Pub Date : 2018-10-01DOI: 10.1109/ACEPT.2018.8610762
Yu Wang, Weitao Yao, Chengquan Ju, S. Wen, Yan Xu, Yi Tang
In this paper, a distributed secondary control scheme of energy storage systems (ESSs) in islanded alternative current (AC) microgrids has been proposed. In order to investigate the secondary control of AC microgrids, a microgrid prototype and its associated hierarchical control have been built. As the foundation, the primary control including voltage and current control loops, droop control and virtual impedance has been developed first. Then, the microgrid secondary control functionalities including frequency restoration, voltage restoration as well as state-of-charge balancing of ESSs have been achieved in a distributed way. A novel distributed secondary control scheme for islanded AC microgrid has been proposed. Compared with centralized approach, only peer-to-peer communication is required by proposed the secondary control. The proposed control scheme is robust against communication failures, so that the cyber resilience of the microgrid control is enhanced. The proposed method is evaluated in the established Matlab/Simulink model and the results validate the effectiveness of the proposed method.
{"title":"Distributed Secondary Control of Energy Storage Systems in Islanded AC Microgrids","authors":"Yu Wang, Weitao Yao, Chengquan Ju, S. Wen, Yan Xu, Yi Tang","doi":"10.1109/ACEPT.2018.8610762","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610762","url":null,"abstract":"In this paper, a distributed secondary control scheme of energy storage systems (ESSs) in islanded alternative current (AC) microgrids has been proposed. In order to investigate the secondary control of AC microgrids, a microgrid prototype and its associated hierarchical control have been built. As the foundation, the primary control including voltage and current control loops, droop control and virtual impedance has been developed first. Then, the microgrid secondary control functionalities including frequency restoration, voltage restoration as well as state-of-charge balancing of ESSs have been achieved in a distributed way. A novel distributed secondary control scheme for islanded AC microgrid has been proposed. Compared with centralized approach, only peer-to-peer communication is required by proposed the secondary control. The proposed control scheme is robust against communication failures, so that the cyber resilience of the microgrid control is enhanced. The proposed method is evaluated in the established Matlab/Simulink model and the results validate the effectiveness of the proposed method.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","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":"122849445","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/ACEPT.2018.8610845
Dong-hyun Lim, Byoung-Sun Ko, Rae-Young Kim
An improved distributed control is proposed for enhancing a flexibility of changing the control strategy depending on the dc microgrid situation. The conventional distributed control has the limitation of changing control strategy because of its control method. In the proposed control method, a local controller of conventional distributed control divided into two layers. First, the local layer performs inner voltage and current loops. Second, the flexible layer performs the primary and secondary control. Since the flexible layer performs most of the control for operating dc microgrid, the control strategy can be changed easily by changing the primary and secondary control in this layer. Moreover, the burden of data processing at the local controller is reduced through the flexible layer of the proposed method. Therefore, it becomes easy to manufacture converters in multi-vendor without control platform standardization. The experimental results based on Typhoon HIL 402 are presented to demonstrate the proposed approach.
