Pub Date : 2016-07-17DOI: 10.1109/PESGM.2016.7741352
Wei Wei, Da Huo, S. Le Blond
This paper quantifies the benefit of the borehole array summer active recharge in the context of a small community heating system. The system uses a low carbon energy chain - specifically photovoltaic panels to supply electricity, a borehole array for heat storage, an air source heat pump for summer active recharge and a ground source heat pump for heating supply in the winter. By comparing two different charging strategies and non-charged base scenario, the benefit can be quantified in reduced electricity consumption and carbon emission reduction. This research gives an indication of the system efficiency and consequent reduction of electricity consumption and carbon emissions for a small community. The results provide a starting point for a feasibility study into inter-seasonal storage of community-level energy hubs.
{"title":"Borehole active recharge benefit quantification on a community level low carbon heating system","authors":"Wei Wei, Da Huo, S. Le Blond","doi":"10.1109/PESGM.2016.7741352","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741352","url":null,"abstract":"This paper quantifies the benefit of the borehole array summer active recharge in the context of a small community heating system. The system uses a low carbon energy chain - specifically photovoltaic panels to supply electricity, a borehole array for heat storage, an air source heat pump for summer active recharge and a ground source heat pump for heating supply in the winter. By comparing two different charging strategies and non-charged base scenario, the benefit can be quantified in reduced electricity consumption and carbon emission reduction. This research gives an indication of the system efficiency and consequent reduction of electricity consumption and carbon emissions for a small community. The results provide a starting point for a feasibility study into inter-seasonal storage of community-level energy hubs.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"171 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120940949","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741982
S. Rajesvaran, S. Filizadeh
The paper develops a mathematical model for a modular multilevel converter (MMC) using extended-frequency dynamic phasors. The developed model is capable of capturing both the low- and high-frequency dynamic behavior of the converter depending on the requirements of the study to be performed. The paper shows the mathematical development of the model, its validation against a fully detailed electromagnetic transient (EMT) model in PSCAD/EMTDC, and its computational advantages over an EMT model.
{"title":"Modeling modular multilevel converters using extended-frequency dynamic phasors","authors":"S. Rajesvaran, S. Filizadeh","doi":"10.1109/PESGM.2016.7741982","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741982","url":null,"abstract":"The paper develops a mathematical model for a modular multilevel converter (MMC) using extended-frequency dynamic phasors. The developed model is capable of capturing both the low- and high-frequency dynamic behavior of the converter depending on the requirements of the study to be performed. The paper shows the mathematical development of the model, its validation against a fully detailed electromagnetic transient (EMT) model in PSCAD/EMTDC, and its computational advantages over an EMT model.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121036822","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741274
Yingwei Huang, M. Chapariha, S. Ebrahimi, Navid Amiri, J. Jatskevich
This paper focuses on the modeling of integrated ac-dc backup and generation power systems, which has received increasing attention due to the emergence of microgrids and distributed generations. The conventional shifted-frequency analysis (SFA) type dynamic phasors (DPs) assume a bandpass spectrum of power system signals, and thus are only suitable to model system components wherein the 60Hz fundamental frequency is dominant. To account for high-order harmonics of interest in ac-dc systems, this paper considers another type of DPs based on the generalized averaging method (GAM), and proposes a possible interface between the SFA- and GAM-type DP models. Computer studies demonstrate that the proposed DP interface allows for accurate simulations of both fundamental frequency components and high-order harmonics in integrated ac-dc power systems, while providing significant numerical advantages over the conventional time-domain detailed models.
