Pub Date : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241143
E. Carlini, Albert C Pesce, Mirko Piazza, Alessio Salmaso, A. Berizzi, D. Falabretti, Corrado Mattevi
The paper describes the events that led, in November 2019, to a local blackout in Trentino-Alto Adige (Northern Italy). The events were caused by a heavy snowstorm that resulted in about 7000 faults on the electric system for short-circuits, trees falling on electrical lines etc. In consequence, a 132 kV portion of the grid, and the underlying MV/LV distribution grid, remained isolated from the national transmission grid a part of the 132 kV power system. Overall, approximately 25 thousand customers were involved in a local blackout for more than 24 hours. However, the blackout has been mitigated by the attempts of operating the local system as an electric island, exploiting the black start capability of hydro power plants with enough power capacity to supply the island resulting from the disconnection. The paper describes the main features of the island operation, the main problems encountered until the final restoration, the lessons learned and provides a set of suggestions in order to mitigate the effects of such heavy weather phenomena in the future.
{"title":"Islanding Operation During the 2019 Alto Adige Snowstorm Emergency","authors":"E. Carlini, Albert C Pesce, Mirko Piazza, Alessio Salmaso, A. Berizzi, D. Falabretti, Corrado Mattevi","doi":"10.23919/AEIT50178.2020.9241143","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241143","url":null,"abstract":"The paper describes the events that led, in November 2019, to a local blackout in Trentino-Alto Adige (Northern Italy). The events were caused by a heavy snowstorm that resulted in about 7000 faults on the electric system for short-circuits, trees falling on electrical lines etc. In consequence, a 132 kV portion of the grid, and the underlying MV/LV distribution grid, remained isolated from the national transmission grid a part of the 132 kV power system. Overall, approximately 25 thousand customers were involved in a local blackout for more than 24 hours. However, the blackout has been mitigated by the attempts of operating the local system as an electric island, exploiting the black start capability of hydro power plants with enough power capacity to supply the island resulting from the disconnection. The paper describes the main features of the island operation, the main problems encountered until the final restoration, the lessons learned and provides a set of suggestions in order to mitigate the effects of such heavy weather phenomena in the future.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"56 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77198522","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241126
R. Lamedica, A. Ruvio, G. G. Buffarini, N. Carones, C. Cianfarani
The paper focuses on evaluation of stray current distribution and rail potential for “Albate-Chiasso” DC railway line, that connects Italy and Switzerland. A model has been developed to calculate stray current and rail potential taking into account the European Standard, in order to avoid electrolytic corrosion and electrical safety problems. A real case study has been presented and simulated using Simulink software. A measurement campaign has been used to validate the model proposed.
{"title":"Analysis of the electrolytic corrosion in the railway line Albate-Chiasso","authors":"R. Lamedica, A. Ruvio, G. G. Buffarini, N. Carones, C. Cianfarani","doi":"10.23919/AEIT50178.2020.9241126","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241126","url":null,"abstract":"The paper focuses on evaluation of stray current distribution and rail potential for “Albate-Chiasso” DC railway line, that connects Italy and Switzerland. A model has been developed to calculate stray current and rail potential taking into account the European Standard, in order to avoid electrolytic corrosion and electrical safety problems. A real case study has been presented and simulated using Simulink software. A measurement campaign has been used to validate the model proposed.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"46 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79230700","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241186
M. Andriollo, Rahul R. Kumar, A. Tortella, Riccardo Zavagnin
The paper aims at the definition of proper indicators for the effective detection of stator inter-turn faults in line connected induction motors. The procedure uses a finite element model related to a standard medium rated motor, tuned taking into account both magnetic saturation and the actual winding scheme. After the experimental check with reference to different load conditions, multiple fault indicators are evaluated by elaborating the motor current components. The same model predicts the effects of asymmetric voltage supply on the current harmonics to prevent misleading fault detection. Moreover, a relation between fault severity and the experimental setup to reproduce similar current asymmetries as in the actual fault condition has been examined. On this basis, some measurements have been carried out, enabling to have a broad check on the fault indicator effectiveness.
