Pub Date : 2014-05-25DOI: 10.1109/ICHQP.2014.6842909
P. M. de Almeida, P. G. Barbosa, P. Ribeiro
This paper presents the modeling and simulation of a subsynchronous resonance using Simscape in a multi-physical environment. It is shown that through this new modeling approach it is possible to visualize and better understand how the mechanical and electrical systems interact with each other during a subsynchronous resonance. The use of multi-physical domain simulation allows engineers and designers to comprehend sophisticated and complex systems with interactions among several physical domains. It also helps to find flaws and foresee potential interaction problems. A subsyncronous resonance case is used as an example to demonstrate the utility of the tool.
{"title":"Multi-physical modeling: An integrated way of understanding the dynamics of electric grids","authors":"P. M. de Almeida, P. G. Barbosa, P. Ribeiro","doi":"10.1109/ICHQP.2014.6842909","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842909","url":null,"abstract":"This paper presents the modeling and simulation of a subsynchronous resonance using Simscape in a multi-physical environment. It is shown that through this new modeling approach it is possible to visualize and better understand how the mechanical and electrical systems interact with each other during a subsynchronous resonance. The use of multi-physical domain simulation allows engineers and designers to comprehend sophisticated and complex systems with interactions among several physical domains. It also helps to find flaws and foresee potential interaction problems. A subsyncronous resonance case is used as an example to demonstrate the utility of the tool.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121917588","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842745
A. Lazkano, K. Redondo, J. Gutiérrez, P. Sáiz, L. Leturiondo, I. Azkarate
This paper presents a comparative study of the method used for measuring the flicker emission from wind turbines as currently defined in standard IEC 61400-21 and the new proposal included in the draft version of the revised standard. The new procedure applies a different arrangement scheme to the flicker measurements, and simplifies the statistical analysis to obtain the final flicker coefficients. The study performs a comparison based on data from a wind turbine measuring campaign. The results from both methods are discussed, and the proper statistical analysis is determined. The comparison shows that it is possible to simplify the flicker's statistical evaluation and obtain flicker coefficients that are consistent with the results from the standard in force. The study points out the research challenges in the validation of the assessment method that is required to comply with the technical regulations and grid codes.
{"title":"Revision of the standard method for statistical evaluation of flicker coefficients in wind turbines","authors":"A. Lazkano, K. Redondo, J. Gutiérrez, P. Sáiz, L. Leturiondo, I. Azkarate","doi":"10.1109/ICHQP.2014.6842745","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842745","url":null,"abstract":"This paper presents a comparative study of the method used for measuring the flicker emission from wind turbines as currently defined in standard IEC 61400-21 and the new proposal included in the draft version of the revised standard. The new procedure applies a different arrangement scheme to the flicker measurements, and simplifies the statistical analysis to obtain the final flicker coefficients. The study performs a comparison based on data from a wind turbine measuring campaign. The results from both methods are discussed, and the proper statistical analysis is determined. The comparison shows that it is possible to simplify the flicker's statistical evaluation and obtain flicker coefficients that are consistent with the results from the standard in force. The study points out the research challenges in the validation of the assessment method that is required to comply with the technical regulations and grid codes.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117262115","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842780
E. Larsson, M. Wahlberg, M. Bollen
To save energy, many new buildings have modern energy saving lighting installed. In large department or grocery stores the use of fluorescent lamps powered by high frequency electronic ballast is common. There are however consistent reports of large numbers of failures of the electronic ballast of these lamps. The failures of the electronic ballast are due to high temperature or bad power quality. But neither of these reasons has been confirmed as the cause. This paper discusses in general the lifetime of electronic ballast. The paper also presents detailed analysis of results from measurement performed in a grocery store where high instances of failure have been observed. Both temperature and power quality in the harmonic range and 2 to 150 kHz have been included in the measurements.
