Pub Date : 2019-12-01DOI: 10.1109/psc49016.2019.9081513
A. Lotfy, M. Kaveh, M. Mosavi, Jafar Nooralahi, Ali Noori, Maryam Shabro
{"title":"The 34th International Power System Conference (PSC2019)","authors":"A. Lotfy, M. Kaveh, M. Mosavi, Jafar Nooralahi, Ali Noori, Maryam Shabro","doi":"10.1109/psc49016.2019.9081513","DOIUrl":"https://doi.org/10.1109/psc49016.2019.9081513","url":null,"abstract":"","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127430296","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081556
A. H. Naghshbandy, Arman Ghaderi Baayeh, Ayda Faraji
Geomagnetically induced currents (GICs) in the power system cause half-cycle saturation of the transformers, malfunction of the protective relays, reactive power loss, and voltage instability. A DC Flux Blocker (DFB) that can be installed in series with the power system transformers tertiary windings to neutralize magnetomotive force (mmf) due to GIC is described. The device consists of two circuit breakers and a low power and high current voltage source, which provides the mmf of the GIC DC flux blocking function. The effectiveness of the proposed protective electrical device investigated and validated using the MATLAB software tool. The proposed method can effectively remove the flux due to GIC in both transformers and autotransformers that have tertiary windings. Since the proposed method does not alter the power system topology, it therefore has no effect on protection schemes.
{"title":"Blocking DC Flux due to Geomagnetically Induced Currents in the Power Network Transformers","authors":"A. H. Naghshbandy, Arman Ghaderi Baayeh, Ayda Faraji","doi":"10.1109/PSC49016.2019.9081556","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081556","url":null,"abstract":"Geomagnetically induced currents (GICs) in the power system cause half-cycle saturation of the transformers, malfunction of the protective relays, reactive power loss, and voltage instability. A DC Flux Blocker (DFB) that can be installed in series with the power system transformers tertiary windings to neutralize magnetomotive force (mmf) due to GIC is described. The device consists of two circuit breakers and a low power and high current voltage source, which provides the mmf of the GIC DC flux blocking function. The effectiveness of the proposed protective electrical device investigated and validated using the MATLAB software tool. The proposed method can effectively remove the flux due to GIC in both transformers and autotransformers that have tertiary windings. Since the proposed method does not alter the power system topology, it therefore has no effect on protection schemes.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128832740","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081487
H. Keshtkar, H. A. Zarchi
This paper proposes a multi-objective optimized design procedure for Dual Stator Winding Induction Generators (DSWIGs) applied for wind energy harvesting. The proposed design procedure concentrates on efficiency optimization as well as the power density optimization of a 15kW DSWIG. In this regard, the optimization problem is formulated based on the DSWIG geometry, magnetic and electric equations, first. Then the multi-objective optimization is fulfilled implementing the Genetic Algorithm (GA), which has numerous advantages in comparison with other evolutionary algorithms. A novel fitness function is introduced which determines the priority of the objective functions depending on the expected terms. The proposed fitness function, includes two variables that are weighted by $a$ and $b$ coefficients. Increasing each of these coefficients toward each other, further improvement is achieved. Now by plotting the objective function variations toward different amounts of a/b ratio, according to the application requirements and the desired objectives, the best a/b ratio is selected. Finally, optimization results are evaluated through the two-dimensional finite element based method simulation in ANSYS/MAXWELL environment. The simulation results confirm the effectiveness of the proposed optimization procedure.
