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Computational Simulation on Power Prediction of Lithium Secondary Batteries by using Pulse-based Measurement Methods 基于脉冲测量方法的锂二次电池功率预测计算仿真
KEPCO Journal on electric power and energy Pub Date : 2015-09-30 DOI: 10.18770/KEPCO.2015.01.01.033
Joon-gi Park, Seoungwoo Byun, Williams Agyei Appiah, Sekyung Han, J. Choi, Myung-Hyun Ryou, Y. Lee
{"title":"Computational Simulation on Power Prediction of Lithium Secondary Batteries by using Pulse-based Measurement Methods","authors":"Joon-gi Park, Seoungwoo Byun, Williams Agyei Appiah, Sekyung Han, J. Choi, Myung-Hyun Ryou, Y. Lee","doi":"10.18770/KEPCO.2015.01.01.033","DOIUrl":"https://doi.org/10.18770/KEPCO.2015.01.01.033","url":null,"abstract":"시간대별 효율적인 전력 운영과 전력품질 향상을 위해 ESS (Energy Storage System)의 보급이 세계적으로 활발하 게 이루어지고 있다. 이러한 ESS용 전원소자로 리튬이차전지의 채용이 급격히 늘어남에 따라, 리튬이차전지의 수명 및 출력 열화 거동을 측정 및 예측하는 기술이 시급히 요구되고 있다. 특히, ESS 운영에 있어 핵심 특성인 리튬이차 전지 출력은 측정이 어려울 뿐만 아니라, 정확한 측정을 위해서는 많은 시간이 소요되는 문제점이 있다. 따라서, 본 연구에서는 ESS용 리튬이차전지 단전지를 전산 모델링 한 후, 펄스 측정법을 적용하여 충전상태에 따른 방전 및 충 전시의 직류저항(DC-IR)과 출력을 예측한다. 또한, 두 가지 펄스 측정법인 HPPC (Hybrid Pulse Power Characteristics)와 J-Pulse (JEVS D 713, Japan Electric Vehicle Association Standards)의 결과를 비교 분석한다. Energy storage systems (ESSs) have been utilized widely in the world to optimize the power operation system and to improve the power quality. As lithium secondary batteries are the main power supplier for ESSs, it is very important to predict its cycle and power degradation behavior. In particular, the power, one of the hardest electrochemical properties to measure, needs lots of resources such as time and facilities. Due to these difficulties, computer modelling of lithium secondary batteries is applied to predict the DC-IR and power value during charging and discharging as a function of state of charge (SOC) by using pulse-based measurement methods. Moreover, based on the hybrid pulse power characteristics (HPPC) and J-Pulse (JEVS D 713, Japan Electric Vehicle Association Standards) methods, their electrochemical properties are also compared and discussed. Keyword: Energy Storage System, Lithium Secondary Battery, Computer Modeling, Computational Simulation, Power","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127266865","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: 3
The Response to Impulse Signal on Three Phase Transformer using Vector Network Analyzer 矢量网络分析仪对三相变压器冲击信号的响应
KEPCO Journal on electric power and energy Pub Date : 2015-09-30 DOI: 10.18770/KEPCO.2015.01.01.079
Kwangho Kim, Jong-Hyon Jung, W. Nah
{"title":"The Response to Impulse Signal on Three Phase Transformer using Vector Network Analyzer","authors":"Kwangho Kim, Jong-Hyon Jung, W. Nah","doi":"10.18770/KEPCO.2015.01.01.079","DOIUrl":"https://doi.org/10.18770/KEPCO.2015.01.01.079","url":null,"abstract":"Abstract Transformer is widely used element on power system and industrial area. Especially the transformers installed at power system are exposed to an environment of arbitrary changed. Thus the prediction of degradation and the analysis of response to impulse are important. To conduct those works, the electrical characteristics of system should be analyzed, effectively. But the analysis of electrical characteristic in electric machine level such as pole and pad-mounted transformer is almost no, thus commercial VNA (Vector Network Analyzer) is used to getting the response in wide frequency range. However, the output power of VNA is usually under 10mW, so verification for effectiveness of measuring electrically large component should be conducted, firstly. Next, after getting total S-parameter of transformer, predicting impulse response can be performed in time-domain with circuit simulator. In this paper, it is introduced that verification effectiveness of VNA using transfer function from SFRA (Sweep Frequency Response Analyzer), firstly. Next, total S-parameter, six by six matix form, was built using measured 2 port S-parameter from vector network analyzer. To get the response to impulse which is defined by IEC 60060-1, time-domain simulation is conducted to ADS (Advenced Design System) circuit simulator.","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116087186","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
Development of the Control System for Fast-Responding Frequency Regulation in Power Systems using Large-Scale Energy Storage Systems 大型储能电力系统快速响应调频控制系统的研制
KEPCO Journal on electric power and energy Pub Date : 2015-09-30 DOI: 10.18770/KEPCO.2015.01.01.009
Geon-Pyo Lim, Chan-Wook Park, R. Labios, Yong-Beom Yoon
