Pub Date : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028836
Jordi Pegueroles-Queralt, L. Igualada-Gonzalez, Cristina Corchero-Garcia, M. Cruz-Zambrano, G. Del-Rosario-Calaf
Microgrid is a promising paradigm for the large scale integration of DER in distribution networks. This paper addresses the state of the art in the conception, operation and design of microgrids. It also discusses the impact and contributions to distribution grids of multiple microgrids, coordinated through an aggregator agent. Microgrids may operate as isolated electrical systems in case of contingency in the distribution network; a comprehensive analysis on the energy management system and stabilizing control for such operation mode, as well as for the grid connected mode, is provided. This paper reflects the vision of the Catalonia Institute for Energy Research (IREC) for near future microgrids based on the experience of its laboratory test bed.
{"title":"Coordination of control and energy management methods for microgrid systems","authors":"Jordi Pegueroles-Queralt, L. Igualada-Gonzalez, Cristina Corchero-Garcia, M. Cruz-Zambrano, G. Del-Rosario-Calaf","doi":"10.1109/ISGTEUROPE.2014.7028836","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028836","url":null,"abstract":"Microgrid is a promising paradigm for the large scale integration of DER in distribution networks. This paper addresses the state of the art in the conception, operation and design of microgrids. It also discusses the impact and contributions to distribution grids of multiple microgrids, coordinated through an aggregator agent. Microgrids may operate as isolated electrical systems in case of contingency in the distribution network; a comprehensive analysis on the energy management system and stabilizing control for such operation mode, as well as for the grid connected mode, is provided. This paper reflects the vision of the Catalonia Institute for Energy Research (IREC) for near future microgrids based on the experience of its laboratory test bed.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"125 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123573018","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028850
M. Bhadu, N. Senroy
This paper presents a wide area damping control system using robust linear quadratic Gaussian (LQG) controller for damping the inter area oscillations in the power systems. The designed robust controller is capable of dealing with the problem of imperfect communication medium, which introduces communication noise, measurement noise and signal latency. The performance of the robust controller is verified by the non-linear time domain simulation in MATLAB/simulink and Software-In-Loop(SIL) validation is performed on real time digital simulator opal RT-lab.
{"title":"Real time simulation of a robust LQG based wide area damping controller in power system","authors":"M. Bhadu, N. Senroy","doi":"10.1109/ISGTEUROPE.2014.7028850","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028850","url":null,"abstract":"This paper presents a wide area damping control system using robust linear quadratic Gaussian (LQG) controller for damping the inter area oscillations in the power systems. The designed robust controller is capable of dealing with the problem of imperfect communication medium, which introduces communication noise, measurement noise and signal latency. The performance of the robust controller is verified by the non-linear time domain simulation in MATLAB/simulink and Software-In-Loop(SIL) validation is performed on real time digital simulator opal RT-lab.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125762767","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028980
S. Repo, F. Ponci, D. Della Giustina
Active network management of distribution networks has been proposed to enhance the reliability of network and the hosting capacity for renewable energy sources. Traditional distribution automation solutions are not scalable enough to utilize large-scale distributed energy resources in network management. The concept of commercial and technical aggregator is therefore merged with the concept of active network management. The aim of this paper is to provide a holistic overview of active network management utilizing flexibility services from aggregator. Special emphasis is given to distribution automation and how these systems need to be evolved.
{"title":"Holistic view of active distribution network and evolution of distribution automation","authors":"S. Repo, F. Ponci, D. Della Giustina","doi":"10.1109/ISGTEUROPE.2014.7028980","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028980","url":null,"abstract":"Active network management of distribution networks has been proposed to enhance the reliability of network and the hosting capacity for renewable energy sources. Traditional distribution automation solutions are not scalable enough to utilize large-scale distributed energy resources in network management. The concept of commercial and technical aggregator is therefore merged with the concept of active network management. The aim of this paper is to provide a holistic overview of active network management utilizing flexibility services from aggregator. Special emphasis is given to distribution automation and how these systems need to be evolved.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"54 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125045171","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028960
Otso Mäki, J. Seppanen, L. Haarla, K. Zenger, J. Turunen, Antti-Juhani Nikkilä
The development of Wide Area Measurement System (WAMS) technology has allowed the use of centralized control algorithms for damping inter-area oscillations in power systems. In this paper, Linear Quadratic Regulator (LQR) method is used to design a centralized controller that together with the existing power system stabilizers improves the damping of inter-area power oscillations. The focus of this paper is on studying how changes in power system operating conditions and grid topology affect the performance of the centralized controller. The controller performance is studied using modal analysis and nonlinear time domain simulations and compared against a conventional control strategy where only local power system stabilizers are used. The modal analysis of the closed loop system shows improvement in damping even after changes in operating conditions. However, nonlinear time domain simulations show that the controller performance deteriorates after changes in system operating conditions and grid topology.
