Pub Date : 2020-07-01DOI: 10.1109/ICHQP46026.2020.9177933
J. Drapela, M. Halpin, R. Langella, Jan Meyer, D. Mueller, H. Sharma, A. Testa, N. Watson, D. Zech
This paper reports the issues and challenges behind the proposal to include interharmonic limits in the next revision of the IEEE Standard 519 as discussed within the interharmonic distortion sub-group formed in the framework of the Harmonics WG (519) of the IEEE PES Transmission & Distribution Committee.
{"title":"Issues and Challenges Related to Interharmonic Distortion Limits","authors":"J. Drapela, M. Halpin, R. Langella, Jan Meyer, D. Mueller, H. Sharma, A. Testa, N. Watson, D. Zech","doi":"10.1109/ICHQP46026.2020.9177933","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177933","url":null,"abstract":"This paper reports the issues and challenges behind the proposal to include interharmonic limits in the next revision of the IEEE Standard 519 as discussed within the interharmonic distortion sub-group formed in the framework of the Harmonics WG (519) of the IEEE PES Transmission & Distribution Committee.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"106 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":"121367383","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/ichqp46026.2020.9177923
{"title":"ICHQP 2020 Title Page","authors":"","doi":"10.1109/ichqp46026.2020.9177923","DOIUrl":"https://doi.org/10.1109/ichqp46026.2020.9177923","url":null,"abstract":"","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":"115407378","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/ichqp46026.2020.9177928
G. Singh, Thomas A. Cooke, W. Howe
The penetration of Distributed Energy Resources (DERs) on the power system has come with its own set of problems, especially in the power quality (PQ) domain. Such penetration has led to the re-evaluation of various aspects of distribution PQ. While such a re-evaluation has focused on the emission and compatibility limits, in the light of PQ concerns from inverter interfaced generation, traditional PQ indices themselves have received relatively little attention. This paper highlights one such issue with the measurement of power factor (p.f.). A case study has been presented with measurement data from a residential neighborhood in the United States, which has the capability to island from the grid and operate as a microgrid. The power factor in this case shows significant deviations at various times during the day and night. Upon further investigation, the cause was determined to be PV generation during the day and battery cycling during the night. This paper presents the data from field measurements, the ensuing investigation and the broad conclusions. The paper closes with a discussion of implications of these measurements for utilities and the PQ community, especially with regards to the need for a definition of p.f, that more accurately describes impact of DERs on the grid, given that such situations may recur in the future as DERs and microgrids continue to proliferate.
{"title":"Impact of Microgrids on Power Factor measurements","authors":"G. Singh, Thomas A. Cooke, W. Howe","doi":"10.1109/ichqp46026.2020.9177928","DOIUrl":"https://doi.org/10.1109/ichqp46026.2020.9177928","url":null,"abstract":"The penetration of Distributed Energy Resources (DERs) on the power system has come with its own set of problems, especially in the power quality (PQ) domain. Such penetration has led to the re-evaluation of various aspects of distribution PQ. While such a re-evaluation has focused on the emission and compatibility limits, in the light of PQ concerns from inverter interfaced generation, traditional PQ indices themselves have received relatively little attention. This paper highlights one such issue with the measurement of power factor (p.f.). A case study has been presented with measurement data from a residential neighborhood in the United States, which has the capability to island from the grid and operate as a microgrid. The power factor in this case shows significant deviations at various times during the day and night. Upon further investigation, the cause was determined to be PV generation during the day and battery cycling during the night. This paper presents the data from field measurements, the ensuing investigation and the broad conclusions. The paper closes with a discussion of implications of these measurements for utilities and the PQ community, especially with regards to the need for a definition of p.f, that more accurately describes impact of DERs on the grid, given that such situations may recur in the future as DERs and microgrids continue to proliferate.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"83 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":"116792170","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/ICHQP46026.2020.9177888
V. Khokhlov, Jan Meyer, P. Schegner
Proper stabilisation is one important requirement for the measurement of harmonic emission of electrical appliances. A set of modern household appliances is used to study the change of their electrical and thermal parameters after connection to the power source and the time for their entire stabilisation in a laboratory setup. Based on a novel approach, which is more robust and less time-consuming compared to other approaches, the stabilisation process for different types of appliances is determined. The impact of different test conditions, like the mounting orientation or ambient temperature on the stabilisation time is studied. The results suggest that the stabilisation times should be individually determined for a tested device and the applied test conditions has to be carefully selected to adequately reflect reality.