{"title":"Development of the Control System for Fast-Responding Frequency Regulation in Power Systems using Large-Scale Energy Storage Systems","authors":"Geon-Pyo Lim, Chan-Wook Park, R. Labios, Yong-Beom Yoon","doi":"10.18770/KEPCO.2015.01.01.009","DOIUrl":"https://doi.org/10.18770/KEPCO.2015.01.01.009","url":null,"abstract":"Abstract Energy storage systems (ESS) can be used to provide frequency regulation services in a power system to replace traditional frequency regulation power plants. Battery ESS, in particular, can provide “fast-responding frequency regulation,” wherein the facility can respond immediately and accurately to the frequency regulation signal sent by the system operator. This paper presents the development and the trial run results of a frequency regulation co ntrol system that uses large-scale ESS for use in a large pow er system. The control system was developed initially for the 4 MW ESS dem onstration facility in Jocheon Jeju Island, and was further deve loped for use in the 28 MW ESS facility at the Seo-Anseong substation an d the 24 MW ESS facility at the Shin-Yongin substation to pro vide frequency regulation services within mainland Korea. The ESS facility in Seo-Anseong substation responds to a sudden drop in frequency via governor-free control, while the ESS facility in Shin-Yongin responds via automatic generator control (AGC).","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129757432","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: 7
Development and Characterization of High Temperature Superconducting Wire for Superconducting Cable System 超导电缆系统用高温超导导线的研制与表征
KEPCO Journal on electric power and energy Pub Date : 2015-09-30 DOI: 10.18770/KEPCO.2015.01.01.151
B. Mean, Jae-Hun Lee, Young-Soon Kim, Hunju Lee, S. Moon
{"title":"Development and Characterization of High Temperature Superconducting Wire for Superconducting Cable System","authors":"B. Mean, Jae-Hun Lee, Young-Soon Kim, Hunju Lee, S. Moon","doi":"10.18770/KEPCO.2015.01.01.151","DOIUrl":"https://doi.org/10.18770/KEPCO.2015.01.01.151","url":null,"abstract":"In order to improve the properties of high-temperature superconducting wire for superconducting cable system, we optimized the electro-polishing (EP), ion-beam assisted deposition (IBAD), superconducting (SC) layer, and baking (heat) treatment. The buffer layer was deposited on electro-polished substrate with RMS roughness (R RMS ) less than 5 nm. The IBAD process was carried out at V beam : 1100 V and V accel : 850 V that resulted in highly crystalline film of LaMnO 3 . Chemical composition of SC layer is key to higher critical current, and we found that composition can be determined by surface color of SC layer. We adopt a proprietary contorl system based on RGB analysis of the surface and achieved critical current of 150 A/4 mm-width. The proposed baking treatment resulted in decreasing of about 10% of fraction defects.","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122292356","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
Study on the Magnetic Shield Effect of Carbon-based Materials at Extremely Low Frequency 碳基材料的极低频磁屏蔽效应研究
KEPCO Journal on electric power and energy Pub Date : 2015-09-30 DOI: 10.18770/KEPCO.2015.01.01.015
S. Oh, Dong-Su Kang, Sang Min Lee, U. Baek, J. Roh
{"title":"Study on the Magnetic Shield Effect of Carbon-based Materials at Extremely Low Frequency","authors":"S. Oh, Dong-Su Kang, Sang Min Lee, U. Baek, J. Roh","doi":"10.18770/KEPCO.2015.01.01.015","DOIUrl":"https://doi.org/10.18770/KEPCO.2015.01.01.015","url":null,"abstract":"To examine the magnetic shielding effect for carbon-based materials at extremely low frequencies (60 Hz), two types of carbon black (Super-P and Denka Black) and a natural graphite (HC-198) were mixed into organic binder at 10 wt.% to produce a coating solution, and a powder coating with varying thickness was applied on an aluminum disk measuring 88 mm in radius. A device was developed to measure the sheielding effect at extremely low frequencies. A closed circuit was achieved by connecting a transformer and a resistor. The applied voltage was fixed at 65 V, and the magnetic field was measured to being the range of 4.95~5.10 mG. Depending on the thickness of the coating layer, the magnetic field showed a decreasing trend. The maximum decrease in the magnetic field of 38.3% was measured when natural graphite was coated with specimens averaging 455 μm. This study confirmed that carbonbased materials enable magnetic shielding at extremely low frequencies, and that the magnetic shielding effect can be enhanced by varying the coating thickness.","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131937934","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: 1