{"title":"Interfacing SFA- and GAM-type dynamic phasors for modeling of integrated AC-DC power systems","authors":"Yingwei Huang, M. Chapariha, S. Ebrahimi, Navid Amiri, J. Jatskevich","doi":"10.1109/PESGM.2016.7741274","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741274","url":null,"abstract":"This paper focuses on the modeling of integrated ac-dc backup and generation power systems, which has received increasing attention due to the emergence of microgrids and distributed generations. The conventional shifted-frequency analysis (SFA) type dynamic phasors (DPs) assume a bandpass spectrum of power system signals, and thus are only suitable to model system components wherein the 60Hz fundamental frequency is dominant. To account for high-order harmonics of interest in ac-dc systems, this paper considers another type of DPs based on the generalized averaging method (GAM), and proposes a possible interface between the SFA- and GAM-type DP models. Computer studies demonstrate that the proposed DP interface allows for accurate simulations of both fundamental frequency components and high-order harmonics in integrated ac-dc power systems, while providing significant numerical advantages over the conventional time-domain detailed models.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125080311","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741929
Shengyuan Chen, A. Saber, T. Khandelwal
Battery applications are increasing day by day from a single cell to MWh range in electric vehicles, electric traction, PV systems, grid support, etc. Considering energy density and price, correctly apply, size and analyze batteries for these systems remains a major challenge and requires sufficient battery characteristics. Most battery manufacturers provide limited sets of battery charging & discharging characteristic data, which are not adequate for battery simulation in a system that different types of loads are connected, or different charging scenarios are applied. Therefore, accurate & comprehensive battery modeling is needed. A non-linear open circuit voltage (Voc) model is derived with respect to state of charge (SOC) from battery charge-discharge characteristic curves. For hysteresis, two sets of non-linear Voc data are maintained for charging and discharging. This model is general for major types of batteries and results are acceptable as simulation error is minimal.
{"title":"General battery modeling and simulation using non-linear open circuit voltage in power system analysis","authors":"Shengyuan Chen, A. Saber, T. Khandelwal","doi":"10.1109/PESGM.2016.7741929","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741929","url":null,"abstract":"Battery applications are increasing day by day from a single cell to MWh range in electric vehicles, electric traction, PV systems, grid support, etc. Considering energy density and price, correctly apply, size and analyze batteries for these systems remains a major challenge and requires sufficient battery characteristics. Most battery manufacturers provide limited sets of battery charging & discharging characteristic data, which are not adequate for battery simulation in a system that different types of loads are connected, or different charging scenarios are applied. Therefore, accurate & comprehensive battery modeling is needed. A non-linear open circuit voltage (Voc) model is derived with respect to state of charge (SOC) from battery charge-discharge characteristic curves. For hysteresis, two sets of non-linear Voc data are maintained for charging and discharging. This model is general for major types of batteries and results are acceptable as simulation error is minimal.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"79 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126176263","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741731
D. Suriyaarachchi, C. Karawita, M. Mohaddes
This paper presents the application of a Full-bridge modular multi-level converter (FB-MMC) to tap an existing LCC-HVdc system. During faults, the dc voltage of the FB-MMC is controlled to reduce the fault current instead of blocking the converters. Electromagnetic Transient Simulations performed with PSCAD has been used to demonstrate the performance of the proposed system. Control strategies have been proposed in case of ac and dc faults at the three terminals. The results presented in this paper clearly indicate the benefits of using a FB-MMC with a controlled fault clearing strategy to tap an existing LCC-HVdc system.
{"title":"Tapping existing LCC-HVdc systems with Voltage Source Converters","authors":"D. Suriyaarachchi, C. Karawita, M. Mohaddes","doi":"10.1109/PESGM.2016.7741731","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741731","url":null,"abstract":"This paper presents the application of a Full-bridge modular multi-level converter (FB-MMC) to tap an existing LCC-HVdc system. During faults, the dc voltage of the FB-MMC is controlled to reduce the fault current instead of blocking the converters. Electromagnetic Transient Simulations performed with PSCAD has been used to demonstrate the performance of the proposed system. Control strategies have been proposed in case of ac and dc faults at the three terminals. The results presented in this paper clearly indicate the benefits of using a FB-MMC with a controlled fault clearing strategy to tap an existing LCC-HVdc system.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123550442","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741729
T. Noda
It is often the case that the frequency response data of a network or a system is available and one wants to identify a linear equivalent from the frequency response data for time-domain simulations and other purposes. To this end, a variety of methods have been proposed, and the vector fitting (VF) method and the frequency-partitioning fitting (FpF) method are often used for electromagnetic transient (EMT) simulations of power systems. The main applications are frequency-dependent transmission-line modeling and frequency-dependent network modeling. This paper presents illustrative MATLAB code of the FpF method. Although the mathematical descriptions of the algorithms used in the FpF method have been fully presented in the literature, the illustrative code is still useful and necessary to understand the details of their implementation. It is verified that the code shown in this paper is fully functional and it can be used as a functioning software package.
