Pub Date : 2018-06-08DOI: 10.1109/ICHQP.2018.8378895
S. Babaev, V. Ćuk, J. Cobben, H. E. van den Brom, G. Rietveld, A. Jongepier
This paper proposes a method for determining the limitations of harmonic modeling based on measured emissions and standard harmonic impedance models using synchronized spectrum measurements. It was found that the calculation method performs very well for the fundamental frequency and reasonably well for some harmonic orders. The limiting factors based on measurement uncertainty are discussed, and some proposals for future studies are given.
{"title":"On the limitations of harmonic modeling with measured inputs - a case study","authors":"S. Babaev, V. Ćuk, J. Cobben, H. E. van den Brom, G. Rietveld, A. Jongepier","doi":"10.1109/ICHQP.2018.8378895","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378895","url":null,"abstract":"This paper proposes a method for determining the limitations of harmonic modeling based on measured emissions and standard harmonic impedance models using synchronized spectrum measurements. It was found that the calculation method performs very well for the fundamental frequency and reasonably well for some harmonic orders. The limiting factors based on measurement uncertainty are discussed, and some proposals for future studies are given.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"2013 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86369274","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 : 2018-06-08DOI: 10.1109/ICHQP.2018.8378944
K. Limtrakul, S. Premrudeepreechacharn, Y. Baghzouz
In energize and de-energize shunt reactor, through the circuit breaker will result in overcurrent and overvoltage, which will impact on equipment and power quality in the transmission network. This paper will perform an analysis of the energize and de-energize shunt reactors. By switching shunt reactors, the three poles trip circuit breaker will cause an inductive current during interruption by the system model to simulate the transient induction during switching with the PSCAD/EMTDC program. EGAT's 500 kV transmission line is a case study for analyzing overcurrent, current chopping, chopping overvoltage and re- ignition phenomena caused by switching circuit breaker.
{"title":"Analysis of replacement from disconnecting switch to circuit breaker for 500 kV line shunt reactor","authors":"K. Limtrakul, S. Premrudeepreechacharn, Y. Baghzouz","doi":"10.1109/ICHQP.2018.8378944","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378944","url":null,"abstract":"In energize and de-energize shunt reactor, through the circuit breaker will result in overcurrent and overvoltage, which will impact on equipment and power quality in the transmission network. This paper will perform an analysis of the energize and de-energize shunt reactors. By switching shunt reactors, the three poles trip circuit breaker will cause an inductive current during interruption by the system model to simulate the transient induction during switching with the PSCAD/EMTDC program. EGAT's 500 kV transmission line is a case study for analyzing overcurrent, current chopping, chopping overvoltage and re- ignition phenomena caused by switching circuit breaker.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"1 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89580593","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 : 2018-06-08DOI: 10.1109/ICHQP.2018.8378897
Y. Sun, E. D. de Jong, V. Ćuk, J. Cobben
Plug-in electric vehicle (PEV) is gaining steadily preference among consumers as they offer economically viable and environmentally friendly transportation solutions when compared to their gasoline powered counterparts. A decent charging station network coverage has been identified as the main enabler for the adoption of PEV. Therefore, the availability of ultrafast charging station (UFCS) is not only a technical prerequisite but also a key enabler for the consumer acceptance to bring the electric mobility to the next level. To facilitate the smooth integration of UFCS in the existing power grid, hence rapid uptake rate of PEV, this article elaborates on the analytical derivation of the norton equivalent for the study of harmonic resonance when several UFCSs are connected to the local medium voltage (MV) grid. The impedance of norton equivalent model explicitly represents the input admittance of power converter under small signal perturbation. A case study is performed on the Dutch Bronsbergen MV grid to which 10 UFCSs are connected and its impact on the grid resonance point is shown with harmonic distortion calculation.
