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Algebraic Modelling of Converters without DC Fault Ride-Through Capability for Short Circuit Current Calculation of DC Distribution Grids 无直流故障穿越能力变流器直流配电网短路电流计算的代数建模
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8542028
Raphael Bleilevens, A. Moser
{"title":"Algebraic Modelling of Converters without DC Fault Ride-Through Capability for Short Circuit Current Calculation of DC Distribution Grids","authors":"Raphael Bleilevens, A. Moser","doi":"10.1109/UPEC.2018.8542028","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8542028","url":null,"abstract":"This paper presents an novel algebraic model to approximate the DC short circuit current contribution of converters without DC fault ride-through capability. The model is used for an algebraic short circuit current calculation method of DC distribution grids. In a first step, this paper analyses the behavior of different converter topologies in case of a DC side short circuit. Afterwards, a general algebraic model for converter without DC fault ride-through capability is derived by calculating short circuit current characteristics and approximating the current course. Finally, the model is evaluated by comparing the results of the model with the results of detailed transient simulations. Thereby, the model is verified for different parameter variations. Furthermore, the presented model is compared to an existing model which is provided by standard IEC 61660. The comparison proves that the novel model is advantageous.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"68 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":"129919709","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
A Turnkey Solution for Extruded Cable Testing 挤压电缆测试交钥匙解决方案
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541881
Claudius Freye, S. Frobin, Christoph Felix Niedik, F. Jenau, Dominik Häring, G. Schröder, Matthew Kirkley, André Männecke
{"title":"A Turnkey Solution for Extruded Cable Testing","authors":"Claudius Freye, S. Frobin, Christoph Felix Niedik, F. Jenau, Dominik Häring, G. Schröder, Matthew Kirkley, André Männecke","doi":"10.1109/UPEC.2018.8541881","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541881","url":null,"abstract":"Thermal qualification of cables for energy transmission has been well established within science, standardization and testing facilities for decades. Especially, for high voltage direct current (HVDC) cables, heat cycle tests gain momentum. Field distribution within HVDC cables differs significantly from that present in alternating current (AC) cables, as material properties are affected by thermal stresses. With the aim of providing a turnkey solution for automated thermal investigation on cables and their accessories, a suitable test setup has been designed, installed and validated. Besides normative testing routines, the presented setup provides capabilities for research purposes. After a brief overview of heat cycle tests, the overall system design is presented. Subsequently, the installation and validation process is elaborated. Furthermore, aspects regarding normative requirements, reactive power compensation, measuring and automation concepts and solutions for system integration and housing are described.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"190 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":"132683521","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 Voltage Sag in Transmission System and Its Effect on Large Customers of Central-1 Area of Lao PDR 老挝中一区输电系统电压暂降分析及其对大用户的影响
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541866
Visanoukone Sothammavong, S. Premrudeepreechacharn, K. Ngamsanroaj
{"title":"Analysis of Voltage Sag in Transmission System and Its Effect on Large Customers of Central-1 Area of Lao PDR","authors":"Visanoukone Sothammavong, S. Premrudeepreechacharn, K. Ngamsanroaj","doi":"10.1109/UPEC.2018.8541866","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541866","url":null,"abstract":"This paper presents a voltage sag analysis method in the transmission system which focuses on its effect on large customers. The scope of this study is 115kV and 22 kV power system of Central-1 Area of Electricité du Laos (EDL) in Vientiane Capital, Lao’s People Democratic Republic (Lao PDR). The method of voltage sag assessment will be presented that can as a guideline for the power system engineers on planning for improving their system and the large customer for protecting the sensitive equipment. The proposed method evaluates the reliability of transmission system by using the record of interruption number and repaired time duration per year which had occurred in Central-1 Area of EDL. DIgSILENT Power Factory is used as a tool to simulate the system.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"9 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":"133225544","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
