Pub Date : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9783984
Xin Zhang, Mengyong Duan, Ruifeng Xu, H. Rao, Jingzhu Deng
The cloud-edge system in the power distribution Internet of Things (PDIoT) is the key technology to support the vision of comprehensively controllable power system. In order to evaluate the performance of the cloud-edge system in the PDIoT, this paper proposes the power distribution service model and information interaction model based on the architecture and service of the cloud-edge system in the PDIoT. Then, three kinds of computing resource configuration strategies are proposed, which includes single cloud configuration strategy, single layer configuration strategy and double layer configuration strategy. Finally, different configuration strategies are compared and analyzed on the simulation platform of EdgeCloudSim. The proposed method provides an effective tool for the analysis of cloud-edge system in the PDIoT.
{"title":"EdgeCloudSim Based Computing Resource Configuration Strategy Analysis of Cloud-Edge System in Power Distribution Internet of Things","authors":"Xin Zhang, Mengyong Duan, Ruifeng Xu, H. Rao, Jingzhu Deng","doi":"10.1109/ACPEE53904.2022.9783984","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783984","url":null,"abstract":"The cloud-edge system in the power distribution Internet of Things (PDIoT) is the key technology to support the vision of comprehensively controllable power system. In order to evaluate the performance of the cloud-edge system in the PDIoT, this paper proposes the power distribution service model and information interaction model based on the architecture and service of the cloud-edge system in the PDIoT. Then, three kinds of computing resource configuration strategies are proposed, which includes single cloud configuration strategy, single layer configuration strategy and double layer configuration strategy. Finally, different configuration strategies are compared and analyzed on the simulation platform of EdgeCloudSim. The proposed method provides an effective tool for the analysis of cloud-edge system in the PDIoT.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122053666","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9783679
Han Zhang, Wei Hu, Xiongjie Xie, Zuoming Xu, P. Yin, B. Wan
With the wide application of dry-type bushing, the insulation deterioration of its main insulating material—resin impregnated paper has been widely concerned. Firstly, the resin impregnated paper insulation material was subjected to constant temperature thermal aging test at 115℃; Then, the dielectric properties and power frequency breakdown of the insulation materials with different thermal aging time were tested; Finally, based on the in-depth analysis of effect of aging on dielectric response in frequency domain, an aging evaluation method based on dielectric modulus analysis was proposed. The results show that thermal aging has a significant effect on the insulation performance of the resin impregnated paper composite. The real part of capacitance of the resin impregnated paper insulation increases significantly in the low-frequency region, and obvious loss peak appears in the curves; Compared with the new sample, the power frequency electrical strength of thermal aged for 168, 336, 504, 672, 840 and 1008h decrease by 4.34%, 5.79%, 8.88%, 12.6%, 13.84% and 16.53%, respectively; The dielectric modulus spectrum has obvious relaxation peak in the low-frequency region, the integral area of the imaginary part of dielectric modulus (Amc%) can characterize the aging degree of the resin impregnated paper insulation, and Amc% has a high exponential function relationship with the aging time. It is helpful to realize the quantitative evaluation of aging status of resin impregnated paper insulation.
