Pengfeng Lin, Peng Wang, Jianfang Xiao, Chi Jin, Junjun Wang, Koh Leong Hai
{"title":"Power Management of Multi-paralleled Bidirectional Interlinking Converters in Hybrid AC/DC Microgrids: A Dynamic Consensus Approach","authors":"Pengfeng Lin, Peng Wang, Jianfang Xiao, Chi Jin, Junjun Wang, Koh Leong Hai","doi":"10.1109/ACEPT.2018.8610765","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610765","url":null,"abstract":"Hybrid AC/DC microgrids (MG) offer a promising way to incorporate heterogeneous energy sources into AC or DC subgrids while minimizing energy conversions stages. For a MG working in long term, the capacities of both AC and DC subgrids would inevitably increase, which may result in more power interactions between the two subgrids. In this context, a single bidirectional interlinking converter (BIC) which bridges AC and DC subgrids may suffer from overstress. Hence, multi-paralleled BICs configuration should be adopted and well managed. This paper proposes a dynamic consensus approach for proportional power allocation among multiple BICs, thereby avoiding the overcurrent of a particular BIC and enhancing the flexibility of system communication. The effectiveness of the proposed power management strategy has been verified by simulation results.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125011030","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}
{"title":"Synchronous Rectifier Design Considerations for Solid-State Transformer Light-Load Stability","authors":"O. Yu, Chih-Shen Yeh, J. Lai","doi":"10.1109/ACEPT.2018.8610790","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610790","url":null,"abstract":"Increasing usage of high output voltage, low output current resonant-based DC-DC converter systems can face a stability issue when cycle-by-cycle drain-source synchronous rectification (SR) controllers are paired with low RDS, on rectifier switches. A current resonance phenomenon can be observed at low power conditions within the LLC resonant converter. This instability can lead to inconsistent SR operation, excessive conduction loss, output ripple, and poor light-load efficiency. In this paper, the issue is root caused, simulated, and an FPGAbased duty cycle rate limiter is built and tested to verify a possible method of alleviating the issue.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"86 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114882734","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}
S. Venkatachalam, Dhivya Sampath Kumar, Wenjie Zhang, D. Srinivasan, Anurag Sharma
{"title":"Feasibility And Economic Analysis of Solar Energy Systems for Rural Area Applications","authors":"S. Venkatachalam, Dhivya Sampath Kumar, Wenjie Zhang, D. Srinivasan, Anurag Sharma","doi":"10.1109/ACEPT.2018.8610850","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610850","url":null,"abstract":"Finding innovative ways of exploiting renewable energy sources to their fullest potential is already being considered as one of the utmost important research activities around the globe. This paper mainly focuses on the feasibility and economic analysis of solar water pumping systems in a remote village in India. Also, comparison of the same with conventional diesel-powered systems is carried out to study the pros and cons of both the systems. It is found from the analysis that the deployment of solar water pumping systems in an agriculture dependent nation like India has an upper hand in many aspects such as minimal environmental impacts, reduction of fossil fuel consumption, better profit margin etc. However, solar water pumping systems are still not treated as a viable option mainly because of the high upfront cost needed for the solar panels and pump. However, this can be easily negated via enhanced financial support schemes and incentives from the government. Considering all these factors, it is pertinent to deploy more of such projects on a larger scale all over the nation.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"47 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124777178","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}
{"title":"A Study on High Frequency Transformer Design in Medium-voltage Solid-state Transformers","authors":"Chih-Shen Yeh, J. Lai","doi":"10.1109/ACEPT.2018.8610778","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610778","url":null,"abstract":"High switching frequency (HF) operation of solid-state transformers (SSTs) reduces the weight and volume of magnetic parts. Yet in medium-voltage (MV) SSTs, electrical insulation becomes a great concern and demands extra spacing. To resolve the issue, resistive shielding technique is considered in this paper to mitigate the threat of partial discharge. In addition, geometric shaping is applied to alleviate local electrical field. On top of the insulation and size requirements, HF transformer design should also consider skin effect and other effects induced by ac electromagnetic field. This paper is meant to develop a planar transformer for a MV SST, taking all critical factors into account. 2-d finite element analysis is adopted as main research and conceptual verification method.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114624342","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}
{"title":"A New Voltage Balancer With DC-DC Converter Function","authors":"Sang-Hyuk Kim, Heung-Geun Kim, Honnyong Cha","doi":"10.1109/ACEPT.2018.8610826","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610826","url":null,"abstract":"In dc microgrid, a bipolar dc bus configuration has more merits than an unipolar one, due to higher reliability, easy grounding, and having more voltage levels. However, tight voltage balancing control is necessary to handle unbalanced power between positive and negative buses. To solve this issue effectively, this paper proposes a new voltage balancer with dc-dc converter function. The proposed balancer can serve as both a voltage balancer and a bidirectional dc-dc converter. Thus, it can be applied to battery management system or fast charger in electric vehicles (EVs) charging station while balancing the bipolar dc bus voltages. Unlike the conventional voltage balancing control using a three-level dc-dc converter, the voltage balancing range of the proposed system is not limited. To confirm this superiority, a comparison of the voltage balancing range between the proposed and conventional scheme is explored. Simulation and experimental results are provided in order to validate the effectiveness of the proposed system.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134119791","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}
