Binjie Liao, Jianwei Mao, Liang Li, Bo Li, Jun Yang, F. Wen, Md. Abdus Salam
{"title":"A planning model for charging facilities of electric vehicles considering spatial and temporal characteristics of charging demands","authors":"Binjie Liao, Jianwei Mao, Liang Li, Bo Li, Jun Yang, F. Wen, Md. Abdus Salam","doi":"10.1109/SPEC.2016.7846114","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846114","url":null,"abstract":"Appropriate planning of charging facilities is of significant importance for the development of electric vehicles (EVs). Given this background, a planning model for siting and sizing of EV charging facilities based on zonal charging demand index is proposed with spatial and temporal characteristics of charging demands considered. A charging load prediction model based on the analysis of charging behaviors is first presented. The demands of different charging facilities are subsequently calculated with the inputs of daily energy charging demands and the maximum plug-in number of EVs. Then, the planning region is divided into several disjointed geographical zones, and the charging demand index in each zone determined. Those zones with higher charging demand indices are selected as the candidates for allocating charging facilities. Finally, the planning scenario of EV charging facilities in 2020 in Hangzhou City of China is employed to illustrate the essential features of the developed model.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"142 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124503130","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":"Integrated magnetics for power density improvement of differential rectifiers and inverters","authors":"Minxin Wu, Sinan Li, Siew-Chong Tan, S. Hui","doi":"10.1109/SPEC.2016.7846008","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846008","url":null,"abstract":"In this paper, a type of low-frequency integrated AC inductor with zero inductance coupling is proposed for differential rectifiers/inverters. The objective is to increase the power density of these converters by replacing their two bulky low-frequency AC inductors with the proposed integrated AC inductor, which is much more compact. The principles of magnetic integration and the optimization procedures are explained in detail. Experimental results show that a core volume reduction of 20.4% is achievable using the proposed integrated magnetics.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"2004 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125616347","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}
Binjie Liao, Liang Li, Bo Li, Jianwei Mao, Jun Yang, F. Wen, Md. Abdus Salam
{"title":"Load modeling for electric taxi battery charging and swapping stations: Comparison studies","authors":"Binjie Liao, Liang Li, Bo Li, Jianwei Mao, Jun Yang, F. Wen, Md. Abdus Salam","doi":"10.1109/SPEC.2016.7846135","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846135","url":null,"abstract":"With the development of electric vehicles (EVs), the existing power system concerned will be challenged from several aspects due to the spatial and temporal stochastic distribution of the EV charging load. Given this background, a model for simulating the charging load of electric taxis under fast charging mode and battery swapping mode considering the passenger trip characteristics, stochastic driving patterns and charging behaviors is developed in this paper. First, the concept of traffic zone of the gridded road map as well as seeking, traveling and charging route of EVs is introduced. Then, Monte Carlo simulations of EV driving patterns and charging behaviors are carried out considering typical passenger trip characteristics and the impacts of different charging operation modes. Finally, a comparative case study of the EV charging load in Hangzhou City of China is carried out to illustrate the essential features of the proposed model. The impacts of different charging operation modes on the spatial and temporal distribution of EV charging load are also addressed.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127917197","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}
Fangchen Huang, Jing Hui, Wenzhou Lu, Wenxu Yan, Lei Wu
{"title":"Microgrid energy coordination control of distributed power supply based on hybrid energy storage","authors":"Fangchen Huang, Jing Hui, Wenzhou Lu, Wenxu Yan, Lei Wu","doi":"10.1109/SPEC.2016.7846095","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846095","url":null,"abstract":"Aiming at the problem of load power fluctuation in the stable microgrid operation, this paper proposes a real-time power regulation scheme based on the Fast Fourier Transfer (FFT) algorithm. By FFT algorithm, load power is processed into two components of high frequency (HF) and low frequency (LF), which are absorbed to supercapacitor and battery banks, respectively. At the same time, for purpose of realizing the effective smooth switching between operation modes, the consolidate control strategy for inverter is adopted in this paper. Simulation results indicate that processing effect of FFT on the load power fluctuation is better than that of LPF (low pass filter) on it, and the power quality is improved. With the unified control strategy imposed on inverter, system can operate well and transform smoothly between grid-connected and standalone mode which needn't foresee the operation condition.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130237040","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}
Pablo Silva, J. Muñoz, Rodrigo Aliaga, Patricio Gaisse, C. Restrepo, Mario Fernández
{"title":"On the DC/DC converters for cascaded asymmetric multilevel inverters aimed to inject photovoltaic energy into microgrids","authors":"Pablo Silva, J. Muñoz, Rodrigo Aliaga, Patricio Gaisse, C. Restrepo, Mario Fernández","doi":"10.1109/SPEC.2016.7846160","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846160","url":null,"abstract":"This work presents a double stage DC/DC converter suitable for cascaded asymmetric multilevel inverters meant to inject photovoltaic energy to microgrids. For cascaded topologies, maintain the DC voltage within its expected value is crucial to obtain satisfactory performance; on the other hand, in photovoltaics, a DC/DC converter is usually included to ensure the maximum power point. For asymmetric structures, the gating patterns are fixed and therefore an additional degree of freedom is required to simultaneously keep the requested ratio and track the maximum power of the solar array. A suitable double stage buck-boost converter is used in the asymmetric inverter in order to perform both tasks; which includes a Perturb and Observe algorithm and a fuzzy logic controller for each stage, respectively. The simulated results shows a satisfactory performance of the proposed scheme.