Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548150
Ma’d El-Dalahmeh, Prudhive Thummarapally, M. Al-Greer, M. El‐Dalahmeh
Predict the capacity of lithium-ion batteries with high accuracy is crucial to the reliability and safety of the system. Due to the complex nature and the nonlinear degradation phenomena of the lithium-ion battery, monitoring the battery's capacity is a challenging task. This paper proposes a machine learning model based on time and frequency domain health indicators to predict the capacity of lithium-ion battery cycled under different operational conditions. The time and frequency domain health indicators have been extracted from the measured voltage. The extracted features have been fed into extreme learning machine model to predict the capacity. This approach has been tested on 16 lithium-ion batteries cycled at many operational conditions from NASA. The results show that the proposed method can track the degradation from the extracted health indicators from both domains (time and frequency). The extreme learning model can effectively predict the capacity with a root mean square error of 1.3%.
{"title":"Time and Frequency Domain Health Indicators for Capacity Prediction of Lithium-ion Battery","authors":"Ma’d El-Dalahmeh, Prudhive Thummarapally, M. Al-Greer, M. El‐Dalahmeh","doi":"10.1109/UPEC50034.2021.9548150","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548150","url":null,"abstract":"Predict the capacity of lithium-ion batteries with high accuracy is crucial to the reliability and safety of the system. Due to the complex nature and the nonlinear degradation phenomena of the lithium-ion battery, monitoring the battery's capacity is a challenging task. This paper proposes a machine learning model based on time and frequency domain health indicators to predict the capacity of lithium-ion battery cycled under different operational conditions. The time and frequency domain health indicators have been extracted from the measured voltage. The extracted features have been fed into extreme learning machine model to predict the capacity. This approach has been tested on 16 lithium-ion batteries cycled at many operational conditions from NASA. The results show that the proposed method can track the degradation from the extracted health indicators from both domains (time and frequency). The extreme learning model can effectively predict the capacity with a root mean square error of 1.3%.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122703188","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548256
Joelson Lopes da Paixão, A. Abaide, J. Sausen, Leonardo N. F. Silva, L. D. da Silva
This paper presents the development of a methodology to evaluate candidates places for installation an EV fast charging microgrid (EVFCM), composed by charging station, electrical grid connection, photovoltaic carport and a small wind generation. The methodology proposed focus on evaluating pre-defined points over eleven different criteria, such as: vehicle flux, proximity of medium voltage grid, availability of wind and solar generation, and socioeconomical data from place and population. The overall goal is to classify hierarchically this points to find the best options places to install the EVFCM. The case study is applied in the east of the state of Rio Grande do Sul, and the predefined points are sitting along important highways that connect Brazil to Uruguay.
{"title":"EV Fast Charging Microgrid on Highways: A Hierarchical Analysis for Choosing the Installation Site","authors":"Joelson Lopes da Paixão, A. Abaide, J. Sausen, Leonardo N. F. Silva, L. D. da Silva","doi":"10.1109/UPEC50034.2021.9548256","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548256","url":null,"abstract":"This paper presents the development of a methodology to evaluate candidates places for installation an EV fast charging microgrid (EVFCM), composed by charging station, electrical grid connection, photovoltaic carport and a small wind generation. The methodology proposed focus on evaluating pre-defined points over eleven different criteria, such as: vehicle flux, proximity of medium voltage grid, availability of wind and solar generation, and socioeconomical data from place and population. The overall goal is to classify hierarchically this points to find the best options places to install the EVFCM. The case study is applied in the east of the state of Rio Grande do Sul, and the predefined points are sitting along important highways that connect Brazil to Uruguay.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"219 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127605296","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548212
V. Radulescu
Romania is considered the country in Southeast Europe with the highest wind potential, with a production capacity of over 14 GW. Currently, due to the investments of over 9 billion euros made in wind farms, approximately 2500 MW are produced from wind, representing about 20-25% of domestic energy production. In addition to the existing wind power plants, three more new wind farms will soon be realized. This paper presents a methodology for optimizing the distribution of turbines in a wind farm so as to minimize the mutual influence of turbines during operation, due to the wake effect. A correlation is created between the mast-induced disturbances and the turbine nacelle, the recorded atmospheric data, and the number of turbines rows. Fluent software is used to model the main vortex produced by the rotor, for which the computational field is structured in the main wind direction. The vortices behind the rotor and nacelle are estimated. The measured and recorded data of significant air parameters in the future location of the wind farm, in the southern part of Moldova, are briefly presented. The numerical model was tested for several types of turbines with a capacity of about 2 MW, thus conducting a comparative study. Based on these results, the possible energy to be produced multi-annually was evaluated. A new correction of the turbine distribution was made, by estimating the implementation costs of the wind farm with turbines distributed in two and 100 rows.