{"title":"Preliminary Design of Ocean Thermal Energy Conversion (OTEC) Axial Turbine for Laboratory Scale","authors":"Irfan SyarifArief, D. R. Aldara","doi":"10.1109/ACEPT.2018.8610662","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610662","url":null,"abstract":"Indonesia faces a decreasing in fossil energy reserves about 3% every year and has not been matched by the discovery of new energy reserves. Therefore, it is necessary to increase the use of renewable Energy to meet energy needs. Renewable energy is energy derived from sustainable natural processes. Indonesia located in the tropical area, it has a lot of potential ocean energy. OTEC (Ocean Thermal Energy Conversion) is one of many renewable energy sources from the ocean. OTEC or Ocean Thermal Energy Conversion is one of the latest technologies that used the temperature difference between deep and shallow seawater. OTEC system generally used ammonia (NH3) as working fluid. Ammonia is used because it has a relatively low boiling point compared to water. OTEC system consists of evaporators, turbines, generators, condensers, and pumps. This research, the authors focused on the design of lab-scale OTEC turbines. 2 stage turbine will be varied the tilt which is 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 degree. The computational fluid dynamics (CFD) method is used in this research to simulate the OTEC Turbine. Based on the simulation results, the highest efficiency and net power is a 2 stage 40 degree turbine with 57.45% of efficiency and 287.25 kW of generated power.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134348852","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}
{"title":"A Generic Gate Driver for SiC MOSFETs with adjustable Positive and Negative Rail Voltage","authors":"Yeo Howe Li, Venkata Ravi Kishore Kanamarlapudi","doi":"10.1109/ACEPT.2018.8610828","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610828","url":null,"abstract":"SiC MOSFETs are well known for possessing lower losses compared with silicon MOSFETS or IGBTs. In order to drive them efficiently, suitable drivers must be designed. However, most commercially available drivers and drivers in literature are suitable for only a limited range of SiC MOSFETs due to limitations on the MOSFET's gate voltage ratings. Hence, the drivers do not allow the designer to easily experiment with different SiC MOSFET models. In this paper, a generic SiC gate driver with adjustable positive and negative voltage rail is presented. The performance of the proposed driver is compared with a commercially available driver through experiment and it is shown that the proposed gate driver is able to drive the chosen SiC MOSFET more efficiently.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115828801","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}
Dong Yang, Tong Zhang, Heyan Huang, Donghui Luo, T. Yuan, P. Sun
{"title":"The Simulation Model and Analysis of Transient Grounding Potential Rise in GIS Under VFTO","authors":"Dong Yang, Tong Zhang, Heyan Huang, Donghui Luo, T. Yuan, P. Sun","doi":"10.1109/ACEPT.2018.8610774","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610774","url":null,"abstract":"In recent years, gas-insulated substations (GIS) have been widely used in power systems. However, because of its compact structure, very fast transient overvoltage (VFTO) with frequencies up to tens or even hundreds of megabytes can easily occur when switching devices such as disconnectors and circuit breakers are operated. Through research, it has been found that the generation of VFTO can often cause the GIS shell circulation and transient ground potential to rise, resulting in significant losses.This paper takes a GIS test field as the object of analysis and proposes a distribution parameter analysis model for the transient process of such equipmentCby establishing a transient ground network model that takes into account the mutual inductance between grounding bodies, the potential change of the grounding grid and the change of the transient current at the point of entry are analyzed.The results show that the VFTO voltage of the key nodes in the GIS is affected by the external conditions of the GIS equipment. Changing the external conditions of GIS equipment, the GIS shell transient ground potential rise will also change. Based on this characteristic, this article discusses how to suppress transient ground potential rise in GIS.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132932571","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}
{"title":"Integration of Energy Storage System with Renewable Energy Source","authors":"Dr. Srikanth Narasimalu, Brindha Chelliah","doi":"10.1109/ACEPT.2018.8610661","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610661","url":null,"abstract":"This Paper presents the analytical study of different configurations in integrating the energy storage system with wind turbines. The purpose of this study is to design a storage system that is capable to bring out a sustainable energy system which is reliable and is controllable such that they can be integrated into power system without causing performance degradation of the system or requiring additional flexibility. As an initiative this research, study and analyze the concepts of lead acid battery energy storage system (BESS) and establish a compressed air energy storage (CAES) facility, with a specific focus on renewable integration. The system is designed in a specific way to capture excess power prior to electricity generation so that the electrical components can be downsized for demand instead of supply. The study quantifies and demonstrate, the hybrid energy storage system. It integrates battery storage to have the capability of fast charging/discharging while compressed air energy storage as tool to reduce the intermittency in the power delivery. The research facilitated the study of integration of several renewable energy source and have a better understanding of the effectiveness of energy storage system (ESS) to support grid applications. Also, the study of concatenation of multiple energy storage system and their benefits in bringing up the steady power supply eliminating the intermittency in the power generation.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117151400","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}
{"title":"IEC 61850 – An Approach to Facilitate Interoperability in Distribution Automation","authors":"Shiong Ghee Low, X. Liang, Shu-Jie Simeon Tan","doi":"10.1109/ACEPT.2018.8610748","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610748","url":null,"abstract":"Distribution Automation (DA), one of the key enablers to achieve Smart Grid, is rapidly gaining popularity among power utilities globally. This paper describes an example of a protection application scheme and elaborates on how the IEC 61850 application profile can be defined to ensure interoperability based on a Distribution Automation (DA) application.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116402163","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}