Pub Date : 2020-12-16DOI: 10.1109/SGC52076.2020.9335760
Seyed Mohammad Taher, S. A. Taher, Zahra Dehghani Arani, M. Rahimi
In this paper, an inductive SFCL is proposed and designed to achieve the LVRT requirement of WECSs. Hence, this study represents a new SFCL-based protection scheme for wind farms including DFIG and PMSG systems. The accurate model of inductive SFCL with state transition based on value and duration of fault current is presented for simulation in MATLAB/SIMULINK software. The main objectives of using this proposed scheme are limiting and damping the peak values of the DC-link voltage, rotor current, stator current and electromagnetic torque oscillation of WECSs when a fault occurs. Also, after the fault clearance, the proposed scheme can provide transient recovery process smoothly. To evaluate the effectiveness and performance of the proposed scheme, 6-MW DFIG system and 8-MW PMSG system are considered as a large-scale wind farm. The performance evaluations and comparisons demonstrate the superiority of the proposed scheme in improving the LVRT capabilities of WECSs.
{"title":"A New Approach for Low Voltage Ride Through Enhancement in Grid-Connected Wind Farms","authors":"Seyed Mohammad Taher, S. A. Taher, Zahra Dehghani Arani, M. Rahimi","doi":"10.1109/SGC52076.2020.9335760","DOIUrl":"https://doi.org/10.1109/SGC52076.2020.9335760","url":null,"abstract":"In this paper, an inductive SFCL is proposed and designed to achieve the LVRT requirement of WECSs. Hence, this study represents a new SFCL-based protection scheme for wind farms including DFIG and PMSG systems. The accurate model of inductive SFCL with state transition based on value and duration of fault current is presented for simulation in MATLAB/SIMULINK software. The main objectives of using this proposed scheme are limiting and damping the peak values of the DC-link voltage, rotor current, stator current and electromagnetic torque oscillation of WECSs when a fault occurs. Also, after the fault clearance, the proposed scheme can provide transient recovery process smoothly. To evaluate the effectiveness and performance of the proposed scheme, 6-MW DFIG system and 8-MW PMSG system are considered as a large-scale wind farm. The performance evaluations and comparisons demonstrate the superiority of the proposed scheme in improving the LVRT capabilities of WECSs.","PeriodicalId":391511,"journal":{"name":"2020 10th Smart Grid Conference (SGC)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132634863","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 : 2020-12-16DOI: 10.1109/SGC52076.2020.9335757
M. Sheibani, A. Moshari
Resilience modeling in the operation of a microgrid is the main challenge in this paper. The studied microgrid consists of the conventional power plants, wind power plants, energy storage systems, and interruptible and uninterruptible loads. The proposed model for operation planning of the microgrid considering the resiliency is based on a probabilistic optimization method. Total operational costs consist of the normal and incident modes cost are considered in the objective function. The limitations of the conventional power plants, energy storage systems, and microgrid are formulated as the constraints of the problem. The stochastic nature of disconnecting from the upstream network is modeled as a scenario based formulation. The scenarios consists of the incident happening and the starting hour of the incident. The problem is formulated as a mixed integer linear program and is solved by MIP solver in GAMS. Numerical results confirm the capability of the proposed model.
{"title":"Operation Planning of a Microgrid Considering the Resiliency in the Presence of Energy Storage Systems","authors":"M. Sheibani, A. Moshari","doi":"10.1109/SGC52076.2020.9335757","DOIUrl":"https://doi.org/10.1109/SGC52076.2020.9335757","url":null,"abstract":"Resilience modeling in the operation of a microgrid is the main challenge in this paper. The studied microgrid consists of the conventional power plants, wind power plants, energy storage systems, and interruptible and uninterruptible loads. The proposed model for operation planning of the microgrid considering the resiliency is based on a probabilistic optimization method. Total operational costs consist of the normal and incident modes cost are considered in the objective function. The limitations of the conventional power plants, energy storage systems, and microgrid are formulated as the constraints of the problem. The stochastic nature of disconnecting from the upstream network is modeled as a scenario based formulation. The scenarios consists of the incident happening and the starting hour of the incident. The problem is formulated as a mixed integer linear program and is solved by MIP solver in GAMS. Numerical results confirm the capability of the proposed model.","PeriodicalId":391511,"journal":{"name":"2020 10th Smart Grid Conference (SGC)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133734955","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 : 2020-12-16DOI: 10.1109/SGC52076.2020.9335737
Negar Totonchi, H. Gholizadeh, Saeed Mahdizadeh, E. Afjei
In this study, a high step-up DC-DC converter has been proposed. The topology of the proposed converter is based on the cascade boost circuit, voltage multiplier cell and the self-lift Luo converter. The detailed properties of the proposed converter have been described in continues current mode. Based on the mentioned description, the various parameters of the proposed converter have been described mathematically. Moreover, the non-ideal voltage ratio based on the non-ideal mode of the circuit components has been expressed. The simulation results were extracted by PLECS. The inductors current and the capacitors voltage have been studied. Moreover, the extracted results have been compared with theoretical relations.