{"title":"Reduced life-time of lamps: Temperature rise and bad power quality","authors":"E. Larsson, M. Wahlberg, M. Bollen","doi":"10.1109/ICHQP.2014.6842780","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842780","url":null,"abstract":"To save energy, many new buildings have modern energy saving lighting installed. In large department or grocery stores the use of fluorescent lamps powered by high frequency electronic ballast is common. There are however consistent reports of large numbers of failures of the electronic ballast of these lamps. The failures of the electronic ballast are due to high temperature or bad power quality. But neither of these reasons has been confirmed as the cause. This paper discusses in general the lifetime of electronic ballast. The paper also presents detailed analysis of results from measurement performed in a grocery store where high instances of failure have been observed. Both temperature and power quality in the harmonic range and 2 to 150 kHz have been included in the measurements.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"71 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115970646","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842820
P. Nicolae, Lucian-Dinuţ Popa, M. Nicolae, D. Stănescu, I. Nicolae
This paper presents a comparison of the performances related to compensation and transient response of active and passive power filters when operation relies on distorted mains voltages. MATLAB/Simulink models are used. Measurements acquired with a dedicated data acquisition system provided the parameters required by the real system simulation, namely a static excitation system of a power generator group. The simulated system consists of a transformer which feeds a controlled rectifier bridge. Replacing the old auxiliary excitation generator raises two important problems: the line voltage notching due to thyristors switching and additional line current distortion. Theoretical aspects of line notching and passive and active solutions for compensation and their limitations are also discussed.
{"title":"Performance comparison between active and passive power filters for a static excitation system in a power generator group: A MATLAB/Simulink approach","authors":"P. Nicolae, Lucian-Dinuţ Popa, M. Nicolae, D. Stănescu, I. Nicolae","doi":"10.1109/ICHQP.2014.6842820","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842820","url":null,"abstract":"This paper presents a comparison of the performances related to compensation and transient response of active and passive power filters when operation relies on distorted mains voltages. MATLAB/Simulink models are used. Measurements acquired with a dedicated data acquisition system provided the parameters required by the real system simulation, namely a static excitation system of a power generator group. The simulated system consists of a transformer which feeds a controlled rectifier bridge. Replacing the old auxiliary excitation generator raises two important problems: the line voltage notching due to thyristors switching and additional line current distortion. Theoretical aspects of line notching and passive and active solutions for compensation and their limitations are also discussed.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116099368","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842831
K. Jagieła, J. Rak, M. Gała, M. Kepinski
The paper deals with analysis of losses and load-carrying capacity indices for transformers in industrial power stations that supply nonlinear loads taking non-sinusoidal current. Waveforms of voltages and currents measured in an AC arc furnace system are presented. They are used to determine harmonic spectra of phase currents in the transformer's secondary circuit and time variations of load-carrying capacity indices K, FHL and imax over a whole steel cast cycle. The dependencies of K and imax on the harmonics content THDI are presented for a representative steel cast cycle and their polynomial approximations are calculated.
{"title":"Variation of load-carrying capacity indices of an AC Arc furnace network transformer","authors":"K. Jagieła, J. Rak, M. Gała, M. Kepinski","doi":"10.1109/ICHQP.2014.6842831","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842831","url":null,"abstract":"The paper deals with analysis of losses and load-carrying capacity indices for transformers in industrial power stations that supply nonlinear loads taking non-sinusoidal current. Waveforms of voltages and currents measured in an AC arc furnace system are presented. They are used to determine harmonic spectra of phase currents in the transformer's secondary circuit and time variations of load-carrying capacity indices K, FHL and imax over a whole steel cast cycle. The dependencies of K and imax on the harmonics content THDI are presented for a representative steel cast cycle and their polynomial approximations are calculated.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"107 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124798722","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842877
S. Said, M. Aly, M. Abdel-Akher
This paper presents the impacts superconducting magnetic energy storage (SMES) in suppressing the voltage sag/swell in distribution systems with wind power penetration. Wind turbine used in this paper is of squirrel cage induction generator (SCIG) with shunt connected capacitor bank to improve the power factor. SMES system consists of step down transformer, power conditioning system, DC-DC chopper, and large inductance superconducting coil. Wind energy generation system (WEGS) and SMES system connected to the grid at the same bus to achieve high performance. Fuzzy logic controller (FLC) used for DC-DC chopper to control in power transfer between the grid and SMES coil. The FLC is designed so that the SMES can absorb/deliver active power from/to the distribution system. On the other hand, reactive power can be delivered/absorbed to/from the distribution system according to the voltage difference between the SMES voltage and DC link voltage. Two inputs were applied to the FLC; bus voltage and SMES current variations. This technique of two inputs was proved to enhance the control performance. Detailed simulation is carried out using Matlab/Simulink and Simpowersystem package.
