Pub Date : 2022-05-09DOI: 10.1109/energycon53164.2022.9830320
Evelin Blom, L. Söder
Simplified models of hydropower systems are necessary for simulation of large power systems, long-term analysis, and future studies. One common simplification has been to aggregate all hydropower within an area based on historical data. Another option is to use mathematical so-caned hydropower Equivalents. Here, hydropower Equivalents represent an optimized model reduction of a more Detailed model depicting the complete hydropower system within a specific area. These Equivalents are computed based on a bilevel optimization problem formulation. In this paper, the impact different Equivalent model constraints have on the performance is analyzed via a novel investigation of new model formulations. Moreover, recent solution methods and a baseline aggregation of the hydropower from statistics are compared and evaluated for the first time. All bilevel Equivalents show a significantly better performance than the baseline aggregation; the accuracy in hourly power generation relative to the Detailed model is almost twice as high for all bilevel Eqmvalents.
{"title":"Comparison of Different Computational Methods and Formulations for Hydropower Equivalents","authors":"Evelin Blom, L. Söder","doi":"10.1109/energycon53164.2022.9830320","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830320","url":null,"abstract":"Simplified models of hydropower systems are necessary for simulation of large power systems, long-term analysis, and future studies. One common simplification has been to aggregate all hydropower within an area based on historical data. Another option is to use mathematical so-caned hydropower Equivalents. Here, hydropower Equivalents represent an optimized model reduction of a more Detailed model depicting the complete hydropower system within a specific area. These Equivalents are computed based on a bilevel optimization problem formulation. In this paper, the impact different Equivalent model constraints have on the performance is analyzed via a novel investigation of new model formulations. Moreover, recent solution methods and a baseline aggregation of the hydropower from statistics are compared and evaluated for the first time. All bilevel Equivalents show a significantly better performance than the baseline aggregation; the accuracy in hourly power generation relative to the Detailed model is almost twice as high for all bilevel Eqmvalents.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125296467","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830244
A. Mazakova, Sholpan Jomartova, T. Mazakov, Timur Shormanov, B. Amirkhanov
The article deals with the problem of analyzing the controllability of an unmanned aerial vehicle based on interval analysis, computer algebra. On the basis of interval mathematics, a criterion for the controllability of the system under study was obtained. When developing the software, the library of interval mathematics was used. The developed software that implements the introduced interval arithmetic operations can be used in the study of the dynamic properties of automatic control systems, energy, economic and other nonlinear systems.
{"title":"Controllability of an unmanned aerial vehicle","authors":"A. Mazakova, Sholpan Jomartova, T. Mazakov, Timur Shormanov, B. Amirkhanov","doi":"10.1109/energycon53164.2022.9830244","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830244","url":null,"abstract":"The article deals with the problem of analyzing the controllability of an unmanned aerial vehicle based on interval analysis, computer algebra. On the basis of interval mathematics, a criterion for the controllability of the system under study was obtained. When developing the software, the library of interval mathematics was used. The developed software that implements the introduced interval arithmetic operations can be used in the study of the dynamic properties of automatic control systems, energy, economic and other nonlinear systems.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131074272","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830512
B. Bremdal, I. Ilieva, S. Puranik
Digitization and automation in the building sector are constantly increasing. Developments around the Internet of Things (IoT) also affect this industry. However, due to the lack of common standards, the development of building automation has been complicated, expensive, and slowly progressing. This paper presents an approach to increase the utilization of sensor data. The approach will help develop smart buildings where energy efficiency is increased and where better interaction with surrounding infrastructure is facilitated. The paper’s focus is on ontologies that make communication more intelligent, data labelling more efficient and utilization of collected and real-time data more expedient relative to the building's performance, area utilization and user experience. The idea is not to replace existing ontologies, but to create an overarching structure that connects essential concepts representing different perspectives of a building and interactions with surrounding infrastructure. We call this structure a hyper-ontology. The presented in the paper approach reflects ongoing work in the project DataCat.
{"title":"The Need for a Comprehensive Ontology for Smart Buildings","authors":"B. Bremdal, I. Ilieva, S. Puranik","doi":"10.1109/energycon53164.2022.9830512","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830512","url":null,"abstract":"Digitization and automation in the building sector are constantly increasing. Developments around the Internet of Things (IoT) also affect this industry. However, due to the lack of common standards, the development of building automation has been complicated, expensive, and slowly progressing. This paper presents an approach to increase the utilization of sensor data. The approach will help develop smart buildings where energy efficiency is increased and where better interaction with surrounding infrastructure is facilitated. The paper’s focus is on ontologies that make communication more intelligent, data labelling more efficient and utilization of collected and real-time data more expedient relative to the building's performance, area utilization and user experience. The idea is not to replace existing ontologies, but to create an overarching structure that connects essential concepts representing different perspectives of a building and interactions with surrounding infrastructure. We call this structure a hyper-ontology. The presented in the paper approach reflects ongoing work in the project DataCat.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129827012","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830387
A. Kintonova, I. Povkhan, A. Sabitov, Aizhan Tokkuliyeva, Natalya Demidchik
The paper describes the technology for creating an online course using the Learme online courses platform, ArticulateStoryline software. Organization of an online course, a brief description of the implementation of an online course based on elearning standards. The article reflects the results of the design and implementation of the online course “Web-programming” based on the e-learning standard.Development of an intelligent training course using data mining algorithms. Intelligent algorithms (data mining algorithms) underlie the development of intelligent technologies in scientific and electronic educational processes.