{"title":"FEM based Assessment of Winding Inter-Tum Fault Indicators in Line Connected Induction Motors","authors":"M. Andriollo, Rahul R. Kumar, A. Tortella, Riccardo Zavagnin","doi":"10.23919/AEIT50178.2020.9241186","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241186","url":null,"abstract":"The paper aims at the definition of proper indicators for the effective detection of stator inter-turn faults in line connected induction motors. The procedure uses a finite element model related to a standard medium rated motor, tuned taking into account both magnetic saturation and the actual winding scheme. After the experimental check with reference to different load conditions, multiple fault indicators are evaluated by elaborating the motor current components. The same model predicts the effects of asymmetric voltage supply on the current harmonics to prevent misleading fault detection. Moreover, a relation between fault severity and the experimental setup to reproduce similar current asymmetries as in the actual fault condition has been examined. On this basis, some measurements have been carried out, enabling to have a broad check on the fault indicator effectiveness.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"106 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81216043","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241207
Massimo Battaglioni, M. Baldi, G. Cancellieri
We focus on regular and irregular quasi-cyclic low-density parity-check codes and analyze their codewords. We show that any codeword can be decomposed into component codewords with smaller weight belonging to some component codes. Component codewords can be associated to cycles in the Tanner graph of the code. We transfer these theoretical results into the code design, finding that the removal of some specific classes of cycles yields benefits in terms of minimum distance and error rate performance.
{"title":"Improving the minimum distance of QC-LDPC codes by removing cycles","authors":"Massimo Battaglioni, M. Baldi, G. Cancellieri","doi":"10.23919/AEIT50178.2020.9241207","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241207","url":null,"abstract":"We focus on regular and irregular quasi-cyclic low-density parity-check codes and analyze their codewords. We show that any codeword can be decomposed into component codewords with smaller weight belonging to some component codes. Component codewords can be associated to cycles in the Tanner graph of the code. We transfer these theoretical results into the code design, finding that the removal of some specific classes of cycles yields benefits in terms of minimum distance and error rate performance.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"53 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83174429","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241152
Emilio Giovannini
Open-cast mines and quarries often use high power electrical machinery to extract materials from the site they are located. Due to the power of machinery, these activities require a MV electricity supply. They are very often located in sites where the soil has high resistivity, and it couldn’t be easy to guarantee the protection against indirect contacts according to EN 50522:2010-11 provisions. This is particularly true along the excavation front. The electrical properties of the soil on which the machinery are installed may change quickly and so changes the distribution of the potentials during MV earth faults. Risk control based on touch voltages measurements could not be a reliable technique; better to search structural solutions to guarantee the worker’s protection. The requirements of the EN 50522:2010-11 standard are evaluated not only under the electrical point of view, but keeping in mind the particular context. A metal mesh laid along the operating locations and connected to the metal chassis of the machinery is a simple and reliable solution. Measures executed in Italian quarries confirm this.
{"title":"Risk assessment and control in protection against indirect contacts for Medium Voltage earth faults in open-cast mines and quarries","authors":"Emilio Giovannini","doi":"10.23919/AEIT50178.2020.9241152","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241152","url":null,"abstract":"Open-cast mines and quarries often use high power electrical machinery to extract materials from the site they are located. Due to the power of machinery, these activities require a MV electricity supply. They are very often located in sites where the soil has high resistivity, and it couldn’t be easy to guarantee the protection against indirect contacts according to EN 50522:2010-11 provisions. This is particularly true along the excavation front. The electrical properties of the soil on which the machinery are installed may change quickly and so changes the distribution of the potentials during MV earth faults. Risk control based on touch voltages measurements could not be a reliable technique; better to search structural solutions to guarantee the worker’s protection. The requirements of the EN 50522:2010-11 standard are evaluated not only under the electrical point of view, but keeping in mind the particular context. A metal mesh laid along the operating locations and connected to the metal chassis of the machinery is a simple and reliable solution. Measures executed in Italian quarries confirm this.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"10 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88734796","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241184
Baheej Alghamdi, Katharina Wieninger, C. Cañizares
This paper presents a distributed, droop-free voltage control of a dc microgrid in grid-connected and isolated mode. The proposed control technique, based on a distributed consensus approach, addresses reliability issues of centralized controllers that are prone to single point failure, while sharing the loads among Distributed Energy Resources (DERs) more effectively than conventional decentralized droop controllers. The distributed control scheme is implemented, demonstrated, and compared with conventional droop control using time-domain simulations for a model of an actual dc microgrid in Xiamen University, China, based on various realistic scenarios.