{"title":"Analysis of a centralized control strategy in mitigating inter-area power oscillations","authors":"Otso Mäki, J. Seppanen, L. Haarla, K. Zenger, J. Turunen, Antti-Juhani Nikkilä","doi":"10.1109/ISGTEUROPE.2014.7028960","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028960","url":null,"abstract":"The development of Wide Area Measurement System (WAMS) technology has allowed the use of centralized control algorithms for damping inter-area oscillations in power systems. In this paper, Linear Quadratic Regulator (LQR) method is used to design a centralized controller that together with the existing power system stabilizers improves the damping of inter-area power oscillations. The focus of this paper is on studying how changes in power system operating conditions and grid topology affect the performance of the centralized controller. The controller performance is studied using modal analysis and nonlinear time domain simulations and compared against a conventional control strategy where only local power system stabilizers are used. The modal analysis of the closed loop system shows improvement in damping even after changes in operating conditions. However, nonlinear time domain simulations show that the controller performance deteriorates after changes in system operating conditions and grid topology.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128442062","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028935
Takuma Kogo, Shin Nakamura, S. Pravinraj, B. Arumugam
Irregularity of scheduled power-cut induces consumer's inefficient activity and therefore the consumer expects to know power-cut occurrence in advance. This paper proposes 3-heuristics which enable consumers to predict starttime of power-cuts for next day: SBP (Start-time of power-cut Based Prediction) using historical power-cut start-time data, FBP (Frequency Based Prediction) using historical frequency fluctuation data and ADSP (Adaptive Data Selection Prediction) which is a hybrid exploiting advantages of SBP/FBP with appropriate data period for overcoming changes of power-cut pattern. The evaluation results with power data of Chennai India showed that SBP totally achieved higher prediction success ratio than FBP and SBP has the advantage on regular power-cut pattern instead FBP has the same on the irregulars. Data period to maximize prediction success ratio depends on power-cut pattern as for SBP/FBP. The highest prediction success ratio was marked by ADSP which adaptively combined start-time/frequency data and determined data period on the basis of power-cuts pattern.
{"title":"A demand side prediction method for persistent scheduled power-cuts in developing countries","authors":"Takuma Kogo, Shin Nakamura, S. Pravinraj, B. Arumugam","doi":"10.1109/ISGTEUROPE.2014.7028935","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028935","url":null,"abstract":"Irregularity of scheduled power-cut induces consumer's inefficient activity and therefore the consumer expects to know power-cut occurrence in advance. This paper proposes 3-heuristics which enable consumers to predict starttime of power-cuts for next day: SBP (Start-time of power-cut Based Prediction) using historical power-cut start-time data, FBP (Frequency Based Prediction) using historical frequency fluctuation data and ADSP (Adaptive Data Selection Prediction) which is a hybrid exploiting advantages of SBP/FBP with appropriate data period for overcoming changes of power-cut pattern. The evaluation results with power data of Chennai India showed that SBP totally achieved higher prediction success ratio than FBP and SBP has the advantage on regular power-cut pattern instead FBP has the same on the irregulars. Data period to maximize prediction success ratio depends on power-cut pattern as for SBP/FBP. The highest prediction success ratio was marked by ADSP which adaptively combined start-time/frequency data and determined data period on the basis of power-cuts pattern.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128221626","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028964
Leandro Tolomeu Marques, D. Sanches, A. Delbem, Joao Bosco A. London Junior
Even in today's smart grid arena, service restoration continues to be an important issue for distribution system operation. Service restoration problem, that emerges after the faulted areas have been identified and isolated, involves network reconfiguration in order to minimize both the number of out-of-service loads and number of switching operations (the objectives of the service restoration problem) without violating the radiality and operational (limits for the bus voltage, network loading, and substation loading) constraints. As a consequence, the service restoration problem can be classified as a multi-objective optimization problem subject to multiple constraints. Additionally, due to the existence of some loads which are of the highest priority (e.g., hospitals and big industries), another need arises for this problem: to prioritize service restoration to priority customers. Thereby, to deal with this problem, in this paper it is proposed a mathematical formulation and a new methodology for determining service restoration plans in contingency situations. The main contribution of the proposed methodology is its ability to provide, in a short running time, service restoration plans in large-scale distribution systems that prioritize the supply to priority customers. Tests with distribution systems ranging from 631 switches and 3,860 buses to 5,158 switches and 30,880 buses have demonstrated the efficiency and the ability of the proposed methodology. The smallest tested system is the real distribution system of São Carlos city, in Brazil.
