Pub Date : 2021-12-01DOI: 10.1109/ATEEE54283.2021.00020
Jing Wu, Weiyan Zheng, Yanping Jiang, Tao Jiang, Yunning Zhang
Energy storage technology can greatly promote the smooth supply of electric energy to the grid and facilitate the stability of the power system. However, it is difficult to control the same charging and discharge power of energy storage units with the increasing scale of energy storage power stations. Switched capacitance method is proposed to achieve energy balance between large-scale batteries in this paper, which is easy to implement and more suitable for applications with high power density and energy density. Supercapacitors as energy transfer components are presented to achieve the balance of the high-capacity battery pack. The novel method of parameter selection of supercapacitors, the analysis method of factors that affect the speed of the switched capacitor method are introduced. A two-stage balance main circuit is proposed to simulate the multi-box lithium battery pack’s balance and verify its validity. It is proved that the switched capacitance method proposed in this paper can clearly reflect the battery’s energy state reasonably. Compared with other methods, it has the better compromised performance with small volume, high equalization efficiency and fast equalization speed.
{"title":"Dynamic Equalization Control of Battery Pack Based on Switched Capacitance Method","authors":"Jing Wu, Weiyan Zheng, Yanping Jiang, Tao Jiang, Yunning Zhang","doi":"10.1109/ATEEE54283.2021.00020","DOIUrl":"https://doi.org/10.1109/ATEEE54283.2021.00020","url":null,"abstract":"Energy storage technology can greatly promote the smooth supply of electric energy to the grid and facilitate the stability of the power system. However, it is difficult to control the same charging and discharge power of energy storage units with the increasing scale of energy storage power stations. Switched capacitance method is proposed to achieve energy balance between large-scale batteries in this paper, which is easy to implement and more suitable for applications with high power density and energy density. Supercapacitors as energy transfer components are presented to achieve the balance of the high-capacity battery pack. The novel method of parameter selection of supercapacitors, the analysis method of factors that affect the speed of the switched capacitor method are introduced. A two-stage balance main circuit is proposed to simulate the multi-box lithium battery pack’s balance and verify its validity. It is proved that the switched capacitance method proposed in this paper can clearly reflect the battery’s energy state reasonably. Compared with other methods, it has the better compromised performance with small volume, high equalization efficiency and fast equalization speed.","PeriodicalId":62545,"journal":{"name":"电工电能新技术","volume":"22 1","pages":"56-61"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89131923","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}
A large number of clean energy sources, such as distributed photovoltaics and wind power are connected to the grid, which further increases the number of electric energy metering devices. Three-phase three-wire electric energy meters connected by PT and CT are widely used in low-current grounding systems of 35kV and below, and due to the complicated wiring, there are a large number of wrong wiring on site, resulting in inaccurate measurement and loss of state-owned assets. Therefore, higher requirements are put forward for the ability of on-site staff to check and analyze the wrong wiring of the electric energy meter. Aiming at the situation of incorrect measurement caused by the current loop failure, this paper proposes a simple analysis method for the secondary outlet and current of the electric energy meter of the sum and difference current, which greatly improves the accuracy of the analysis and shortens the analysis time. The effectiveness of this method is verified through the analysis of numerical examples.
{"title":"Research on Analysis Method of Current Loop Fault in High Voltage Electric Energy Metering Device","authors":"Chaonan Liu, Hongzhen Fan, Yuchen Tian, Jinliang Wang, Hao Zhang, Weiwei Yang","doi":"10.1109/ATEEE54283.2021.00017","DOIUrl":"https://doi.org/10.1109/ATEEE54283.2021.00017","url":null,"abstract":"A large number of clean energy sources, such as distributed photovoltaics and wind power are connected to the grid, which further increases the number of electric energy metering devices. Three-phase three-wire electric energy meters connected by PT and CT are widely used in low-current grounding systems of 35kV and below, and due to the complicated wiring, there are a large number of wrong wiring on site, resulting in inaccurate measurement and loss of state-owned assets. Therefore, higher requirements are put forward for the ability of on-site staff to check and analyze the wrong wiring of the electric energy meter. Aiming at the situation of incorrect measurement caused by the current loop failure, this paper proposes a simple analysis method for the secondary outlet and current of the electric energy meter of the sum and difference current, which greatly improves the accuracy of the analysis and shortens the analysis time. The effectiveness of this method is verified through the analysis of numerical examples.","PeriodicalId":62545,"journal":{"name":"电工电能新技术","volume":"26 1","pages":"41-45"},"PeriodicalIF":0.0,"publicationDate":"2021-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81971689","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}
Many problems such as deviation and instability of frequency and voltage of the power system caused by wind power paralleling in the grid can be effectively alleviated with the energy storage system.Analysis of the optimal capacity of the battery is a key issue in the research of the wind/storage system because of its high cost.This paper proposes a method to reduce the demand capacity of the battery energy storage system(BESS) based on the amending forecasted power by analyzing the reason of large demand capacity.And BESS is controlled according to the amending forecasted power,which make the curve of change of SOC(state of charge) smoother.The effectiveness and feasibility of this method is verified by the actual wind generation output data within 48 hours and the simulation results with PSCAD.