{"title":"Application of superconducting magnetic energy storage (SMES) for voltage sag/swell supression in distribution system with wind power penetration","authors":"S. Said, M. Aly, M. Abdel-Akher","doi":"10.1109/ICHQP.2014.6842877","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842877","url":null,"abstract":"This paper presents the impacts superconducting magnetic energy storage (SMES) in suppressing the voltage sag/swell in distribution systems with wind power penetration. Wind turbine used in this paper is of squirrel cage induction generator (SCIG) with shunt connected capacitor bank to improve the power factor. SMES system consists of step down transformer, power conditioning system, DC-DC chopper, and large inductance superconducting coil. Wind energy generation system (WEGS) and SMES system connected to the grid at the same bus to achieve high performance. Fuzzy logic controller (FLC) used for DC-DC chopper to control in power transfer between the grid and SMES coil. The FLC is designed so that the SMES can absorb/deliver active power from/to the distribution system. On the other hand, reactive power can be delivered/absorbed to/from the distribution system according to the voltage difference between the SMES voltage and DC link voltage. Two inputs were applied to the FLC; bus voltage and SMES current variations. This technique of two inputs was proved to enhance the control performance. Detailed simulation is carried out using Matlab/Simulink and Simpowersystem package.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121894834","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842823
W. C. G. A. Martins, A. A. Oliveira, A. F. da Costa, B. M. Gianesini, V. Brito, M. S. Quinalia, R. M. Martins
This paper aims to present a comparative analysis of a computationally implemented model of an Unified Power Flow Controller (UPFC) and an ASC (Advanced Series Compensator) through case studies. To do so, a description its principle of operation and mathematical modeling, comprehending the series and parallel compensators, is given so that the control objectives can be determined using the vector theory.
{"title":"Unified power flow controller performance","authors":"W. C. G. A. Martins, A. A. Oliveira, A. F. da Costa, B. M. Gianesini, V. Brito, M. S. Quinalia, R. M. Martins","doi":"10.1109/ICHQP.2014.6842823","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842823","url":null,"abstract":"This paper aims to present a comparative analysis of a computationally implemented model of an Unified Power Flow Controller (UPFC) and an ASC (Advanced Series Compensator) through case studies. To do so, a description its principle of operation and mathematical modeling, comprehending the series and parallel compensators, is given so that the control objectives can be determined using the vector theory.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130244823","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842871
Jan Meyer, M. Bollen, H. Amaris, A. Blanco, Aurora Gil de Castro, J. Desmet, M. Klatt, Ł. Kocewiak, S. Rönnberg, Kai-Tsang Yang
A workshop on power system harmonics was organized in Stockholm in January 2014. On the agenda was among others a discussion on what are the main issues on harmonics at the moment and in the near future. Some of the issues discussed at that workshop are presented in this paper and its companion paper. In this paper the following issues will be addressed: the appearance of emission at higher frequencies (supraharmonics); the need for new and improved standards; measurement issues and data analysis.