{"title":"Methodology for service restoration in large-scale distribution systems with priority customers","authors":"Leandro Tolomeu Marques, D. Sanches, A. Delbem, Joao Bosco A. London Junior","doi":"10.1109/ISGTEUROPE.2014.7028964","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028964","url":null,"abstract":"Even in today's smart grid arena, service restoration continues to be an important issue for distribution system operation. Service restoration problem, that emerges after the faulted areas have been identified and isolated, involves network reconfiguration in order to minimize both the number of out-of-service loads and number of switching operations (the objectives of the service restoration problem) without violating the radiality and operational (limits for the bus voltage, network loading, and substation loading) constraints. As a consequence, the service restoration problem can be classified as a multi-objective optimization problem subject to multiple constraints. Additionally, due to the existence of some loads which are of the highest priority (e.g., hospitals and big industries), another need arises for this problem: to prioritize service restoration to priority customers. Thereby, to deal with this problem, in this paper it is proposed a mathematical formulation and a new methodology for determining service restoration plans in contingency situations. The main contribution of the proposed methodology is its ability to provide, in a short running time, service restoration plans in large-scale distribution systems that prioritize the supply to priority customers. Tests with distribution systems ranging from 631 switches and 3,860 buses to 5,158 switches and 30,880 buses have demonstrated the efficiency and the ability of the proposed methodology. The smallest tested system is the real distribution system of São Carlos city, in Brazil.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129586386","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028956
Marie-Louise Kloubert, Christopher Spieker, J. Schwippe, U. Hager, C. Rehtanz, G. Blanco
The energy transition, which leads to shutdowns of conventional power plants with simultaneous expansion of renewable energy power plants, causes a strong change in the utilization of the transmission grid. It has to handle larger transport tasks, whereby the reactive power demand increases. At the same time fewer conventional power plants are available to balance the reactive power demand of the grid. In this paper, a model is presented to determine the reactive power demand in power transmission systems. In the simulation part the model is applied to Germany for the years 2011 and 2033 and the future development in the amount of locally needed reactive power supply is determined. Opportunities are identified to cover remaining reactive power demands, which cannot be provided by existing power plants. In an economic analysis these different reactive power sources are compared to supply the needed reactive power at minimal costs.
{"title":"Impact of the integration of renewable energies on the reactive power demand in the German transmission grid","authors":"Marie-Louise Kloubert, Christopher Spieker, J. Schwippe, U. Hager, C. Rehtanz, G. Blanco","doi":"10.1109/ISGTEUROPE.2014.7028956","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028956","url":null,"abstract":"The energy transition, which leads to shutdowns of conventional power plants with simultaneous expansion of renewable energy power plants, causes a strong change in the utilization of the transmission grid. It has to handle larger transport tasks, whereby the reactive power demand increases. At the same time fewer conventional power plants are available to balance the reactive power demand of the grid. In this paper, a model is presented to determine the reactive power demand in power transmission systems. In the simulation part the model is applied to Germany for the years 2011 and 2033 and the future development in the amount of locally needed reactive power supply is determined. Opportunities are identified to cover remaining reactive power demands, which cannot be provided by existing power plants. In an economic analysis these different reactive power sources are compared to supply the needed reactive power at minimal costs.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"6 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129150572","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028899
M. Ridzuan, I. Hernando‐Gil, S. Djokic, R. Langella, A. Testa
This is the second paper in a two-part series discussing how Regulator requirements for continuity of supply could be incorporated in the reliability analysis of existing electricity networks and future “smart grids”. Part 1 paper presents input data, parameters and models required for a comprehensive assessment of system reliability performance, including an overview of the overall and guaranteed standards of performance in the UK and Italy. This paper presents scenarios and results of both analytical and probabilistic reliability assessment procedures for the test network introduced in Part 1 paper.
{"title":"Incorporating regulator requirements in reliability analysis of smart grids. Part 2: Scenarios and results","authors":"M. Ridzuan, I. Hernando‐Gil, S. Djokic, R. Langella, A. Testa","doi":"10.1109/ISGTEUROPE.2014.7028899","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028899","url":null,"abstract":"This is the second paper in a two-part series discussing how Regulator requirements for continuity of supply could be incorporated in the reliability analysis of existing electricity networks and future “smart grids”. Part 1 paper presents input data, parameters and models required for a comprehensive assessment of system reliability performance, including an overview of the overall and guaranteed standards of performance in the UK and Italy. This paper presents scenarios and results of both analytical and probabilistic reliability assessment procedures for the test network introduced in Part 1 paper.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125649178","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028739
Shinn-Shyan Wu, Chen-Ching Liu, A. Ştefanov
Cybersecurity issues have raised concerns as potential loopholes exist in the Supervisory Control And Data Acquisition (SCADA) system when the system architecture moved from a proprietary to an open system. As a result of the interdependency between the power grids and SCADA communication networks, it is important to further strengthen the defense of cyber networks against malicious intrusions. The focus of this research is to model and evaluate a novel cybersecurity protection scheme using network firewall technology operated at the application layer to enhance the information protection in SCADA networks. A quantitative analysis is performed based on the attack and defense simulations on the SCADA cybersecurity testbed available at UCD. The preliminary test results elucidate the effectiveness of the proposed scheme and demonstrate the feasibility of the proposed scheme for enhancing information security of the substations.