{"title":"Multi-objective Optimal Design of Dual Stator Winding Induction Generators Based on Genetic Algorithm and Finite Element Analysis","authors":"H. Keshtkar, H. A. Zarchi","doi":"10.1109/PSC49016.2019.9081487","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081487","url":null,"abstract":"This paper proposes a multi-objective optimized design procedure for Dual Stator Winding Induction Generators (DSWIGs) applied for wind energy harvesting. The proposed design procedure concentrates on efficiency optimization as well as the power density optimization of a 15kW DSWIG. In this regard, the optimization problem is formulated based on the DSWIG geometry, magnetic and electric equations, first. Then the multi-objective optimization is fulfilled implementing the Genetic Algorithm (GA), which has numerous advantages in comparison with other evolutionary algorithms. A novel fitness function is introduced which determines the priority of the objective functions depending on the expected terms. The proposed fitness function, includes two variables that are weighted by $a$ and $b$ coefficients. Increasing each of these coefficients toward each other, further improvement is achieved. Now by plotting the objective function variations toward different amounts of a/b ratio, according to the application requirements and the desired objectives, the best a/b ratio is selected. Finally, optimization results are evaluated through the two-dimensional finite element based method simulation in ANSYS/MAXWELL environment. The simulation results confirm the effectiveness of the proposed optimization procedure.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127986872","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081484
S. Seyedalipour
A modified passivity-based control technique for three-phase multilevel uninterruptible power supply (UPS) inverters is suggested in this paper. The suggested control technique is according to energy shaping and damping injection that is accomplished in order to regulate the energy flow of the UPS inverter to a preferred level and also guarantee global asymptotic stability. It has been proven that the classical passivity-based controller causes a globally stability in company with steady-state errors of the output voltage, which happen because of the nonattendance of voltage loops in the control inputs. Thus, this control scheme is developed via adding output voltage loops. The considered loops remove the steady-state error of the output voltage without eradicating the system stability. The steady-state and transient operation of the three-phase three-level UPS inverter with the suggested control technique has been confirmed through the simulation results in the presence of resistive and diode bridge rectifier loads.
{"title":"Modified Passivity-Based Control Technique of Three-Phase Multilevel Inverters for Uninterruptible Power Supply Applications","authors":"S. Seyedalipour","doi":"10.1109/PSC49016.2019.9081484","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081484","url":null,"abstract":"A modified passivity-based control technique for three-phase multilevel uninterruptible power supply (UPS) inverters is suggested in this paper. The suggested control technique is according to energy shaping and damping injection that is accomplished in order to regulate the energy flow of the UPS inverter to a preferred level and also guarantee global asymptotic stability. It has been proven that the classical passivity-based controller causes a globally stability in company with steady-state errors of the output voltage, which happen because of the nonattendance of voltage loops in the control inputs. Thus, this control scheme is developed via adding output voltage loops. The considered loops remove the steady-state error of the output voltage without eradicating the system stability. The steady-state and transient operation of the three-phase three-level UPS inverter with the suggested control technique has been confirmed through the simulation results in the presence of resistive and diode bridge rectifier loads.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130130510","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081446
A.R. Malekpour, H. Torkaman, M. Toulabi
In this paper, a quasi-three-level asymmetric neutral point diode clamped (NPC) converter is presented with decrease in the number of switches. The conventional asymmetric three-level NPC converter for a three-phase motor has four switches per phase and totally includes twelve switches. The proposed converter reduces the number of switches by half. Three switches are commonly used for all phases and one switch is added per each phase. So, this converter can be called $mathrm{n}+3$ switches converter that n is the number of motor phases. The nominal values of the switches in the proposed converter are equal to the conventional type. So, the total cost of switches will be reduced by half. Also, the proposed converter losses are compared with conventional converter. Because of less switches, the switching losses reduced in the proposed converter. Finally, a multi-level hysteresis control method has been proposed for controlling this converter and it is compared with the conventional prediction control method. Using the hysteresis method reduces the response time and cost of implementation.