{"title":"Analysis of capacity requirements of battery energy storage based on forecasted wind power correction","authors":"Zhu Jian-hong","doi":"10.1049/CP.2012.1827","DOIUrl":"https://doi.org/10.1049/CP.2012.1827","url":null,"abstract":"Many problems such as deviation and instability of frequency and voltage of the power system caused by wind power paralleling in the grid can be effectively alleviated with the energy storage system.Analysis of the optimal capacity of the battery is a key issue in the research of the wind/storage system because of its high cost.This paper proposes a method to reduce the demand capacity of the battery energy storage system(BESS) based on the amending forecasted power by analyzing the reason of large demand capacity.And BESS is controlled according to the amending forecasted power,which make the curve of change of SOC(state of charge) smoother.The effectiveness and feasibility of this method is verified by the actual wind generation output data within 48 hours and the simulation results with PSCAD.","PeriodicalId":62545,"journal":{"name":"电工电能新技术","volume":"60 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2012-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83923893","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 : 2008-01-01DOI: 10.1007/978-3-540-75997-3_1
D. Goswami
{"title":"A Review and Future Prospects of Renewable Energy in the Global Energy System","authors":"D. Goswami","doi":"10.1007/978-3-540-75997-3_1","DOIUrl":"https://doi.org/10.1007/978-3-540-75997-3_1","url":null,"abstract":"","PeriodicalId":62545,"journal":{"name":"电工电能新技术","volume":"27 1","pages":"3-10"},"PeriodicalIF":0.0,"publicationDate":"2008-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81437693","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 : 2007-01-01DOI: 10.1109/apec.2006.1620562
Huang Lipei
The traditional deadbeat control for UPS inverters has a robustness problem.The parameter imprecision greatly harms the stability of the system.A novel deadbeat control method-the progressively converging deadbeat control-is proposed in this paper to deal with the problem.In the traditional deadbeat control method the sinusoidal signal serves as the voltage reference,while in the novel control method the weighted average of the sinusoidal reference signal and the current output voltage signal is chosen as the target value of the next sampling instant.The weighing value can be adjusted according to the systematic performance.A 1kVA prototype was built based on DSP.Theoretical analysis and experimental results show that the progressively converging deadbeat control has small static error and fast dynamic response.Further analysis proves that the robustness for parameter variation is better than the traditional deadbeat control.This method is an improvement of the traditional deadbeat control.
{"title":"Progressively converging deadbeat control for UPS inverter","authors":"Huang Lipei","doi":"10.1109/apec.2006.1620562","DOIUrl":"https://doi.org/10.1109/apec.2006.1620562","url":null,"abstract":"The traditional deadbeat control for UPS inverters has a robustness problem.The parameter imprecision greatly harms the stability of the system.A novel deadbeat control method-the progressively converging deadbeat control-is proposed in this paper to deal with the problem.In the traditional deadbeat control method the sinusoidal signal serves as the voltage reference,while in the novel control method the weighted average of the sinusoidal reference signal and the current output voltage signal is chosen as the target value of the next sampling instant.The weighing value can be adjusted according to the systematic performance.A 1kVA prototype was built based on DSP.Theoretical analysis and experimental results show that the progressively converging deadbeat control has small static error and fast dynamic response.Further analysis proves that the robustness for parameter variation is better than the traditional deadbeat control.This method is an improvement of the traditional deadbeat control.","PeriodicalId":62545,"journal":{"name":"电工电能新技术","volume":"12 3 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2007-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78399893","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 : 1990-01-01DOI: 10.1007/978-94-009-0769-0_73
Y. B. Lin, Y. L. Chen, L. Lin, S. Han
{"title":"Development of the Thermal Superconducting Switch and Research on its Closed Process","authors":"Y. B. Lin, Y. L. Chen, L. Lin, S. Han","doi":"10.1007/978-94-009-0769-0_73","DOIUrl":"https://doi.org/10.1007/978-94-009-0769-0_73","url":null,"abstract":"","PeriodicalId":62545,"journal":{"name":"电工电能新技术","volume":"41 1","pages":"425-430"},"PeriodicalIF":0.0,"publicationDate":"1990-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88003960","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}
Shofa Aulia Aldhama, Adji Candra Kurniawan, Nur Layli Rachmawati, O. Novawanda
{"title":"Model of consumer switching behavior analysis using PLS-SEM during Covid-19","authors":"Shofa Aulia Aldhama, Adji Candra Kurniawan, Nur Layli Rachmawati, O. Novawanda","doi":"10.1063/5.0118772","DOIUrl":"https://doi.org/10.1063/5.0118772","url":null,"abstract":"","PeriodicalId":62545,"journal":{"name":"电工电能新技术","volume":"9 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79079542","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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