Pub Date : 2018-10-01DOI: 10.1109/EPEC.2018.8598323
A. Delavari, P. Brunelle, I. Kamwa
This paper introduces real-time modeling and simulation of the reactive and active power control of Neutral-Point Clamped (NPC) multilevel Voltage Source Inverter (VSI). A decoupled control scheme has been implemented based on the current at the terminal of the VSI. The simulation is performed on OPAL-RT and Speedgoat digital simulators. Further, full closed-loop models are evaluated in an experimental benchmark for the step response of active and reactive power (P and Q) changes. The real-time modeling and prototyping shows the capability of fully closed-loop control to develop and validate actual power electronic devices implemented on the power networks.
{"title":"Real-time Closed-loop PQ Control of NPC Multi-level Converter Using OPAL-RT and Speedgoat Simulators","authors":"A. Delavari, P. Brunelle, I. Kamwa","doi":"10.1109/EPEC.2018.8598323","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598323","url":null,"abstract":"This paper introduces real-time modeling and simulation of the reactive and active power control of Neutral-Point Clamped (NPC) multilevel Voltage Source Inverter (VSI). A decoupled control scheme has been implemented based on the current at the terminal of the VSI. The simulation is performed on OPAL-RT and Speedgoat digital simulators. Further, full closed-loop models are evaluated in an experimental benchmark for the step response of active and reactive power (P and Q) changes. The real-time modeling and prototyping shows the capability of fully closed-loop control to develop and validate actual power electronic devices implemented on the power networks.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116418222","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598456
K. Solak, Waldemar Rebiant
In this paper, investigation of ferroresonance phenomena in medium voltage (MV) networks are presented and discussed. The main attention was paid to developing of adequate digital simulation model for investigation of ferroresonance oscillations in MATLAB/Simulink program as well as to analysis of various conditions that may initiate ferroresonance oscillations. In addition, two system grounding arrangements were taken into account with ungrounded and Petersen coil earthed neutral point. In the paper simulative analyses of ferroresonance initiation conditions as well as looking for signals reflecting this phenomenon are described. The phase as well as open delta VT voltages and their spectra were considered as signals for ferroresonance detection. Additionally, the suppression possibility of ferroresonance oscillations was also studied. The results related to both ferroresonance initiation detection and its suppression are presented in the paper.
{"title":"Modeling of Ferroresonance Phenomena in MV Networks","authors":"K. Solak, Waldemar Rebiant","doi":"10.1109/EPEC.2018.8598456","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598456","url":null,"abstract":"In this paper, investigation of ferroresonance phenomena in medium voltage (MV) networks are presented and discussed. The main attention was paid to developing of adequate digital simulation model for investigation of ferroresonance oscillations in MATLAB/Simulink program as well as to analysis of various conditions that may initiate ferroresonance oscillations. In addition, two system grounding arrangements were taken into account with ungrounded and Petersen coil earthed neutral point. In the paper simulative analyses of ferroresonance initiation conditions as well as looking for signals reflecting this phenomenon are described. The phase as well as open delta VT voltages and their spectra were considered as signals for ferroresonance detection. Additionally, the suppression possibility of ferroresonance oscillations was also studied. The results related to both ferroresonance initiation detection and its suppression are presented in the paper.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"67 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114491342","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598331
Xiao-An Liang, A. El-Kadri
Electrical submersible pump (ESP) systems in oil field have unique features due to the long cabling effect. The electrical system for a typical ESP installation consists of a variable frequency drive (VFD), a multi-tap step-up transformer, a downhole main cable, and an electrical submersible motor. A load filter is usually required in a VFD-ESP system. In this paper, several factors that significantly affect operating conditions of an ESP system are presented through simulation and field measurements for a practical ESP system in the field. Such analysis is beneficial to field engineers and operators to better understand impacts of equipment settings.