{"title":"A Verification of Improved Distributed Control in DC Microgrid based on Hardware-in-the-loop Simulation","authors":"Dong-hyun Lim, Byoung-Sun Ko, Rae-Young Kim","doi":"10.1109/ACEPT.2018.8610845","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610845","url":null,"abstract":"An improved distributed control is proposed for enhancing a flexibility of changing the control strategy depending on the dc microgrid situation. The conventional distributed control has the limitation of changing control strategy because of its control method. In the proposed control method, a local controller of conventional distributed control divided into two layers. First, the local layer performs inner voltage and current loops. Second, the flexible layer performs the primary and secondary control. Since the flexible layer performs most of the control for operating dc microgrid, the control strategy can be changed easily by changing the primary and secondary control in this layer. Moreover, the burden of data processing at the local controller is reduced through the flexible layer of the proposed method. Therefore, it becomes easy to manufacture converters in multi-vendor without control platform standardization. The experimental results based on Typhoon HIL 402 are presented to demonstrate the proposed approach.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","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":"124538531","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/ACEPT.2018.8610867
Jinhao Wang, Shengwen Li, Shifeng Zhang, Ming Huang, Xiao Chang, Ming Wei, Runquan Meng, Lei Wang, Han Gao, Qi Wang, L. Koh, Jianfang Xiao, Peng Wang
Aiming at the faults pass-through between the distribution network and the AC-DC hybrid micro-grid (HMG), this paper proposes a concept of the series compensation link (SCL) which has been inserted between a distribution network and a AC-DC HMG to compensate HMG voltage and limit excessive fault current as well. The basic structure and operation modes of the SCL are introduced firstly. Then, based on deriving the mathematical models of the SCL in abc-three-phase coordinate frame and in dq synchronous rotation coordinate frame, a compound compensation and current limiting strategy is designed. A series compensation transformer (SCT) is designed. Finally, the effectiveness of the SCL and its control strategy have been verified by simulations.
{"title":"Research on the Link for Fault Current Limiting and Voltage Compensation between Hybrid Micro-Grid and Distribution Network","authors":"Jinhao Wang, Shengwen Li, Shifeng Zhang, Ming Huang, Xiao Chang, Ming Wei, Runquan Meng, Lei Wang, Han Gao, Qi Wang, L. Koh, Jianfang Xiao, Peng Wang","doi":"10.1109/ACEPT.2018.8610867","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610867","url":null,"abstract":"Aiming at the faults pass-through between the distribution network and the AC-DC hybrid micro-grid (HMG), this paper proposes a concept of the series compensation link (SCL) which has been inserted between a distribution network and a AC-DC HMG to compensate HMG voltage and limit excessive fault current as well. The basic structure and operation modes of the SCL are introduced firstly. Then, based on deriving the mathematical models of the SCL in abc-three-phase coordinate frame and in dq synchronous rotation coordinate frame, a compound compensation and current limiting strategy is designed. A series compensation transformer (SCT) is designed. Finally, the effectiveness of the SCL and its control strategy have been verified by simulations.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"25 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":"117225483","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/ACEPT.2018.8610817
Xiao Chang, Chenxv Lv, Qi Wang, W. Qin, Min Zhang, Yizhao Liu, Rui Fan
The quasi-proportional resonance feedforward (QPRF) control strategy was proposed to enhanced the robust ability of LCL-type grid connected in weak grid condition. The equivalent circuit model was developed and impedance analysis method(IAM) was adopted to analyze the stability of the control system. The gain at low frequency and the phase margin at cutoff frequency were detailed analyzed compared with the traditional proportional feedforward (PF) strategy in this paper. It was obtained that the robust ability of QPRF was enhanced than PF. And the gain of low frequency was ensured. Finally, results of simulation were given to verify the validity and feasibility of the proposed strategy.
{"title":"Robust Voltage Resonance Feedforward Control Strategy for LCL-type Grid-connected Inverters under Weak Grid Condition","authors":"Xiao Chang, Chenxv Lv, Qi Wang, W. Qin, Min Zhang, Yizhao Liu, Rui Fan","doi":"10.1109/ACEPT.2018.8610817","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610817","url":null,"abstract":"The quasi-proportional resonance feedforward (QPRF) control strategy was proposed to enhanced the robust ability of LCL-type grid connected in weak grid condition. The equivalent circuit model was developed and impedance analysis method(IAM) was adopted to analyze the stability of the control system. The gain at low frequency and the phase margin at cutoff frequency were detailed analyzed compared with the traditional proportional feedforward (PF) strategy in this paper. It was obtained that the robust ability of QPRF was enhanced than PF. And the gain of low frequency was ensured. Finally, results of simulation were given to verify the validity and feasibility of the proposed strategy.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"7 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":"122362303","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/ACEPT.2018.8610784
Liqing Liang, Yangwu Shen, Bin Zhang, Xiao-fei Sun, Kai Liao, Yan Xu
Increasing penetration level of wind power integration has a significant impact on the operation of power system. Therefore, the study of the influence of the wind power on the loss of the power system has become an important issue of concern. A wind farm based on doubly fed induction generator (DFIG) is molded to study the issue. The WSCC 3-machine 9-bus system is employed to analysis the influence of the wind power. The loss of each bus is estimate by simulation. The study shows that, for an actual power system the wind power capacity should be fixed by the practical situation to decrease the loss of the system.