Frequency Control of Power System with Wind Farms by Using Output Frequency Band Control of HVDC Interconnection Line 利用高压直流互联线路输出频带控制风电场电力系统频率
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541850
Kimiko Tada, A. Umemura, R. Takahashi, J. Tamura, Y. Matsumura, D. Yamaguchi, H. Kudo, M. Niiyama, Yasuhito Taki
{"title":"Frequency Control of Power System with Wind Farms by Using Output Frequency Band Control of HVDC Interconnection Line","authors":"Kimiko Tada, A. Umemura, R. Takahashi, J. Tamura, Y. Matsumura, D. Yamaguchi, H. Kudo, M. Niiyama, Yasuhito Taki","doi":"10.1109/UPEC.2018.8541850","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541850","url":null,"abstract":"In recent years, environmental problems are becoming serious and renewable energy has attracted attention as their solutions. However, the electricity generation using the renewable energy has a demerit that the output becomes unstable because of intermittent characteristics such as variations of wind speed. Frequency fluctuations due to the installation of large-scale wind farm (WF) into the power system is a major concern. In order to solve the problem, this paper proposes a new coordinated control method using High Voltage Direct Current (HVDC) interconnection line to suppress the frequency fluctuations due to large scale WF. The frequency control method using notch-band pass filter and the HVDC power control using dead band is proposed in this paper. Validity of the proposed method is verified through simulation analyses which is performed on a multi-machine power system model.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"157 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":"134524753","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
Dimensioning of battery storage as temporary equipment during grid reinforcement caused by electric vehicles 电动汽车引起的电网加固过程中作为临时设备的蓄电池储能的尺寸
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8542035
L. Held, H. Krämer, M. Zimmerlin, M. Suriyah, T. Leibfried, Levin Ratajczak, S. Lossau, M. Konermann
{"title":"Dimensioning of battery storage as temporary equipment during grid reinforcement caused by electric vehicles","authors":"L. Held, H. Krämer, M. Zimmerlin, M. Suriyah, T. Leibfried, Levin Ratajczak, S. Lossau, M. Konermann","doi":"10.1109/UPEC.2018.8542035","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8542035","url":null,"abstract":"Electric vehicle charging stresses distribution grids significantly. This will lead to grid reinforcement works in several distribution grids. Battery storage is a possibility to bypass times of grid reinforcement due to electric vehicle charging. In this paper, we dimension such a battery storage for a demonstration project using an optimal power flow algorithm and realistic profiles for electric vehicle charging and load consumption. The optimal power flow algorithm determines the necessary rated power and energy of the battery and ensures the compliance with the given grid limits.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"96 5 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":"130959370","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: 10
A Modified Particle Swarm Optimization based Maximum Power Point Tracking for PV Systems 基于改进粒子群算法的光伏系统最大功率点跟踪
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8542065
M. Alshareef, Zhengyu Lin
{"title":"A Modified Particle Swarm Optimization based Maximum Power Point Tracking for PV Systems","authors":"M. Alshareef, Zhengyu Lin","doi":"10.1109/UPEC.2018.8542065","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8542065","url":null,"abstract":"This paper presents a modified particle swarm optimization (MPSO) based Maximum Power Point Tracking (MPPT) method for PV system, which integrates fractional open circuit voltage (FOCV) method. The proposed algorithm uses FOCV principle to resolve the issues faced by conventional particle swarm optimization (PSO) based MPPT method, by initializing the particles nearby the global maximum power point (MPP). The proposed algorithm is highly robust and has good dynamic response. MATLAB/ SIMULINK based simulation study was conducted and subsequently, an experimental setup was developed to verify the effectiveness of the proposed method, and the results were compared with conventional PSO based MPPT algorithm, as well as the Perturb and Observe (P&O) MPPT method.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"256 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":"133309823","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
Data Averaging for Modelling Energy Storage: What Information is Hidden? 储能建模的数据平均:隐藏了什么信息?
