Pub Date : 2019-05-01DOI: 10.1109/ICPS.2019.8733340
Ming-Tse Kuo
As wind power generation technology has advanced, investment in the construction of wind farms has flourished, and the consequences of parallel connection of wind farms to the electric power transmission grid have become particularly important. The aim of this study is to analyze the effect of voltage-ampere reactive (VAR) compensators on improving the system stability of regional electric power transmission grids containing wind farms. A voltage stability analysis in coordination with appropriate search methods is performed to determine the optimal location and capacity in configuring these VAR compensators. In addition to the method proposed in this paper of simulating the eastern regional electric power system of the Taiwan Power Company (Taipower), the Electrical Transient Analysis Program (ETAP) is used to analyze the voltage distribution situation of the eastern regional electric power system, and Matrix Laboratory (MATLAB) and Power System Analysis Toolbox (PSAT) software are used to analyze wind farm integration and assess the influence of the static VAR compensator (SVC) and static synchronous compensator (STATCOM) on the system. The research results show that the STATCOM and the SVC can indeed effectively improve the dynamic characteristics of the system under the interference of faults, which can provide a reference and application for planning the configuration of VAR compensators and the analysis of wind power integration.
{"title":"Applying Reactive Power Compensators to Large Wind Farms to Improve the Stability of Isolated Power Systems","authors":"Ming-Tse Kuo","doi":"10.1109/ICPS.2019.8733340","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733340","url":null,"abstract":"As wind power generation technology has advanced, investment in the construction of wind farms has flourished, and the consequences of parallel connection of wind farms to the electric power transmission grid have become particularly important. The aim of this study is to analyze the effect of voltage-ampere reactive (VAR) compensators on improving the system stability of regional electric power transmission grids containing wind farms. A voltage stability analysis in coordination with appropriate search methods is performed to determine the optimal location and capacity in configuring these VAR compensators. In addition to the method proposed in this paper of simulating the eastern regional electric power system of the Taiwan Power Company (Taipower), the Electrical Transient Analysis Program (ETAP) is used to analyze the voltage distribution situation of the eastern regional electric power system, and Matrix Laboratory (MATLAB) and Power System Analysis Toolbox (PSAT) software are used to analyze wind farm integration and assess the influence of the static VAR compensator (SVC) and static synchronous compensator (STATCOM) on the system. The research results show that the STATCOM and the SVC can indeed effectively improve the dynamic characteristics of the system under the interference of faults, which can provide a reference and application for planning the configuration of VAR compensators and the analysis of wind power integration.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116280899","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 : 2019-05-01DOI: 10.1109/ICPS.2019.8733379
Duclair Tiomo, Emmanuel Ymele Kenfack, R. Wamkeue
In this paper, dynamic electromechanical equations of the synchronous generator (SG) are reviewed to provide insight on its behavior under different operating and test conditions. The response of the SG under these conditions is discussed and ways to determine transient and sub-transient parameters from the classical model are presented. A simplified approach for estimating SG parameters is then proposed and applied to a 1.5kVA-208V 60Hz synchronous machine whose d-axis parameters are identified through Sudden short circuit and load rejection tests made in laboratory.
{"title":"Dynamic Study and Analysis of Synchronous Generator under Sudden Short Circuit and Load Rejection Tests","authors":"Duclair Tiomo, Emmanuel Ymele Kenfack, R. Wamkeue","doi":"10.1109/ICPS.2019.8733379","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733379","url":null,"abstract":"In this paper, dynamic electromechanical equations of the synchronous generator (SG) are reviewed to provide insight on its behavior under different operating and test conditions. The response of the SG under these conditions is discussed and ways to determine transient and sub-transient parameters from the classical model are presented. A simplified approach for estimating SG parameters is then proposed and applied to a 1.5kVA-208V 60Hz synchronous machine whose d-axis parameters are identified through Sudden short circuit and load rejection tests made in laboratory.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125792912","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 : 2019-05-01DOI: 10.1109/ICPS.2019.8733380
Yu Wang, Yan Xu, Zhengmao Li, T. Nguyen, R. Caire, Q. Tran
Microgrid is a complex cyber-physical system with interacted power and communication networks. Conventionally, the secondary control of microgrids relies on a central controller and periodic communications, which may limit the efficiency and resilience of the cyber systems. In this paper, a distributed event-triggered secondary control scheme is proposed for efficient communication in islanded microgrids. The proposed control scheme only takes effect when there are microgrid states change ‘events' (e.g load changes and communication failures). The secondary control including frequency/voltage regulation and accurate real/reactive power sharing are decoupled into two timescales. The triggering conditions for only power sharing control in slower timescale are defined to avoid overlap. The proposed method only requires communications among neighbour controllers at the event-triggered time, which dramatically reduces the communication burden in the cyber system. A cyber-physical microgrid platform has been built with the microgrids in OPAL-RT and communications in Raspberry Pis. The proposed secondary controller has been implemented on this platform and the hardware-in-the-loop (HiL) experiment results demonstrate the performance of our controller design.