{"title":"Test Procedure for Determining the Stabilisation Time of Lamps and Other Household Appliances","authors":"V. Khokhlov, Jan Meyer, P. Schegner","doi":"10.1109/ICHQP46026.2020.9177888","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177888","url":null,"abstract":"Proper stabilisation is one important requirement for the measurement of harmonic emission of electrical appliances. A set of modern household appliances is used to study the change of their electrical and thermal parameters after connection to the power source and the time for their entire stabilisation in a laboratory setup. Based on a novel approach, which is more robust and less time-consuming compared to other approaches, the stabilisation process for different types of appliances is determined. The impact of different test conditions, like the mounting orientation or ambient temperature on the stabilisation time is studied. The results suggest that the stabilisation times should be individually determined for a tested device and the applied test conditions has to be carefully selected to adequately reflect reality.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"13 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":"126744705","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/ICHQP46026.2020.9177870
M. Jarkovoi, L. Kütt, M. N. Iqbal
Modeling modern nonlinear loads with varying current poses a significant challenge. While the traditional numeric models provide an adequate representation of stable loads, if a device or a group of devices operate at different modes with varying harmonic currents, a statistical approach is necessary to represent the extent and the shape of the variation. This paper provides an overview of probabilistic modeling methods for harmonic currents and presents a novel method for empirical nonparametric harmonic current modeling.
{"title":"Probabilistic bivariate modeling of harmonic current","authors":"M. Jarkovoi, L. Kütt, M. N. Iqbal","doi":"10.1109/ICHQP46026.2020.9177870","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177870","url":null,"abstract":"Modeling modern nonlinear loads with varying current poses a significant challenge. While the traditional numeric models provide an adequate representation of stable loads, if a device or a group of devices operate at different modes with varying harmonic currents, a statistical approach is necessary to represent the extent and the shape of the variation. This paper provides an overview of probabilistic modeling methods for harmonic currents and presents a novel method for empirical nonparametric harmonic current modeling.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"111 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":"133402550","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/ICHQP46026.2020.9177883
A. Ramirez, G. Lazaroiu, J. Cañedo, M. Roscia
Nonlinear circuits are readily modeled by means of harmonic domain (HD) techniques and their stationary state can easily be calculated by means of well-established techniques. This paper evaluates and compares two distinct types of Jacobians, i.e., numerical and analytical, utilized in stationary calculation of nonlinear networks via the modified harmonic domain (MHD). Convergence properties, computational efficiency, and practical computational implementation topics regarding the two types of Jacobians are presented.
{"title":"Evaluation of Jacobian used in Simulation of Nonlinear Circuits in the Modified Harmonic Domain","authors":"A. Ramirez, G. Lazaroiu, J. Cañedo, M. Roscia","doi":"10.1109/ICHQP46026.2020.9177883","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177883","url":null,"abstract":"Nonlinear circuits are readily modeled by means of harmonic domain (HD) techniques and their stationary state can easily be calculated by means of well-established techniques. This paper evaluates and compares two distinct types of Jacobians, i.e., numerical and analytical, utilized in stationary calculation of nonlinear networks via the modified harmonic domain (MHD). Convergence properties, computational efficiency, and practical computational implementation topics regarding the two types of Jacobians are presented.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"31 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":"115492924","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/ICHQP46026.2020.9177911
Qais Atef Qawaqneh
This study investigates the consequences on the power quality of the distribution power network during several switching scenarios of shunt capacitor banks; at different phase angles, using Vacuum Interrupter Circuit Breaker (VI-CB). Real power quality measurements were recorded at the 11kV side of the main distribution power substations (132/11kV), and due to the unexpected findings, a distinct measurement method has been developed and followed for meeting the need of obtaining a real measurement of Transient Recovery Voltage (TRV) across the opening contact gap of the VI-CB; using a special power quality analyzer, resulted in capturing outstanding findings which seems to counter the scientific documentation found in the relevant literatures which mainly rely on system modeling and simulation results. Focus was also given on harmonic analysis during switching events. Furthermore, Fault Tree Analysis method, used to explain the failure modes and consequences of these power quality disturbances during capacitor bank switching. The conclusion highlights some important factors and results related to the high frequency behavior and amplitude amplifications of both current and voltage during switching events.
