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Centrally Managed Storage Facilities in Small Non-Interconnected Island Systems 小型非互联岛系统的集中管理存储设施
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8542102
G. N. Psarros, Spiros P. Kokkolios, S. Papathanassiou
{"title":"Centrally Managed Storage Facilities in Small Non-Interconnected Island Systems","authors":"G. N. Psarros, Spiros P. Kokkolios, S. Papathanassiou","doi":"10.1109/UPEC.2018.8542102","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8542102","url":null,"abstract":"In this paper the operation of small isolated island grids is investigated with the presence of centrally managed battery energy storage (BES) facilities. A mixed integer linear programming (MILP) unit commitment and economic dispatch (UC-ED) method is utilized to evaluate the impact from the introduction of BES on system operation. Two small non-interconnected island (NII) power systems with diversified characteristics are examined under high renewable energy source (RES) penetration conditions and the anticipated benefits for the system from the presence of storage are quantified in terms of security, economics and achievable renewable energy penetration levels in each case.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134452269","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
Power Transformer Noise Analysis based on All-phase FFT and Filtering Technique 基于全相位FFT和滤波技术的电力变压器噪声分析
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8542055
Xiaojuan Zhao, Yaqi Zhou, Xiaorong Zhao, Xiaojun Zhu, Zhu Zhu, Haoreng Dai, Hongsheng Shi
{"title":"Power Transformer Noise Analysis based on All-phase FFT and Filtering Technique","authors":"Xiaojuan Zhao, Yaqi Zhou, Xiaorong Zhao, Xiaojun Zhu, Zhu Zhu, Haoreng Dai, Hongsheng Shi","doi":"10.1109/UPEC.2018.8542055","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8542055","url":null,"abstract":"Analyses of frequency domain characteristics of transformer noises are beneficial for the research of active noise control technology in substations. In this paper, all-phase FFT spectrum analysis is used to study the collected transformer noise signals. As shown in the frequency spectrograms, the fundamental frequency of the noise signals is 100Hz; the noise signals reach their peaks in 100Hz and 200Hz. A comparison of all-phase filtering and traditional segment filtering techniques is also conducted in this paper to extract the fundamental frequency components of the noise signals. It has shown that all-phase filtering can ensure phase linearity. Frequency leakages and latency can also be improved due to its continuous nature. Finally It is concluded that frequency domain characteristics can be better analyzed and extracted by applying all-phase FFT spectrum analysis and all-phase filtering techniques to the active noise control of transformers.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134285402","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
Optimal Operation of Multi-Terminal Soft Open Point to Increase Hosting Capacity of Distributed Generation in Medium Voltage Networks 中压电网多端软开点优化运行提高分布式发电承载能力
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541861
M. Abdelrahman, C. Long, Jianzhong Wu, N. Jenkins
{"title":"Optimal Operation of Multi-Terminal Soft Open Point to Increase Hosting Capacity of Distributed Generation in Medium Voltage Networks","authors":"M. Abdelrahman, C. Long, Jianzhong Wu, N. Jenkins","doi":"10.1109/UPEC.2018.8541861","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541861","url":null,"abstract":"A multi-terminal soft open point (MT-SOP) is a power electronic device, using multiple (3 or more) voltage source converters (VSCs) connected to a common DC busbar and multiple feeders, installed at previously normally open points in distribution networks. Due to its capability of accurate control of power flow, MT-SOPs are able to mitigate voltage and thermal constraints in medium voltage (MV) networks with high penetrations of distributed generators (DGs). The operating set-points were determined using a non-linear programming (NLP) optimization and a Jacobian matrix-based sensitivity analysis. The methodology was demonstrated on an 11 kV test network. Results showed that a three-terminal SOP reduces the network energy losses and enables the distribution network to host a further 20% of DG compared to a two-terminal SOP.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115538698","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: 8
Modelling and simulation of electrical phenomena in a real time test bench 实时试验台电现象的建模与仿真
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8542092
Stephan Ruhe, S. Nicolai, P. Bretschneider
