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

High Power Density Buck Boost DC/DC Converter Using SIC MOSFET 使用 SIC MOSFET 的高功率密度降压升压型 DC/DC 转换器

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012099

Zuraiz Rana, Runquan Meng, Kashif Ali, Rashid Haseeb

引用次数: 0

Hydration characteristics and kinetic analysis of polyacrylamide (PAM) anti-dispersion cement-based materials 聚丙烯酰胺（PAM）抗分散水泥基材料的水化特性和动力学分析

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2790/1/012001

Yang He, Hua Wei, Chunhe Li, Hao Lu, Fei Xu, Jiaming Zhang

{"title":"Hydration characteristics and kinetic analysis of polyacrylamide (PAM) anti-dispersion cement-based materials","authors":"Yang He, Hua Wei, Chunhe Li, Hao Lu, Fei Xu, Jiaming Zhang","doi":"10.1088/1742-6596/2790/1/012001","DOIUrl":"https://doi.org/10.1088/1742-6596/2790/1/012001","url":null,"abstract":"\u0000 Through phase analysis and quantitative calculations of the hydration process, the inclusion of polyacrylamide (PAM) in Anti-dispersion Water Paste affects its hydration characteristics is discovered. Specifically, the presence of PAM reduces early reactivity while accelerating progress in the middle to late stages of hydration. By employing K-D hydration kinetic analysis, it is confirmed that the use of PAM results in the formation of a multi-nucleation homogeneous point system within the cement slurry. This system prolongs the NG (nucleation and growth) process time, increases the hydration degree during the transition from NG to I (induction) process, and inhibits the heterogeneous precipitation of hydration products. Consequently, the early hydration of cement is hindered. As the hydration reaction advances, the microstructure of the product under multi-nucleation points increases the specific surface area. This gradual breakthrough of the hydration threshold barrier shortens the duration of the phase boundary reaction process and reduces the hydration degree during the I and D (diffusion) processes. Consequently, the late-stage hydration rate is accelerated.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"2011 27","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141851697","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 Partial Discharge Characteristics of Suspension Defect in GIS under the Action of Voltage and Current 电压和电流作用下 GIS 悬挂缺陷的局部放电特性研究

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2774/1/012084

Zhenghong Bao, Jiyun Ren, Lili Wang, Shengjie Wang, Yao Chen, Zibin Li, Zile Wang, Yongfu Ma, Liao Li, Huan Chen

{"title":"Research on Partial Discharge Characteristics of Suspension Defect in GIS under the Action of Voltage and Current","authors":"Zhenghong Bao, Jiyun Ren, Lili Wang, Shengjie Wang, Yao Chen, Zibin Li, Zile Wang, Yongfu Ma, Liao Li, Huan Chen","doi":"10.1088/1742-6596/2774/1/012084","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012084","url":null,"abstract":"\u0000 Gas insulated switchgear (GIS) is a critical component in power system, and the insulation testing is crucial before putting it into operation. Despite passing AC withstand tests, some GIS equipment exhibit insulation faults during operation. Existing AC withstand tests fall short in detecting all insulation faults in GIS equipment. To address this issue, a proposal is made to conduct a comprehensive simulation of actual GIS equipment operating conditions through a combined voltage and current boost test, aiming to address the limitations of existing tests. This study, based on a 330kV GIS test platform, compares the partial discharge characteristics of suspension defects under traditional voltage-boosting mode and the combined voltage and current boost mode. The research investigates the influence of simultaneously applying voltage and current on discharge characteristics. It is observed that the voltage and current boost combined mode significantly increase the partial discharge inception voltage (PDIV) and the corresponding apparent discharge compared to other modes. The apparent discharge quantity after a certain period of current flow during the discharge development process is greater than that observed in other modes. The current notably enhances the ultrasonic amplitude of partial discharge. These findings establish an experimental foundation for conducting voltage and current combined boost tests in the field.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"86 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141838885","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

Adaptive VSG-Based power allocation strategy for hybrid energy storage 基于自适应 VSG 的混合储能功率分配策略

Journal of Physics: Conference Series Pub Date : 2024-07-01 DOI: 10.1088/1742-6596/2797/1/012050

Zihan Li, Liyou Fu

引用次数: 0

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

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

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