{"title":"Study on Aging Properties of Resin Impregnated Paper Composite for Dry-type Bushing","authors":"Han Zhang, Wei Hu, Xiongjie Xie, Zuoming Xu, P. Yin, B. Wan","doi":"10.1109/ACPEE53904.2022.9783679","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783679","url":null,"abstract":"With the wide application of dry-type bushing, the insulation deterioration of its main insulating material—resin impregnated paper has been widely concerned. Firstly, the resin impregnated paper insulation material was subjected to constant temperature thermal aging test at 115℃; Then, the dielectric properties and power frequency breakdown of the insulation materials with different thermal aging time were tested; Finally, based on the in-depth analysis of effect of aging on dielectric response in frequency domain, an aging evaluation method based on dielectric modulus analysis was proposed. The results show that thermal aging has a significant effect on the insulation performance of the resin impregnated paper composite. The real part of capacitance of the resin impregnated paper insulation increases significantly in the low-frequency region, and obvious loss peak appears in the curves; Compared with the new sample, the power frequency electrical strength of thermal aged for 168, 336, 504, 672, 840 and 1008h decrease by 4.34%, 5.79%, 8.88%, 12.6%, 13.84% and 16.53%, respectively; The dielectric modulus spectrum has obvious relaxation peak in the low-frequency region, the integral area of the imaginary part of dielectric modulus (Amc%) can characterize the aging degree of the resin impregnated paper insulation, and Amc% has a high exponential function relationship with the aging time. It is helpful to realize the quantitative evaluation of aging status of resin impregnated paper insulation.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117103029","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9784085
Qingqing Chen, Mi Zhou, Ziwen Cai, Sheng Su
Compare to outside threats, insider threats that originate within targeted systems are more destructive and invisible. More importantly, it is more difficult to detect and mitigate these insider threats, which poses significant cyber security challenges to an industry control system (ICS) tightly coupled with today’s information technology infrastructure. Currently, power utilities rely mainly on the authentication mechanism to prevent insider threats. If an internal intruder breaks the protection barrier, it is hard to identify and intervene in time to prevent harmful damage. Based on the existing in-depth security defense system, this paper proposes an insider threat protection scheme for ICSs of power utilities. This protection scheme can conduct compliance check by taking advantage of the characteristics of its business process compliance and the nesting of upstream and downstream business processes. Taking the Advanced Metering Infrastructures (AMIs) in power utilities as an example, the potential insider threats of violation and misoperation under the current management mechanism are identified after the analysis of remote charge control operation. According to the business process, a scheme of compliance check for remote charge control command is presented. Finally, the analysis results of a specific example demonstrate that the proposed scheme can effectively prevent the consumers’ power outage due to insider threats.
{"title":"Compliance Checking Based Detection of Insider Threat in Industrial Control System of Power Utilities","authors":"Qingqing Chen, Mi Zhou, Ziwen Cai, Sheng Su","doi":"10.1109/ACPEE53904.2022.9784085","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9784085","url":null,"abstract":"Compare to outside threats, insider threats that originate within targeted systems are more destructive and invisible. More importantly, it is more difficult to detect and mitigate these insider threats, which poses significant cyber security challenges to an industry control system (ICS) tightly coupled with today’s information technology infrastructure. Currently, power utilities rely mainly on the authentication mechanism to prevent insider threats. If an internal intruder breaks the protection barrier, it is hard to identify and intervene in time to prevent harmful damage. Based on the existing in-depth security defense system, this paper proposes an insider threat protection scheme for ICSs of power utilities. This protection scheme can conduct compliance check by taking advantage of the characteristics of its business process compliance and the nesting of upstream and downstream business processes. Taking the Advanced Metering Infrastructures (AMIs) in power utilities as an example, the potential insider threats of violation and misoperation under the current management mechanism are identified after the analysis of remote charge control operation. According to the business process, a scheme of compliance check for remote charge control command is presented. Finally, the analysis results of a specific example demonstrate that the proposed scheme can effectively prevent the consumers’ power outage due to insider threats.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129819809","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}
Raman spectroscopy detecting technique rapidly develops in the field of material composition detection, including electrical insulation materials. In this paper, three kinds of mineral insulating oil are selected to form three experimental control groups with insulating paper. Take samples of aging oil according to specified aging time to collect Raman spectrums, establishing a data set for each group, respectively. In addition, a new diagnostic model is introduced, which consists of wavelet scattering network and kernel SVM fulfilling recognition of different aging stages. It shows that all classification accuracy results are above 90%, where validates that scattering features transformed from Raman spectrums are effectively classified by proposed model.