{"title":"Modelling and simulation of electrical phenomena in a real time test bench","authors":"Stephan Ruhe, S. Nicolai, P. Bretschneider","doi":"10.1109/UPEC.2018.8542092","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8542092","url":null,"abstract":"The energy transition main targets are increase of energy efficiency and promotion of renewable technologies, hence the number of components with power electronics is growing in the electrical system. The research project VEREDELE examines these effects and resulting interactions in order to identify possible challenges and develop suitable solutions. Especially active components, such as electric vehicles, pose major challenges for the modelling and simulation of these devices. The Power-Hardware-in-the-Loop (PHIL) test bed that built up is a solution to this problem and allows the integration of real devices (loads and feeds) into a grid simulation. A model library developed for system tests, which makes it possible to generate any system states to monitor the real behaviour of the equipment and to conclude on potential critical grid states. Furthermore, the characteristics of the signal source of the simulation system examined in this paper and an evaluation of the usability of the system for the intended investigations is given.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"19 5","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120867753","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
A Novel Calculation Method for Steady-State Short-Circuit Currents in Meshed DC-Grids 一种新的网格直流电网稳态短路电流计算方法
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541996
A. Saçiak, G. Balzer, J. Hanson
{"title":"A Novel Calculation Method for Steady-State Short-Circuit Currents in Meshed DC-Grids","authors":"A. Saçiak, G. Balzer, J. Hanson","doi":"10.1109/UPEC.2018.8541996","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541996","url":null,"abstract":"DC grids can be found at different levels of the energy system, from DC railway networks to HVDC grids. However, there is currently no standard for calculating the short-circuit currents in meshed DC-grids. This paper proposes a calculation method for steady-state short-circuit currents for DC-grids with arbitrary topology. These grids are fed by converters, which behave like an uncontrolled six-pulse bridge rectifier in case of a short-circuit. Due to different number of diodes conducting simultaneously, these converters exhibit a nonlinear behaviour. The proposed calculation method uses a piecewise linear VI-characteristic to describe the nonlinear converter behaviour with different linear Thévenin equivalents. Thus, the nonlinear network is reduced to a linear network, which minimises computational cost. An iterative algorithm is used to determine the correct Thévenin equivalent for each converter. The accuracy of the proposed calculation method is demonstrated relative to detailed simulations in PSCAD.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123917672","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: 6
Industrial Energy Efficiency Optimisation Through Cogeneration Using Biomass 利用生物质热电联产优化工业能源效率
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541857
Muhammad Tahir Hassan, S. Burek, M. Farrag
{"title":"Industrial Energy Efficiency Optimisation Through Cogeneration Using Biomass","authors":"Muhammad Tahir Hassan, S. Burek, M. Farrag","doi":"10.1109/UPEC.2018.8541857","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541857","url":null,"abstract":"Combined heat and power (CHP) is considered one of the most appropriate and promising technologies for the improvement of industrial energy efficiency. This study is a feasibility analysis of the application of various cogeneration systems using biofuel (rice husk) based on Rankine, Brayton and Combined cycles for a medium-sized paper mill in Pakistan, to assess the potential for energy savings in this sector through improved energy efficiency. Thermodynamic and economic analysis are carried out to suggest the most appropriate option for the studied industrial unit. It was found that cogeneration based on the Brayton cycle is the most feasible option for the studied mill based on technical and economic perspectives, as it has the highest energy utilisation factor (EUF) and lowest annualised life cycle cost compared to the other proposed options. The overall saving of the proposed CHP system based on Brayton cycle is calculated at 2,515,216 USD annually. Keeping in view the energy crises in Pakistan, using energy efficient cogeneration systems and bio-fuel (rice husk) in the industrial sector, a significant amount of energy can be conserved, resulting in the reduction of GHGs and helping to achieve sustainability and a cleaner environment.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123944627","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
Direct Instantaneous Torque Control of Switched Reluctance Motor for Aerospace Applications 航空航天用开关磁阻电机的直接瞬时转矩控制
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541884
N. Dankadai, S. McDonald, M. Elgendy, D. Atkinson, S. Ullah, G. Atkinson