{"title":"Optimizing the turbines distribution in wind farms based on mutual minimization of the wake effect","authors":"V. Radulescu","doi":"10.1109/UPEC50034.2021.9548212","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548212","url":null,"abstract":"Romania is considered the country in Southeast Europe with the highest wind potential, with a production capacity of over 14 GW. Currently, due to the investments of over 9 billion euros made in wind farms, approximately 2500 MW are produced from wind, representing about 20-25% of domestic energy production. In addition to the existing wind power plants, three more new wind farms will soon be realized. This paper presents a methodology for optimizing the distribution of turbines in a wind farm so as to minimize the mutual influence of turbines during operation, due to the wake effect. A correlation is created between the mast-induced disturbances and the turbine nacelle, the recorded atmospheric data, and the number of turbines rows. Fluent software is used to model the main vortex produced by the rotor, for which the computational field is structured in the main wind direction. The vortices behind the rotor and nacelle are estimated. The measured and recorded data of significant air parameters in the future location of the wind farm, in the southern part of Moldova, are briefly presented. The numerical model was tested for several types of turbines with a capacity of about 2 MW, thus conducting a comparative study. Based on these results, the possible energy to be produced multi-annually was evaluated. A new correction of the turbine distribution was made, by estimating the implementation costs of the wind farm with turbines distributed in two and 100 rows.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115103952","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548235
Simone Striani, Kristian Sevdari, Lisa Calearo, P. B. Andersen, M. Marinelli
The mass penetration of electric vehicles (EVs) could develop grid stability problems due to the increase of peak loads created by coincident charging factors. Smart charging is the control of the EV charging loads and has long been identified as a potential solution. Smart charging could also contribute to grid stability by mitigating the intermittent nature of renewable energy generation. This paper describes the current status of EV flexibility services at the distribution level. The analysis of the smart charging status is done considering the technological, economic and regulatory frameworks, and presenting what the different barriers of each of these aspects are. Additionally, the paper introduces the ACDC project (Autonomously Controlled Distributed Charger), which aims at developing an EV clustering method based on distributed smart charging control logic for flexibility services. For divulgation purposes, the scheduled test case scenario of the parking lot at the Technical University of Denmark is described. The paper concludes on some of the most relevant actions to overcome the most imminent barriers and to push further the roll-out of EV charging infrastructure towards the target EV penetration planned by policymakers.
{"title":"Barriers and Solutions for EVs Integration in the Distribution Grid","authors":"Simone Striani, Kristian Sevdari, Lisa Calearo, P. B. Andersen, M. Marinelli","doi":"10.1109/UPEC50034.2021.9548235","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548235","url":null,"abstract":"The mass penetration of electric vehicles (EVs) could develop grid stability problems due to the increase of peak loads created by coincident charging factors. Smart charging is the control of the EV charging loads and has long been identified as a potential solution. Smart charging could also contribute to grid stability by mitigating the intermittent nature of renewable energy generation. This paper describes the current status of EV flexibility services at the distribution level. The analysis of the smart charging status is done considering the technological, economic and regulatory frameworks, and presenting what the different barriers of each of these aspects are. Additionally, the paper introduces the ACDC project (Autonomously Controlled Distributed Charger), which aims at developing an EV clustering method based on distributed smart charging control logic for flexibility services. For divulgation purposes, the scheduled test case scenario of the parking lot at the Technical University of Denmark is described. The paper concludes on some of the most relevant actions to overcome the most imminent barriers and to push further the roll-out of EV charging infrastructure towards the target EV penetration planned by policymakers.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124522280","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548194
Rahul Rane, A. Pandey, F. Kazi
Large areas of modern power systems are inter-connected for improved power pooling, resulting in higher system inertia. On the other hand, it provides the capability of long-distance transmission of power. Thus, increasing the potential of tie-lines to run at near-maximum capacity. The probability of inter-area oscillations between two areas increases as tie lines are operated closer to full capacity, and this is particularly prevalent near high load density areas. Inter-area stability analysis is becoming more difficult as the current power system becomes more interconnected. This paper implements the energy-sorted Matrix Pencil Method (MPM) on a real-time simulation testbed to perform an online estimation of Low-Frequency Electromechanical Oscillations (LFEOs) present in a power system that is complex and highly interconnected and also implements an oscillation detection method on Phasor Measurement Units (PMUs) data to ensure that energy-sorted MPM is be applied to the relevant data type. As a result, the estimation of modal parameters can be utilized further with confidence and promptly. The proposed process is evaluated on a Klein-Rogers-Kundur test case, and the outcome of the simulation is presented which justifies the effectiveness of energy-sorted MPM in real-time LEFOs.
