2020 9th International Conference on Renewable Energy Research and Application (ICRERA)最新文献

Effect of Electric Vehicle Chargers on the Harmonic Levels of a UK LV Electricity Distribution Network under Steady-State Cable Faults 稳态电缆故障下电动汽车充电器对英国低压配电网谐波水平的影响

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242718

G. Gissing, J. Yang, N. Fahmi

{"title":"Effect of Electric Vehicle Chargers on the Harmonic Levels of a UK LV Electricity Distribution Network under Steady-State Cable Faults","authors":"G. Gissing, J. Yang, N. Fahmi","doi":"10.1109/ICRERA49962.2020.9242718","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242718","url":null,"abstract":"Despite the National Grid expecting the number of electric vehicles (EVs) on UK roads to increase to 35 million by 2050 (2019 data), the effect of electric vehicle chargers (EVCs) together with steady-state cable faults on the total harmonic distortion of the LV electricity distribution network (EDN) has not been considered. Therefore, the purpose of this paper is to investigate the effect that increased numbers of EVCs have on the steady-state voltage total harmonic distortion (THDv) of a UK LV EDN under steady-state cable fault arrangements. Using MATLAB simulations, the study analysed the steady-state THDv of a UK suburban residential LV EDN with increased numbers of EVCs under phase-to-phase and open-circuit network conditions. It was found that on the LV EDN studied, phase-to-phase conditions can increase the THDv of the network significantly. Under the test conditions, the LV EDN was found to no longer comply with the Engineering Recommendation G5/4-1. This paper recommends that the number of EVCs connected to LV EDNs should be restricted, or harmonic reducing technology implemented to observe compliance with the G5/4-1. Further analysis should be carried out to verify the simulation and to determine whether the harmonics observed have a noticeable effect on equipment connected to a residential network.","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123794385","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

LSTM Forecasts for Smart Home Electricity Usage LSTM智能家居用电量预测

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242804

Rosemary E. Alden, Huangjie Gong, Cristinel Ababei, D. Ionel

{"title":"LSTM Forecasts for Smart Home Electricity Usage","authors":"Rosemary E. Alden, Huangjie Gong, Cristinel Ababei, D. Ionel","doi":"10.1109/ICRERA49962.2020.9242804","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242804","url":null,"abstract":"With increasing of distributed energy resources deployment behind-the-meter and of the power system levels, more attention is being placed on electric load and generation forecasting or prediction for individual residences. While prediction with machine learning based approaches of aggregated power load, at the substation or community levels, has been relatively successful, the problem of prediction of power of individual houses remains a largely open problem. This problem is harder due to the increased variability and uncertainty in user consumption behavior, which make individual residence power traces be more erratic and less predictable. In this paper, we present an investigation of the effectiveness of long short-term memory (LSTM) models to predict individual house power. The investigation looks at hourly (24 h, 6 h, 1 h) and daily (7 days, 1 day) prediction horizons for four different recent datasets. We find that while LSTM models can potentially offer good prediction accuracy for 7 and 1 days ahead for some data sets, these models fail to provide satisfactory prediction accuracies for individual 24 h, 6 h, 1 h horizons.","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122622796","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: 14

Comparison of Different Battery Balancing Methods for use with Second Life Batteries 二次寿命电池不同平衡方法的比较

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242912

Jingxia Yang, D. Strickland, M. Abedi-Varnosfaderani

{"title":"Comparison of Different Battery Balancing Methods for use with Second Life Batteries","authors":"Jingxia Yang, D. Strickland, M. Abedi-Varnosfaderani","doi":"10.1109/ICRERA49962.2020.9242912","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242912","url":null,"abstract":"Second life batteries are batteries that have previously been used in hybrid or electric vehicles, but have dropped below 80% of their original capacity. It is possible to re-purpose these batteries for second life applications, for example, small domestic units to store excess solar power. However, the process of sorting the batteries, so that similar batteries can be used together, is onerous. The main reason for having similar batteries together is that most applications rely on series strings of batteries to get a suitable voltage, and as such the string capacity is limited by the weakest battery. This paper looks at how effective different active battery balancing techniques are at balancing dissimilar battery cells in series to see if this can be used as mitigation against sorting. The paper shows that while battery balancing can be used, the time taken to balance the batteries while keeping within the current limits is long and that the full battery pack capacity is unlikely to be realised. For the majority of types of battery balancing circuit using balancing as mitigation against battery sorting is not feasible.","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"10 41","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113954624","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

AC Distribution System with Small Photovoltaic Cells for the Windows of Buildings 建筑窗户用小型光伏电池交流配电系统