{"title":"Harmonic resonance risk of massive ultra fast charging station grid integration","authors":"Y. Sun, E. D. de Jong, V. Ćuk, J. Cobben","doi":"10.1109/ICHQP.2018.8378897","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378897","url":null,"abstract":"Plug-in electric vehicle (PEV) is gaining steadily preference among consumers as they offer economically viable and environmentally friendly transportation solutions when compared to their gasoline powered counterparts. A decent charging station network coverage has been identified as the main enabler for the adoption of PEV. Therefore, the availability of ultrafast charging station (UFCS) is not only a technical prerequisite but also a key enabler for the consumer acceptance to bring the electric mobility to the next level. To facilitate the smooth integration of UFCS in the existing power grid, hence rapid uptake rate of PEV, this article elaborates on the analytical derivation of the norton equivalent for the study of harmonic resonance when several UFCSs are connected to the local medium voltage (MV) grid. The impedance of norton equivalent model explicitly represents the input admittance of power converter under small signal perturbation. A case study is performed on the Dutch Bronsbergen MV grid to which 10 UFCSs are connected and its impact on the grid resonance point is shown with harmonic distortion calculation.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"60 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80766655","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 : 2018-06-08DOI: 10.1109/ICHQP.2018.8378922
Wen-jun Tang, Yi-Syuan Wu, Hong-Tzer Yang
By shedding their electricity consumption or getting ready to be shed, the Demand Response (DR) program compensates the shortage of generation or acts as spinning reserve. Depending on how the end-users join in the program. the potential capacity of DR is, therefore, a key issue no matter to system operator or DR aggregator. The proposed method employs adaptive k-means approach to evaluate the potential consumer as candidate participants of DR. The consumption prediction models of controllable appliances are constructed by Gaussian Processes for Machine Learning (GPML). Through combining the candidates' data and prediction models, the potential capacity is then achieved. Case studies evaluate the accuracy and efficacy of the proposed method with practical low voltage advanced metering infrastructure (LVAMI) data achieved from Taiwan. The results show good efficiency and practicability of the proposed method.
{"title":"Adaptive segmentation and machine learning based potential DR capacity analysis","authors":"Wen-jun Tang, Yi-Syuan Wu, Hong-Tzer Yang","doi":"10.1109/ICHQP.2018.8378922","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378922","url":null,"abstract":"By shedding their electricity consumption or getting ready to be shed, the Demand Response (DR) program compensates the shortage of generation or acts as spinning reserve. Depending on how the end-users join in the program. the potential capacity of DR is, therefore, a key issue no matter to system operator or DR aggregator. The proposed method employs adaptive k-means approach to evaluate the potential consumer as candidate participants of DR. The consumption prediction models of controllable appliances are constructed by Gaussian Processes for Machine Learning (GPML). Through combining the candidates' data and prediction models, the potential capacity is then achieved. Case studies evaluate the accuracy and efficacy of the proposed method with practical low voltage advanced metering infrastructure (LVAMI) data achieved from Taiwan. The results show good efficiency and practicability of the proposed method.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"5 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76389605","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 : 2018-06-08DOI: 10.1109/ICHQP.2018.8378939
J. Kilter, D. Vujatovic, S. Elphick, H. Renner, J. Van Coller, S. Djokic, Frans van Erp
This paper summarizes some of the main results of CIGRE WG C4.27 “Benchmarking of Power Quality Performance in Transmission Systems”. The results presented in this paper cover the work of the WG from December 2012 to October 2017 in relation to the general process of power quality performance benchmarking in transmission systems. The paper includes discussion on the principles of the PQ benchmarking process, purpose and motivation for benchmarking, gathering of PQ data, system characteristics and benchmarking against peers and past performance.
本文总结了CIGRE WG C4.27“输电系统电能质量性能基准测试”的一些主要结果。本文介绍的结果涵盖了工作组从2012年12月到2017年10月在输电系统电能质量性能基准测试的一般过程中所做的工作。本文讨论了PQ基准过程的原则，基准测试的目的和动机，PQ数据的收集，系统特征以及与同行和过去表现的基准测试。
{"title":"A general process recommended by CIGRE WG C4.27 for benchmarking power quality performance in transmission systems","authors":"J. Kilter, D. Vujatovic, S. Elphick, H. Renner, J. Van Coller, S. Djokic, Frans van Erp","doi":"10.1109/ICHQP.2018.8378939","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378939","url":null,"abstract":"This paper summarizes some of the main results of CIGRE WG C4.27 “Benchmarking of Power Quality Performance in Transmission Systems”. The results presented in this paper cover the work of the WG from December 2012 to October 2017 in relation to the general process of power quality performance benchmarking in transmission systems. The paper includes discussion on the principles of the PQ benchmarking process, purpose and motivation for benchmarking, gathering of PQ data, system characteristics and benchmarking against peers and past performance.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"158 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-06-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82471347","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 : 2018-05-13DOI: 10.1109/ICHQP.2018.8378841
Carlos Eduardo Moreira Rodrigues, M. de Lima Tostes
The increasing use of equipment that employs electronic converters with high switching frequencies, in addition to the equipment that performs reactive compensation, has led to the appearance of harmonic components of orders higher than those normally observed in electrical systems. This phenomenon, called supraharmonics, is not yet fully understood and several questions related to its characteristics are being raised by several research groups. In this context, this paper presents a case study of the measurement of supraharmonics in a commercial installation of the banking sector and shows the analysis developed using Wavelet Packet Transform for the extraction of information that can efficiently characterize the phenomenon.