{"title":"Real-Time Electromechanical Mode Identification through Energy-sorted Matrix Pencil Method","authors":"Rahul Rane, A. Pandey, F. Kazi","doi":"10.1109/UPEC50034.2021.9548194","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548194","url":null,"abstract":"Large areas of modern power systems are inter-connected for improved power pooling, resulting in higher system inertia. On the other hand, it provides the capability of long-distance transmission of power. Thus, increasing the potential of tie-lines to run at near-maximum capacity. The probability of inter-area oscillations between two areas increases as tie lines are operated closer to full capacity, and this is particularly prevalent near high load density areas. Inter-area stability analysis is becoming more difficult as the current power system becomes more interconnected. This paper implements the energy-sorted Matrix Pencil Method (MPM) on a real-time simulation testbed to perform an online estimation of Low-Frequency Electromechanical Oscillations (LFEOs) present in a power system that is complex and highly interconnected and also implements an oscillation detection method on Phasor Measurement Units (PMUs) data to ensure that energy-sorted MPM is be applied to the relevant data type. As a result, the estimation of modal parameters can be utilized further with confidence and promptly. The proposed process is evaluated on a Klein-Rogers-Kundur test case, and the outcome of the simulation is presented which justifies the effectiveness of energy-sorted MPM in real-time LEFOs.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"255 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122645000","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548259
Z. M. Pinter, Dimitrios Papageorgiou, Gunnar Rohde, M. Marinelli, C. Træholt
Battery cells within battery energy storage systems (BESS) do not have homogeneous attributes, and the lowest capacity ones limit the performance and lifetime of the whole pack. Modern battery management systems (BMS) solve this problem with balancing, while providing the required service, and safe operation to the user. Reconfigurable battery systems (RBS) are BESSs that involve a BMS with reconfiguration. Reconfiguration uses feedback to determine the circuit switching logic. This paper presents a structured review of the control algorithms for RBSs. The RBSs are divided into groups according to their control strategies and control implementations. Finding the adequate control strategy requires well-defined objectives and control design. The control implementation focuses on physical and architectural aspects, like the reconfiguration frequency, the balancing operation and the control topology. The considerations and categories are discussed with the advantages, disadvantages and academic examples, and then an innovative industrial BMS is introduced.
{"title":"Review of Control Algorithms for Reconfigurable Battery Systems with an Industrial Example","authors":"Z. M. Pinter, Dimitrios Papageorgiou, Gunnar Rohde, M. Marinelli, C. Træholt","doi":"10.1109/UPEC50034.2021.9548259","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548259","url":null,"abstract":"Battery cells within battery energy storage systems (BESS) do not have homogeneous attributes, and the lowest capacity ones limit the performance and lifetime of the whole pack. Modern battery management systems (BMS) solve this problem with balancing, while providing the required service, and safe operation to the user. Reconfigurable battery systems (RBS) are BESSs that involve a BMS with reconfiguration. Reconfiguration uses feedback to determine the circuit switching logic. This paper presents a structured review of the control algorithms for RBSs. The RBSs are divided into groups according to their control strategies and control implementations. Finding the adequate control strategy requires well-defined objectives and control design. The control implementation focuses on physical and architectural aspects, like the reconfiguration frequency, the balancing operation and the control topology. The considerations and categories are discussed with the advantages, disadvantages and academic examples, and then an innovative industrial BMS is introduced.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122832657","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548243
Michael O Donovan, N. Barry, J. Connell, Eoin Cowhey
Many electrical utilities worldwide are increasingly using series compensation to meet the need to add large amounts of renewable energy resources such as wind and solar to the existing power system network. In series compensated lines, the effective line inductive reactance becomes small due to the capacitive compensation. This can lead to voltage and current inversion and subsynchronous oscillations during disturbances along the series compensated line. For distance relays, special consideration must be taken for series compensated, and adjacent lines due to the series capacitor bank (SCB) alters the line impedance. This can cause a protection relay to operate for faults beyond its normal reach. A 400 kV series compensated network is modelled using DigSilent Power Factory. Electromagnetic transients (EMT) analysis was performed on distance protection devices on the network. The results presented in this paper show that a series compensated line presents challenges for setting distance relay protection where a three-phase fault can lead to overreach, voltage, or current inversion at different network locations.