{"title":"Distributed Voltage Control of DC Microgrids","authors":"Baheej Alghamdi, Katharina Wieninger, C. Cañizares","doi":"10.23919/AEIT50178.2020.9241184","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241184","url":null,"abstract":"This paper presents a distributed, droop-free voltage control of a dc microgrid in grid-connected and isolated mode. The proposed control technique, based on a distributed consensus approach, addresses reliability issues of centralized controllers that are prone to single point failure, while sharing the loads among Distributed Energy Resources (DERs) more effectively than conventional decentralized droop controllers. The distributed control scheme is implemented, demonstrated, and compared with conventional droop control using time-domain simulations for a model of an actual dc microgrid in Xiamen University, China, based on various realistic scenarios.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"15 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87316846","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241128
Alessandro Bosisio, A. Berizzi, A. Morotti, B. Greco, G. Iannarelli
The paper proposes a reliability evaluation for meshed distribution networks based on minimal cut sets method. Distribution networks with meshed layout but radially operated have been commonly used in urban environments since they give some advantages in terms of lines thermal limit and voltage drop. The evaluation procedure is divided into three steps: firstly, it determines the minimal cut sets from each source node to each load nodes of the DN; secondly, it calculates the failure rate and the outage time for each minimal cut sets identified; lastly, it calculates the system average interruption frequency index and the system average interruption duration index. A sensitivity analysis of two specific system layouts, which we refer to as 1-step ladder and 2-steps ladder, has been carried out varying the maximum power flow allowed during normal operation. The method shows that, to improve reliability, as more as the distribution network is loaded as more as it should be meshed.
{"title":"Reliability evaluation for meshed distribution networks based on minimal cut sets method","authors":"Alessandro Bosisio, A. Berizzi, A. Morotti, B. Greco, G. Iannarelli","doi":"10.23919/AEIT50178.2020.9241128","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241128","url":null,"abstract":"The paper proposes a reliability evaluation for meshed distribution networks based on minimal cut sets method. Distribution networks with meshed layout but radially operated have been commonly used in urban environments since they give some advantages in terms of lines thermal limit and voltage drop. The evaluation procedure is divided into three steps: firstly, it determines the minimal cut sets from each source node to each load nodes of the DN; secondly, it calculates the failure rate and the outage time for each minimal cut sets identified; lastly, it calculates the system average interruption frequency index and the system average interruption duration index. A sensitivity analysis of two specific system layouts, which we refer to as 1-step ladder and 2-steps ladder, has been carried out varying the maximum power flow allowed during normal operation. The method shows that, to improve reliability, as more as the distribution network is loaded as more as it should be meshed.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"7 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88227388","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241086
M. Celidonio, E. Fionda, C. Riva
Recent technological advances made possible the development of devices and integrated circuits operating at frequencies greater than 100 GHz and telco operators, in order to face with the growing demand for bandwidth from users, are increasingly turning their interest to the feasibility of use wireless links also at sub-millimeter frequencies (300 GHz–l THz). This spectral region, also named TeraHertz band, offers greater availability of contiguous bands and is under investigation by international standardization bodies such as ITU and CEPT. The present study intends to provide useful insights to define technical and operational characteristics for 5G applications aimed at land-based fixed services operating in bands up to 1 THz. In this study simulations was carried out to provide an estimation of attenuation levels due to the gaseous component, precipitating events present in the troposphere at the ground level. Furthermore, radio refractivity was also estimated. All results are referred to the Italian territory and for frequencies ranging from 40 to 840 GHz.