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541917
M. Persson, D. Mignard, D. Hogg
{"title":"Data Averaging for Modelling Energy Storage: What Information is Hidden?","authors":"M. Persson, D. Mignard, D. Hogg","doi":"10.1109/UPEC.2018.8541917","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541917","url":null,"abstract":"Hydrogen could potentially stabilize the varying output energy from renewable sources. Current developments in water electrolysis for the production of hydrogen from renewable energy, focuses on improving costs and efficiencies. Bright Green Hydrogen, based in Methil, Fife, have set up a hydrogen demonstration project called the Levenmouth Community Energy Project (LCEP), to showcase and explore electrolytic hydrogen’s advantages as an energy storage system. The site has several measurement points to track performance of the system, with a range of resolutions available for the data. Research is ongoing to find locations and requirements where hydrogen storage for renewable energy is both technically and economically feasible. For this research, it is important that the resolution of the data is carefully considered to avoid losing important details, but also aiding in developing an efficient tool. This paper will discuss a data sample from the system at different resolutions to highlight the risks of losing important details that can have lasting a impact.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"56 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":"133291229","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
Two-layer earth structure parameter estimation and seasonal analysis 双层土结构参数估算及季节分析
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541959
T. Papadopoulos, O. Ceylan, G. Papagiannis
{"title":"Two-layer earth structure parameter estimation and seasonal analysis","authors":"T. Papadopoulos, O. Ceylan, G. Papagiannis","doi":"10.1109/UPEC.2018.8541959","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541959","url":null,"abstract":"The determination of soil parameters is an important topic regarding the safe and efficient design of electrical grounding systems as well as the accurate calculation of the per-unit-length parameters of overhead transmission lines and underground cable systems. Scope of this paper is to investigate the seasonal variation of the two-layer earth structure parameters and propose simple generic models for this type of the analysis. For the determination of the two-layer earth parameters the application of different optimization methods is evaluated. Furthermore, soil resistivity measurements are conducted at three different sites during a period of a whole year. The obtained results of the two-layer earth structure are analyzed, in order to investigate the seasonal variation and their correlation to changes of rainfall. From the analysis of the results significant conclusions are drawn regarding the accuracy of the resulting soil parameters as well as their annual variation.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"19 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":"114373743","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
An analysis of large-scale transmission power blackouts from 2005 to 2016 2005 - 2016年大规模输电停电分析
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541901
Maxime Velay, M. Vinyals, Y. Bésanger, N. Retière
{"title":"An analysis of large-scale transmission power blackouts from 2005 to 2016","authors":"Maxime Velay, M. Vinyals, Y. Bésanger, N. Retière","doi":"10.1109/UPEC.2018.8541901","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541901","url":null,"abstract":"Power transmission blackouts, have large technical, economic, and social consequences in the affected areas. As power systems evolve with new customs, technologies and regulations, continuous analysis of recent blackouts is crucial for identifying new trends and for updating prevention measures.In this paper, we analyze 9 major blackouts that happened between 2005 and 2016, to complete previous blackout studies. We classify these blackouts depending on the conditions and events before and during the cascades and identify their main characteristics. Our analysis reveals that blackouts from the last decade tend to happen in periods of normal loading with some important equipment out of service and with highly dependent transmission system regions. Moreover, recent blackouts show a tendency to enter directly the fast cascade, leaving system operators with hardly any time to take any countermeasure.","PeriodicalId":340842,"journal":{"name":"2018 53rd International Universities Power Engineering Conference (UPEC)","volume":"48 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":"114318769","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
Manage Reverse Power Flow and Fault Current Level in LV Network with High Penetration of Small Scale Solar and Wind Power Generation 小型太阳能和风力发电高渗透的低压电网反向潮流和故障电流水平的管理
2018 53rd International Universities Power Engineering Conference (UPEC) Pub Date : 2018-09-01 DOI: 10.1109/UPEC.2018.8541923
K. N. Bangash, M. Farrag, A. Osman
{"title":"Manage Reverse Power Flow and Fault Current Level in LV Network with High Penetration of Small Scale Solar and Wind Power Generation","authors":"K. N. Bangash, M. Farrag, A. Osman","doi":"10.1109/UPEC.2018.8541923","DOIUrl":"https://doi.org/10.1109/UPEC.2018.8541923","url":null,"abstract":"High penetration level of rooftop small-scale renewable energy generation (REG) such as solar and wind power into the existing low voltage (LV) network would cause the flow of power in reverse direction. This would also vary the level of short-circuit current required for relays to operate. Relay settings would be required to properly detect the unpredictable fault current and isolate the faulty section. This paper investigates the impact of residential distributed generation (DG) penetration level on the typical UK low voltage network protection system. Studies were commenced to properly charge and discharge the home connected energy storage battery (ESB). ESB is used as a remedial measure to confine the flow of reverse power due to rooftop DGs. Penetration level DGs are modeled based on proper ESB charging and discharging states in daily load cycle. Short circuit analysis is simulated on Matlab/Simulink. The power flow from the transformer secondary is managed to avoid malfunctioning of relays according to daily load cycle. Short circuit analysis results are compared with the UK passive network to investigate the impact of the DG on the short circuit currents at distribution transformer.","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":"116548619","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
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