{"title":"A High Step up DC-DC Converter Based on the Cascade Boost, Voltage Multiplier Cell and Self Lift Luo Converter","authors":"Negar Totonchi, H. Gholizadeh, Saeed Mahdizadeh, E. Afjei","doi":"10.1109/SGC52076.2020.9335737","DOIUrl":"https://doi.org/10.1109/SGC52076.2020.9335737","url":null,"abstract":"In this study, a high step-up DC-DC converter has been proposed. The topology of the proposed converter is based on the cascade boost circuit, voltage multiplier cell and the self-lift Luo converter. The detailed properties of the proposed converter have been described in continues current mode. Based on the mentioned description, the various parameters of the proposed converter have been described mathematically. Moreover, the non-ideal voltage ratio based on the non-ideal mode of the circuit components has been expressed. The simulation results were extracted by PLECS. The inductors current and the capacitors voltage have been studied. Moreover, the extracted results have been compared with theoretical relations.","PeriodicalId":391511,"journal":{"name":"2020 10th Smart Grid Conference (SGC)","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131793903","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 : 2020-12-16DOI: 10.1109/SGC52076.2020.9335741
A. Azad, V. Vahidinasab, H. Shateri
Continues supply of the microgrid is the main purpose of a power management system. A distinct approach to power generation planning of a stand-alone energy farm that consists of batteries, wind turbines, the PV system, and a diesel generator is presented in this work. At the first, the required energy of the microgrid is supplied by wind and PV systems. In the second phase, energy is supplied by an energy storage system (here batteries). The last priority is to use diesel generators to feed the microgrid in case of emergency. The presented planning considers uncertainties in power generation and aims to increase the reliability of planning and decrease installation costs over the project's lifetime. A Modified discrete harmony search (MDHS) and particle swarm optimization (PSO) algorithms are utilized in the optimization procedure. The system's components are modeled accurately, and the constraints are considered so far as possible. Real data of the load, wind, PV, battery, and diesel generator systems are used to provide a model for facing real-world situations. The charging process of the batteries is modeled realistically and is not modeled ideally. The proposed approach is tested on various operational scenarios to obtain the best results demonstrating the validity and efficiency of the proposed approach.
{"title":"Optimal Planning of a Stand-Alone Hybrid Energy Farm Encompassing Wind, PV, Diesel Generator and Storage Unit","authors":"A. Azad, V. Vahidinasab, H. Shateri","doi":"10.1109/SGC52076.2020.9335741","DOIUrl":"https://doi.org/10.1109/SGC52076.2020.9335741","url":null,"abstract":"Continues supply of the microgrid is the main purpose of a power management system. A distinct approach to power generation planning of a stand-alone energy farm that consists of batteries, wind turbines, the PV system, and a diesel generator is presented in this work. At the first, the required energy of the microgrid is supplied by wind and PV systems. In the second phase, energy is supplied by an energy storage system (here batteries). The last priority is to use diesel generators to feed the microgrid in case of emergency. The presented planning considers uncertainties in power generation and aims to increase the reliability of planning and decrease installation costs over the project's lifetime. A Modified discrete harmony search (MDHS) and particle swarm optimization (PSO) algorithms are utilized in the optimization procedure. The system's components are modeled accurately, and the constraints are considered so far as possible. Real data of the load, wind, PV, battery, and diesel generator systems are used to provide a model for facing real-world situations. The charging process of the batteries is modeled realistically and is not modeled ideally. The proposed approach is tested on various operational scenarios to obtain the best results demonstrating the validity and efficiency of the proposed approach.","PeriodicalId":391511,"journal":{"name":"2020 10th Smart Grid Conference (SGC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121100465","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 : 2019-11-09DOI: 10.1109/SGC52076.2020.9335745
A. Montazeri, Alireza Sedighi Anaraki, S. Aref
In this paper, the optimal operation of a microgrid is investigated when the network is connected at a 24-hour interval for a specific day. For the optimal operation, some criteria, such as the simultaneous reduction in operation costs, losses, and voltage deviations, as well as the increase in reliability are taken into consideration. Given the capacity of the installed units, a part of the load of the demanded energy is always supplied by the grid. In line with the objectives set, planning for the charge and discharge of storage systems as well as the interaction among distributed power generators are investigated. The operation process is considered as an optimization problem, and the created problem is solved by the Sequential Quadratic Programming (SQP) algorithm. In addition, by implementing the Demand Response (DR) program in the optimal operation, the acquired results are compared with those obtained when this strategy is not employed. Simulation results indicate that the utilization of the Demand Response (DR) program in the optimal operation of the microgrid leads to a number of improvements. To elucidate it more, in addition to the decrease in the operation costs of the microgrid, the voltage deviation indices, reliability, and losses are improved contrary to non-DR schemes.
{"title":"Optimal Technical and Economical Operation of Microgrids through the Implementation of Sequential Quadratic Programming Algorithm","authors":"A. Montazeri, Alireza Sedighi Anaraki, S. Aref","doi":"10.1109/SGC52076.2020.9335745","DOIUrl":"https://doi.org/10.1109/SGC52076.2020.9335745","url":null,"abstract":"In this paper, the optimal operation of a microgrid is investigated when the network is connected at a 24-hour interval for a specific day. For the optimal operation, some criteria, such as the simultaneous reduction in operation costs, losses, and voltage deviations, as well as the increase in reliability are taken into consideration. Given the capacity of the installed units, a part of the load of the demanded energy is always supplied by the grid. In line with the objectives set, planning for the charge and discharge of storage systems as well as the interaction among distributed power generators are investigated. The operation process is considered as an optimization problem, and the created problem is solved by the Sequential Quadratic Programming (SQP) algorithm. In addition, by implementing the Demand Response (DR) program in the optimal operation, the acquired results are compared with those obtained when this strategy is not employed. Simulation results indicate that the utilization of the Demand Response (DR) program in the optimal operation of the microgrid leads to a number of improvements. To elucidate it more, in addition to the decrease in the operation costs of the microgrid, the voltage deviation indices, reliability, and losses are improved contrary to non-DR schemes.","PeriodicalId":391511,"journal":{"name":"2020 10th Smart Grid Conference (SGC)","volume":"27 5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-11-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126249649","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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