2020 4th International Conference on HVDC (HVDC)最新文献_第8页

Simulation and Disscussion of the PSS Performance in Thermal Power Clusters of the AC-DC Grid 交直流电网火电集群PSS性能的仿真与探讨

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292891

Lei Yang, Li Hao, He Xinlin, L. Chunli, D. Jiandong

引用次数: 1

Analysis of the Magnetic Field at the Driving Board of the MMC Sub-module of 500kV VSC Valve 500kV VSC阀MMC子模块驱动板磁场分析

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292785

Rong Hu, Weihua Deng, Hongyu Wang, Hong Shen, Zhao Kuai, Lei Qi

{"title":"Analysis of the Magnetic Field at the Driving Board of the MMC Sub-module of 500kV VSC Valve","authors":"Rong Hu, Weihua Deng, Hongyu Wang, Hong Shen, Zhao Kuai, Lei Qi","doi":"10.1109/HVDC50696.2020.9292785","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292785","url":null,"abstract":"Before leaving the factory, the 500kV VSC valve used in the ZhangBei project needs to be subjected to electromagnetic compatibility immunity test for the driver board of its MMC sub-module, including power frequency magnetic field immunity test. In order to determine the level of the test, it is necessary to analyze the magnetic field distribution at the sub-module driving board of the VSC valve. This paper analyzes the transfer process of the current in the sub-module when the 500kV VSC valve is in normal operation, establishes its magnetic field calculation model, and builds a double-pulse test platform. The error of the magnetic field value is less than 10%, which verifies the validity of the model. The model is used to predict the magnetic field waveform characteristics of the sub-module driving board when the 500kV VSC valve has a normal flow of 3kA. At the same time, the magnetic field contribution of the adjacent sub-modules to the central sub-module is analyzed. The results show that the adjacent sub-module is the main contribution of the magnetic field at the drive board, and the effective value of the magnetic field strength can reach up to 900A/m, It is necessary to improve the test grade of power frequency magnetic field disturbance immunity for submodule drive board.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126363771","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Open-circuit Fault Detection and Location in MMCs with Multivariate Gaussian Distribution 多变量高斯分布mmc的开路故障检测与定位

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292753

Wenshuo Xing, Heya Yang, Jing Sheng, Xiaofei Chang, Wuhua Li, Xiangning He

引用次数: 4

Lightning Trip Warning Based on GA-BP Neural Network Technology 基于GA-BP神经网络技术的闪电绊倒预警

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292890

Guangyun Su, Tang Chongwang, Deng Zhiyong, Wang Zhenyu, Wang Jia, Feng Yongkun

{"title":"Lightning Trip Warning Based on GA-BP Neural Network Technology","authors":"Guangyun Su, Tang Chongwang, Deng Zhiyong, Wang Zhenyu, Wang Jia, Feng Yongkun","doi":"10.1109/HVDC50696.2020.9292890","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292890","url":null,"abstract":"Due to the complex operation environment of transmission lines and many factors affecting lightning trip, it is difficult to realize real-time warning of lightning trip of transmission lines. This paper presents a new real-time warning method for lightning trip based on the combination of lightning location system, transmission line data and GA-BP neural network technology. Firstly, the factors affecting line tripping are determined and input data are preprocessed. Then, a lightning trip prediction model based on GA-BP neural network is established. The total number of lightning trips can be predicted by summing up the results of all the intervals of the line to be warned. Finally, according to the classification standard of early warning, the lightning trip warning of the whole line is realized. The example shows that the correct classification rate is 80%, the accuracy rate is 86.67%, the false alarm rate and the leakage alarm rate are 23.53% and 13.33% respectively. The performance index of the model is ideal, so the model has a good prediction effect for the real-time lightning trip warning of transmission lines.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"112 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123792141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

Condition Monitoring of Multi-chip Parallel Presspack IGBT Devices Based on Current Distribution 基于电流分布的多芯片并行压封装IGBT器件状态监测

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292843

Zhenyu Deng, Minyou Chen, Yunhai Wei, Wei Lai, Hui Li, Xiao Wang, Xueni Ding

引用次数: 2

Effects of Control on the DC Impedance of Modular Multilevel Converters 控制对模块化多电平变换器直流阻抗的影响

