Pub Date : 2020-07-01DOI: 10.1109/ichqp46026.2020.9177880
{"title":"ICHQP 2020 Cover Page","authors":"","doi":"10.1109/ichqp46026.2020.9177880","DOIUrl":"https://doi.org/10.1109/ichqp46026.2020.9177880","url":null,"abstract":"","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117090909","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 : 2020-07-01DOI: 10.1109/ICHQP46026.2020.9177908
A. Bracale, P. Caramia, P. D. Falco, G. Carpinelli, A. Russo
The operation of an Electric Arc Furnace (EAF) determines power quality disturbances in terms of voltage fluctuations and waveform distortions, due to the particular nature of the heating process and of the electric arc phenomenon. The analysis of DC EAFs and their induced power quality disturbances may be conveniently posed within a chaotic modeling framework. This paper presents a procedure for tuning the parameters of a chaotic model for the DC electrical arc. The procedure is based on a Simulink representation of the DC EAF installation and on the Chua’s model to represent the arc chaotic behaviour. The parameters of the Chua’s model are iteratively tested and optimized to minimize the errors in the evaluation of the spectral content of current waveforms at the point of common coupling. Data measured at the point of common coupling of an actual DC EAF are considered to carry out numerical simulations aimed at verifying the effectiveness of the proposed tuning procedure.
{"title":"DC Electric Arc Furnace Modelling for Power Quality Indices Assessment","authors":"A. Bracale, P. Caramia, P. D. Falco, G. Carpinelli, A. Russo","doi":"10.1109/ICHQP46026.2020.9177908","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177908","url":null,"abstract":"The operation of an Electric Arc Furnace (EAF) determines power quality disturbances in terms of voltage fluctuations and waveform distortions, due to the particular nature of the heating process and of the electric arc phenomenon. The analysis of DC EAFs and their induced power quality disturbances may be conveniently posed within a chaotic modeling framework. This paper presents a procedure for tuning the parameters of a chaotic model for the DC electrical arc. The procedure is based on a Simulink representation of the DC EAF installation and on the Chua’s model to represent the arc chaotic behaviour. The parameters of the Chua’s model are iteratively tested and optimized to minimize the errors in the evaluation of the spectral content of current waveforms at the point of common coupling. Data measured at the point of common coupling of an actual DC EAF are considered to carry out numerical simulations aimed at verifying the effectiveness of the proposed tuning procedure.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121877910","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 : 2020-07-01DOI: 10.1109/ichqp46026.2020.9177938
B. A. Thango, J. Jordaan, A. Nnachi
In 2010, South Africa introduced the Renewable Energy Independent Power Producer Procurement Programme to invigorate low-carbon energy generation using renewable energy resources. Amongst the development of wind and hydro plants; solar photovoltaic plants then took off rapidly. The volume of solar PV plants connected to the grid in 2015 and 2016 was unparalleled. However, the solar PV electric power distribution network is challenged with the presence of unacceptable harmonics and distortion content at the point of common coupling due to the switching action of inverters and operation of non-linear loads. It therefore essential to precisely estimate the resultant increased load losses in order to estimate the hot spot temperature and total losses during service.In order to demonstrate the significance of these challenges, this paper provides a comprehensive harmonic analysis of an oil-filled transformer for the supplied geometrical data and harmonic spectrum of an oil-filled transformer. The load losses are evaluated under fundamental and harmonic conditions. The load losses are classified into I2R and stray losses. The I2R losses can be easily obtained by analytical calculations and also through practical measurement. On one hand, analytical calculation of the stray losses cannot give an optimized estimation and practically their immeasurable. In this paper, a 2D FEM model that is dynamic to any transformer geometrical data is developed to produce a pragmatic loss estimation by using knowledge of the magnetic flux density. Generally, analytical formulations neglect the radial magnetic flux density component. During operation, this component becomes predominant towards the winding ends and cannot be disregarded.