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242741

Zhang Zheng, A. Nakajima, S. Masukawa

引用次数: 2

Adaptive Gain-Regulating-based Control of Parallel-Connected Γ-Z-Source Power Converters in Hybrid Microgrids 混合微电网并联Γ-Z-Source功率变流器自适应增益调节控制

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242898

M. Zolfaghari, V. Nurmanova, M. Bagheri, G. Gharehpetian

引用次数: 6

Degradation Diagnosis Estimating Internal Resistance for Digital Control DC-DC Converter 数字控制DC-DC变换器的退化诊断及内阻估计

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242838

Y. Furukawa, K. Kajiwara, F. Kurokawa, Y. Nakashima, N. Matsui

引用次数: 0

Performance Evaluation of Four Grid-Forming Control Techniques with Soft Black-Start Capabilities 四种具有软黑启动能力的成形网格控制技术的性能评价

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242758

Abdulrahman Alassi, K. Ahmed, A. Egea-Àlvarez, O. Ellabban

{"title":"Performance Evaluation of Four Grid-Forming Control Techniques with Soft Black-Start Capabilities","authors":"Abdulrahman Alassi, K. Ahmed, A. Egea-Àlvarez, O. Ellabban","doi":"10.1109/ICRERA49962.2020.9242758","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242758","url":null,"abstract":"Grid-Forming Converters (GFC) can be controlled as independent, self-starting, voltage sources. This feature is essential for power converters to achieve successful black-start sequence initiation. Conventional grid-following converters are not capable of self-starting an islanded network. GFC control thus exploits wider grid support and network restart potential. This study analyzes and compares four GFC controllers to assess their generic and soft black-start (ramping voltage) capabilities. The compared techniques are: Droop Control, Power Synchronizing Control (PSC), Virtual Synchronous Machine (VSM), and Matching control. These techniques are selected based on their direct voltage reference control flexibility. Various simulations are performed with common parameters to assess the response of each technique under similar conditions against load, DC voltage and active power reference disturbances, in addition to their soft-start readiness. The results demonstrate the high-level compatibility of these four controllers with soft black-start through successful and timely ramping voltage reference tracking. Moreover, the four considered control techniques achieve satisfactory performance, with VSM demonstrating more flexibility due to its tunable virtual inertia parameter (J).","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114956502","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: 12

Targets of Countries in Renewable Energy 各国可再生能源目标

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242765

Faten Ayadi, I. Colak, Ilhan Garip, H. Bulbul

引用次数: 15

A Low Power Photovoltaic Water Pumping System based on a DC-DC Step-up Converter and Standard Frequency Converters 基于DC-DC升压变换器和标准变频器的小功率光伏水泵系统

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242833

Alice Nogueira Fey, V. Leite, Eduardo Félix Ribeiro Romaneli

{"title":"A Low Power Photovoltaic Water Pumping System based on a DC-DC Step-up Converter and Standard Frequency Converters","authors":"Alice Nogueira Fey, V. Leite, Eduardo Félix Ribeiro Romaneli","doi":"10.1109/ICRERA49962.2020.9242833","DOIUrl":"https://doi.org/10.1109/ICRERA49962.2020.9242833","url":null,"abstract":"Photovoltaic Water Pumping Systems (PVWPS) are a solution to supply water to populations living in arid and remote regions. One problem is that these systems are usually sold as closed kits and with solar energy dedicated equipment. This situation makes it difficult to replace damaged equipment for others that would be available on the market. Also, solar dedicated equipment are more expensive than the general-purpose ones. Another issue is the oversizing of the photovoltaic string in terms of power, when installing low power PVWPS that employ conventional AC water pumps. The oversizing occurs in order to achieve the voltage requirements of these pumps (rated with less than 1kW). In the interest of solving these problems, this work proposes a solution for a low power PVWPS. The proposed system employs a maximum of 4 photovoltaic modules; a DC-DC step-up converter; a standard frequency converter and an 1HP AC water pump. It was designed and tested a 750W DC-DC step-up converter with a static gain of 3.44 for composing the proposed solution. The whole set of the low power PVWPS was tested in a laboratory environment and showed a full day of operation. The present work was held in cooperation with the company VALLED.","PeriodicalId":129367,"journal":{"name":"2020 9th International Conference on Renewable Energy Research and Application (ICRERA)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126424909","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

A New Dynamic WPT Driven Capacitor Scooter System 一种新型动态WPT驱动电容踏板车系统

2020 9th International Conference on Renewable Energy Research and Application (ICRERA) Pub Date : 2020-09-27 DOI: 10.1109/ICRERA49962.2020.9242907

Ryota Miyao, H. Omori, T. Morizane, Hidehito Matayoshi

引用次数: 0