{"title":"Implementation of the frequency-partitioning fitting method for linear equivalent identification from frequency response data","authors":"T. Noda","doi":"10.1109/PESGM.2016.7741729","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741729","url":null,"abstract":"It is often the case that the frequency response data of a network or a system is available and one wants to identify a linear equivalent from the frequency response data for time-domain simulations and other purposes. To this end, a variety of methods have been proposed, and the vector fitting (VF) method and the frequency-partitioning fitting (FpF) method are often used for electromagnetic transient (EMT) simulations of power systems. The main applications are frequency-dependent transmission-line modeling and frequency-dependent network modeling. This paper presents illustrative MATLAB code of the FpF method. Although the mathematical descriptions of the algorithms used in the FpF method have been fully presented in the literature, the illustrative code is still useful and necessary to understand the details of their implementation. It is verified that the code shown in this paper is fully functional and it can be used as a functioning software package.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115343345","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741848
Z. Taylor, H. Akhavan-Hejazi, Ed Cortez, L. Alvarez, S. Ula, M. Barth, Hamed Mohsenian-Rad
In this paper, a stochastic optimization framework is developed to reduce congestion on distribution feeders using batteries, under offline and online design paradigms. Our design is customized, implemented, tested, and analyzed in a real-world testbed that was built based on a university-utility collaboration in California. Our proposed method seeks to optimize peak load at the feeder while taking into account feeder load uncertainty as well as hardware, utility, and customer constraints. We present both experimental and numerical results. Insightful observations, design trade-offs, and lessons learned are discussed.
{"title":"Battery-assisted distribution feeder peak load reduction: Stochastic optimization and utility-scale implementation","authors":"Z. Taylor, H. Akhavan-Hejazi, Ed Cortez, L. Alvarez, S. Ula, M. Barth, Hamed Mohsenian-Rad","doi":"10.1109/PESGM.2016.7741848","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741848","url":null,"abstract":"In this paper, a stochastic optimization framework is developed to reduce congestion on distribution feeders using batteries, under offline and online design paradigms. Our design is customized, implemented, tested, and analyzed in a real-world testbed that was built based on a university-utility collaboration in California. Our proposed method seeks to optimize peak load at the feeder while taking into account feeder load uncertainty as well as hardware, utility, and customer constraints. We present both experimental and numerical results. Insightful observations, design trade-offs, and lessons learned are discussed.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"29 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116058968","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741813
Hesamaldin Maleki, R. Varma
This paper presents a novel control of PV solar farm as a STATCOM (PV-STATCOM) coordinated with Power System Stabilizers (PSSs) for damping of electromechanical oscillations in a power system. A two-area power system with a 150 MW PV solar plant connected at the midpoint of the tie line is simulated in PSCAD/EMTDC software. During contingencies, the capacity of the PV inverter remaining after real power generation is utilized for dynamic reactive power exchange to accomplish power oscillation damping. The advantage of master-slave feature in PSCAD/EMTDC software is utilized for performing the optimization and controller coordination. It is demonstrated that a coordinated control of PV-STATCOM and PSS can effectively enhance the damping of power oscillations, leading to higher power transfers in lines. This novel control of PV solar farms will result in a more optimal utilization of the expensive PV system asset for grid stabilization and enhancement of power transmission capability.