{"title":"The Influence on Power System Loss from Large-Scale Wind Farm Integration","authors":"Liqing Liang, Yangwu Shen, Bin Zhang, Xiao-fei Sun, Kai Liao, Yan Xu","doi":"10.1109/ACEPT.2018.8610784","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610784","url":null,"abstract":"Increasing penetration level of wind power integration has a significant impact on the operation of power system. Therefore, the study of the influence of the wind power on the loss of the power system has become an important issue of concern. A wind farm based on doubly fed induction generator (DFIG) is molded to study the issue. The WSCC 3-machine 9-bus system is employed to analysis the influence of the wind power. The loss of each bus is estimate by simulation. The study shows that, for an actual power system the wind power capacity should be fixed by the practical situation to decrease the loss of the system.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"6 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":"115974128","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/ACEPT.2018.8610804
C. Mackie, D. Nash, D. Boyce, M. Wright, K. Dyer
Leading edge erosion is an issue that is affecting many offshore wind turbines. However it is currently unclear the damage mechanism that is initiating and propagating the erosion. The characterisation work carried out at the test rig in the Energy Technology Centre is providing a greater understanding on the droplet impacts, droplet diameters and droplet trajectories. From this work it has been determined that avoiding operating the test rig at the highest rotational speeds improves the droplet control. The preferable standoff height was investigated as a DNV GL standard stated a minimum height of 200mm. Through work with a high speed camera it was determined that the optimum standoff height was 50mm for the ETC rig, due to the use of shrouds. The characterisation work carried out provides a greater knowledge on the droplet impacts however future work should be carried out to increase the sample size to provide clearer results.
{"title":"Characterisation of a Whirling Arm Erosion Test Rig","authors":"C. Mackie, D. Nash, D. Boyce, M. Wright, K. Dyer","doi":"10.1109/ACEPT.2018.8610804","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610804","url":null,"abstract":"Leading edge erosion is an issue that is affecting many offshore wind turbines. However it is currently unclear the damage mechanism that is initiating and propagating the erosion. The characterisation work carried out at the test rig in the Energy Technology Centre is providing a greater understanding on the droplet impacts, droplet diameters and droplet trajectories. From this work it has been determined that avoiding operating the test rig at the highest rotational speeds improves the droplet control. The preferable standoff height was investigated as a DNV GL standard stated a minimum height of 200mm. Through work with a high speed camera it was determined that the optimum standoff height was 50mm for the ETC rig, due to the use of shrouds. The characterisation work carried out provides a greater knowledge on the droplet impacts however future work should be carried out to increase the sample size to provide clearer results.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"19 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":"121175013","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/ACEPT.2018.8610866
D. Molligoda, J. Pou, C. Gajanayake, A.K. Gupta
The Vienna rectifier is an attractive topology due to the three-level voltage generation and its simplicity compared to other converter solutions. The Vienna rectifier generates voltage and current waveforms with low distortion under unity power factor operation. However, when the reference voltages and the grid currents are not in phase, the output voltages become distorted and therefore the grid currents as well. This paper evaluates the distortions produced due to nonunity power factor operation in the Vienna rectifier. It also discusses on possible solutions to mitigate the problem and evaluates their effectiveness and limitations.