{"title":"Distributed Event-Triggered Control for Islanded Microgrids: Cyber-Physical Design and Implementation","authors":"Yu Wang, Yan Xu, Zhengmao Li, T. Nguyen, R. Caire, Q. Tran","doi":"10.1109/ICPS.2019.8733380","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733380","url":null,"abstract":"Microgrid is a complex cyber-physical system with interacted power and communication networks. Conventionally, the secondary control of microgrids relies on a central controller and periodic communications, which may limit the efficiency and resilience of the cyber systems. In this paper, a distributed event-triggered secondary control scheme is proposed for efficient communication in islanded microgrids. The proposed control scheme only takes effect when there are microgrid states change ‘events' (e.g load changes and communication failures). The secondary control including frequency/voltage regulation and accurate real/reactive power sharing are decoupled into two timescales. The triggering conditions for only power sharing control in slower timescale are defined to avoid overlap. The proposed method only requires communications among neighbour controllers at the event-triggered time, which dramatically reduces the communication burden in the cyber system. A cyber-physical microgrid platform has been built with the microgrids in OPAL-RT and communications in Raspberry Pis. The proposed secondary controller has been implemented on this platform and the hardware-in-the-loop (HiL) experiment results demonstrate the performance of our controller design.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121848872","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 : 2019-05-01DOI: 10.1109/ICPS.2019.8733326
Mohannad Alhazmi, P. Dehghanian, Shiyuan Wang, B. Shinde
This paper presents a probabilistic formulation and solution technique for the application of DC optimal power flow (DCOPF)-based network topology control through the transmission line switching strategies. Efficient utilization of the point estimation method (PEM) is pursued to model the system uncertainties, i.e., the stochastic load profile and the intermittent renewable generation. In order to address the computational effectiveness of the suggested probabilistic methodology, the PEM formulation is harnessed by a scenario reduction approach to capture the correlations of the system uncertainties, thereby achieving a more robust and faster operation solution for day-ahead and real-time applications. The proposed approach is applied to a modified IEEE 118-bus test system, where it demonstrates its attractive performance under different test scenarios.
{"title":"Power Grid Optimal Topology Control Considering Correlations of System Uncertainties","authors":"Mohannad Alhazmi, P. Dehghanian, Shiyuan Wang, B. Shinde","doi":"10.1109/ICPS.2019.8733326","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733326","url":null,"abstract":"This paper presents a probabilistic formulation and solution technique for the application of DC optimal power flow (DCOPF)-based network topology control through the transmission line switching strategies. Efficient utilization of the point estimation method (PEM) is pursued to model the system uncertainties, i.e., the stochastic load profile and the intermittent renewable generation. In order to address the computational effectiveness of the suggested probabilistic methodology, the PEM formulation is harnessed by a scenario reduction approach to capture the correlations of the system uncertainties, thereby achieving a more robust and faster operation solution for day-ahead and real-time applications. The proposed approach is applied to a modified IEEE 118-bus test system, where it demonstrates its attractive performance under different test scenarios.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"92 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132276578","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 : 2019-05-01DOI: 10.1109/ICPS.2019.8733349
X. Ge, Kangping Li, Fei Wang, Zengqiang Mi
In a typical electricity market, the load aggregator (LA) bids in the wholesale market to purchase electricity and meet the expected demand of its customers in the retail market. However, given that the uncertainty of the wholesale market prices (WMPs), the LA has to undertake all the risk caused by the price volatility in the wholesale market, which makes the LA may fall into loss in some cases such as price spike. To this end, firstly, this paper proposes an optimal bidding strategy model for the LA that implements the demand response program (DRP), which enables the LA to reduce the risk of profit loss caused by price volatility. The bidding model is a mixed integer linear programming (MILP) problem, which can be solved efficiently. Secondly, making a rational and quantitative compensation mechanism is significant for the LA to induce its customers to participate in DRP while there are few studies investigating it, hence, this paper designs a quantitative compensation mechanism for the LA. Case studies using a dataset from the Thames valley vision (TVV) verify the effectiveness of the proposed bidding model. Besides, the results show that all entities in the electricity market enable to obtain benefits through the implementation of DRP.