{"title":"Distributed specification-based firewalls for power grid substations","authors":"Shinn-Shyan Wu, Chen-Ching Liu, A. Ştefanov","doi":"10.1109/ISGTEUROPE.2014.7028739","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028739","url":null,"abstract":"Cybersecurity issues have raised concerns as potential loopholes exist in the Supervisory Control And Data Acquisition (SCADA) system when the system architecture moved from a proprietary to an open system. As a result of the interdependency between the power grids and SCADA communication networks, it is important to further strengthen the defense of cyber networks against malicious intrusions. The focus of this research is to model and evaluate a novel cybersecurity protection scheme using network firewall technology operated at the application layer to enhance the information protection in SCADA networks. A quantitative analysis is performed based on the attack and defense simulations on the SCADA cybersecurity testbed available at UCD. The preliminary test results elucidate the effectiveness of the proposed scheme and demonstrate the feasibility of the proposed scheme for enhancing information security of the substations.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130761867","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 : 2014-10-01DOI: 10.1109/ISGTEUROPE.2014.7028846
Philipp Fortenbacher, Andreas Ulbig, S. Koch, G. Andersson
This paper presents a novel approach for the predictive power dispatch of a large number of power system units that can be diverse in their power as well as power ramp ratings and can be dispersed both in distribution grids and transmission networks. In particular, the involved unit portfolio consists of Renewable Energy sources (RES), conventional generation sources, flexible loads, and storage devices, which are modeled using the Power Nodes modeling framework. Unlike aggregation methods which do not consider the position of a power system unit in the grid topology, our centralized optimal power dispatch strategy with a combined AC Optimal Power Flow (AC-OPF) explicitly accounts for grid constraints. The multi-period dispatch problem induced by the energy storage devices is solved by a predictive power dispatch scheme based on Model Predictive Control (MPC). We further propose a distributed three-stage optimization process that hierarchically divides the original dispatch problem into independent sub-problems according to the grid structure which are solvable in parallel. As a result, we obtain a significant complexity reduction with respect to the original centralized dispatch optimization problem, such that we can calculate the power dispatch of a large number of units with reasonable computational effort. Finally, based on benchmark grids of different sizes, we demonstrate the improved performance of the here proposed distributed approach over the original centralized dispatch optimization approach and show that the simulation time is reduced for large systems as compared with the centralized approach.
{"title":"Grid-constrained optimal predictive power dispatch in large multi-level power systems with renewable energy sources, and storage devices","authors":"Philipp Fortenbacher, Andreas Ulbig, S. Koch, G. Andersson","doi":"10.1109/ISGTEUROPE.2014.7028846","DOIUrl":"https://doi.org/10.1109/ISGTEUROPE.2014.7028846","url":null,"abstract":"This paper presents a novel approach for the predictive power dispatch of a large number of power system units that can be diverse in their power as well as power ramp ratings and can be dispersed both in distribution grids and transmission networks. In particular, the involved unit portfolio consists of Renewable Energy sources (RES), conventional generation sources, flexible loads, and storage devices, which are modeled using the Power Nodes modeling framework. Unlike aggregation methods which do not consider the position of a power system unit in the grid topology, our centralized optimal power dispatch strategy with a combined AC Optimal Power Flow (AC-OPF) explicitly accounts for grid constraints. The multi-period dispatch problem induced by the energy storage devices is solved by a predictive power dispatch scheme based on Model Predictive Control (MPC). We further propose a distributed three-stage optimization process that hierarchically divides the original dispatch problem into independent sub-problems according to the grid structure which are solvable in parallel. As a result, we obtain a significant complexity reduction with respect to the original centralized dispatch optimization problem, such that we can calculate the power dispatch of a large number of units with reasonable computational effort. Finally, based on benchmark grids of different sizes, we demonstrate the improved performance of the here proposed distributed approach over the original centralized dispatch optimization approach and show that the simulation time is reduced for large systems as compared with the centralized approach.","PeriodicalId":299515,"journal":{"name":"IEEE PES Innovative Smart Grid Technologies, Europe","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130806600","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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