{"title":"Analysis of the Vienna Rectifier under Nonunity Power Factor Operation","authors":"D. Molligoda, J. Pou, C. Gajanayake, A.K. Gupta","doi":"10.1109/ACEPT.2018.8610866","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610866","url":null,"abstract":"The Vienna rectifier is an attractive topology due to the three-level voltage generation and its simplicity compared to other converter solutions. The Vienna rectifier generates voltage and current waveforms with low distortion under unity power factor operation. However, when the reference voltages and the grid currents are not in phase, the output voltages become distorted and therefore the grid currents as well. This paper evaluates the distortions produced due to nonunity power factor operation in the Vienna rectifier. It also discusses on possible solutions to mitigate the problem and evaluates their effectiveness and limitations.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"48 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":"129210823","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/ACEPT.2018.8610715
Jinhao Wang, Manghu Wang, Huipeng Li, W. Qin, Lei Wang
The intermittent and stochastic of renewable energy has brought great challenges to power system. Its fluctuation can be stabilized effectively by the microgrid including energy storage devices. In this paper, an energy management strategy for microgrid integrated with hybrid energy storage which contains lithium battery and super capacitor is proposed. Basing on the real-time running status of renewable energy and energy storage devices, the operation of the hybrid energy storage system is adjusted. In this way, the output of the renewable energy and the exchanging power between microgrid and the main grid can be stabilized. Furthermore, the cycle life of the hybrid energy storage devices will be longer and the operating costs of renewable energy (or microgrid) can be saved. Experimental results show that the proposed microgrid energy management strategy is feasible.
{"title":"Energy Management Strategy for Microgrid Including Hybrid Energy Storage","authors":"Jinhao Wang, Manghu Wang, Huipeng Li, W. Qin, Lei Wang","doi":"10.1109/ACEPT.2018.8610715","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610715","url":null,"abstract":"The intermittent and stochastic of renewable energy has brought great challenges to power system. Its fluctuation can be stabilized effectively by the microgrid including energy storage devices. In this paper, an energy management strategy for microgrid integrated with hybrid energy storage which contains lithium battery and super capacitor is proposed. Basing on the real-time running status of renewable energy and energy storage devices, the operation of the hybrid energy storage system is adjusted. In this way, the output of the renewable energy and the exchanging power between microgrid and the main grid can be stabilized. Furthermore, the cycle life of the hybrid energy storage devices will be longer and the operating costs of renewable energy (or microgrid) can be saved. Experimental results show that the proposed microgrid energy management strategy is feasible.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"96 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":"130243595","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/ACEPT.2018.8610707
K. Mallard, L. Garbuio, V. Debusschere
Having an access to electricity wherever you live has not been achieved yet. Developing countries and especially isolated places are still pursuing this goal in order to assure a multi-faceted development. Among isolated regions, remote coastal locations are likely to rely on energetic resources available around: they may use ocean energy which is abundant and available in several forms. Existing marine technologies today fit more industrialized countries’ needs than those of isolated places. Remote coastal locations demand specific solutions based on renewable marine energies in order to develop sustainably. We propose a multi-criteria method assessment for decision support: taking various criteria into account (technical, economic, environmental and social domains), this process helps project coordinators and decision-makers in finding the optimal energy solution. From the design phase, the severe constraints associated with remote coastal locations lead to original specifications like simple, robust, reliable, maintainable system, different from the habitual ‘most efficient at the lowest price’ solution. Those systems, belonging to low technology category, do not only provide an electricity supply, they give as well energy self-sufficiency, sustainability and resilience. Tidal energy with in-stream turbine is a case study for our multi-criteria assessment method.