{"title":"Day-ahead Market Optimal Bidding Strategy and Quantitative Compensation Mechanism Design for Load Aggregator Engaging Demand Response","authors":"X. Ge, Kangping Li, Fei Wang, Zengqiang Mi","doi":"10.1109/ICPS.2019.8733349","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733349","url":null,"abstract":"In a typical electricity market, the load aggregator (LA) bids in the wholesale market to purchase electricity and meet the expected demand of its customers in the retail market. However, given that the uncertainty of the wholesale market prices (WMPs), the LA has to undertake all the risk caused by the price volatility in the wholesale market, which makes the LA may fall into loss in some cases such as price spike. To this end, firstly, this paper proposes an optimal bidding strategy model for the LA that implements the demand response program (DRP), which enables the LA to reduce the risk of profit loss caused by price volatility. The bidding model is a mixed integer linear programming (MILP) problem, which can be solved efficiently. Secondly, making a rational and quantitative compensation mechanism is significant for the LA to induce its customers to participate in DRP while there are few studies investigating it, hence, this paper designs a quantitative compensation mechanism for the LA. Case studies using a dataset from the Thames valley vision (TVV) verify the effectiveness of the proposed bidding model. Besides, the results show that all entities in the electricity market enable to obtain benefits through the implementation of DRP.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133313500","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 : 2019-05-01DOI: 10.1109/ICPS.2019.8733329
Zhenyuan Zhang, Peng Wang, Shiuan-Hau Rau, Weijen Lee
In arc flash hazards studies, protection boundary are able to be used to gain insight in personnel protection against to thermal injuries. However, while IEEE 1584–2002 has provided the hazards calculation based on tests with the arcing electrodes in a vertical plane, applications where the vertical arrangement is not directly applicable is drawing more attentions in past few years. Due to the varied thermal behaviors of arc occurred in different configuration of the equipment and the varied bus connection mode, to adequately protect a worker from thermal injury, it is necessary to analyze the effect of different electrode geometry on arc flash protection boundary. This paper fully discussed the impact of electrode geometry on incident energy exposure level and AFPB. With the multiple electrode geometry designed tests, thermal behaviors of arc under different configurations has been analyzed. According to test results, correction equations were derived under each typical electrode geometry to adjust the AFPC calculation of IEEE 1584–2002. Through the comparisons, the corrected model can better reflect the actual effects of electrode geometry, meanwhile showing a good ability to provide the reasonable AFPB for practical uses.
{"title":"Effect of Electrode Geometry on Arc Flash Protection Boundary","authors":"Zhenyuan Zhang, Peng Wang, Shiuan-Hau Rau, Weijen Lee","doi":"10.1109/ICPS.2019.8733329","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733329","url":null,"abstract":"In arc flash hazards studies, protection boundary are able to be used to gain insight in personnel protection against to thermal injuries. However, while IEEE 1584–2002 has provided the hazards calculation based on tests with the arcing electrodes in a vertical plane, applications where the vertical arrangement is not directly applicable is drawing more attentions in past few years. Due to the varied thermal behaviors of arc occurred in different configuration of the equipment and the varied bus connection mode, to adequately protect a worker from thermal injury, it is necessary to analyze the effect of different electrode geometry on arc flash protection boundary. This paper fully discussed the impact of electrode geometry on incident energy exposure level and AFPB. With the multiple electrode geometry designed tests, thermal behaviors of arc under different configurations has been analyzed. According to test results, correction equations were derived under each typical electrode geometry to adjust the AFPC calculation of IEEE 1584–2002. Through the comparisons, the corrected model can better reflect the actual effects of electrode geometry, meanwhile showing a good ability to provide the reasonable AFPB for practical uses.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"101 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132545864","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 : 2019-05-01DOI: 10.1109/ICPS.2019.8733363
A. Prajapati, R. Arno, N. Dowling, W. Moylan
This article presents an idea of achieving reliability through Industrial Internet of Things (IIoT) for industrial power systems. It proposes hybrid approach for predictive and corrective maintenance. It discusses the self-corrective maintenance (SCM) paradigm as hybrid approach for industrial power systems along with condition-based maintenance approach utilizing IIoT to achieve it. As it is well known that industries pay huge penalty for the down time, and suffer to meet reliability demands for years. Study witnesses its cost in millions of dollars yearly for production disruptions. It can be prevented by proactively following the aggressive maintenance schedule. However, it often becomes expensive as part or service may not be utilized for its full life and failure may occur even in middle of maintenance cycle. On the other hand, condition-based maintenance (CBM) helps utilize the full life and prevents the downtime by predicting the failures ahead. This article reviews current maintenance practices followed by industry leaders and a proposal on self-corrective maintenance based on condition of restorable resources. It is about learning the condition of subsystems by itself and taking corrective action when subsystem is not active. This concept helps reduce manual intervention to correct the problem as well as the maintenance cost. This research also covers the self-uncorrectable issues to be handled by proactively following CBM process through IIoT. This hybrid proposal could be a significant gear shift in maintenance direction for general industry as well as power systems. It can be termed as industry's 5th revolution or Industry 5.0.