世界范围内的许多电力公司越来越多地采用串联补偿来满足向现有电力系统网络中添加大量可再生能源(如风能和太阳能)的需求。在串联补偿线路中，由于容性补偿，有效线路电感抗变小。这可能导致电压和电流反转和次同步振荡期间沿串联补偿线路的干扰。对于距离继电器，必须特别考虑串联补偿，由于串联电容器组(SCB)改变了线路阻抗，相邻线路。这可能导致保护继电器在超出其正常范围的故障时运行。利用DigSilent Power Factory对400kv串联补偿网络进行了建模。对网络中的距离保护装置进行了电磁瞬变分析。本文的结果表明，串联补偿线路对设置距离继电保护提出了挑战，其中三相故障可能导致不同网络位置的过伸，电压或电流反转。
{"title":"Analysis of a Midpoint Series Compensated Line","authors":"Michael O Donovan, N. Barry, J. Connell, Eoin Cowhey","doi":"10.1109/UPEC50034.2021.9548243","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548243","url":null,"abstract":"Many electrical utilities worldwide are increasingly using series compensation to meet the need to add large amounts of renewable energy resources such as wind and solar to the existing power system network. In series compensated lines, the effective line inductive reactance becomes small due to the capacitive compensation. This can lead to voltage and current inversion and subsynchronous oscillations during disturbances along the series compensated line. For distance relays, special consideration must be taken for series compensated, and adjacent lines due to the series capacitor bank (SCB) alters the line impedance. This can cause a protection relay to operate for faults beyond its normal reach. A 400 kV series compensated network is modelled using DigSilent Power Factory. Electromagnetic transients (EMT) analysis was performed on distance protection devices on the network. The results presented in this paper show that a series compensated line presents challenges for setting distance relay protection where a three-phase fault can lead to overreach, voltage, or current inversion at different network locations.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125860662","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548257
Mohamed Osman, G. Taylor, B. Rawn, T. Nwachukwu
The structure of the Nigerian interconnected system, which includes long power lines and a small number of generators, leads to technical challenges to stability of the interconnection. The static models of the Nigerian high voltage system indicate certain system deficiencies and weak points, but records and observations of system collapses suggest that swing instabilities are sometimes part of rapid frequency decline. A dynamic model of system behavior can help determine whether system stability is major limiting factor for system operation, enable better forensic analysis of blackout events, lead to proposals for mitigating measures within the reach of operators. Accurate modelling of generator excitation systems represents a critical first step in the development of robust dynamic models-but validated excitation system parameters are not necessarily available for all generators, for when not all parameters are available, this paper establishes and tests a procedure that is used to select credible parameters. The paper demonstrates how one can build acceptable power system model that supports preliminary benchmarking and validation.
{"title":"Development of Excitation System Modelling Approaches for the Nigerian Grid","authors":"Mohamed Osman, G. Taylor, B. Rawn, T. Nwachukwu","doi":"10.1109/UPEC50034.2021.9548257","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548257","url":null,"abstract":"The structure of the Nigerian interconnected system, which includes long power lines and a small number of generators, leads to technical challenges to stability of the interconnection. The static models of the Nigerian high voltage system indicate certain system deficiencies and weak points, but records and observations of system collapses suggest that swing instabilities are sometimes part of rapid frequency decline. A dynamic model of system behavior can help determine whether system stability is major limiting factor for system operation, enable better forensic analysis of blackout events, lead to proposals for mitigating measures within the reach of operators. Accurate modelling of generator excitation systems represents a critical first step in the development of robust dynamic models-but validated excitation system parameters are not necessarily available for all generators, for when not all parameters are available, this paper establishes and tests a procedure that is used to select credible parameters. The paper demonstrates how one can build acceptable power system model that supports preliminary benchmarking and validation.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125888346","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548221
J. Hansen, Sebastian T. Østerfelt, P. Randewijk
This paper concerns power system stability challenges for large scale integration of renewable energy sources. Specifically, the focus of this study is based on the Suðuroy power grid on the Faroe Islands, where a 7MW wind farm – equal to the maximum load for the entire grid – is scheduled for grid integration in 2021. The paper examines whether a synchronverter can help provide grid stability when the grid is solely powered by the wind farm by adding virtual inertia to the network. The operation of the synchronverter has been tested in a simulation scenario with a load step using DIgSILENT PowerFactory. The results were compared to a solution with a synchronous condenser (SC) and a battery energy storage system (BESS) with grid following operation, as opposed to the synchronverter that operates as a grid-forming converter. The simulations proved that the synchronverter has the ability to contribute to the grid stability without the typical limitations traditional solutions have. However, the results still require further investigation – both from a practical and an economical consideration – before ultimately determining if it is currently a viable alternative to already existing and typically applied solutions.