{"title":"Factors Affecting Electrical Submersible Pump Systems Operation","authors":"Xiao-An Liang, A. El-Kadri","doi":"10.1109/EPEC.2018.8598331","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598331","url":null,"abstract":"Electrical submersible pump (ESP) systems in oil field have unique features due to the long cabling effect. The electrical system for a typical ESP installation consists of a variable frequency drive (VFD), a multi-tap step-up transformer, a downhole main cable, and an electrical submersible motor. A load filter is usually required in a VFD-ESP system. In this paper, several factors that significantly affect operating conditions of an ESP system are presented through simulation and field measurements for a practical ESP system in the field. Such analysis is beneficial to field engineers and operators to better understand impacts of equipment settings.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114608429","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598335
Xiaodong Liang, Xiaodi Yan, N. Khan
In this paper, measurement-based characteristic curves are developed for voltage stability and control at the point of interconnection (POI) between a wind farm and a utility grid. The procedure to obtain an effective Q-V curve from measurement data is proposed, and monthly Q-V curves are built. Each Q-V curve is created using the data corresponding to a very narrowly defined real power range so the real power can be considered constant as the conventional Q-V curve concept. The curve fitting tool box in MATLAB is used to realize the required fitting to develop mathematical equations. This paper paves a practical way to obtain mathematical functions to represent voltage stability characteristics of a particular wind farm.
{"title":"Measurement-Based Characteristic Curves at Point of Interconnection of Wind Farms","authors":"Xiaodong Liang, Xiaodi Yan, N. Khan","doi":"10.1109/EPEC.2018.8598335","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598335","url":null,"abstract":"In this paper, measurement-based characteristic curves are developed for voltage stability and control at the point of interconnection (POI) between a wind farm and a utility grid. The procedure to obtain an effective Q-V curve from measurement data is proposed, and monthly Q-V curves are built. Each Q-V curve is created using the data corresponding to a very narrowly defined real power range so the real power can be considered constant as the conventional Q-V curve concept. The curve fitting tool box in MATLAB is used to realize the required fitting to develop mathematical equations. This paper paves a practical way to obtain mathematical functions to represent voltage stability characteristics of a particular wind farm.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129804769","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598332
A. L. Rojas, S. Koziel, M. F. Abdel-Fattah, G. Gutiérrez-Alcaraz
This paper addresses a problem of power distribution network optimization, specifically, an improvement of the voltage stability index (VSI). A customized algorithm, referred to as feasibility preserving evolutionary optimization (FPEO), is developed and employed that involves recombination and mutation operators tailored to maintain the radial architecture of the network and enhances VSI through network reconfiguration. The algorithm performance is validated using the three standard test distribution systems, 33-, 69-, and 119-bus networks. Excellent repeatability of results is achieved as demonstrated through comprehensive statistical analysis. The optimal reconfiguration found by the proposed algorithm significantly improves the VSI of the buses most prone to voltage collapse. At the same time, the voltage profile improvement is obtained along with reduction of the power losses.
{"title":"Distribution Network Reconfiguration for Voltage Stability Enhancement via Feasibility-Preserving Evolutionary Optimization","authors":"A. L. Rojas, S. Koziel, M. F. Abdel-Fattah, G. Gutiérrez-Alcaraz","doi":"10.1109/EPEC.2018.8598332","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598332","url":null,"abstract":"This paper addresses a problem of power distribution network optimization, specifically, an improvement of the voltage stability index (VSI). A customized algorithm, referred to as feasibility preserving evolutionary optimization (FPEO), is developed and employed that involves recombination and mutation operators tailored to maintain the radial architecture of the network and enhances VSI through network reconfiguration. The algorithm performance is validated using the three standard test distribution systems, 33-, 69-, and 119-bus networks. Excellent repeatability of results is achieved as demonstrated through comprehensive statistical analysis. The optimal reconfiguration found by the proposed algorithm significantly improves the VSI of the buses most prone to voltage collapse. At the same time, the voltage profile improvement is obtained along with reduction of the power losses.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128220426","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598446
Mohsen Khalaf, A. Youssef, E. El-Saadany
Automatic Generation Control (AGC) systems adjust the power output of multiple generators at different power plants, in response to changes in the load. In addition to regulating the system frequency, AGC systems help to minimize the tie-line power deviation in multi-area systems. Given their reliance on communication links in order to send/receive mea-surements/control actions about frequency and power deviation in the power system, AGC systems are vulnerable to false data injection (FDI) attacks. Several works have considered the effect of these cyber attacks on AGC systems and many approaches have been proposed to detect FDI attacks against them. However, non of the previous works considered the nonlinearity of the AGC system and all the proposed solutions are only effective under the assumed linearity of the AGC model. In this work, we address this deficiency and propose a new particle filter-based approach to detect FDI attacks in AGC systems considering both the communication time-delay and governor dead-band nonlinearities. To confirm the effectiveness of this approach, a 2-area power system is simulated using MATLAB/Simulink. The results show that the utilized technique is capable of detecting various types of false data injection attacks against the considered AGC system.