{"title":"Direct Instantaneous Torque Control of Switched Reluctance Motor for Aerospace Applications","authors":"N. Dankadai, S. McDonald, M. Elgendy, D. Atkinson, S. Ullah, G. Atkinson","doi":"10.1109/UPEC.2018.8541884","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541884","url":null,"abstract":"This paper presents a new Direct Instantaneous Torque Control (DITC) developed to minimize the inherent torque ripple of an aerospace switched reluctance motor (SRM). In addition to good performance, the reliability and robustness of the overall system are of great concern in aerospace and other safety-critical applications. By taking that into consideration, a DITC, that is less prone to the common erroneous operating conditions associated with SRM control such as measurement errors and noise, integration errors and parameter variation errors, is developed and compared with the traditional current chopping control (CCC). The proposed control scheme involves simple torque estimation, distribution, and regulation strategies. The results obtained show that both the proposed DITC and the traditional CCC methods ensure accurate reference tracking. However, the proposed control exhibits better torque ripple reduction capability without compromising the system’s reliability and robustness","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129458902","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
Fuel savings in remote Antarctic microgrids through energy management 通过能源管理节省南极偏远微电网的燃料
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541935
Can Berk Saner, S. Skarvelis-Kazakos
{"title":"Fuel savings in remote Antarctic microgrids through energy management","authors":"Can Berk Saner, S. Skarvelis-Kazakos","doi":"10.1109/UPEC.2018.8541935","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541935","url":null,"abstract":"Research stations in the Antarctic have their own electrical generation facilities and are not interconnected to any grid. Scarcity of fuel and unavailability of interconnection characterize these Antarctic energy systems as mission-critical isolated microgrids. In this work, an energy management strategy has been proposed for South African Antarctic research station SANAE IV for improving fuel efficiency. The proposed strategy consists of optimal dispatch of generation and installation of a thermal load controller for the supply side, and a novel demand response scheme for the demand side. The system was simulated using HOMER Microgrid Analysis Tool. Results showed an 8.30% decrease in fuel consumption, which corresponds to 21,876 litres of diesel annually. These savings can be achieved without major capital expenditure or difficult engineering work.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128570809","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
Parameter Optimization of DOCR and FCL in Microgrids Based on Grey Wolf Optimizer 基于灰狼优化器的微电网DOCR和FCL参数优化
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8542063
J. Yi, D. Shi
{"title":"Parameter Optimization of DOCR and FCL in Microgrids Based on Grey Wolf Optimizer","authors":"J. Yi, D. Shi","doi":"10.1109/UPEC.2018.8542063","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8542063","url":null,"abstract":"The operating time of directional overcurrent relays (DOCRs) can be reduced, while protection coordination is achieved, by setting the time dial setting (TDS) and pickup current of DOCRs. However, in the microgrids, the dual operating modes (grid-connected and islanded) and the introduction of distributed generations (DGs) bring some problems to coordination of DOCRs, due to changes in short-circuit levels. To limit the fault current levels and the effects of DGs on protection coordination, fault current limiters (FCLs) have been proposed. This paper employs grey wolf optimizer (GWO) to optimize the setting parameters of DOCRs and the values of FCLs not only in microgrids’ two operating modes, but also under two different kinds of protection coordination schemes. The comparison between optimized results obtained by five algorithms demonstrates the outstanding performance of GWO in low dimensional optimization problems and its potential for improvement.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129659290","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
Analysis of short circuit capability of copper screens in medium voltage (52 kV) cables when subjected to single phase earth faults 中压(52 kV)电缆单相接地故障时铜屏蔽短路性能分析
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541856
A. Collier, T. Looby, D. Finn
{"title":"Analysis of short circuit capability of copper screens in medium voltage (52 kV) cables when subjected to single phase earth faults","authors":"A. Collier, T. Looby, D. Finn","doi":"10.1109/UPEC.2018.8541856","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541856","url":null,"abstract":"The overall aim of this research was to examine the mechanical and thermal behaviour of 52 kV underground transmission cables when subjected to a short circuit event. A numerical model was developed and validated which examines the heat transfer from the shield wires during such short circuit occurrences. The model generates a temperature profile for the cable at different time intervals associated with normal operation, short circuit loading and post loading phase. The model was validated against experimental results and verified using the Grid Convergence Index (GCI) method. The model determined that the cable operates to specification for loads of 7,000 Amps and that there may be some scope for increasing the short circuit load rating of these cables.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"33 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132870361","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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