平均准确率。

关键词：神经网络多尺度定位目标检测卷积神经网络

Comparative Study of Dielectric Barrier Discharge Reactors on Elemental Mercury Oxidation and Energy Performance

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Comparative Study of Dielectric Barrier Discharge Reactors o...

第十六届全国等离子体科学技术会议暨第一届全国等离子体医学研讨会

作者： Jiu Tao An Ke Feng Shang Na Lu yuze jiang Jie Li Yan Wu College of Electrical Engineering Dalian University of Technology Key Laboratory of Industrial Ecology and Environmental Engineering Ministry of Education of the People's Republic of China Shandong Electric Power Research Institute

Introduction Mercury has been attracted extensive attention because of its persistence,and bioaccumulation in the *** barrier discharge(DBD) plasma has been receiving great emphasis for oxidation Hg[1].DBD reactor can be divided into four types: concentric cylinder type discharge,surface discharge,coplanar discharge and packed-bed discharge[2].Different DBD reactors may have different plasma physical and electrical *** the practical use and the optimal design of DBD reactors,it is highly important to investigate the differences both the plasma reactors in the physical properties and chemical properties. Experimental

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来源： cnki会议评论

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脉冲放电脱硫产物的收集

环境科学 2000年第2期21卷 50-53页

作者：姜雨泽吴彦王宁会逯明福大连理工大学电磁系静电与特种电源研究所大连116024

实验结果表明利用给反应器加直流基压收集脱硫产物是可行的．产物收集效率随直流基压和停留时间的增加而增加，在本实验条件下，最高收集效率达到９５．１％．加直流基压后，脉冲电压、电流波形基本不变，放电增强，脱硫效果提高．加... 详细信息

实验结果表明利用给反应器加直流基压收集脱硫产物是可行的．产物收集效率随直流基压和停留时间的增加而增加，在本实验条件下，最高收集效率达到９５．１％．加直流基压后，脉冲电压、电流波形基本不变，放电增强，脱硫效果提高．加直流基压可使反应器在脱硫的同时有效收集产物．

关键词：脉冲电晕放电脱硫产物收集气溶胶烟气处理

等离子体射流对染污高温硫化硅橡胶憎水特性的影响

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高电压技术 2015年第1期41卷 262-267页

作者：张若兵苏善诚姜雨泽刘辉关志成清华大学深圳研究生院深圳518055 国网山东省电力公司电力科学研究院济南250002

为研究改善染污高温硫化硅橡胶(HTV)憎水性的方法,采用大气压下的介质阻挡放电(DBD)产生低温等离子体射流,对高岭土染污后的HTV试片表面进行处理。在不同处理时间、盐密及灰密情况下,测量了染污高温硫化硅橡胶表面的接触角,研究其随时... 详细信息

为研究改善染污高温硫化硅橡胶(HTV)憎水性的方法,采用大气压下的介质阻挡放电(DBD)产生低温等离子体射流,对高岭土染污后的HTV试片表面进行处理。在不同处理时间、盐密及灰密情况下,测量了染污高温硫化硅橡胶表面的接触角,研究其随时间的变化情况。研究发现:染污高温硫化硅橡胶表面在经过较短时间的低温等离子体射流处理之后,其憎水性得到了明显改善,接触角>100°;并且随着迁移时间的增加,其憎水迁移速度明显加快,迁移5 h后接触角即>110°。在重污秽情况下,随着处理时间的增加,其憎水性也得到相应改善,但效果并不理想,接触角普遍<35°。通过对照试验及扫描电镜(SEM)成像可以得到该现象产生的原因是射流等离子体与HTV相互作用,加速了HTV憎水迁移过程导致的。

关键词：低温等离子体射流污秽高温硫化硅橡胶憎水性接触角扫描电镜