{"title":"A Particle Filter-Based Approach for the Detection of False Data Injection Attacks on Automatic Generation Control Systems","authors":"Mohsen Khalaf, A. Youssef, E. El-Saadany","doi":"10.1109/EPEC.2018.8598446","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598446","url":null,"abstract":"Automatic Generation Control (AGC) systems adjust the power output of multiple generators at different power plants, in response to changes in the load. In addition to regulating the system frequency, AGC systems help to minimize the tie-line power deviation in multi-area systems. Given their reliance on communication links in order to send/receive mea-surements/control actions about frequency and power deviation in the power system, AGC systems are vulnerable to false data injection (FDI) attacks. Several works have considered the effect of these cyber attacks on AGC systems and many approaches have been proposed to detect FDI attacks against them. However, non of the previous works considered the nonlinearity of the AGC system and all the proposed solutions are only effective under the assumed linearity of the AGC model. In this work, we address this deficiency and propose a new particle filter-based approach to detect FDI attacks in AGC systems considering both the communication time-delay and governor dead-band nonlinearities. To confirm the effectiveness of this approach, a 2-area power system is simulated using MATLAB/Simulink. The results show that the utilized technique is capable of detecting various types of false data injection attacks against the considered AGC system.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130894161","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598302
P. Caballero, Sérgio Kurokawa, B. Kordi
Modal analysis is widely used in over-voltage and over-current studies of power systems. Modal transformation decouples a transmission line into its modes. Time-domain transmission line models usually require a real and constant modal transformation matrix. This paper proposes an approach that considers a real modal transformation matrix at a fix frequency to transform currents and voltages to the mode domain, and computes mode parameters using a frequency-dependent transformation matrix. Presented results demonstrate that the proposed approach is accurate and works with symmetrical, nonsymmetrical and vertical transmission overhead line geometries.
{"title":"Routine for Simulating Transmission Lines with Symmetrical and Asymmetrical Configurations Using a Real and Constant Modal Transformation Matrix","authors":"P. Caballero, Sérgio Kurokawa, B. Kordi","doi":"10.1109/EPEC.2018.8598302","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598302","url":null,"abstract":"Modal analysis is widely used in over-voltage and over-current studies of power systems. Modal transformation decouples a transmission line into its modes. Time-domain transmission line models usually require a real and constant modal transformation matrix. This paper proposes an approach that considers a real modal transformation matrix at a fix frequency to transform currents and voltages to the mode domain, and computes mode parameters using a frequency-dependent transformation matrix. Presented results demonstrate that the proposed approach is accurate and works with symmetrical, nonsymmetrical and vertical transmission overhead line geometries.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128942514","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598313
A. Pardasani, J. Veitch, G. Newsham, Yitian Hu, T. Cormier, Sonya Hull
This paper presents results from a pilot study in 50 occupied homes in Fredericton, New Brunswick, Canada to evaluate a demand response (DR) strategy applied to residential electric baseboard heating loads. The underlying principle is based on storing electricity as thermal energy in the building envelope and household contents before the grid peak demand period, and then discharging that stored energy to maintain conditions for thermal comfort during the peak period. During January and February 2016, a total of 13 DR interventions were executed. This field test showed that a load shift up to a maximum of 3.4 kW, with an average of 1.4 kW, per household was possible for the first hour, depending on the outdoor temperature. We observed a large variation in load shift between homes, partly depending on the thermostat set-point profiles, building and occupant characteristics. The approach holds significant potential for shifting peak loads in locations where electricity is a major source of energy for space heating.