{"title":"A Quasi-Three-level Asymmetric NPC Converter with less Switches for Switched Reluctance Motor Drives Cost Reduction","authors":"A.R. Malekpour, H. Torkaman, M. Toulabi","doi":"10.1109/PSC49016.2019.9081446","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081446","url":null,"abstract":"In this paper, a quasi-three-level asymmetric neutral point diode clamped (NPC) converter is presented with decrease in the number of switches. The conventional asymmetric three-level NPC converter for a three-phase motor has four switches per phase and totally includes twelve switches. The proposed converter reduces the number of switches by half. Three switches are commonly used for all phases and one switch is added per each phase. So, this converter can be called $mathrm{n}+3$ switches converter that n is the number of motor phases. The nominal values of the switches in the proposed converter are equal to the conventional type. So, the total cost of switches will be reduced by half. Also, the proposed converter losses are compared with conventional converter. Because of less switches, the switching losses reduced in the proposed converter. Finally, a multi-level hysteresis control method has been proposed for controlling this converter and it is compared with the conventional prediction control method. Using the hysteresis method reduces the response time and cost of implementation.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129423180","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081524
Saman Rezazade, M. Salehi, Mahmudreza Changizian, E. Afjei
Nowadays, to overcome power quality and power factor problems at AC input mains of power systems, various active (Power Factor Correction) PFC techniques are widely employed which utilize switch-mode converters and controller circuits to achieve the aims. Amongst them, in this paper, PFC-based zeta converter and single-phase PWM-rectifier are designated as efficient PFC circuitry to mitigate the Total Harmonic Distortion (THD) and also increase Power Factor (PF). This paper focuses on control and design, analysis, and performance evaluation of each PFC topology separately in the presence of brushless DC motor. The design complexity and number of element required in the PFC circuits are contributing factors to be regarded. Since, the larger these quantities are, the more destructive impact they have on the system reliability and expense. In this regard, this letter, compares the designed PFC-based zeta converter and single-phase PWM-rectifier in terms of their performance, application, design complexity and the number of required elements. The proposed PFC converter topologies are modeled and simulated in Matlab-Simulink environment and then are evaluated through some case studies.
{"title":"Analysis of PFC Improvement and THD Reduction Achieved by PFC-based Zeta Converter and PWM-Rectifier","authors":"Saman Rezazade, M. Salehi, Mahmudreza Changizian, E. Afjei","doi":"10.1109/PSC49016.2019.9081524","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081524","url":null,"abstract":"Nowadays, to overcome power quality and power factor problems at AC input mains of power systems, various active (Power Factor Correction) PFC techniques are widely employed which utilize switch-mode converters and controller circuits to achieve the aims. Amongst them, in this paper, PFC-based zeta converter and single-phase PWM-rectifier are designated as efficient PFC circuitry to mitigate the Total Harmonic Distortion (THD) and also increase Power Factor (PF). This paper focuses on control and design, analysis, and performance evaluation of each PFC topology separately in the presence of brushless DC motor. The design complexity and number of element required in the PFC circuits are contributing factors to be regarded. Since, the larger these quantities are, the more destructive impact they have on the system reliability and expense. In this regard, this letter, compares the designed PFC-based zeta converter and single-phase PWM-rectifier in terms of their performance, application, design complexity and the number of required elements. The proposed PFC converter topologies are modeled and simulated in Matlab-Simulink environment and then are evaluated through some case studies.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"62 35","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"113937356","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081504
A. Rahimi, K. Kanzi
In this paper, a physics-based analytical method is proposed in order to model the frequency behavior of laminated iron-core AC motors. The proposed model consists of frequency-dependent lumped circuit parameters representing two parts; Iron core and stator winding. These frequency-dependent components represent the skin effect and proximity effect in conductors and eddy-currents effect in the core. The total parasitic capacitance is considered to be frequency independent and estimated from impedance characteristics. The proposed method can be used in modeling various high-frequency issues such as electromagnetic interference (EMI), common-mode bearing currents, and long cable effects on motor terminals. Equivalent AC resistance and AC inductance of a Permanent Magnet Synchronous Motor (PMSM) calculated with the proposed method is compared with the Finite Element Method (FEM) results and shows a good agreement. Finally, the Impedance characteristic of the PMSM motor calculated using the proposed method is verified by the measurement data.