Study on the Distribution of Electromagnetic Force for 154 kV Power Transmission Cable on Dual Underground Lines by Normal and Earth Fault Current 正常和接地故障电流作用下双地下线路154 kV输电电缆电磁力分布的研究
KEPCO Journal on electric power and energy Pub Date : 2015-09-30 DOI: 10.18770/KEPCO.2015.01.01.021
H. Kim, S. Y. Kim, S. Im, G. Park
{"title":"Study on the Distribution of Electromagnetic Force for 154 kV Power Transmission Cable on Dual Underground Lines by Normal and Earth Fault Current","authors":"H. Kim, S. Y. Kim, S. Im, G. Park","doi":"10.18770/KEPCO.2015.01.01.021","DOIUrl":"https://doi.org/10.18770/KEPCO.2015.01.01.021","url":null,"abstract":"Abstract The goal of this study is the size and distribution of the electromagnetic force generated by the current flowing through the second underground line of 154kV power transmission cables by using electromagnetic finite element analysis. So we interpret how mutually electromagnetic force has an effect on the comparable judgement of Trefoil, Duct and Flat ,which shows in a numerical arrangement. 154kV OF 1200SQ Cable 1.281km not only is applicable to modeling for underground transmission cable but also examine the effect of line to line, phase to phase and size and direction of the electromagnetic force preparing for the occurrence of normal state and single-phase earth fault, which are arranged in trefoil, duct and flat formation between sections. As showing how the trajectory, and size distribution of the electromagnetic force translate as the arrangement of the cables when a steady-state current and a fault current flows on the underground cables, I hope that when Underground transmission is designed, this data will be useful information.","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115206362","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
신성장 산업인 ESS 시장과 LG Chem의 전략 新成长产业ESS市场和LG Chem的战略
KEPCO Journal on electric power and energy Pub Date : 1900-01-01 DOI: 10.18770/KEPCO.2016.02.01.029
Yeong-Min Kim
{"title":"신성장 산업인 ESS 시장과 LG Chem의 전략","authors":"Yeong-Min Kim","doi":"10.18770/KEPCO.2016.02.01.029","DOIUrl":"https://doi.org/10.18770/KEPCO.2016.02.01.029","url":null,"abstract":"","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"258 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115842979","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
`변전소자동화` 기술과 정책, 어떤 선택이 필요한가? 变电所自动化`技术和政策，需要什么样的选择?
KEPCO Journal on electric power and energy Pub Date : 1900-01-01 DOI: 10.18770/KEPCO.2016.02.03.353
Dong-Cheol Lee
{"title":"`변전소자동화` 기술과 정책, 어떤 선택이 필요한가?","authors":"Dong-Cheol Lee","doi":"10.18770/KEPCO.2016.02.03.353","DOIUrl":"https://doi.org/10.18770/KEPCO.2016.02.03.353","url":null,"abstract":"","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"214 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131869649","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
Test bed for Advanced function of Smart Inverter and Results Based on Real-Time Simulation Platform 智能逆变器高级功能试验台及基于实时仿真平台的实验结果
KEPCO Journal on electric power and energy Pub Date : 1900-01-01 DOI: 10.18770/KEPCO.2021.07.01.107
J. Sim, Min-Sung Ban, H. Lim, Seong-Bin Cho
{"title":"Test bed for Advanced function of Smart Inverter and Results Based on Real-Time Simulation Platform","authors":"J. Sim, Min-Sung Ban, H. Lim, Seong-Bin Cho","doi":"10.18770/KEPCO.2021.07.01.107","DOIUrl":"https://doi.org/10.18770/KEPCO.2021.07.01.107","url":null,"abstract":"","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"212 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114596873","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
Development of a TBM Advance Rate Model and Its Field Application Based on Full-Scale Shield TBM Tunneling Tests in 70 MPa of Artificial Rock Mass 基于70mpa人工岩体全尺寸盾构掘进试验的TBM超前速度模型建立及现场应用
KEPCO Journal on electric power and energy Pub Date : 1900-01-01 DOI: 10.18770/KEPCO.2020.06.03.305
Jungjoo Kim, Kyoung-Yul Kim, H. Ryu, Jung Ju Hwan, Sungyun Hong, S. Jo, Bae Du-San
{"title":"Development of a TBM Advance Rate Model and Its Field Application Based on Full-Scale Shield TBM Tunneling Tests in 70 MPa of Artificial Rock Mass","authors":"Jungjoo Kim, Kyoung-Yul Kim, H. Ryu, Jung Ju Hwan, Sungyun Hong, S. Jo, Bae Du-San","doi":"10.18770/KEPCO.2020.06.03.305","DOIUrl":"https://doi.org/10.18770/KEPCO.2020.06.03.305","url":null,"abstract":"","PeriodicalId":445819,"journal":{"name":"KEPCO Journal on electric power and energy","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1900-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125730122","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: 1
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