{"title":"Step-Up Transformers for PV Plants: Load Loss Estimation under Harmonic Conditions","authors":"B. A. Thango, J. Jordaan, A. Nnachi","doi":"10.1109/ichqp46026.2020.9177938","DOIUrl":"https://doi.org/10.1109/ichqp46026.2020.9177938","url":null,"abstract":"In 2010, South Africa introduced the Renewable Energy Independent Power Producer Procurement Programme to invigorate low-carbon energy generation using renewable energy resources. Amongst the development of wind and hydro plants; solar photovoltaic plants then took off rapidly. The volume of solar PV plants connected to the grid in 2015 and 2016 was unparalleled. However, the solar PV electric power distribution network is challenged with the presence of unacceptable harmonics and distortion content at the point of common coupling due to the switching action of inverters and operation of non-linear loads. It therefore essential to precisely estimate the resultant increased load losses in order to estimate the hot spot temperature and total losses during service.In order to demonstrate the significance of these challenges, this paper provides a comprehensive harmonic analysis of an oil-filled transformer for the supplied geometrical data and harmonic spectrum of an oil-filled transformer. The load losses are evaluated under fundamental and harmonic conditions. The load losses are classified into I2R and stray losses. The I2R losses can be easily obtained by analytical calculations and also through practical measurement. On one hand, analytical calculation of the stray losses cannot give an optimized estimation and practically their immeasurable. In this paper, a 2D FEM model that is dynamic to any transformer geometrical data is developed to produce a pragmatic loss estimation by using knowledge of the magnetic flux density. Generally, analytical formulations neglect the radial magnetic flux density component. During operation, this component becomes predominant towards the winding ends and cannot be disregarded.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"102 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122507934","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 : 2020-07-01DOI: 10.1109/ICHQP46026.2020.9177894
Yuanyuan Ma, Juncan Wang
Fault ride-through (FRT) capability of a synchronous generator is required by most grid codes. The PCC voltage and critical fault clearing time (CFT) are two important parameters to assess the FRT capability. Current studies are mainly based on repetitive simulations, which are very time-consuming. Thus, a general method is proposed to calculate PCC voltage and CFT of a synchronous generator connected to an infinite bus through a linear network. First, equivalent Thevenin voltage and reactance before, during and after the fault are calculated respectively. Then, by applying the equal-area criteria, critical clearing angle can be obtained, and CFT can be calculated by improved Euler method. Finally, a four-bus network is used as a case study. The results are in consistent with the simulations and the theoretical analysis.
{"title":"A General Method to Calculate the Critical Fault Clearing Time of A Synchronous Generator","authors":"Yuanyuan Ma, Juncan Wang","doi":"10.1109/ICHQP46026.2020.9177894","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177894","url":null,"abstract":"Fault ride-through (FRT) capability of a synchronous generator is required by most grid codes. The PCC voltage and critical fault clearing time (CFT) are two important parameters to assess the FRT capability. Current studies are mainly based on repetitive simulations, which are very time-consuming. Thus, a general method is proposed to calculate PCC voltage and CFT of a synchronous generator connected to an infinite bus through a linear network. First, equivalent Thevenin voltage and reactance before, during and after the fault are calculated respectively. Then, by applying the equal-area criteria, critical clearing angle can be obtained, and CFT can be calculated by improved Euler method. Finally, a four-bus network is used as a case study. The results are in consistent with the simulations and the theoretical analysis.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123896187","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 : 2020-07-01DOI: 10.1109/ICHQP46026.2020.9177932
Dilini Darmawardana, J. David, S. Perera, D. Robinson, Jan Meyer, U. Jayatunga
High frequency (HF) emissions in the range of 2-150 kHz (or Supraharmonics) originating due to the internal switching operation of power electronic devices are an emerging power quality concern in electricity distribution networks. Among many HF sources, electric vehicle (EV) chargers play an important role. However, the present understanding related to the behaviour of HF emissions due to EV charging is limited. Therefore, in this paper, HF emissions caused by charging of two EVs using their on-board chargers and a DC fast charging station are investigated. The findings of the study are expected to improve understanding related to HF emissions from EVs and provide important insights into modelling of EV chargers for HF studies.
{"title":"Analysis of High Frequency (Supraharmonics) Emissions Caused by Electric Vehicle Charging","authors":"Dilini Darmawardana, J. David, S. Perera, D. Robinson, Jan Meyer, U. Jayatunga","doi":"10.1109/ICHQP46026.2020.9177932","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177932","url":null,"abstract":"High frequency (HF) emissions in the range of 2-150 kHz (or Supraharmonics) originating due to the internal switching operation of power electronic devices are an emerging power quality concern in electricity distribution networks. Among many HF sources, electric vehicle (EV) chargers play an important role. However, the present understanding related to the behaviour of HF emissions due to EV charging is limited. Therefore, in this paper, HF emissions caused by charging of two EVs using their on-board chargers and a DC fast charging station are investigated. The findings of the study are expected to improve understanding related to HF emissions from EVs and provide important insights into modelling of EV chargers for HF studies.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129827446","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 : 2020-07-01DOI: 10.1109/ICHQP46026.2020.9177914
E. L. Carvalho, F. Passos, I. O. Cyrillo, J. Miranda, J. Filho, J. Carneiro, L. J. Motta, M. D. de Costa, N. Pereira, P. M. Silveira, T. C. de Oliveira
The increased sensitivity of equipment to electrical disturbances, the spread of nonlinear loads and the distributed generation are some of the factors that reinforce the importance of Power quality (PQ) to consumers and to distribution companies. Poor power quality can lead to equipment damage, interruptions and other consequences causing monetary losses most of the time. A good monitoring system is essential to guarantee power quality. Thus, more comprehensive and more efficient monitoring systems are desired by the electric utilities. In this context, this paper presents a review on the projects that have been developed by different utilities around the world, regarding power quality data monitoring and the management of these data from networks. Also, it presents a proposal of an automatic system for the management of power quality data to be implemented in the electrical grid of the Brazilian utilities EDP São Paulo and EDP Espírito Santo.