{"title":"The Study on Oil-paper Insulation Classification with Scattering Features of Raman spectrum","authors":"Ruyue Zhang, Weigen Chen, Ruimin Song, Zhixian Yin","doi":"10.1109/ACPEE53904.2022.9783632","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783632","url":null,"abstract":"Raman spectroscopy detecting technique rapidly develops in the field of material composition detection, including electrical insulation materials. In this paper, three kinds of mineral insulating oil are selected to form three experimental control groups with insulating paper. Take samples of aging oil according to specified aging time to collect Raman spectrums, establishing a data set for each group, respectively. In addition, a new diagnostic model is introduced, which consists of wavelet scattering network and kernel SVM fulfilling recognition of different aging stages. It shows that all classification accuracy results are above 90%, where validates that scattering features transformed from Raman spectrums are effectively classified by proposed model.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124575888","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9783841
Longlong Li, S. Xia, Zuyi Ren, Qing Zhao, Liuyang Peng, Ran Duan, Qing Fang, Lei Zhao
With the continuous development of renewable energy power generation and the rapid increase of grid-connected capacity, the impact of its power generation instability on the power system cannot be ignored. Especially under the background of building a new power system based on renewable energy, it is urgent to improve the perception and control level of renewable energy power generation units. At present, the control methods for renewable energy power stations are relatively extensive. Generally, the grid-connected circuit switch of the renewable energy station or the collection circuit switch at the low-voltage side of the transformer is directly turned off, which is likely to cause a large over-cut and increase the workload for re-gridding. At the same time, the supporting capacity of the reactive equipment in the renewable energy station has been lost. The construction and promotion of renewable energy panoramic monitoring system can comprehensively monitor the operation status of renewable energy stations, enable renewable energy stations to participate in the power grid security and stability control in a more flexible way, enrich and improve the security control methods of the large power grid, and reduce the impact of power system faults on the power generation of renewable energy stations.
{"title":"Research and Application of Renewable Energy Panoramic Monitoring Technology","authors":"Longlong Li, S. Xia, Zuyi Ren, Qing Zhao, Liuyang Peng, Ran Duan, Qing Fang, Lei Zhao","doi":"10.1109/ACPEE53904.2022.9783841","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783841","url":null,"abstract":"With the continuous development of renewable energy power generation and the rapid increase of grid-connected capacity, the impact of its power generation instability on the power system cannot be ignored. Especially under the background of building a new power system based on renewable energy, it is urgent to improve the perception and control level of renewable energy power generation units. At present, the control methods for renewable energy power stations are relatively extensive. Generally, the grid-connected circuit switch of the renewable energy station or the collection circuit switch at the low-voltage side of the transformer is directly turned off, which is likely to cause a large over-cut and increase the workload for re-gridding. At the same time, the supporting capacity of the reactive equipment in the renewable energy station has been lost. The construction and promotion of renewable energy panoramic monitoring system can comprehensively monitor the operation status of renewable energy stations, enable renewable energy stations to participate in the power grid security and stability control in a more flexible way, enrich and improve the security control methods of the large power grid, and reduce the impact of power system faults on the power generation of renewable energy stations.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129915535","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9784084
Yang Liu, Lisheng Li, Yong Li, Mingyang Li, Min Huang, Haidong Yu, Wenbin Liu
The application of distributed photovoltaic (PV) systems in the power grid is more and more extensive. PV fluctuations are strong, and the stability is poor. The large-scale access of PV not only increases the complexity of the distribution network structure, but also bring some adverse effects, such as making the running of the power grid more difficult. The paper focuses on cluster partition and reactive power optimization problems with large-scale distributed generation. Firstly, the K-means clustering algorithm improved by IGA is applied to find out a better initial clustering center. And then the distribution network is set off into clusters based on the electrical distance between nodes. Taking the total voltage offset of the nodes and the lowest loss of the line active power as the objective function, the BAS-IGA algorithm optimizes the reactive power of the power system. Finally, the simulation result verifies the effectiveness of the proposed cluster partition and reactive power optimization ploy.
