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2019 54th International Universities Power Engineering Conference (UPEC)最新文献

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Medium Voltage to Low Voltage Load Flow Algorithm for Unbalanced Islanded Microgrids 不平衡孤岛微电网的中低压负荷流算法
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893626
Evangelos E. Pompodakis, G. Kryonidis, M. Alexiadis
{"title":"Medium Voltage to Low Voltage Load Flow Algorithm for Unbalanced Islanded Microgrids","authors":"Evangelos E. Pompodakis, G. Kryonidis, M. Alexiadis","doi":"10.1109/UPEC.2019.8893626","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893626","url":null,"abstract":"In this paper, a load flow algorithm for unbalanced islanded Microgrids (MGs) is developed considering both the multigrounded low voltage (LV) and the medium voltage (MV) network. The method is based on the implicit ZBUS load flow method and it can be applied even in highly meshed MGs regardless of the R/X ratio of lines. It presents fast convergence, low computation time and high robustness. In our analysis we consider a variety of transformer configurations and step voltage regulators. Simulations were conducted in IEEE 4-nodes, 6-nodes and in a highly meshed network of 749 MV and LV nodes.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"68 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74465328","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
Quality Check during Manufacturing of Custom Photovoltaic Modules with Back-Contact Cells 定制后接触电池光伏组件生产过程中的质量检查
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893478
A. Ciocia, Gabriele Malgaroli, A. Spedicato, F. Spertino, H. Andrei, V. Boicea
{"title":"Quality Check during Manufacturing of Custom Photovoltaic Modules with Back-Contact Cells","authors":"A. Ciocia, Gabriele Malgaroli, A. Spedicato, F. Spertino, H. Andrei, V. Boicea","doi":"10.1109/UPEC.2019.8893478","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893478","url":null,"abstract":"The Electroluminescence (EL) analysis and the current-voltage (I-V) curves determination of PhotoVoltaic (PV) generators are the most used diagnosis methods to check the presence of defects. In the present work, these tests are applied to Interdigitated Back Contact (IBC) PV modules with customizable shape after their manufacturing. A defect is detected in a large number of modules, suggesting an issue related to the semi-automatic manufacturing procedure. Therefore, a detailed analysis is carried out to localize the cause of the defect and a preventive action is proposed in order to reduce the occurrence frequency of the defect during manufacturing.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"6 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75829166","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
Assessing the frequency support provided by DFIG wind turbines according to current standards 根据现行标准对DFIG风机提供的频率支持进行评估
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893481
F. Bignucolo, A. Cervi, M. Coppo, Riccardo Stecca
{"title":"Assessing the frequency support provided by DFIG wind turbines according to current standards","authors":"F. Bignucolo, A. Cervi, M. Coppo, Riccardo Stecca","doi":"10.1109/UPEC.2019.8893481","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893481","url":null,"abstract":"Nowadays, wind turbines commonly installed in new plants include a power converter. This allows these generators to operate in a variable speed range with the aim of maximizing the primary source exploitation. On the other hand, the presence of a converter implies a partial decoupling from the grid. Several studies have been carried out to enhance the ability of wind turbines in supporting frequency stability in the case of network events, and some grid codes recently include these regulating functions as required specifications. This work presents a novel control system applied to a Doubly Fed Induction Generator to make it compliant with present Italian standards. In order to characterize the role of wind turbines in supporting network frequency, several simulations have been carried out in the DIgSILENT PowerFactory environment. Main advantages and disadvantages are identified and discussed, depending on both the wind turbine operating conditions and the characteristics of the required stabilizing contribution.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"195 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78993411","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
Solar Photovoltaic based Brushless DC Motor Driven Water Pumping System using PSO-MPPT Algorithm 基于PSO-MPPT算法的太阳能光伏无刷直流电机驱动水泵系统
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893591
Kartikesh Kumar Jha, Md. Nishat Anwar