{"title":"Coordinated control of PV solar system as STATCOM (PV-STATCOM) and Power System Stabilizers for power oscillation damping","authors":"Hesamaldin Maleki, R. Varma","doi":"10.1109/PESGM.2016.7741813","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741813","url":null,"abstract":"This paper presents a novel control of PV solar farm as a STATCOM (PV-STATCOM) coordinated with Power System Stabilizers (PSSs) for damping of electromechanical oscillations in a power system. A two-area power system with a 150 MW PV solar plant connected at the midpoint of the tie line is simulated in PSCAD/EMTDC software. During contingencies, the capacity of the PV inverter remaining after real power generation is utilized for dynamic reactive power exchange to accomplish power oscillation damping. The advantage of master-slave feature in PSCAD/EMTDC software is utilized for performing the optimization and controller coordination. It is demonstrated that a coordinated control of PV-STATCOM and PSS can effectively enhance the damping of power oscillations, leading to higher power transfers in lines. This novel control of PV solar farms will result in a more optimal utilization of the expensive PV system asset for grid stabilization and enhancement of power transmission capability.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116439987","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741422
T. Ngo, S. Santoso
The low frequency AC (LFAC) transmission, in which a power system is operated at a low frequency, i.e., below 50/60 Hz, is superior to the conventional 60 Hz system in terms of power transfer capability. In addition, due to low operating frequency, the line reactance is reduced and thus voltage drops along the line are decreased. The low frequency transmission thus offers a higher voltage profile for a power system. In other words, an LFAC system can be more voltage stable in comparison to the conventional 60-Hz system. This paper intends to focus on the voltage stability of an LFAC system. The theoretical foundations of a two-bus system are first discussed based on eigenvalue. A modified stability index calculation is also introduced for low frequency transmission to estimate the system stability accurately. The simulation results from a practical system verify that the LFAC transmission has great benefits over the 60 Hz system in terms of power transfer capability and voltage stability.
{"title":"Modal-based voltage stability analysis of low frequency AC transmission systems","authors":"T. Ngo, S. Santoso","doi":"10.1109/PESGM.2016.7741422","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741422","url":null,"abstract":"The low frequency AC (LFAC) transmission, in which a power system is operated at a low frequency, i.e., below 50/60 Hz, is superior to the conventional 60 Hz system in terms of power transfer capability. In addition, due to low operating frequency, the line reactance is reduced and thus voltage drops along the line are decreased. The low frequency transmission thus offers a higher voltage profile for a power system. In other words, an LFAC system can be more voltage stable in comparison to the conventional 60-Hz system. This paper intends to focus on the voltage stability of an LFAC system. The theoretical foundations of a two-bus system are first discussed based on eigenvalue. A modified stability index calculation is also introduced for low frequency transmission to estimate the system stability accurately. The simulation results from a practical system verify that the LFAC transmission has great benefits over the 60 Hz system in terms of power transfer capability and voltage stability.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122424558","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 : 2016-07-17DOI: 10.1109/PESGM.2016.7741666
V. S. Tejwani, B. Suthar
The combination of Photovoltaic (PV) with a hydrogen storage system as backup (HPVHS - Hybrid PV Hydrogen System) has been proposed in this paper. The Proposed system will cope up with the problems of grid connected PV System (GPVS) which is being stochastic in nature. The control strategy has been proposed for direct and indirect grid voltage regulation utilizing proposed HPVHS as static synchronous compensator (STATCOM). It has been shown that the HPVHS based on this control strategy would improve the dynamic behavior of the GPVS response to disturbance, voltage dips and in a day ahead market where decisions on the power supply should be taken at least 24 hours in advance. MATLAB/SIMULINK based simulation is done and results are provided to show the effectiveness of the proposed control strategy.
{"title":"Control strategy for utility interactive hybrid PV Hydrogen System","authors":"V. S. Tejwani, B. Suthar","doi":"10.1109/PESGM.2016.7741666","DOIUrl":"https://doi.org/10.1109/PESGM.2016.7741666","url":null,"abstract":"The combination of Photovoltaic (PV) with a hydrogen storage system as backup (HPVHS - Hybrid PV Hydrogen System) has been proposed in this paper. The Proposed system will cope up with the problems of grid connected PV System (GPVS) which is being stochastic in nature. The control strategy has been proposed for direct and indirect grid voltage regulation utilizing proposed HPVHS as static synchronous compensator (STATCOM). It has been shown that the HPVHS based on this control strategy would improve the dynamic behavior of the GPVS response to disturbance, voltage dips and in a day ahead market where decisions on the power supply should be taken at least 24 hours in advance. MATLAB/SIMULINK based simulation is done and results are provided to show the effectiveness of the proposed control strategy.","PeriodicalId":155315,"journal":{"name":"2016 IEEE Power and Energy Society General Meeting (PESGM)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-07-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122476591","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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