Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2774/1/012050
Zhihao An, Shaoshuai Lv, Ning Yin, Zongli Wang
In recent years, the structure of urban power systems has become more complex and the power flow is more changeable, which seriously hinders the optimal scheduling of urban power systems. Therefore, it is necessary to realize the coordinated control of distributed generation, flexible load, and reactive power equipment globally and locally, improve the utilization rate of distributed generation, give full play to the source and load of electric vehicles and energy storage devices, and realize the optimal scheduling of urban power system. This paper proposes a multi-time scale distributed power coordinated control and hierarchical partition control model, which realizes the coordinated optimal control of the new power system for distributed power, load, and energy storage. The effectiveness of the model in this paper is verified by IEEE33 node simulation.
{"title":"Research on Coordinated Control and Hierarchical Partition Control Strategy of Distributed Generation in New Power System","authors":"Zhihao An, Shaoshuai Lv, Ning Yin, Zongli Wang","doi":"10.1088/1742-6596/2774/1/012050","DOIUrl":"https://doi.org/10.1088/1742-6596/2774/1/012050","url":null,"abstract":"\u0000 In recent years, the structure of urban power systems has become more complex and the power flow is more changeable, which seriously hinders the optimal scheduling of urban power systems. Therefore, it is necessary to realize the coordinated control of distributed generation, flexible load, and reactive power equipment globally and locally, improve the utilization rate of distributed generation, give full play to the source and load of electric vehicles and energy storage devices, and realize the optimal scheduling of urban power system. This paper proposes a multi-time scale distributed power coordinated control and hierarchical partition control model, which realizes the coordinated optimal control of the new power system for distributed power, load, and energy storage. The effectiveness of the model in this paper is verified by IEEE33 node simulation.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"31 6","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141840968","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}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2797/1/012004
Bingjie Chen, Xue Liu, Xin’an Wang
Bandgap reference with robust start-up behavior has an important role in analog circuits. In this paper, conventional current-mode bandgap reference (CMBGR) structures are investigated, along with the problem of conventional structures having multiple operating points during start-up. A CMBGR structure that can eliminate all the operating points by a simple start-up circuit is proposed. The CMBGR proposed in this paper utilizes the 180 nm technology and achieves a nominal temperature coefficient of 16.05 ppm/°C. The circuit consumes a current of 6 μA and occupies an effective area of 0.046 mm2.
{"title":"A Current-Mode bandgap reference with robust start-up behaviour","authors":"Bingjie Chen, Xue Liu, Xin’an Wang","doi":"10.1088/1742-6596/2797/1/012004","DOIUrl":"https://doi.org/10.1088/1742-6596/2797/1/012004","url":null,"abstract":"\u0000 Bandgap reference with robust start-up behavior has an important role in analog circuits. In this paper, conventional current-mode bandgap reference (CMBGR) structures are investigated, along with the problem of conventional structures having multiple operating points during start-up. A CMBGR structure that can eliminate all the operating points by a simple start-up circuit is proposed. The CMBGR proposed in this paper utilizes the 180 nm technology and achieves a nominal temperature coefficient of 16.05 ppm/°C. The circuit consumes a current of 6 μA and occupies an effective area of 0.046 mm2.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841048","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}
Synthetic ester insulating oil transformer has broad application prospects in offshore wind power low-frequency power transmission. This paper carried out discharge tests on synthetic ester-paper insulated used sharp plate electrodes at a power frequency of 50 Hz and a low frequency of 17 Hz based on the pulse current method. The research results show that some basic characteristics do not change under 50 Hz and 17 Hz, that is, the discharge is distributed near the voltage peak in a peak shape. The main differences are that the positive peak characteristics at 17 Hz tend to be blurred; the positive maximum discharge amount, and discharge times show an overall downward trend; the phase-resolved partial discharge pattern (PRPD) and the statistical map (n-φ, n-q) have the same overall shape, but different distribution ranges. The test results can be used as a reference for partial discharge pattern identification and insulation design in synthetic ester low-frequency transformers.