{"title":"The Use of Synchronverters for Fast Frequency Response and Automatic Voltage Regulation in Low Inertia Islanded Power Networks","authors":"J. Hansen, Sebastian T. Østerfelt, P. Randewijk","doi":"10.1109/UPEC50034.2021.9548221","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548221","url":null,"abstract":"This paper concerns power system stability challenges for large scale integration of renewable energy sources. Specifically, the focus of this study is based on the Suðuroy power grid on the Faroe Islands, where a 7MW wind farm – equal to the maximum load for the entire grid – is scheduled for grid integration in 2021. The paper examines whether a synchronverter can help provide grid stability when the grid is solely powered by the wind farm by adding virtual inertia to the network. The operation of the synchronverter has been tested in a simulation scenario with a load step using DIgSILENT PowerFactory. The results were compared to a solution with a synchronous condenser (SC) and a battery energy storage system (BESS) with grid following operation, as opposed to the synchronverter that operates as a grid-forming converter. The simulations proved that the synchronverter has the ability to contribute to the grid stability without the typical limitations traditional solutions have. However, the results still require further investigation – both from a practical and an economical consideration – before ultimately determining if it is currently a viable alternative to already existing and typically applied solutions.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129266193","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}
Pub Date : 2021-08-31DOI: 10.1109/UPEC50034.2021.9548236
J. P. Uwiringiyimana, Suwarno, U. Khayam
Partial discharge (PD) activity in high-voltage power equipment is a warning sign of insulation degradation that subsequently leads to the aging and breakdown of the power equipment. For the reliable and safe operation of high voltage power equipment, a PD diagnostic technique needs to be performed to assess and monitor closely the insulation condition. This paper presents a new type of UHF microstrip patch antenna with ultra-wideband frequency that can assist the UHF PD monitoring system to detect PD on high voltage equipment such as power transformers. This antenna was designed and simulated using CST Microwave Studio software. After design and simulation, the antenna was fabricated on a printed circuit board with FR4-epoxy substrate having a thickness of 1.6mm and dielectric permittivity of 4.4. The radiating patch and ground plane of this antenna are made of copper whose thickness is 0.035. The designed microstrip patch antenna was implemented to detect partial discharge on the transformer tank model. Based on the measurement results of the antenna characteristic parameters by using the Vector Network Analyzer, it is seen that the designed antenna has an operating frequency range of 1.2GHz-4.5GHz, and a bandwidth of 3.3GHz. Based on PD measurement results, the new design of the microstrip patch antenna has a high sensitivity in detecting the PD signals caused by insulation defects inside the transformer tank. The ultra-wideband frequency response of this antenna makes it a suitable and promising sensor for PD detection and PD recognition on high voltage equipment such as power transformers.
{"title":"New Design of UHF Microstrip Patch Antenna for Partial Discharge Detection on Power Transformer","authors":"J. P. Uwiringiyimana, Suwarno, U. Khayam","doi":"10.1109/UPEC50034.2021.9548236","DOIUrl":"https://doi.org/10.1109/UPEC50034.2021.9548236","url":null,"abstract":"Partial discharge (PD) activity in high-voltage power equipment is a warning sign of insulation degradation that subsequently leads to the aging and breakdown of the power equipment. For the reliable and safe operation of high voltage power equipment, a PD diagnostic technique needs to be performed to assess and monitor closely the insulation condition. This paper presents a new type of UHF microstrip patch antenna with ultra-wideband frequency that can assist the UHF PD monitoring system to detect PD on high voltage equipment such as power transformers. This antenna was designed and simulated using CST Microwave Studio software. After design and simulation, the antenna was fabricated on a printed circuit board with FR4-epoxy substrate having a thickness of 1.6mm and dielectric permittivity of 4.4. The radiating patch and ground plane of this antenna are made of copper whose thickness is 0.035. The designed microstrip patch antenna was implemented to detect partial discharge on the transformer tank model. Based on the measurement results of the antenna characteristic parameters by using the Vector Network Analyzer, it is seen that the designed antenna has an operating frequency range of 1.2GHz-4.5GHz, and a bandwidth of 3.3GHz. Based on PD measurement results, the new design of the microstrip patch antenna has a high sensitivity in detecting the PD signals caused by insulation defects inside the transformer tank. The ultra-wideband frequency response of this antenna makes it a suitable and promising sensor for PD detection and PD recognition on high voltage equipment such as power transformers.","PeriodicalId":325389,"journal":{"name":"2021 56th International Universities Power Engineering Conference (UPEC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129438941","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}
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