{"title":"Distributed Photovoltaic Cluster Partition and Reactive Power Optimization Strategy Based on BAS-IGA Algorithm","authors":"Yang Liu, Lisheng Li, Yong Li, Mingyang Li, Min Huang, Haidong Yu, Wenbin Liu","doi":"10.1109/ACPEE53904.2022.9784084","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9784084","url":null,"abstract":"The application of distributed photovoltaic (PV) systems in the power grid is more and more extensive. PV fluctuations are strong, and the stability is poor. The large-scale access of PV not only increases the complexity of the distribution network structure, but also bring some adverse effects, such as making the running of the power grid more difficult. The paper focuses on cluster partition and reactive power optimization problems with large-scale distributed generation. Firstly, the K-means clustering algorithm improved by IGA is applied to find out a better initial clustering center. And then the distribution network is set off into clusters based on the electrical distance between nodes. Taking the total voltage offset of the nodes and the lowest loss of the line active power as the objective function, the BAS-IGA algorithm optimizes the reactive power of the power system. Finally, the simulation result verifies the effectiveness of the proposed cluster partition and reactive power optimization ploy.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130490710","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9783995
Nini Yuan, Zhuangzhuang Yu, Youfu Zhang, Haojing Chang, Hewen Kang
Ultra-Fast DC charging station is a novel technology appeared to Electric Vehicle charging market, which is attractive for the operator and EV drivers by virtue of its fast charging speed for 10 mins to fulfill an EV and high efficiency of charging power. Current studies mainly focus on overall charging behaviors such as EV types, charging control method and customers charging frequencies. However, there is lack of research concluding the progress of Ultra-Fast DC charging station.This paper reviews the development and accomplishment of Ultra-Fast DC charging station. It built up in the following sections: the scale of fast charging station, advanced technology, upgradability, grid impact, the impact on EV penetration level, availability and commercial assessment. This investigation can guide further research towards DC fast charging station. The technology of fast charging station is already mature until now. The government support is the pillar of establishing consortium to activate charging stations in practice. More study should pay attention to how to enact government policy to promote charging units and how technology can solve grid impact of charging stations. In addition, new business model and how to set up charging price should be considered carefully.This review paper provides a powerful tool to enable UltraFast DC charging station come from scientific research into life, which can not only benefit EV users, but also operators to reduce expenditure and increase profit to accommodate large number EVs on the networks.
{"title":"Review of Electric Vehicle Ultra-Fast DC Charging Station","authors":"Nini Yuan, Zhuangzhuang Yu, Youfu Zhang, Haojing Chang, Hewen Kang","doi":"10.1109/ACPEE53904.2022.9783995","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783995","url":null,"abstract":"Ultra-Fast DC charging station is a novel technology appeared to Electric Vehicle charging market, which is attractive for the operator and EV drivers by virtue of its fast charging speed for 10 mins to fulfill an EV and high efficiency of charging power. Current studies mainly focus on overall charging behaviors such as EV types, charging control method and customers charging frequencies. However, there is lack of research concluding the progress of Ultra-Fast DC charging station.This paper reviews the development and accomplishment of Ultra-Fast DC charging station. It built up in the following sections: the scale of fast charging station, advanced technology, upgradability, grid impact, the impact on EV penetration level, availability and commercial assessment. This investigation can guide further research towards DC fast charging station. The technology of fast charging station is already mature until now. The government support is the pillar of establishing consortium to activate charging stations in practice. More study should pay attention to how to enact government policy to promote charging units and how technology can solve grid impact of charging stations. In addition, new business model and how to set up charging price should be considered carefully.This review paper provides a powerful tool to enable UltraFast DC charging station come from scientific research into life, which can not only benefit EV users, but also operators to reduce expenditure and increase profit to accommodate large number EVs on the networks.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"136 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116343276","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9783917
Yaqi Shen, Jing Ma, Yuanpei Gu
Concerning the suppression of oscillation in PMSG wind farm, a constrained multi parameter collaborative optimization control strategy is established. Firstly, the integrated dissipation energy of PMSG wind farm is derived. Then the influence of control links, wind speed and location on the stability of wind power grid connected system is studied. On this basis, combined with the three oscillation states in the wind farm, the goal is to minimize the integrated dissipated energy of the wind farm. According to the influence law of parameters, the constraint conditions are formulated respectively, and the boundary conditions to ensure the steady-state operation of grid connected system are comprehensively considered. Finally, the model of IEEE 10-machine 39-bus system with PMSG wind farm is constructed in RTDS. Simulation results verify that, the proposed parameter optimization strategy can improve the power angle stability of the system.