{"title":"Solar Photovoltaic based Brushless DC Motor Driven Water Pumping System using PSO-MPPT Algorithm","authors":"Kartikesh Kumar Jha, Md. Nishat Anwar","doi":"10.1109/UPEC.2019.8893591","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893591","url":null,"abstract":"In this paper, analysis of Solar Photovoltaic (SPV) powered brushless dc motor driving water pumping system is presented. The power-voltage (P-V) wcurve of SPV array contains a large number of local maximum power points (MPPs) and one global point (GP). To find the global point of maximum power, a particle swarm optimization (PSO) technique is used. PSO based MPPT technique has proven better performance in contrast with the conventional P&O for the BLDC motor-water pump. A dynamic and steady-state examination of BLDC motor with Cuk converter has been carried out. The simulation in MATLAB/SIMULINK shows the faster tracking speed with PSO based MPPT technique in comparison with P and O. In addition to this oscillation at the operating point of maximum power is observed to be less. The hardware results will be available at the final version of this manuscript.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"46 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83744025","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: 5
On-line Transient Stability Detection Using Intelligent Systems with Energy Functions Based Inputs 基于能量函数输入的智能系统在线暂态稳定检测
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893640
Hamid Reza Shabani, M. Kalantar
{"title":"On-line Transient Stability Detection Using Intelligent Systems with Energy Functions Based Inputs","authors":"Hamid Reza Shabani, M. Kalantar","doi":"10.1109/UPEC.2019.8893640","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893640","url":null,"abstract":"In this paper, for on-line Transient Stability Assessment (TSA), two sets of intelligent units are used. Set 1 consists of one intelligent unit which estimates Critical Clearing Time (CCT) for each contingency. The inputs of this unit are maximum potential energy, minimum kinetic energy and the slope of minimum kinetic energy. To determine these inputs, 0.5 to 0.7 seconds of the system response has to be simulated. To estimate CCT more quickly, the inputs of the intelligent unit in Set 1 are estimated using three other intelligent units (Set 2). At first, the inputs of intelligent units in Set 2 are selected from both measurable and non-measurable variables. Simulation results show that in this case CCT is determined through simulating only 0.05 seconds of the system response. This indicates the suitability of the proposed method for on-line pre- disturbance TSA.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"255 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73304598","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
Compensation Method For DC PD Measurements In The High Frequency Range 高频范围直流PD测量的补偿方法
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893595
D. Wienold, F. Jenau
{"title":"Compensation Method For DC PD Measurements In The High Frequency Range","authors":"D. Wienold, F. Jenau","doi":"10.1109/UPEC.2019.8893595","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893595","url":null,"abstract":"Partial discharge diagnosis is an irreplaceable and commonly used procedure for condition assessment and error location especially in AC high voltage equipment. The development of efficient high voltage direct current transmission systems requires an alternative approach in partial discharge diagnosis compared to the phase resolved pattern used in AC application. The detection and evaluation of the electromagnetic field emitted by a partial discharge event provides this alternative to conventional approaches, as the electromagnetic field contains characteristic information regarding the type of fault. The partial discharge causes a transient current in the connected high voltage structures, and therefore the emission of a high frequency electromagnetic field by this structure is assumed. Considering this as the transmitting antenna, the radiation characteristic depends on the geometric dimensions and build of the high voltage circuit. Further influencing factors can be metallic structures which cause a deviation from an ideal open-area surrounding. In order to provide physically plausible and comparable results, which are necessary for a partial discharge diagnosis, the transmission path between the high voltage circuit and the receiving antenna is characterised within this publication. Furthermore, a method for data post processing and compensation of these influences is presented and evaluated.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"14 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81584955","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
Smart grid integration of IoT 智能电网与物联网的融合
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893551
Andrei Cornel - Cristian, Tudor Gabriel, Mădălina Călin-Arhip, Alexandru Zamfirescu
{"title":"Smart grid integration of IoT","authors":"Andrei Cornel - Cristian, Tudor Gabriel, Mădălina Călin-Arhip, Alexandru Zamfirescu","doi":"10.1109/UPEC.2019.8893551","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893551","url":null,"abstract":"With the development and introduction of intelligent electronic devices within the classical electrical grids and their transformation into smart grids, emerged the need for extracting and processing the data from those devices in real time or near real time. In addition to information extraction, it is necessary for field devices to be able to communicate with each other as well as with a central command point. By integrating internet of thing (IoT) within smart grids communication between devices that normally were not designed to exchange information becomes possible, information that can be accessed from anywhere with Internet access. This paper will explore the benefits brought by IoT application to the smart grid.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"22 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81700134","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: 2