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292701

Pengkun Li, Yue Wang, Xuan Li, Zhuling Li, T. Yin, Runtian Li

引用次数: 0

Enhancement of Dielectric Properties of Photosensitive Composites Based on Perfluorosilane-modified BaTiO3Nanoparticles 全氟硅烷修饰batio3纳米颗粒增强光敏复合材料介电性能

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292765

Yongjie Nie, B. Luo, M. Fu, Xianping Zhao, Yifan Zhang

{"title":"Enhancement of Dielectric Properties of Photosensitive Composites Based on Perfluorosilane-modified BaTiO3Nanoparticles","authors":"Yongjie Nie, B. Luo, M. Fu, Xianping Zhao, Yifan Zhang","doi":"10.1109/HVDC50696.2020.9292765","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292765","url":null,"abstract":"Dielectric functionally gradient materials (d-FGM) provide a new strategy for the uniform distribution of electric field in insulators. The fabrication and application of d-FGM are based on the adjustable dielectric constant of composites, while the composite materials have excellent electrical insulation performance. The interfacial interactions between nanoparticles and matrix play a key role in the above issue. Herein, perfluorosilane (FAS-17) was adopted to modify the surface of nano-BaTiO3particles, and BaTiO3/UV-cured resin composites were prepared. The modified particles were characterized by FT-IR, XPS, TGA and water contact angle. The effects of surface-treated BaTiO3particles on the dielectric constant, dielectric loss and volume resistivity of photosensitive composites were systematically studied. The results show that the molecule of silane coupling agent (FAS-17) is chemically grafted on the surface of BaTiO3. Compared with the unmodified composite, the improvement of interface adhesion may be responsible for the effective enhancement of electrical insulation properties of the modified composites, which makes this material a promising potential to be d-FGM based on stereolithography (SLA).","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"266 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123366544","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Research on XLPE Insulation Failure Characteristics of DC Cables in Fire Environmet 火灾环境下直流电缆交联聚乙烯绝缘失效特性研究

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292857

Jiankang Zheng, Qiming Gong, Hai Nan, Xiaoting Su, Cheng Duan, Mingyang Xu

引用次数: 0

Study on the Formation of Capacitor Screen Deformation of Dry-type DC Bushing Core and Its Effect on Electric Field Distribution 干式直流套管芯电容屏变形的形成及其对电场分布的影响研究

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292861

Ming Chen, Xuandong Liu, Yuhang Shao, Qiaogen Zhang, Z. Cheng, Yi Zhao

{"title":"Study on the Formation of Capacitor Screen Deformation of Dry-type DC Bushing Core and Its Effect on Electric Field Distribution","authors":"Ming Chen, Xuandong Liu, Yuhang Shao, Qiaogen Zhang, Z. Cheng, Yi Zhao","doi":"10.1109/HVDC50696.2020.9292861","DOIUrl":"https://doi.org/10.1109/HVDC50696.2020.9292861","url":null,"abstract":"As one of the bottlenecks of HVDC technology, the high failure rate of dry-type DC bushing seriously restricts the safe and stable operation of HVDC system. During the actual operation, discharges between capacitor screens occur from time to time, in addition to the screen edges, a certain number of breakdown occur in the middle of screens. For this reason, according to the radial section of a real bushing core, the deformation in the middle screens was analyzed, the curing shrinkage deformation model of the dry-type bushing core was established, and the causes were analyzed. Subsequently, to determine the effect of deformation in the middle of the capacitor screen on the distribution of electric field between capacitor screens, a simulation model of electric field with deformation in the middle of screens was established, and the effect of different deformation on the electric field was studied. The results show that the poor local impregnation results in the deformation in the middle of screens toward the center of alumina tube. In addition, the increase of the deformation area's height, and the decrease of thickness of the capacitor screen and the deformation area's width will enhance the electric field distortion.","PeriodicalId":298807,"journal":{"name":"2020 4th International Conference on HVDC (HVDC)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134161404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Research and Application of Dispatcher Training Simulation System supporting transient steady state Calculation of AC and DC 支持交直流暂态稳态计算的调度员培训仿真系统的研究与应用

2020 4th International Conference on HVDC (HVDC) Pub Date : 2020-11-06 DOI: 10.1109/HVDC50696.2020.9292672

Yong Wang, F. Dong, Li Shen

引用次数: 0