{"title":"Future work on harmonics - some expert opinions Part II - supraharmonics, standards and measurements","authors":"Jan Meyer, M. Bollen, H. Amaris, A. Blanco, Aurora Gil de Castro, J. Desmet, M. Klatt, Ł. Kocewiak, S. Rönnberg, Kai-Tsang Yang","doi":"10.1109/ICHQP.2014.6842871","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842871","url":null,"abstract":"A workshop on power system harmonics was organized in Stockholm in January 2014. On the agenda was among others a discussion on what are the main issues on harmonics at the moment and in the near future. Some of the issues discussed at that workshop are presented in this paper and its companion paper. In this paper the following issues will be addressed: the appearance of emission at higher frequencies (supraharmonics); the need for new and improved standards; measurement issues and data analysis.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128820957","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842852
N. Zamanan, J. Sykulski
There is an increasing demand for more detailed and accurate modeling techniques for predicting transient response of power systems caused in particular by high impedance arcing faults (HIF). This is particularly so in relation to the design and development of improved equipment and new protection techniques. Accurate prediction of fault transients requires detailed and comprehensive representation of all components in a system, while the transient studies need to be conducted into the frequency range well above the normal power frequency. The HIF is a very complex phenomenon and exhibits highly nonlinear behavior. The most distinctive characteristics are nonlinearity and asymmetry. The nonlinearity arises from the fact that the voltage-current characteristic curve of the HIF is itself nonlinear. It is also observed that the fault current has different waveforms for positive and negative half cycles, which is called asymmetry. The nonlinearity and asymmetry exist in every cycle after the HIF. In order to obtain a good representation of a HIF, it is necessary to develop a model that gives the above mentioned characteristics, as well as the harmonic content of the HIF. This paper introduce a new HIF model, it also reviews and summarizes some of the methods for modeling high impedance faults and the developments which led to them.
{"title":"The evolution of high impedance fault modeling","authors":"N. Zamanan, J. Sykulski","doi":"10.1109/ICHQP.2014.6842852","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842852","url":null,"abstract":"There is an increasing demand for more detailed and accurate modeling techniques for predicting transient response of power systems caused in particular by high impedance arcing faults (HIF). This is particularly so in relation to the design and development of improved equipment and new protection techniques. Accurate prediction of fault transients requires detailed and comprehensive representation of all components in a system, while the transient studies need to be conducted into the frequency range well above the normal power frequency. The HIF is a very complex phenomenon and exhibits highly nonlinear behavior. The most distinctive characteristics are nonlinearity and asymmetry. The nonlinearity arises from the fact that the voltage-current characteristic curve of the HIF is itself nonlinear. It is also observed that the fault current has different waveforms for positive and negative half cycles, which is called asymmetry. The nonlinearity and asymmetry exist in every cycle after the HIF. In order to obtain a good representation of a HIF, it is necessary to develop a model that gives the above mentioned characteristics, as well as the harmonic content of the HIF. This paper introduce a new HIF model, it also reviews and summarizes some of the methods for modeling high impedance faults and the developments which led to them.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127746209","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 : 2014-05-25DOI: 10.1109/ICHQP.2014.6842756
G. Chang, R. Hong, H. Su
This paper presents a study of applying the equivalent effective voltage concept according to IEEE Standard 1459-2010 for determining reference compensation currents of the three-phase three-wire shunt active power filter in the a-b-c reference frame. The APF reference current calculator is developed and is realized on the DSP board through processor-in-the-loop simulation for validating the effectiveness of the proposed APF control strategy.
{"title":"IEEE standard 1459-based reference compensation current strategy for three-phase three-wire shunt active power filter control","authors":"G. Chang, R. Hong, H. Su","doi":"10.1109/ICHQP.2014.6842756","DOIUrl":"https://doi.org/10.1109/ICHQP.2014.6842756","url":null,"abstract":"This paper presents a study of applying the equivalent effective voltage concept according to IEEE Standard 1459-2010 for determining reference compensation currents of the three-phase three-wire shunt active power filter in the a-b-c reference frame. The APF reference current calculator is developed and is realized on the DSP board through processor-in-the-loop simulation for validating the effectiveness of the proposed APF control strategy.","PeriodicalId":188461,"journal":{"name":"2014 16th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"33 12","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-05-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113984128","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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