Journal of Physics: Conference Series最新文献_第9页

Research on Coordinated Control and Hierarchical Partition Control Strategy of Distributed Generation in New Power System 新电力系统中分布式发电的协调控制与分层分区控制策略研究

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012050

Zhihao An, Shaoshuai Lv, Ning Yin, Zongli Wang

引用次数: 0

A Current-Mode bandgap reference with robust start-up behaviour 具有稳健启动特性的电流模式带隙基准

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2797/1/012004

Bingjie Chen, Xue Liu, Xin’an Wang

引用次数: 0

Research on discharge characteristics of synthetic ester-paper insulation under power frequency and low frequency 合成酯纸绝缘材料在工频和低频下的放电特性研究

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2797/1/012007

Jiansheng Li, Peng Wu, Shengquan Wang, Jiabi Liang

引用次数: 0

Trajectory optimization for the diving segment of air-breathing supersonic vehicle with multi-objective 用多目标优化喷气式超音速飞行器俯冲段的轨迹

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2797/1/012052

Suyu Yan, Chao Ming, Zhihua Wei, Kaiyuan Yang

引用次数: 0

Application of Data Security Protection in Smart Grid Based on Computer Electronic Technology 基于计算机电子技术的智能电网数据安全保护应用

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012024

Xiangguo Liu, Huijun Du, Zhonglong Wang, Jianfei Chen, Jia Peng, Yue Liu

{"title":"Application of Data Security Protection in Smart Grid Based on Computer Electronic Technology","authors":"Xiangguo Liu, Huijun Du, Zhonglong Wang, Jianfei Chen, Jia Peng, Yue Liu","doi":"10.1088/1742-6596/2774/1/012024","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012024","url":null,"abstract":"\u0000 With the continuous improvement of the intelligence level of the State Grid, data security protection in power system automation has become an important challenge for the development of power enterprises. In order to solve this problem, this article is based on the research of power system structure, data types, and the current development status of security protection, combined with computer electronics technology, to conduct in-depth research on data security protection in power system automation, and establish a security protection model based on its theoretical foundation. In order to verify the effectiveness of the model, this paper tested it from three dimensions: data security protection degree, risk processing efficiency, and response time, and compared it with traditional security protection models. The test results show that under different test cases, the maximum protection degree of the data security protection model proposed in this article reaches 95.16%, and the average protection degree is about 91.88%. From the specific test results, it can be seen that the application of data security protection in power system automation based on computer electronic technology has strong operability.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"115 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141842288","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 the performance and thermal comfort of CO2 heat pump heating system in high altitude area 高海拔地区二氧化碳热泵供暖系统的性能和热舒适性研究

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2795/1/012020

Xinyu Wang, Chengyan Xiong, Huilong Luo, Yuping Xia, Peijian Du, Xiaochuan Yang

{"title":"Research on the performance and thermal comfort of CO2 heat pump heating system in high altitude area","authors":"Xinyu Wang, Chengyan Xiong, Huilong Luo, Yuping Xia, Peijian Du, Xiaochuan Yang","doi":"10.1088/1742-6596/2795/1/012020","DOIUrl":"https://doi.org/10.1088/1742-6596/2795/1/012020","url":null,"abstract":"\u0000 In view of the complex climate in high altitude areas, a high altitude CO\u0000 2 air source heat pump heating system was constructed in this study, and the energy consumption of the system in one heating season (198 days) was statistically analysed, which showed that the annual average COP of the system was 2.95. Compared with conventional heat pumps, gas boilers, and electric boilers, CO\u0000 2 heat pumps reduce annual carbon emissions in high altitude areas by 9.6t, 31.1t, and 30.4t, and the payback period is 5.7 years, 3.2 years, and 2.5 years, respectively. and 30.4t of carbon emissions, with payback payback cycles of 5.7, 3.2 and 2.5 years, respectively. At the end of the heating period, the study also conducted a thermal comfort questionnaire survey for the heat users, and the results showed that the CO\u0000 2 heat pump heating system at high altitude was able to fully satisfy the indoor thermal comfort requirements while maintaining the superior performance. This study shows that CO\u0000 2 heat pumps have significant advantages in high-altitude heating applications and provides a reference for subsequent studies.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"79 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141842860","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

Ambient Signals based Load Modeling with Two Three-phase Induction Motors 基于环境信号的两台三相感应电机负载建模

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012076

Shenghua Han, Xinran Zhang, Wanjun Huang, Zihan Ling, Xiaobo Ling, Zheng Ye

{"title":"Ambient Signals based Load Modeling with Two Three-phase Induction Motors","authors":"Shenghua Han, Xinran Zhang, Wanjun Huang, Zihan Ling, Xiaobo Ling, Zheng Ye","doi":"10.1088/1742-6596/2774/1/012076","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012076","url":null,"abstract":"\u0000 The traditional electric power system simulation and calculation are based on the simple load model including one motor and one static load. On the one hand, the power system load is getting more and more complex. On the other hand, it’s proved that two kinds of three-phase induction motors will show a little difference. As a result, in this paper, a new model load with two three-phase induction motors is proposed. Besides, the dynamic of the power system load is taken into account. The torque of those two three-phase motors will show different characteristics, that one is constant and the other is variable. Formerly, the dynamic of the load is regarded as the result of an induction motor. However, the single-phase motor and electronic load both lead to the complexity of the load. To get a more accurate calculation, we need a more proper load model. One of the ways to improve the load model is to pay more attention to the ingredients ignored. The single-phase motor and power electronic load make a great difference. Besides, it’s proved that the composited load model with two three-phase motors will be better in the calculation.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"120 20","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141843705","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