{"title":"Characterization of supraharmonics using the wavelet packet transform","authors":"Carlos Eduardo Moreira Rodrigues, M. de Lima Tostes","doi":"10.1109/ICHQP.2018.8378841","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378841","url":null,"abstract":"The increasing use of equipment that employs electronic converters with high switching frequencies, in addition to the equipment that performs reactive compensation, has led to the appearance of harmonic components of orders higher than those normally observed in electrical systems. This phenomenon, called supraharmonics, is not yet fully understood and several questions related to its characteristics are being raised by several research groups. In this context, this paper presents a case study of the measurement of supraharmonics in a commercial installation of the banking sector and shows the analysis developed using Wavelet Packet Transform for the extraction of information that can efficiently characterize the phenomenon.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"131 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75822664","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 : 2018-05-13DOI: 10.1109/ICHQP.2018.8378837
S. Kawasaki, Masanari Mochizuki, Nobuo Ninomiya
In recent years, the debasement of power quality of a distribution system such as the increase of power system harmonics has been apprehended. It is thought to be causally related to the diversification of loads by progress of power electronics technology and the increase of the number of interconnection of distributed generators for home use with the reduction of the effect on the environment. The harmonics cause not only deterioration of power quality but also further various problems. In this paper, the authors propose an estimation method of harmonic sources by separating the harmonic current flowing through the distribution lines. In addition, the authors carry out the numerical calculation and experiment in order to verify the validity of the proposed method.
{"title":"Estimation method of harmonic sources on distribution system and experimental verification","authors":"S. Kawasaki, Masanari Mochizuki, Nobuo Ninomiya","doi":"10.1109/ICHQP.2018.8378837","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378837","url":null,"abstract":"In recent years, the debasement of power quality of a distribution system such as the increase of power system harmonics has been apprehended. It is thought to be causally related to the diversification of loads by progress of power electronics technology and the increase of the number of interconnection of distributed generators for home use with the reduction of the effect on the environment. The harmonics cause not only deterioration of power quality but also further various problems. In this paper, the authors propose an estimation method of harmonic sources by separating the harmonic current flowing through the distribution lines. In addition, the authors carry out the numerical calculation and experiment in order to verify the validity of the proposed method.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"43 1","pages":"1-5"},"PeriodicalIF":0.0,"publicationDate":"2018-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"80085065","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 : 2018-05-13DOI: 10.1109/ICHQP.2018.8378906
J. Drapela, R. Langella, A. Testa, J. Grappe
This paper shows the results of a real life case-study which demonstrates also that there is a need for new Flickermeters able to cope with new lamps' technologies different from standard incandescent, in particular with LED lamps. The case-study refers to a LED lamp that was visibly flickering even if measurements taken onsite with a standard PQ instrument reported neither THD nor Pst issues. Numerical tests using a new Flickermeter proposed by some of the authors and laboratory experiments by means of an objective light Flickermeter have demonstrated the reasons of this singular case.