{"title":"Impact of 11kV Capacitor Bank Switching at Distribution Power Network from Power Quality Perspective","authors":"Qais Atef Qawaqneh","doi":"10.1109/ICHQP46026.2020.9177911","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177911","url":null,"abstract":"This study investigates the consequences on the power quality of the distribution power network during several switching scenarios of shunt capacitor banks; at different phase angles, using Vacuum Interrupter Circuit Breaker (VI-CB). Real power quality measurements were recorded at the 11kV side of the main distribution power substations (132/11kV), and due to the unexpected findings, a distinct measurement method has been developed and followed for meeting the need of obtaining a real measurement of Transient Recovery Voltage (TRV) across the opening contact gap of the VI-CB; using a special power quality analyzer, resulted in capturing outstanding findings which seems to counter the scientific documentation found in the relevant literatures which mainly rely on system modeling and simulation results. Focus was also given on harmonic analysis during switching events. Furthermore, Fault Tree Analysis method, used to explain the failure modes and consequences of these power quality disturbances during capacitor bank switching. The conclusion highlights some important factors and results related to the high frequency behavior and amplitude amplifications of both current and voltage during switching events.","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":"121410292","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/ICHQP46026.2020.9177891
L. A. D. Costa, Younes Mohammadi, R. Leborgne, D. Gazzana
Neutral-grounding resistors are employed on transmission, distribution and industrial electric power systems to achieve, among other goals, a limited magnitude of the ground-fault current. The impedance connected between a neutral point and the ground influences the total zero-sequence impedance of a system, which impacts voltages during ground faults. Therefore, there is a relation between the grounding scheme and voltage disturbances, like the short-duration rms voltage variations (SDVVs), which include interruptions, sags, and swells. Hence, this paper presents an analytical evaluation of the influence of the neutral-grounding resistance on SDVVs during single-phase-to-ground (LG) and two-phase-to-ground (LLG) faults for an industrial system. It is observed that the influence occurs mainly on phase-to-ground voltages, there being an impact on phase-to-neutral or phase-to-phase ones just for a few values of fault resistance. The results thus indicate better neutral grounding practices for industrial systems and show the best load connections, concerning SDVVs and equipment tripping.
{"title":"Impact Evaluation of the Neutral-Grounding Resistance on Short-Duration RMS Voltage Variations","authors":"L. A. D. Costa, Younes Mohammadi, R. Leborgne, D. Gazzana","doi":"10.1109/ICHQP46026.2020.9177891","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177891","url":null,"abstract":"Neutral-grounding resistors are employed on transmission, distribution and industrial electric power systems to achieve, among other goals, a limited magnitude of the ground-fault current. The impedance connected between a neutral point and the ground influences the total zero-sequence impedance of a system, which impacts voltages during ground faults. Therefore, there is a relation between the grounding scheme and voltage disturbances, like the short-duration rms voltage variations (SDVVs), which include interruptions, sags, and swells. Hence, this paper presents an analytical evaluation of the influence of the neutral-grounding resistance on SDVVs during single-phase-to-ground (LG) and two-phase-to-ground (LLG) faults for an industrial system. It is observed that the influence occurs mainly on phase-to-ground voltages, there being an impact on phase-to-neutral or phase-to-phase ones just for a few values of fault resistance. The results thus indicate better neutral grounding practices for industrial systems and show the best load connections, concerning SDVVs and equipment tripping.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"7 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":"123781222","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/ICHQP46026.2020.9177904
B. Blackstone, Y. Baghzouz
Behind-the-meter battery energy storage systems can reduce the electricity bill for those customers with photovoltaic installations by shifting solar energy from low-cost to high-cost periods in areas that offer Time-of-Use rates. However, this single BES application alone generally results in long and unacceptable period to recover the investment. In order to increase the revenue stream and accelerate the battery’s Net Present Value into positive territory, this paper proposes a second BES service of energy arbitrage that is operated by the local electric utility or aggregator in the regional Energy Imbalance Market (EIM). The proposed method is simple and does not require complicated co-optimization algorithms since the two services are executed in sequence with no time overlap. The approach is illustrated by a case study that utilizes real residential customer load demand, PV power generation, electricity rates and incentives in Southwest US.