{"title":"An estimation of tropospheric agents influence on 5G terrestrial radio services in the THz band","authors":"M. Celidonio, E. Fionda, C. Riva","doi":"10.23919/AEIT50178.2020.9241086","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241086","url":null,"abstract":"Recent technological advances made possible the development of devices and integrated circuits operating at frequencies greater than 100 GHz and telco operators, in order to face with the growing demand for bandwidth from users, are increasingly turning their interest to the feasibility of use wireless links also at sub-millimeter frequencies (300 GHz–l THz). This spectral region, also named TeraHertz band, offers greater availability of contiguous bands and is under investigation by international standardization bodies such as ITU and CEPT. The present study intends to provide useful insights to define technical and operational characteristics for 5G applications aimed at land-based fixed services operating in bands up to 1 THz. In this study simulations was carried out to provide an estimation of attenuation levels due to the gaseous component, precipitating events present in the troposphere at the ground level. Furthermore, radio refractivity was also estimated. All results are referred to the Italian territory and for frequencies ranging from 40 to 840 GHz.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"51 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78291830","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241149
L. Pellegrino, R. Lazzari, M. Verga, C. Sandroni
The energy transition is changing the electrical power system. The increasing number of distributed energy resources in the distribution system and the digitalisation of most of the sensors and actuators are bringing the electrical grid to became a Smart Grid. Component and system testing for Smart Grid topics can introduce many challenges. ERIGrid Project tried to Figure out some of the upcoming issues investigating the possibility to expand Smart Grids laboratories potentialities and capabilities by means of research institutes cooperation and Research Infrastructures integration. Different tools for laboratory integration have been developed in the project. Among them a new methodology, called Holistic Test Description, has been developed with the goal to help researchers to clearly identify the test scope and the best test procedure to be adopted. Moreover a new communication tool, called JaNDER, has been developed by Ricerca sul Sistema Energetico (RSE) which is also member of the consortium of ERIGrid Project. This tool allows real time data communication between Research Infrastructures in an easy and effective way enabling a virtual connection between laboratories. These tools have been successfully tested and proved in the Distributed Energy Resources Test Facility (DER-TF) of RSE both by RSE researchers and also external users demonstrating the possibility to largely extend Smart Grid laboratories experimental potentialities. This paper shows some of the developed tools and presents some tests performed in RSE DER-TF that demonstrate how laboratories integration can reduce test set-up timing, optimise laboratory usage and improve the quality of experimental testing activities.