{"title":"Online Learning Technologies","authors":"A. Kintonova, I. Povkhan, A. Sabitov, Aizhan Tokkuliyeva, Natalya Demidchik","doi":"10.1109/energycon53164.2022.9830387","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830387","url":null,"abstract":"The paper describes the technology for creating an online course using the Learme online courses platform, ArticulateStoryline software. Organization of an online course, a brief description of the implementation of an online course based on elearning standards. The article reflects the results of the design and implementation of the online course “Web-programming” based on the e-learning standard.Development of an intelligent training course using data mining algorithms. Intelligent algorithms (data mining algorithms) underlie the development of intelligent technologies in scientific and electronic educational processes.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130338821","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830169
J. Teremranova, D. Zalostiba
In the summer of 2021, the European Commission presented a package of climate legislation (Fit for 55). It adjusts the European Union’s (EU) policies on climate, energy, land use, transport, and taxation to reduce net greenhouse gas emissions by at least 55 % by 2030 compared to 1990 levels. 2030 has become a milestone and an intermediate target for carbon neutrality in 2050. What does this mean for different energy sectors? How will energy stakeholders act to achieve the ambitious goals of climate neutrality in the coming decades? Are the goals set achievable for Latvia and Baltics, and how can building sector energy consumers help with their behavior changing and recent technology introduction? To answer these questions different building stock energy modelling scenarios have been elaborated using the Baltic Backbone model to find the best cost-effective way to meet all requirements and needs. The main results of modelling are presented and analyzed in this paper.
{"title":"Modelling of Building Sector Impact on Decarbonization of the Baltic Energy System","authors":"J. Teremranova, D. Zalostiba","doi":"10.1109/energycon53164.2022.9830169","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830169","url":null,"abstract":"In the summer of 2021, the European Commission presented a package of climate legislation (Fit for 55). It adjusts the European Union’s (EU) policies on climate, energy, land use, transport, and taxation to reduce net greenhouse gas emissions by at least 55 % by 2030 compared to 1990 levels. 2030 has become a milestone and an intermediate target for carbon neutrality in 2050. What does this mean for different energy sectors? How will energy stakeholders act to achieve the ambitious goals of climate neutrality in the coming decades? Are the goals set achievable for Latvia and Baltics, and how can building sector energy consumers help with their behavior changing and recent technology introduction? To answer these questions different building stock energy modelling scenarios have been elaborated using the Baltic Backbone model to find the best cost-effective way to meet all requirements and needs. The main results of modelling are presented and analyzed in this paper.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128769608","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830301
J. Hönen, J. Hurink, B. Zwart
Due to the increasing penetration of photovoltaic (PV) systems, electric vehicles (EV) and other smart devices on a household level, the role of consumers changes from pure consumption to production and storage of electricity. These prosumers will also directly participate in future electricity markets. To compensate for the small scale and the fluctuations in their demand and production, one promising approach for prosumers is to form small energy communities or microgrids, and participate in the electricity markets as one entity. A challenge for these microgrids is to find an optimal energy management strategy, mainly due to the uncertainty in electricity prices, in PV generation as Well as in the prosumer loads. To integrate this uncertainty into the planning, an adaptive robust optimization approach using linear decision rules is proposed in this paper. The linear decision rules allow for a delayed determination of some of the decisions and can therefore adapt to realizations of the uncertainty. Three different uncertainty scenarios are used to evaluate and compare the proposed approach in a case study and to get more structural insights into the efficiency of the approach.