{"title":"Research on low frequency oscillation control strategy of PMSG-wind farm grid connected system","authors":"Yaqi Shen, Jing Ma, Yuanpei Gu","doi":"10.1109/ACPEE53904.2022.9783917","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783917","url":null,"abstract":"Concerning the suppression of oscillation in PMSG wind farm, a constrained multi parameter collaborative optimization control strategy is established. Firstly, the integrated dissipation energy of PMSG wind farm is derived. Then the influence of control links, wind speed and location on the stability of wind power grid connected system is studied. On this basis, combined with the three oscillation states in the wind farm, the goal is to minimize the integrated dissipated energy of the wind farm. According to the influence law of parameters, the constraint conditions are formulated respectively, and the boundary conditions to ensure the steady-state operation of grid connected system are comprehensively considered. Finally, the model of IEEE 10-machine 39-bus system with PMSG wind farm is constructed in RTDS. Simulation results verify that, the proposed parameter optimization strategy can improve the power angle stability of the system.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114729293","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9783794
Fei He, Xiangping Kong, Chi Zhang, Miao Zhu, Y. Chi, Yan Li, XiaoqingYu, Anni Yu
Since 2010, wind power has been connected to the grid on a large scale, resulting in great changes in China's energy structure. By the end of 2017, China's cumulative wind power installed capacity was 164 million KW, mainly concentrated in the "Three North" areas of China. By 2020, the installed capacity of wind power in China has reached 210 million KW. Wind power generation is know for it’s fluctuation, nonlinear complexity and multiple time scales. Its grid connected operation will have a certain impact on the power system. In addition, due to the characteristics of energy and load reverse distribution in China, when dealing with long-distance transmission, access to VSC-HVDC would be the first thought because of its advantages of large capacity, high voltage level and low loss. At present, China mainly uses wind and fire binding to connect to HVDC transmission system to realize long-distance transmission of wind energy. During the 13th Five Year Plan period, China added about 130 million kilowatts of inter provincial power transmission, built DC and other transmission channels, and maximized the proportion of renewable energy transmission. At present, China is in the stage of large-scale cluster grid connection of renewable energy. Significant changes have taken place in the power supply structure and transmission mode of the power system, and oscillation has become the norm. However, research ragarding the subsynchronous oscillation mechanism of wind farm and grid connected HVDC system is not through, and it is impossible to talk about the complete theoretical system and recognized modeling method. In addition, the decentralized access of renewable energy with high penetration rate in China is developing rapidly, and the access proportion of power electronic equipment on the load side is high, which will aggravate the occurrence of oscillation. The generation and interaction of subsynchronous oscillation are complex due to different modes and load structures, but the related research is based on the subsynchronous oscillation characteristics of high proportion power electronic devices. Therefore, the research on the generation process of subsynchronous oscillation of direct drive wind turbine will provide a theoretical basis for leading the industrial upgrading of wind turbine. The interaction of subsynchronous oscillation of multiple groups of direct driven wind farms is studied to provide a theoretical basis for improving the friendliness of wind power.