能源转型正在改变电力系统。随着配电系统中分布式能源数量的不断增加，以及大多数传感器和执行器的数字化，电网正在成为智能电网。智能电网主题的组件和系统测试可能会带来许多挑战。ERIGrid项目试图找出一些即将出现的问题，通过研究机构合作和研究基础设施集成的方式来扩大智能电网实验室的潜力和能力的可能性。该项目开发了用于实验室集成的不同工具。其中一种新的方法，称为整体测试描述，已经开发出来，其目的是帮助研究人员清楚地确定测试范围和最好的测试程序被采用。此外，Ricerca sul Sistema Energetico (RSE)也开发了一种名为JaNDER的新型通信工具，RSE也是ERIGrid项目联盟的成员。该工具允许在研究基础设施之间以一种简单有效的方式进行实时数据通信，从而实现实验室之间的虚拟连接。这些工具已经在RSE的分布式能源测试设施(DER-TF)中由RSE研究人员和外部用户成功测试和验证，证明了在很大程度上扩展智能电网实验室实验潜力的可能性。本文展示了一些开发的工具，并展示了在RSE DER-TF中执行的一些测试，这些测试展示了实验室集成如何减少测试设置时间，优化实验室使用并提高实验测试活动的质量。
{"title":"Research Infrastructures integration to foster Smart Grid testing","authors":"L. Pellegrino, R. Lazzari, M. Verga, C. Sandroni","doi":"10.23919/AEIT50178.2020.9241149","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241149","url":null,"abstract":"The energy transition is changing the electrical power system. The increasing number of distributed energy resources in the distribution system and the digitalisation of most of the sensors and actuators are bringing the electrical grid to became a Smart Grid. Component and system testing for Smart Grid topics can introduce many challenges. ERIGrid Project tried to Figure out some of the upcoming issues investigating the possibility to expand Smart Grids laboratories potentialities and capabilities by means of research institutes cooperation and Research Infrastructures integration. Different tools for laboratory integration have been developed in the project. Among them a new methodology, called Holistic Test Description, has been developed with the goal to help researchers to clearly identify the test scope and the best test procedure to be adopted. Moreover a new communication tool, called JaNDER, has been developed by Ricerca sul Sistema Energetico (RSE) which is also member of the consortium of ERIGrid Project. This tool allows real time data communication between Research Infrastructures in an easy and effective way enabling a virtual connection between laboratories. These tools have been successfully tested and proved in the Distributed Energy Resources Test Facility (DER-TF) of RSE both by RSE researchers and also external users demonstrating the possibility to largely extend Smart Grid laboratories experimental potentialities. This paper shows some of the developed tools and presents some tests performed in RSE DER-TF that demonstrate how laboratories integration can reduce test set-up timing, optimise laboratory usage and improve the quality of experimental testing activities.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"34 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87990650","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 : 2020-09-23DOI: 10.23919/AEIT50178.2020.9241102
Ying Xue, Conghuan Yang, Xiao-Ping Zhang
Conventional LCC HVDC system is unable to provide dynamic reactive power and AC voltage support to power system during transient events. This can have adverse impacts on the renewable generation that is connected to the same power system such as wind farms. This paper aims to demonstrate that the Flexible LCC HVDC system can provide dynamic reactive power and AC voltage support to a wind integrated power system. The Flexible LCC HVDC system is able to quickly inject reactive power into the system, reducing the voltage drop and increasing the speed of voltage recovery. This will help the wind farms in riding through the fault. At the same time, due to the elimination of Commutation Failure (CF) in the Flexible LCC HVDC system, it is able to maintain a relatively stable active power transfer as well. Simulation comparisons between the conventional LCC HVDC and the Flexible LCC HVDC based on a wind integrated two area power system have been presented to validate the performance.
{"title":"Reactive Power and AC Voltage Support from Flexible LCC HVDC to Wind Energy Integrated Power System","authors":"Ying Xue, Conghuan Yang, Xiao-Ping Zhang","doi":"10.23919/AEIT50178.2020.9241102","DOIUrl":"https://doi.org/10.23919/AEIT50178.2020.9241102","url":null,"abstract":"Conventional LCC HVDC system is unable to provide dynamic reactive power and AC voltage support to power system during transient events. This can have adverse impacts on the renewable generation that is connected to the same power system such as wind farms. This paper aims to demonstrate that the Flexible LCC HVDC system can provide dynamic reactive power and AC voltage support to a wind integrated power system. The Flexible LCC HVDC system is able to quickly inject reactive power into the system, reducing the voltage drop and increasing the speed of voltage recovery. This will help the wind farms in riding through the fault. At the same time, due to the elimination of Commutation Failure (CF) in the Flexible LCC HVDC system, it is able to maintain a relatively stable active power transfer as well. Simulation comparisons between the conventional LCC HVDC and the Flexible LCC HVDC based on a wind integrated two area power system have been presented to validate the performance.","PeriodicalId":6689,"journal":{"name":"2020 AEIT International Annual Conference (AEIT)","volume":"71 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2020-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90464314","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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