{"title":"High-Frequency Physics-Based Analytical Modeling of Permanent Magnet Synchronous Motor","authors":"A. Rahimi, K. Kanzi","doi":"10.1109/PSC49016.2019.9081504","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081504","url":null,"abstract":"In this paper, a physics-based analytical method is proposed in order to model the frequency behavior of laminated iron-core AC motors. The proposed model consists of frequency-dependent lumped circuit parameters representing two parts; Iron core and stator winding. These frequency-dependent components represent the skin effect and proximity effect in conductors and eddy-currents effect in the core. The total parasitic capacitance is considered to be frequency independent and estimated from impedance characteristics. The proposed method can be used in modeling various high-frequency issues such as electromagnetic interference (EMI), common-mode bearing currents, and long cable effects on motor terminals. Equivalent AC resistance and AC inductance of a Permanent Magnet Synchronous Motor (PMSM) calculated with the proposed method is compared with the Finite Element Method (FEM) results and shows a good agreement. Finally, the Impedance characteristic of the PMSM motor calculated using the proposed method is verified by the measurement data.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127540417","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081494
Abolfazl Babaei, Arman Najafizadeh, Iman Kaffashan, H. Rezaei
In this paper an optimized way of failure rate and mean time between failure evaluation can be used in the multilevel inverters is proposed. Actually, There are two main references, MIL-HDBK and IEC handbook, used for failure rate calculation. Considering this, lots of literatures used to use MIL-HDBK for failure rate analysis. However, According to the comparison having been done in this paper, some effective parameters are not considered in the MIL-HDBK standard, and these parameters are included environmental conditions, package type and operation time. Therefore, the calculation results of the failure rate and MTBF based on MIL-HDBK are not accurate. In this paper, an improved method in which the most important parameters effective on the failure rate and MTBF are considered by considering the IEC handbook as the main standard for calculation. Because of this point that the IEC handbook standard considers environmental conditions, package type and operation time for each component, the calculation results based on the standard are more precise than MLL-HDBK one. Apart from that, for calculation of the either conduction loss or switching loss, a precise method is used because most of the published papers used a conventional method for power calculations, and that is why temperature and failure rate calculations in those papers are not accurate enough to be able to calculate junction temperature, failure rate, and MTBF correctly. Eventually, the presented method is evaluated by a five-level NPC simulation in the PLECS software. Finally, theoretical and simulation results of the conduction and switching losses are very close to each other.
{"title":"A Corrected method for Calculation of Failure Rate Based on IEC-TR-62380","authors":"Abolfazl Babaei, Arman Najafizadeh, Iman Kaffashan, H. Rezaei","doi":"10.1109/PSC49016.2019.9081494","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081494","url":null,"abstract":"In this paper an optimized way of failure rate and mean time between failure evaluation can be used in the multilevel inverters is proposed. Actually, There are two main references, MIL-HDBK and IEC handbook, used for failure rate calculation. Considering this, lots of literatures used to use MIL-HDBK for failure rate analysis. However, According to the comparison having been done in this paper, some effective parameters are not considered in the MIL-HDBK standard, and these parameters are included environmental conditions, package type and operation time. Therefore, the calculation results of the failure rate and MTBF based on MIL-HDBK are not accurate. In this paper, an improved method in which the most important parameters effective on the failure rate and MTBF are considered by considering the IEC handbook as the main standard for calculation. Because of this point that the IEC handbook standard considers environmental conditions, package type and operation time for each component, the calculation results based on the standard are more precise than MLL-HDBK one. Apart from that, for calculation of the either conduction loss or switching loss, a precise method is used because most of the published papers used a conventional method for power calculations, and that is why temperature and failure rate calculations in those papers are not accurate enough to be able to calculate junction temperature, failure rate, and MTBF correctly. Eventually, the presented method is evaluated by a five-level NPC simulation in the PLECS software. Finally, theoretical and simulation results of the conduction and switching losses are very close to each other.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126894228","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081451
M. Saidabadi, M. Abedi, H. Nafisi, A. Khorsandi
The characteristics of fuel cell (FC) power generating system are basically different from the conventional synchronous generator. Their dynamic behavior is subjected by the specification of power conditioner and they do not have inertia. Therefore, it is important to investigate the effect of using solid oxide fuel cell (SOFC) generation on the power system dynamic performance. This paper surveys the impact of SOFC generation on the power system small signal stability in the presence of conventional generation units along with power system stabilizers (PSSs). Eigenvalue analysis and particle swarm optimization (PSO) algorithm are applied to tune the PSS parameters of conventional generator, power conditioner parameters of FC and power output of SOFC simultaneously in order to increase the small signal stability of power system.