{"title":"Value Added Sequential Services for BTM Storage when Paired with PV Systems","authors":"B. Blackstone, Y. Baghzouz","doi":"10.1109/ICHQP46026.2020.9177904","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177904","url":null,"abstract":"Behind-the-meter battery energy storage systems can reduce the electricity bill for those customers with photovoltaic installations by shifting solar energy from low-cost to high-cost periods in areas that offer Time-of-Use rates. However, this single BES application alone generally results in long and unacceptable period to recover the investment. In order to increase the revenue stream and accelerate the battery’s Net Present Value into positive territory, this paper proposes a second BES service of energy arbitrage that is operated by the local electric utility or aggregator in the regional Energy Imbalance Market (EIM). The proposed method is simple and does not require complicated co-optimization algorithms since the two services are executed in sequence with no time overlap. The approach is illustrated by a case study that utilizes real residential customer load demand, PV power generation, electricity rates and incentives in Southwest US.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"3 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":"129079048","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/ICHQP46026.2020.9177913
G. Singh, Carl H. Miller, W. Howe
With the recent advent of inverter interfaced Distributed Energy Resources (DER) and end use loads employing power electronic circuits, power system harmonics are once again receiving attention as utilities integrate these resources in to their power grid. With the increased focus on DERs and new consumer electronic loads, one aspect that often gets ignored is the economic impact of harmonic emission from such energy sources and loads. This paper is part of a first attempt to bridge this gap in knowledge. Based upon previous research, a new ‘harmonic losses calculator’ was developed. This calculator quantifies losses due to the flow of harmonic currents on a distribution circuit and assigns a dollar value to them. Coupling this tool with the pre-existing ‘Harmonic Evaluation Module’, a new framework is proposed in which the economic impact of non-linear load or DER penetration can be accurately determined. The objective behind such an exercise is to enable utilities to evaluate the impact of harmonic load or savings due to DER penetration, at the planning stage. The framework is demonstrated by showing the impact of penetration of harmonic load and DER on two known distribution circuits, in the OpenDSS simulation framework. This is followed by a discussion of the change in operating costs of the feeder due to such load or generation. The paper closes with a discussion of the anticipated future research and expected capabilities to be added to this framework.
{"title":"A Framework for Evaluating Harmonic Losses in Distribution Planning","authors":"G. Singh, Carl H. Miller, W. Howe","doi":"10.1109/ICHQP46026.2020.9177913","DOIUrl":"https://doi.org/10.1109/ICHQP46026.2020.9177913","url":null,"abstract":"With the recent advent of inverter interfaced Distributed Energy Resources (DER) and end use loads employing power electronic circuits, power system harmonics are once again receiving attention as utilities integrate these resources in to their power grid. With the increased focus on DERs and new consumer electronic loads, one aspect that often gets ignored is the economic impact of harmonic emission from such energy sources and loads. This paper is part of a first attempt to bridge this gap in knowledge. Based upon previous research, a new ‘harmonic losses calculator’ was developed. This calculator quantifies losses due to the flow of harmonic currents on a distribution circuit and assigns a dollar value to them. Coupling this tool with the pre-existing ‘Harmonic Evaluation Module’, a new framework is proposed in which the economic impact of non-linear load or DER penetration can be accurately determined. The objective behind such an exercise is to enable utilities to evaluate the impact of harmonic load or savings due to DER penetration, at the planning stage. The framework is demonstrated by showing the impact of penetration of harmonic load and DER on two known distribution circuits, in the OpenDSS simulation framework. This is followed by a discussion of the change in operating costs of the feeder due to such load or generation. The paper closes with a discussion of the anticipated future research and expected capabilities to be added to this framework.","PeriodicalId":436720,"journal":{"name":"2020 19th International Conference on Harmonics and Quality of Power (ICHQP)","volume":"74 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":"128801565","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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