Big Data Analysis with Key Performance Indicators for Reactive Power Balance and Associated Voltage Quality Visual Mapping in the North-Western Part of the Danish Grid 丹麦西北部电网无功平衡关键性能指标的大数据分析及相关电压质量可视化映射
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893554
Simon Højstrup Aggs, Peter Jan Randewijk, B. Knutz, Anders Steen Kristensen
{"title":"Big Data Analysis with Key Performance Indicators for Reactive Power Balance and Associated Voltage Quality Visual Mapping in the North-Western Part of the Danish Grid","authors":"Simon Højstrup Aggs, Peter Jan Randewijk, B. Knutz, Anders Steen Kristensen","doi":"10.1109/UPEC.2019.8893554","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893554","url":null,"abstract":"This paper will explain how steady state voltage quality in a power system (in terms of voltage limits) is affected when overhead transmission lines are converted to underground cables. Furthermore, it will be showed how the voltage quality can be analysed from Big Data (SCADA) measurements using Key Performance Indicators (KPIs).Overhead lines and underground cables act very differently due to the difference in their reactive properties. The reason behind this will be briefly explained. A PowerFactory simulation showing the issues of reactive power transport with, and without, the necessary compensation equipment, will also be shown. Operation of synchronous machines and transformers are severely affected by over-voltages and this will compromise the security of supply if voltages are not maintained within limits. To highlight the consequences, Key Performance Indicators (KPIs) are used to score the quality based on voltage magnitude and the operation of local compensation units. The developed KPIs are then applied to real-world data from the northwest part of Denmark to prove the negative impact on voltage quality.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"33 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87032593","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
Energy Price Prediction on the Romanian Market using Long Short-Term Memory Networks 利用长短期记忆网络对罗马尼亚市场进行能源价格预测
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893550
Andrei Ioaneş, R. Tirnovan
{"title":"Energy Price Prediction on the Romanian Market using Long Short-Term Memory Networks","authors":"Andrei Ioaneş, R. Tirnovan","doi":"10.1109/UPEC.2019.8893550","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893550","url":null,"abstract":"Transition to a market-based economy has reached, eventually, the production of electrical energy in Romania. Historically considered a never-ending resource, the producers did not have to interact with the consumer and more specific with the demands of the consumers. This paper proposes a neural algorithm based on Long Short-Term Memory (LSTM) architecture able to assess the price of energy as a time sequence application and predict trends based on the interaction between resources availability and demand.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"2011 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86325510","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: 4
Numerical Simulation for Switching Noise due to a Power Converter for DC Feeding System 直流馈电系统电源变换器开关噪声的数值模拟
2019 54th International Universities Power Engineering Conference (UPEC) Pub Date : 2019-09-01 DOI: 10.1109/UPEC.2019.8893475
Hiroaki Okabe, Hiroki Tanaka, N. Nagaoka
{"title":"Numerical Simulation for Switching Noise due to a Power Converter for DC Feeding System","authors":"Hiroaki Okabe, Hiroki Tanaka, N. Nagaoka","doi":"10.1109/UPEC.2019.8893475","DOIUrl":"https://doi.org/10.1109/UPEC.2019.8893475","url":null,"abstract":"This paper investigates noise characteristics injected into a feeding circuit of DC traction system caused by a power converter. First, a simulation accuracy is confirmed by a scaled-down model of the power converter. Second, currents flowing into rails are analyzed by appending an equivalent circuit of the DC feeding system to the numerical converter model. Parameters of the LC filter inserted between the converter and the feeding circuit are determined by using the frequency characteristics of the currents. The noise distributes according to the current dividing ratio determined by the impedances of the feeder and the filter circuits. The proposed simulation is useful for investigating the interference from the currents before the installation of the power converter. In addition, this method can reduce the cost at the system design, which has been carried out by practical experiments on the railway system.","PeriodicalId":6670,"journal":{"name":"2019 54th International Universities Power Engineering Conference (UPEC)","volume":"53 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2019-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87477897","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
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