{"title":"Synchronous Oscillation of Direct Drive Offshore Wind Farm Connected to HVDC System","authors":"Fei He, Xiangping Kong, Chi Zhang, Miao Zhu, Y. Chi, Yan Li, XiaoqingYu, Anni Yu","doi":"10.1109/ACPEE53904.2022.9783794","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783794","url":null,"abstract":"Since 2010, wind power has been connected to the grid on a large scale, resulting in great changes in China's energy structure. By the end of 2017, China's cumulative wind power installed capacity was 164 million KW, mainly concentrated in the \"Three North\" areas of China. By 2020, the installed capacity of wind power in China has reached 210 million KW. Wind power generation is know for it’s fluctuation, nonlinear complexity and multiple time scales. Its grid connected operation will have a certain impact on the power system. In addition, due to the characteristics of energy and load reverse distribution in China, when dealing with long-distance transmission, access to VSC-HVDC would be the first thought because of its advantages of large capacity, high voltage level and low loss. At present, China mainly uses wind and fire binding to connect to HVDC transmission system to realize long-distance transmission of wind energy. During the 13th Five Year Plan period, China added about 130 million kilowatts of inter provincial power transmission, built DC and other transmission channels, and maximized the proportion of renewable energy transmission. At present, China is in the stage of large-scale cluster grid connection of renewable energy. Significant changes have taken place in the power supply structure and transmission mode of the power system, and oscillation has become the norm. However, research ragarding the subsynchronous oscillation mechanism of wind farm and grid connected HVDC system is not through, and it is impossible to talk about the complete theoretical system and recognized modeling method. In addition, the decentralized access of renewable energy with high penetration rate in China is developing rapidly, and the access proportion of power electronic equipment on the load side is high, which will aggravate the occurrence of oscillation. The generation and interaction of subsynchronous oscillation are complex due to different modes and load structures, but the related research is based on the subsynchronous oscillation characteristics of high proportion power electronic devices. Therefore, the research on the generation process of subsynchronous oscillation of direct drive wind turbine will provide a theoretical basis for leading the industrial upgrading of wind turbine. The interaction of subsynchronous oscillation of multiple groups of direct driven wind farms is studied to provide a theoretical basis for improving the friendliness of wind power.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127738710","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 : 2022-04-01DOI: 10.1109/ACPEE53904.2022.9783797
Yajun Zou, Fan Yang, Yun Zhao, Wei Wang, Yanbo Wang, Dawei Wang, Haibin Wan
Electrocatalytic water splitting reaction is a sustainable method for producing hydrogen at a large scale, which provides a promising pathway for energy transition. However, electrocatalyst activity remains a limitation restricting the energy conversion efficiency of water electrolysis systems. In this study, a three-dimensional hierarchical heterostructure electrocatalyst with vertically aligned NiFe layered double hydroxides (LDH) nanoflakes/Fe-NiSx nanoparticles supported on biomass-derived carbons was constructed. The experimental results proved that the catalyst has good activity and duralibity toward electrocatalytic hydrogen evolution in alkaline solutions. The electrode exhibits an electrocatalytic activity requiring an overpotential of 169 mV for delivering a current density of targeted 10 mA•cm-2 in HER; catalytic activity does not decay significantly within 15 h. Combined with the calculation results of density functional theory, the unique three-dimensional configuration of the catalyst, the high conductivity of the carbon microtube support, and the strong coupling effect at the interface between NiFe LDH and Fe-NiSx accelerates electron/ion transfer, further facilitating the reaction kinetics of hydrogen evolution.
{"title":"Construction of Biomass-Derived Hybrid Electrodes for High-Performance Hydrogen Evolution Reaction","authors":"Yajun Zou, Fan Yang, Yun Zhao, Wei Wang, Yanbo Wang, Dawei Wang, Haibin Wan","doi":"10.1109/ACPEE53904.2022.9783797","DOIUrl":"https://doi.org/10.1109/ACPEE53904.2022.9783797","url":null,"abstract":"Electrocatalytic water splitting reaction is a sustainable method for producing hydrogen at a large scale, which provides a promising pathway for energy transition. However, electrocatalyst activity remains a limitation restricting the energy conversion efficiency of water electrolysis systems. In this study, a three-dimensional hierarchical heterostructure electrocatalyst with vertically aligned NiFe layered double hydroxides (LDH) nanoflakes/Fe-NiSx nanoparticles supported on biomass-derived carbons was constructed. The experimental results proved that the catalyst has good activity and duralibity toward electrocatalytic hydrogen evolution in alkaline solutions. The electrode exhibits an electrocatalytic activity requiring an overpotential of 169 mV for delivering a current density of targeted 10 mA•cm-2 in HER; catalytic activity does not decay significantly within 15 h. Combined with the calculation results of density functional theory, the unique three-dimensional configuration of the catalyst, the high conductivity of the carbon microtube support, and the strong coupling effect at the interface between NiFe LDH and Fe-NiSx accelerates electron/ion transfer, further facilitating the reaction kinetics of hydrogen evolution.","PeriodicalId":118112,"journal":{"name":"2022 7th Asia Conference on Power and Electrical Engineering (ACPEE)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126503127","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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