{"title":"A real life light flicker case-study with LED lamps","authors":"J. Drapela, R. Langella, A. Testa, J. Grappe","doi":"10.1109/ICHQP.2018.8378906","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378906","url":null,"abstract":"This paper shows the results of a real life case-study which demonstrates also that there is a need for new Flickermeters able to cope with new lamps' technologies different from standard incandescent, in particular with LED lamps. The case-study refers to a LED lamp that was visibly flickering even if measurements taken onsite with a standard PQ instrument reported neither THD nor Pst issues. Numerical tests using a new Flickermeter proposed by some of the authors and laboratory experiments by means of an objective light Flickermeter have demonstrated the reasons of this singular case.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"20 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84456649","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 : 2018-05-13DOI: 10.1109/ICHQP.2018.8378816
Daniel Agudelo-Martinez, A. Pavas
A set of measurements and simulations describing the relationship between conducted disturbances of a Compact Fluorescent Lamp (CFL) within the range 2–150 kHz, and some variations in its base circuit, are shown and analyzed in this article. Measurements are carried out using some low power CFL devices in single operation. Simulations of a typical CFL circuit without any Power Factor Corrector stage are performed by means of LTSpice® simulator. Measurements show a particular behavior of 2–150 kHz disturbances in current signals in CFL devices, and similarities with some disturbances from LED lamps. Variations at EMI filter, Rectifier, and Smoothing filter stages show strong influence on emissions within this frequency range. Hence, variations in base circuit allow these emissions to change when devices are in single operation. The results from measure ments and simulations are a step forward in understanding and modeling emissions in the 2–150 kHz frequency range.
{"title":"Measurement and simulation of power quality disturbances between 2–150 kHz from compact fluorescent lamps","authors":"Daniel Agudelo-Martinez, A. Pavas","doi":"10.1109/ICHQP.2018.8378816","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378816","url":null,"abstract":"A set of measurements and simulations describing the relationship between conducted disturbances of a Compact Fluorescent Lamp (CFL) within the range 2–150 kHz, and some variations in its base circuit, are shown and analyzed in this article. Measurements are carried out using some low power CFL devices in single operation. Simulations of a typical CFL circuit without any Power Factor Corrector stage are performed by means of LTSpice® simulator. Measurements show a particular behavior of 2–150 kHz disturbances in current signals in CFL devices, and similarities with some disturbances from LED lamps. Variations at EMI filter, Rectifier, and Smoothing filter stages show strong influence on emissions within this frequency range. Hence, variations in base circuit allow these emissions to change when devices are in single operation. The results from measure ments and simulations are a step forward in understanding and modeling emissions in the 2–150 kHz frequency range.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"5 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82404053","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 : 2018-05-13DOI: 10.1109/ICHQP.2018.8378881
J. Roldán-Pérez, M. Prodanović, A. Rodríguez-Cabero, Josep M. Guerrero, A. García-Cerrada
Power electronics interfaces are commonly used for renewable energy integration in microgrids and their control as synchronverters represents an alternative to typical control configurations. This control technique introduces many advan tages, but several issues need to be properly addressed including power quality and harmonic current sharing. In this paper, a method to deal with the current harmonics distribution in microgrids based on synchronverters is introduced. A Finite-Gain Repetitive Controller (FRC) is added to the control system of a current-controlled synchronverter. It is shown that the use of this alternative controller allows current harmonics to be shared between the Ditributed Generators (DGs) feeding a non-linear load. In addition, it is shown that the FRC represents a robust solution against the frequency variations typically occurring in microgrids. All the harmonic sharing improvements of the control system are tested on a prototype microgrid consisting of two 15 kVA synchronverters and a non-linear load connected via electrical distribution lines.
{"title":"Finite-gain-current repetitive controller for synchronverters with harmonic-sharing capabilities","authors":"J. Roldán-Pérez, M. Prodanović, A. Rodríguez-Cabero, Josep M. Guerrero, A. García-Cerrada","doi":"10.1109/ICHQP.2018.8378881","DOIUrl":"https://doi.org/10.1109/ICHQP.2018.8378881","url":null,"abstract":"Power electronics interfaces are commonly used for renewable energy integration in microgrids and their control as synchronverters represents an alternative to typical control configurations. This control technique introduces many advan tages, but several issues need to be properly addressed including power quality and harmonic current sharing. In this paper, a method to deal with the current harmonics distribution in microgrids based on synchronverters is introduced. A Finite-Gain Repetitive Controller (FRC) is added to the control system of a current-controlled synchronverter. It is shown that the use of this alternative controller allows current harmonics to be shared between the Ditributed Generators (DGs) feeding a non-linear load. In addition, it is shown that the FRC represents a robust solution against the frequency variations typically occurring in microgrids. All the harmonic sharing improvements of the control system are tested on a prototype microgrid consisting of two 15 kVA synchronverters and a non-linear load connected via electrical distribution lines.","PeriodicalId":6506,"journal":{"name":"2018 18th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"18 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2018-05-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86376694","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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