Analysis of AC Filter Tripping Accident based on UHV Converter Station 基于特高压换流站的交流滤波器跳闸事故分析

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012058

Ye Ai, Ruixuan Bi, Mengchao Ma, Pei Li, Lina Chen, Haifeng Li

{"title":"Analysis of AC Filter Tripping Accident based on UHV Converter Station","authors":"Ye Ai, Ruixuan Bi, Mengchao Ma, Pei Li, Lina Chen, Haifeng Li","doi":"10.1088/1742-6596/2774/1/012058","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012058","url":null,"abstract":"\u0000 An AC filter tripping accident occurred in a converter station of the North China Power Grid in 2019, which seriously affected the safe and stable operation of the power grid. In this paper, combined with the configuration of the AC filter in the converter station and the principle of capacitor unbalance protection, the tripping mechanism of the AC filter is explained. It is considered that the direct cause of the tripping of the AC filter is the short-circuit discharge phenomenon between the layers caused by the dead trees (grass) branches on the capacitor tower, which causes the instantaneous fault between the layers of the low-voltage capacitor, and finally leads to the action of the capacitor unbalance protection. From the perspective of operation and maintenance, some practical preventive measures are put forward, which will help to improve the safety of AC filter operation in the future, and then improve the reliability of DC transmission system, especially during the peak summer, peak winter and special power protection period, to ensure that there will be no fluctuation in DC load transmission and protect the safe and stable operation of power grid.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"83 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844008","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

Mechanisms of middle-frequency oscillations in an offshore wind farm induced by the converter current inner loops 变流器电流内环诱发海上风电场中频振荡的机理

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2806/1/012012

Yong Chen, Hui Huang, Ruixiong Yang, Xingwang Ren, Yawei Sang, Haobin Wu

{"title":"Mechanisms of middle-frequency oscillations in an offshore wind farm induced by the converter current inner loops","authors":"Yong Chen, Hui Huang, Ruixiong Yang, Xingwang Ren, Yawei Sang, Haobin Wu","doi":"10.1088/1742-6596/2806/1/012012","DOIUrl":"https://doi.org/10.1088/1742-6596/2806/1/012012","url":null,"abstract":"\u0000 Middle-frequency oscillation instability is one of the important issues that threats the safe integration of offshore wind farms. However, analytical explanations to key affecting factors and laws for the middle-frequency oscillation are not clear yet, which makes it difficult to avoid this kind of oscillation effectively. Therefore, in this paper, mechanism for the middle-frequency oscillation induced by the dynamics of converter current inner loops is studied in-depth. First, small-signal transfer function model for a general offshore wind farm integrated via AC submarine cable is established. Then impact of the AC submarine cable and control parameters of the converter current inner loops on oscillation stability of the wind farm is analysed via eigenvalue analysis. It is found that with the length of AC submarine cable increases, frequency for the open-loop pole of the AC grid decreases. When open-loop pole of the AC grid gets close that of the PMSGs on complex plane, the near strong mode resonance can cause middle-frequency oscillation of the system. Finally, effectiveness of the conclusions drawn is evaluated through nonlinear simulations.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"8 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141844541","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

Nanosecond laser-assisted fabrication of Ti6Al4V surfaces with gradient wettability and robust cross-linked microstructures 用纳秒激光辅助制造具有梯度润湿性和坚固交联微结构的 Ti6Al4V 表面

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2790/1/012013

Jianli Chen, Yaohua Fan, Libo Wan, Weifeng Wu

{"title":"Nanosecond laser-assisted fabrication of Ti6Al4V surfaces with gradient wettability and robust cross-linked microstructures","authors":"Jianli Chen, Yaohua Fan, Libo Wan, Weifeng Wu","doi":"10.1088/1742-6596/2790/1/012013","DOIUrl":"https://doi.org/10.1088/1742-6596/2790/1/012013","url":null,"abstract":"\u0000 Surfaces with gradient wettability outperform singular superhydrophobic surfaces in terms of self-cleaning efficiency, anti-contamination properties, and fluid manipulation. These attributes offer extensive application potential across various industrial and scientific domains. This study introduces and employs nanosecond pulsed laser ablation to create wettability gradient surfaces on Ti6Al4V alloys, featuring robust cross-linked frame microstructures. Experimental results demonstrate that by varying the ridge width (w), associated with the liquid-solid contact fraction, we can achieve varying wettability and mechanical durability in these cross-linked frame microstructures. Wettability tests indicate static contact angles ranging from 150.7° to 105.45°. Furthermore, the sandpaper linear abrasion test illustrates a decrease in material wear rate with an increase in w. Under similar test conditions, the proposed surfaces demonstrate superior mechanical durability compared to two other prevalent wettability surface structures. The proposed surfaces, efficiently and eco-friendly produced through nanosecond laser fabrication, hold tremendous potential for diverse applications.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"20 30","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141846014","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