{"title":"A Proposal for Power Quality Management System","authors":"E. L. Carvalho, F. Passos, I. O. Cyrillo, J. Miranda, J. Filho, J. Carneiro, L. J. Motta, M. D. de Costa, N. Pereira, P. M. Silveira, T. C. de Oliveira","doi":"10.1109/ICHQP46026.2020.9177914","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177914","url":null,"abstract":"The increased sensitivity of equipment to electrical disturbances, the spread of nonlinear loads and the distributed generation are some of the factors that reinforce the importance of Power quality (PQ) to consumers and to distribution companies. Poor power quality can lead to equipment damage, interruptions and other consequences causing monetary losses most of the time. A good monitoring system is essential to guarantee power quality. Thus, more comprehensive and more efficient monitoring systems are desired by the electric utilities. In this context, this paper presents a review on the projects that have been developed by different utilities around the world, regarding power quality data monitoring and the management of these data from networks. Also, it presents a proposal of an automatic system for the management of power quality data to be implemented in the electrical grid of the Brazilian utilities EDP São Paulo and EDP Espírito Santo.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125650790","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 : 2020-07-01DOI: 10.1109/ICHQP46026.2020.9177877
J. Cheng, Yurui He, Huwei Cao, H. Shi, Jing Hu, T. Ding
Aiming at the problem of over-limit of distribution network node voltages caused by high-permeability distributed generation (DG) grid connection, the influence that single and multiple DG grid connection has on voltage distribution is analyzed firstly, and the different influencing factors such as DGs connection mode, capacity, location, and power factor are analyzed. Secondly, the minimization of total voltage deviation is taken as the target, and the optimal configuration mathematical model of DG considering various constraints such as power flow, node voltage, branch current, and DG capacity is established, and it is solved by adaptive weighted particle swarm optimization (AWPSO) algorithm. Finally, the IEEE33 node distribution network model is taken as an example to verify the rationality and effectiveness of the above method. The results show that the method can effectively control voltage deviation and network loss.
{"title":"Optimal Configuration of Distributed Generation for Improving Voltage Quality Based on Adaptive Weighted PSO","authors":"J. Cheng, Yurui He, Huwei Cao, H. Shi, Jing Hu, T. Ding","doi":"10.1109/ICHQP46026.2020.9177877","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177877","url":null,"abstract":"Aiming at the problem of over-limit of distribution network node voltages caused by high-permeability distributed generation (DG) grid connection, the influence that single and multiple DG grid connection has on voltage distribution is analyzed firstly, and the different influencing factors such as DGs connection mode, capacity, location, and power factor are analyzed. Secondly, the minimization of total voltage deviation is taken as the target, and the optimal configuration mathematical model of DG considering various constraints such as power flow, node voltage, branch current, and DG capacity is established, and it is solved by adaptive weighted particle swarm optimization (AWPSO) algorithm. Finally, the IEEE33 node distribution network model is taken as an example to verify the rationality and effectiveness of the above method. The results show that the method can effectively control voltage deviation and network loss.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130360395","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 : 2020-07-01DOI: 10.1109/ichqp46026.2020.9177939
{"title":"ICHQP 2020 List of Authors","authors":"","doi":"10.1109/ichqp46026.2020.9177939","DOIUrl":"https://doi.org/10.1109/ichqp46026.2020.9177939","url":null,"abstract":"","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132168100","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 : 2020-07-01DOI: 10.1109/ichqp46026.2020.9177879
{"title":"ICHQP 2020 Message from Conference Chairs","authors":"","doi":"10.1109/ichqp46026.2020.9177879","DOIUrl":"https://doi.org/10.1109/ichqp46026.2020.9177879","url":null,"abstract":"","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128932943","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 : 2020-07-01DOI: 10.1109/ICHQP46026.2020.9177905
L. Kukačka, J. Drapela
This paper presents a modeling approach for FL ballasts and LED drivers with adjustable topology and feedback control of switching converter stages suitable for flicker sensitivity studies. The driver model is based on switch-averaging modeling principle. Together with a generalized lamp model it can be used to estimate flicker level of given driver and lamp combination. Out of eight driver classes identified in related literature, the model is fitted – and thus verified – on two classes, the first corresponding to a current-controlled DC-DC converter and consisting of one active, closed-loop controlled, converter stage, the latter corresponding to two stage closed-loop controlled driver.
{"title":"A Preliminary Study on Modeling of Voltage Induced Flicker Sensitivity of Fluorescent and LED Lamps with Closed-Loop Control","authors":"L. Kukačka, J. Drapela","doi":"10.1109/ICHQP46026.2020.9177905","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177905","url":null,"abstract":"This paper presents a modeling approach for FL ballasts and LED drivers with adjustable topology and feedback control of switching converter stages suitable for flicker sensitivity studies. The driver model is based on switch-averaging modeling principle. Together with a generalized lamp model it can be used to estimate flicker level of given driver and lamp combination. Out of eight driver classes identified in related literature, the model is fitted – and thus verified – on two classes, the first corresponding to a current-controlled DC-DC converter and consisting of one active, closed-loop controlled, converter stage, the latter corresponding to two stage closed-loop controlled driver.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128439434","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：