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"348 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134004133","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 class of parallel operated impedance source inverters","authors":"Zeeshan Aleem, M. Hanif","doi":"10.1109/SPEC.2016.7846026","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846026","url":null,"abstract":"Realization of high power conversion system utilizing parallel connected power converters rated at much smaller power levels due to limitations in switching device voltage and current ratings would be highly desirable. Therefore, modular configured converters are imminent in high power industrial applications due to their numerous benefits over singular high capacity converter or inverter. They can be realized with reduced component stress by sharing the currents, ease of maintenance, modularity facilitating plug and play, higher reliability, and (N+1) redundancy. This papers presents a family of parallel connected Z-source inverters (ZSIs). This new class retains all the existing features of ZSIs with the added benefits of parallel connected inverters. Moreover, higher voltage gains and reduced ripples via interleaving are achieved with parallel configurations. A couple of parallel connected ZSIs are discussed in detail with theoretical analysis accompanied with simulation results for the verification purposes.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129381194","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}
M. Jarnut, G. Benysek, Szymon Werminski, Bartosz Waskowicz
{"title":"Experimental investigation on properties of small-scalle flow battery","authors":"M. Jarnut, G. Benysek, Szymon Werminski, Bartosz Waskowicz","doi":"10.1109/SPEC.2016.7846081","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846081","url":null,"abstract":"Small, distributed energy storage (ES) devices could be used to increase self-consumption of generated energy inside building-integrated microgrids, helping to flatten the load curve of the electrical power system (EPS). ES are especially desired in systems where rising penetration of intermittent renewable energy sources (RES) with its variable nature has become a challenge for distribution grid operators to maintain voltage quality inside the permissible range. Increasingly, it requires the involvement of new distributed resources, such as energy storage devices to smooth power fluctuations of RES and to avoid long-term voltage rises. To achieve the best results such devices should be located as close to the micro source as possible — very often in residential areas. This in turn requires meeting many restrictions such as limited space, high level of safety and low energy storage costs. This paper discusses the properties of small Zinc Bromine (ZnBr) flow batteries ascertained in experimental research. The simple equivalent model of the ZnBr battery has also been developed and described.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133180541","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}
Long Cheng, P. Acuña, R. Aguilera, M. Ciobotaru, Jiuchun Jiang
{"title":"Model predictive control for DC-DC boost converters with constant switching frequency","authors":"Long Cheng, P. Acuña, R. Aguilera, M. Ciobotaru, Jiuchun Jiang","doi":"10.1109/SPEC.2016.7846189","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846189","url":null,"abstract":"Boost converters are widely used in several applications such as solar PV systems, energy storage systems, etc. In order to improve its dynamic performance, several model predictive control (MPC) strategies have been proposed to govern this DC-DC converter. However, in general, they require long prediction horizons to achieve a stable closed-loop due to its well-known non-minimum phase behavior. A simple but effective MPC strategy for DC-DC boost converters is proposed in this work. The advantage of this proposal is that it requires only one-step prediction horizon to govern the converter. Moreover, the proposed controller belongs to the continuous control set MPC (CCS-MPC) family, which provides a constant switching frequency.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134624617","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}
D. Molligoda, P. Chatterjee, C. Gajanayake, A. Gupta, K. Tseng
{"title":"Review of design and challenges of DC SSPC in more electric aircraft","authors":"D. Molligoda, P. Chatterjee, C. Gajanayake, A. Gupta, K. Tseng","doi":"10.1109/SPEC.2016.7846117","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846117","url":null,"abstract":"Solid State Power Controller (SSPC) is gaining popularity, replacing mechanical switches and circuit breakers, in niche markets like electrical power distribution systems of the more electric aircraft. Significant amount of research is being conducted to develop high power SSPCs to cater the dynamic, distributed load management. The 28V SSPCs are widely used for protection and control of the secondary distribution system. Although there are high current SSPCs for low bus voltages, the 270V SSPCs are not mature and high current 270V SSPCs are not available in the market or having limited capability, which would be used in the primary power distribution system of the aircraft. This paper presents the market availability, design challenges the design engineer should be aware of and various approaches adopted to design and develop a high current 270V DC SSPC for more electric aircraft system, its key features which may not have been available in the traditional switches and future trends.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"191 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124225825","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}
Yayun Dong, Wenwen Li, Xijun Yang, D. Ma, Houjun Tang
{"title":"Shifting slabs: Enhancement of magnetic coupling in a wireless power transfer system","authors":"Yayun Dong, Wenwen Li, Xijun Yang, D. Ma, Houjun Tang","doi":"10.1109/SPEC.2016.7846028","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846028","url":null,"abstract":"Shifting medium is a kind of metamaterial, which can optically shift a space or an object a certain distance from the original place. In this paper, two shifting slabs covering the transmitting coil are proposed based on the concept of shifting medium to enhance the magnetic coupling of a two-coil wireless power transfer system. The electromagnetic parameters of the shifting slabs are calculated by transformation optics. Numerical simulations are performed to validate that the shifting slabs could approximately shift the transmitting coil; thus, the mutual magnetic coupling between the two coils is enhanced.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114915287","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}