{"title":"Multi-criteria Assessment Method on Energy Solution for Decision Support in Remote Coastal Locations","authors":"K. Mallard, L. Garbuio, V. Debusschere","doi":"10.1109/ACEPT.2018.8610707","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610707","url":null,"abstract":"Having an access to electricity wherever you live has not been achieved yet. Developing countries and especially isolated places are still pursuing this goal in order to assure a multi-faceted development. Among isolated regions, remote coastal locations are likely to rely on energetic resources available around: they may use ocean energy which is abundant and available in several forms. Existing marine technologies today fit more industrialized countries’ needs than those of isolated places. Remote coastal locations demand specific solutions based on renewable marine energies in order to develop sustainably. We propose a multi-criteria method assessment for decision support: taking various criteria into account (technical, economic, environmental and social domains), this process helps project coordinators and decision-makers in finding the optimal energy solution. From the design phase, the severe constraints associated with remote coastal locations lead to original specifications like simple, robust, reliable, maintainable system, different from the habitual ‘most efficient at the lowest price’ solution. Those systems, belonging to low technology category, do not only provide an electricity supply, they give as well energy self-sufficiency, sustainability and resilience. Tidal energy with in-stream turbine is a case study for our multi-criteria assessment method.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","volume":"50 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":"131380839","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/ACEPT.2018.8610840
Leonardy Setyawan, James Tan, Shuya Ding, Eric Raynaud, H. Jing
A multi-energy system that controls the generation and storage of different types of energy offers great potential for improving the overall system efficiency and operating cost. The economic dispatch problem for multi-energy systems is to find the optimal system configuration that satisfies the demands under a host of constraints. The problem is often formulated as a mixed integer programming problem, which is very hard to solve since the number of variables involved could be in the order of hundreds. The difficulty of the problem is further compounded when model predictive control is implemented because the set points for controlling the multi-energy system at each time step have to be modeled, drastically increasing the number of variables in the optimization problem. In this paper, a large-scale hybrid optimization strategy is proposed to solve the economic dispatch in a multi-energy management system. Mixed-integer linear programming is used to solve a linearly approximated problem to determine the discrete set points followed by nonlinear programming for the continuous variables. We compare different optimization methods for the nonlinear programming problem with respect to the computational time and cost savings. The cost savings is also compared to a rule-based economic dispatch as the baseline. The simulation is performed using the data obtained from an office building in an R modeling and data management environment. We show that the proposed optimization strategy is able to solve the economic dispatch problem of a multi-energy management system with 720 mixed-integer variables within a short timeframe while still accounting for the nonlinearity of the optimization problem.
{"title":"Large-Scale Modeling and Optimization Strategy for Multi-Energy Management Systems","authors":"Leonardy Setyawan, James Tan, Shuya Ding, Eric Raynaud, H. Jing","doi":"10.1109/ACEPT.2018.8610840","DOIUrl":"https://doi.org/10.1109/ACEPT.2018.8610840","url":null,"abstract":"A multi-energy system that controls the generation and storage of different types of energy offers great potential for improving the overall system efficiency and operating cost. The economic dispatch problem for multi-energy systems is to find the optimal system configuration that satisfies the demands under a host of constraints. The problem is often formulated as a mixed integer programming problem, which is very hard to solve since the number of variables involved could be in the order of hundreds. The difficulty of the problem is further compounded when model predictive control is implemented because the set points for controlling the multi-energy system at each time step have to be modeled, drastically increasing the number of variables in the optimization problem. In this paper, a large-scale hybrid optimization strategy is proposed to solve the economic dispatch in a multi-energy management system. Mixed-integer linear programming is used to solve a linearly approximated problem to determine the discrete set points followed by nonlinear programming for the continuous variables. We compare different optimization methods for the nonlinear programming problem with respect to the computational time and cost savings. The cost savings is also compared to a rule-based economic dispatch as the baseline. The simulation is performed using the data obtained from an office building in an R modeling and data management environment. We show that the proposed optimization strategy is able to solve the economic dispatch problem of a multi-energy management system with 720 mixed-integer variables within a short timeframe while still accounting for the nonlinearity of the optimization problem.","PeriodicalId":296432,"journal":{"name":"2018 Asian Conference on Energy, Power and Transportation Electrification (ACEPT)","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":"130918594","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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