{"title":"Research on discharge characteristics of synthetic ester-paper insulation under power frequency and low frequency","authors":"Jiansheng Li, Peng Wu, Shengquan Wang, Jiabi Liang","doi":"10.1088/1742-6596/2797/1/012007","DOIUrl":"https://doi.org/10.1088/1742-6596/2797/1/012007","url":null,"abstract":"\u0000 Synthetic ester insulating oil transformer has broad application prospects in offshore wind power low-frequency power transmission. This paper carried out discharge tests on synthetic ester-paper insulated used sharp plate electrodes at a power frequency of 50 Hz and a low frequency of 17 Hz based on the pulse current method. The research results show that some basic characteristics do not change under 50 Hz and 17 Hz, that is, the discharge is distributed near the voltage peak in a peak shape. The main differences are that the positive peak characteristics at 17 Hz tend to be blurred; the positive maximum discharge amount, and discharge times show an overall downward trend; the phase-resolved partial discharge pattern (PRPD) and the statistical map (n-φ, n-q) have the same overall shape, but different distribution ranges. The test results can be used as a reference for partial discharge pattern identification and insulation design in synthetic ester low-frequency transformers.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"68 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841558","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}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2797/1/012052
Suyu Yan, Chao Ming, Zhihua Wei, Kaiyuan Yang
Aiming at the trajectory optimization problem of the dive section of the supersonic vehicle under the comprehensive action of different objective functions, a trajectory optimization design method for multi-optimization objectives of air-breathing supersonic vehicles is proposed. The hp adaptive pseudo-spectrum method is used to optimize the dive trajectory of an air-breathing supersonic vehicle with the maximum flight range and maximum landing velocity under the conditions of process constraints such as overload and dynamic pressure by the weighted summation method. It is proved that this method can solve the comprehensive optimization problem of multiple optimization objectives effectively and provides a new thought for the optimization of related fields.
针对不同目标函数综合作用下的超音速飞行器俯冲段轨迹优化问题，提出了喷气式超音速飞行器多优化目标的轨迹优化设计方法。在超载和动压等过程约束条件下，利用加权求和法，采用 hp 自适应伪谱法优化了具有最大飞行距离和最大着陆速度的喷气式超音速飞行器俯冲轨迹。实践证明，该方法能有效解决多优化目标的综合优化问题，为相关领域的优化提供了新思路。
{"title":"Trajectory optimization for the diving segment of air-breathing supersonic vehicle with multi-objective","authors":"Suyu Yan, Chao Ming, Zhihua Wei, Kaiyuan Yang","doi":"10.1088/1742-6596/2797/1/012052","DOIUrl":"https://doi.org/10.1088/1742-6596/2797/1/012052","url":null,"abstract":"\u0000 Aiming at the trajectory optimization problem of the dive section of the supersonic vehicle under the comprehensive action of different objective functions, a trajectory optimization design method for multi-optimization objectives of air-breathing supersonic vehicles is proposed. The hp adaptive pseudo-spectrum method is used to optimize the dive trajectory of an air-breathing supersonic vehicle with the maximum flight range and maximum landing velocity under the conditions of process constraints such as overload and dynamic pressure by the weighted summation method. It is proved that this method can solve the comprehensive optimization problem of multiple optimization objectives effectively and provides a new thought for the optimization of related fields.","PeriodicalId":506941,"journal":{"name":"Journal of Physics: Conference Series","volume":"191 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141841716","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}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2774/1/012024
Xiangguo Liu, Huijun Du, Zhonglong Wang, Jianfei Chen, Jia Peng, Yue Liu
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.
{"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}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2795/1/012020
Xinyu Wang, Chengyan Xiong, Huilong Luo, Yuping Xia, Peijian Du, Xiaochuan Yang
In view of the complex climate in high altitude areas, a high altitude CO 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 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 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 2 heat pumps have significant advantages in high-altitude heating applications and provides a reference for subsequent studies.
{"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}
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.
{"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}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2774/1/012058
Ye Ai, Ruixuan Bi, Mengchao Ma, Pei Li, Lina Chen, Haifeng Li
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.
{"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}
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.
{"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}
Pub Date : 2024-07-01DOI: 10.1088/1742-6596/2790/1/012013
Jianli Chen, Yaohua Fan, Libo Wan, Weifeng Wu
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.
具有梯度润湿性的表面在自清洁效率、抗污染性能和流体操控方面优于单一的超疏水表面。这些特性为各种工业和科学领域提供了广泛的应用潜力。本研究介绍并采用纳秒脉冲激光烧蚀技术，在 Ti6Al4V 合金上形成具有坚固交联框架微结构的润湿性梯度表面。实验结果表明，通过改变与液固接触部分相关的脊宽（w），我们可以在这些交联框架微结构中实现不同的润湿性和机械耐久性。润湿性测试表明，静态接触角从 150.7° 到 105.45°不等。此外，砂纸线性磨损测试表明，材料磨损率随着 w 的增加而降低。在类似的测试条件下，与其他两种普遍的润湿性表面结构相比，所提出的表面具有更高的机械耐久性。通过纳秒激光制造技术高效、环保地生产出的拟议表面在各种应用领域具有巨大潜力。
{"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}
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