{"title":"Enhancing Reliability of Power Systems through IIoT - Survey and Proposal","authors":"A. Prajapati, R. Arno, N. Dowling, W. Moylan","doi":"10.1109/ICPS.2019.8733363","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733363","url":null,"abstract":"This article presents an idea of achieving reliability through Industrial Internet of Things (IIoT) for industrial power systems. It proposes hybrid approach for predictive and corrective maintenance. It discusses the self-corrective maintenance (SCM) paradigm as hybrid approach for industrial power systems along with condition-based maintenance approach utilizing IIoT to achieve it. As it is well known that industries pay huge penalty for the down time, and suffer to meet reliability demands for years. Study witnesses its cost in millions of dollars yearly for production disruptions. It can be prevented by proactively following the aggressive maintenance schedule. However, it often becomes expensive as part or service may not be utilized for its full life and failure may occur even in middle of maintenance cycle. On the other hand, condition-based maintenance (CBM) helps utilize the full life and prevents the downtime by predicting the failures ahead. This article reviews current maintenance practices followed by industry leaders and a proposal on self-corrective maintenance based on condition of restorable resources. It is about learning the condition of subsystems by itself and taking corrective action when subsystem is not active. This concept helps reduce manual intervention to correct the problem as well as the maintenance cost. This research also covers the self-uncorrectable issues to be handled by proactively following CBM process through IIoT. This hybrid proposal could be a significant gear shift in maintenance direction for general industry as well as power systems. It can be termed as industry's 5th revolution or Industry 5.0.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126049229","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 : 2019-05-01DOI: 10.1109/ICPS.2019.8733378
A. Bidram, Lakshmisree Damodaran, R. Fierro
In this paper, the cybersecurity of distributed secondary voltage control of AC microgrids is addressed. A resilient approach is proposed to mitigate the negative impacts of cyberthreats on the voltage and reactive power control of Distributed Energy Resources (DERs). The proposed secondary voltage control is inspired by the resilient flocking of a mobile robot team. This approach utilizes a virtual time-varying communication graph in which the quality of the communication links is virtualized and determined based on the synchronization behavior of DERs. The utilized control protocols on DERs ensure that the connectivity of the virtual communication graph is above a specific resilience threshold. Once the resilience threshold is satisfied the Weighted Mean Subsequence Reduced (WMSR) algorithm is applied to satisfy voltage restoration in the presence of malicious adversaries. A typical microgrid test system including 6 DERs is simulated to verify the validity of proposed resilient control approach.
{"title":"Cybersecure Distributed Voltage Control of AC Microgrids","authors":"A. Bidram, Lakshmisree Damodaran, R. Fierro","doi":"10.1109/ICPS.2019.8733378","DOIUrl":"https://doi.org/10.1109/ICPS.2019.8733378","url":null,"abstract":"In this paper, the cybersecurity of distributed secondary voltage control of AC microgrids is addressed. A resilient approach is proposed to mitigate the negative impacts of cyberthreats on the voltage and reactive power control of Distributed Energy Resources (DERs). The proposed secondary voltage control is inspired by the resilient flocking of a mobile robot team. This approach utilizes a virtual time-varying communication graph in which the quality of the communication links is virtualized and determined based on the synchronization behavior of DERs. The utilized control protocols on DERs ensure that the connectivity of the virtual communication graph is above a specific resilience threshold. Once the resilience threshold is satisfied the Weighted Mean Subsequence Reduced (WMSR) algorithm is applied to satisfy voltage restoration in the presence of malicious adversaries. A typical microgrid test system including 6 DERs is simulated to verify the validity of proposed resilient control approach.","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"223 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117176383","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 : 2019-05-01DOI: 10.1109/icps.2019.8733321
{"title":"Copyright","authors":"","doi":"10.1109/icps.2019.8733321","DOIUrl":"https://doi.org/10.1109/icps.2019.8733321","url":null,"abstract":"","PeriodicalId":160476,"journal":{"name":"2019 IEEE/IAS 55th Industrial and Commercial Power Systems Technical Conference (I&CPS)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128002565","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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