{"title":"Small signal stability improvement via coordination of PSS's and SOFC power conditioner by PSO algorithm","authors":"M. Saidabadi, M. Abedi, H. Nafisi, A. Khorsandi","doi":"10.1109/PSC49016.2019.9081451","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081451","url":null,"abstract":"The characteristics of fuel cell (FC) power generating system are basically different from the conventional synchronous generator. Their dynamic behavior is subjected by the specification of power conditioner and they do not have inertia. Therefore, it is important to investigate the effect of using solid oxide fuel cell (SOFC) generation on the power system dynamic performance. This paper surveys the impact of SOFC generation on the power system small signal stability in the presence of conventional generation units along with power system stabilizers (PSSs). Eigenvalue analysis and particle swarm optimization (PSO) algorithm are applied to tune the PSS parameters of conventional generator, power conditioner parameters of FC and power output of SOFC simultaneously in order to increase the small signal stability of power system.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"110 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114757589","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 : 2019-12-01DOI: 10.1109/PSC49016.2019.9081503
Seyed Hamid Khalkhali, A. Safikhani
Partial Discharge (PD) activities cause degradation of transformer insulation, which results in long-term failure. Therefore, it is important to detect and locate PD. One of the methods of localization PD in the UHF technique is to use Time Difference Of Arrival (TDOA) method. One of the methods to determine the signal arrival at TDOA is to use the first peak time delay so the measured time delay must be accurate to minimize the localization error. In this paper, we first consider the origin of the time delay of the first peak of PD signal, i.e. the effect of the radiation from the PD source on the measurement point, reflection from other points to the measurement point, and the conduction through the conductive. Then, by simply modeling part of a winding in CST Microwave Studio software, we compare the time delay of the signal peaks with the calculation results. In addition, by analyzing the radiation pattern of the winding and the PD source, we separate the conductive and radiation part. This separation helps determine our UHF sensor installation point.
{"title":"Separation of Conductive and Radiation part of Partial Discharge Signal Using Time Delay in Transformer Winding","authors":"Seyed Hamid Khalkhali, A. Safikhani","doi":"10.1109/PSC49016.2019.9081503","DOIUrl":"https://doi.org/10.1109/PSC49016.2019.9081503","url":null,"abstract":"Partial Discharge (PD) activities cause degradation of transformer insulation, which results in long-term failure. Therefore, it is important to detect and locate PD. One of the methods of localization PD in the UHF technique is to use Time Difference Of Arrival (TDOA) method. One of the methods to determine the signal arrival at TDOA is to use the first peak time delay so the measured time delay must be accurate to minimize the localization error. In this paper, we first consider the origin of the time delay of the first peak of PD signal, i.e. the effect of the radiation from the PD source on the measurement point, reflection from other points to the measurement point, and the conduction through the conductive. Then, by simply modeling part of a winding in CST Microwave Studio software, we compare the time delay of the signal peaks with the calculation results. In addition, by analyzing the radiation pattern of the winding and the PD source, we separate the conductive and radiation part. This separation helps determine our UHF sensor installation point.","PeriodicalId":359817,"journal":{"name":"2019 International Power System Conference (PSC)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129869631","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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