{"title":"Demand Control of Baseboard Heaters: Lessons Learned from 50-home Pilot Study","authors":"A. Pardasani, J. Veitch, G. Newsham, Yitian Hu, T. Cormier, Sonya Hull","doi":"10.1109/EPEC.2018.8598313","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598313","url":null,"abstract":"This paper presents results from a pilot study in 50 occupied homes in Fredericton, New Brunswick, Canada to evaluate a demand response (DR) strategy applied to residential electric baseboard heating loads. The underlying principle is based on storing electricity as thermal energy in the building envelope and household contents before the grid peak demand period, and then discharging that stored energy to maintain conditions for thermal comfort during the peak period. During January and February 2016, a total of 13 DR interventions were executed. This field test showed that a load shift up to a maximum of 3.4 kW, with an average of 1.4 kW, per household was possible for the first hour, depending on the outdoor temperature. We observed a large variation in load shift between homes, partly depending on the thermostat set-point profiles, building and occupant characteristics. The approach holds significant potential for shifting peak loads in locations where electricity is a major source of energy for space heating.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122200854","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598449
Laura M. Escobar, Adolfo R. Escobedo, David G. Escobar, R. Romero
This paper presents a methodology to solve the long-term transmission network expansion planning problem considering L-l reliability. The methodology supplements an underlying mixed-integer linear programming formulation with cutting planes derived from structural insights of bus-angle differences involving buses connected by paths of existing and/or expansion lines. The addition of these cutting planes expedites the solution process by yielding tighter relaxation bounds within a branch-and-cut framework, thereby reducing computational times and memory requirements. In order to solve the resulting problems, this work uses the AMPL modeling language interfaced with the CPLEX mathematical programming solver. The practicality of the methodology is tested via the Southern Brazilian System, yielding very promising results.
{"title":"Bus-Angle Difference Structural Cuts for Transmission System Expansion Planning with L-l Reliability","authors":"Laura M. Escobar, Adolfo R. Escobedo, David G. Escobar, R. Romero","doi":"10.1109/EPEC.2018.8598449","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598449","url":null,"abstract":"This paper presents a methodology to solve the long-term transmission network expansion planning problem considering L-l reliability. The methodology supplements an underlying mixed-integer linear programming formulation with cutting planes derived from structural insights of bus-angle differences involving buses connected by paths of existing and/or expansion lines. The addition of these cutting planes expedites the solution process by yielding tighter relaxation bounds within a branch-and-cut framework, thereby reducing computational times and memory requirements. In order to solve the resulting problems, this work uses the AMPL modeling language interfaced with the CPLEX mathematical programming solver. The practicality of the methodology is tested via the Southern Brazilian System, yielding very promising results.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"299 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121455800","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 : 2018-10-01DOI: 10.1109/EPEC.2018.8598364
J. T. R. Pineda, Sérgio Kurokawa
This paper presents a method to estimate transmission line parameters for transposed lines from faulted current and voltage measurements at the line's terminals, in the time domain. The measurements are transformed to the modal domain, using Clarke's transformation matrix, and related to the modal impedance and admittance using the $pi$ -circuit representation. The lumped modal parameters calculated by the least square method are firstly distributed along the line and finally converted to the phase domain. The method is tested for both short and open circuit faults and proved invariant and precise for transmission lines within 800km of length.
{"title":"Estimation of parameters for faulted transposed transmission lines","authors":"J. T. R. Pineda, Sérgio Kurokawa","doi":"10.1109/EPEC.2018.8598364","DOIUrl":"https://doi.org/10.1109/EPEC.2018.8598364","url":null,"abstract":"This paper presents a method to estimate transmission line parameters for transposed lines from faulted current and voltage measurements at the line's terminals, in the time domain. The measurements are transformed to the modal domain, using Clarke's transformation matrix, and related to the modal impedance and admittance using the $pi$ -circuit representation. The lumped modal parameters calculated by the least square method are firstly distributed along the line and finally converted to the phase domain. The method is tested for both short and open circuit faults and proved invariant and precise for transmission lines within 800km of length.","PeriodicalId":265297,"journal":{"name":"2018 IEEE Electrical Power and Energy Conference (EPEC)","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124463432","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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