{"title":"Robust Energy Management for a Microgrid","authors":"J. Hönen, J. Hurink, B. Zwart","doi":"10.1109/energycon53164.2022.9830301","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830301","url":null,"abstract":"Due to the increasing penetration of photovoltaic (PV) systems, electric vehicles (EV) and other smart devices on a household level, the role of consumers changes from pure consumption to production and storage of electricity. These prosumers will also directly participate in future electricity markets. To compensate for the small scale and the fluctuations in their demand and production, one promising approach for prosumers is to form small energy communities or microgrids, and participate in the electricity markets as one entity. A challenge for these microgrids is to find an optimal energy management strategy, mainly due to the uncertainty in electricity prices, in PV generation as Well as in the prosumer loads. To integrate this uncertainty into the planning, an adaptive robust optimization approach using linear decision rules is proposed in this paper. The linear decision rules allow for a delayed determination of some of the decisions and can therefore adapt to realizations of the uncertainty. Three different uncertainty scenarios are used to evaluate and compare the proposed approach in a case study and to get more structural insights into the efficiency of the approach.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121244786","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830522
C. Bailey, S. Chowdhury
With increasing electricity tariffs for African farmers, as well as pressure on global energy sectors to end their reliance on coal, a renewable system that has the potential to cut both costs and emissions would be a valuable resource. This paper details a waste-to-energy system intended for African animal farms. A focus on animal farms in Africa is important as many African power supply utilities are unreliable and rural areas are often at a loss for power. Africa, as a largely developing continent, is well suited to lead the way in a novel system of on-farm energy production. This paper shows that a system with 84% biomass and 16% PV supply provides an African farmer with the ability to save more than R6 million over the project’s lifespan of 20 years, while also recycling a waste resource and cutting methane emissions.
{"title":"Design of a cost-effective waste to energy system with storage for a typical African animal farm","authors":"C. Bailey, S. Chowdhury","doi":"10.1109/energycon53164.2022.9830522","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830522","url":null,"abstract":"With increasing electricity tariffs for African farmers, as well as pressure on global energy sectors to end their reliance on coal, a renewable system that has the potential to cut both costs and emissions would be a valuable resource. This paper details a waste-to-energy system intended for African animal farms. A focus on animal farms in Africa is important as many African power supply utilities are unreliable and rural areas are often at a loss for power. Africa, as a largely developing continent, is well suited to lead the way in a novel system of on-farm energy production. This paper shows that a system with 84% biomass and 16% PV supply provides an African farmer with the ability to save more than R6 million over the project’s lifespan of 20 years, while also recycling a waste resource and cutting methane emissions.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"12 8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126930078","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830231
M. L. Scala, M. Dicorato, G. Forte, C. Gadaleta, Chiara Giordano, M. Migliori, Davide Monno, E. Carlini
In the framework of energy transition, transmission network expansion planning process arises the need of effective and flexible tools to evaluate development options and their mutual influence, accounting for heterogenous though significant information. This paper aims to propose a new methodology developed by the Italian Transmission System Operator to identify and select the transmission network developments of higher importance for investment planning strategies. The presented approach involves the definition of alternatives by combination of network developments, by using a multi-criteria analysis involving technical and economic aspects. The method is tested on the Network Development Plan of Italian Transmission Network.
{"title":"Network development alternative analysis based on Analytic Hierarchy Process","authors":"M. L. Scala, M. Dicorato, G. Forte, C. Gadaleta, Chiara Giordano, M. Migliori, Davide Monno, E. Carlini","doi":"10.1109/energycon53164.2022.9830231","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830231","url":null,"abstract":"In the framework of energy transition, transmission network expansion planning process arises the need of effective and flexible tools to evaluate development options and their mutual influence, accounting for heterogenous though significant information. This paper aims to propose a new methodology developed by the Italian Transmission System Operator to identify and select the transmission network developments of higher importance for investment planning strategies. The presented approach involves the definition of alternatives by combination of network developments, by using a multi-criteria analysis involving technical and economic aspects. The method is tested on the Network Development Plan of Italian Transmission Network.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130157612","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 : 2022-05-09DOI: 10.1109/energycon53164.2022.9830259
Hamed Athari, D. Raisz
The endeavor to increase the integration of distributed power generation systems (DPGS) into the electric power system brings about new research areas, one of them is the energy internet concept. Similarly to the information internet, the energy internet would transfer packets as the units of energy. To avoid congestions in the packet dispatching process, routers and routing methods have been suggested in literature. Our proposal is to use multiple channels simultaneously. In this paper, the possibility of three-phase multi-frequency energy transfer is investigated. This task is performed by using grid-forming and grid-feeding converters. To have a balanced three-phase multi-frequency power system, the third harmonic component of the fundamental frequency is added to the power system as a zero-sequence signal. The control system consists of two parts. The grid-forming controller is responsible for the voltage and the respective frequency. The grid-feeding controller controls the powers and current of the grid-feeding converter. For doing so, both control systems should be able to decouple the frequencies from each other. As a result, the active and reactive powers can be transferred separately at different frequencies.
{"title":"Three-phase multi-frequency energy transfer system for realizing the energy internet","authors":"Hamed Athari, D. Raisz","doi":"10.1109/energycon53164.2022.9830259","DOIUrl":"https://doi.org/10.1109/energycon53164.2022.9830259","url":null,"abstract":"The endeavor to increase the integration of distributed power generation systems (DPGS) into the electric power system brings about new research areas, one of them is the energy internet concept. Similarly to the information internet, the energy internet would transfer packets as the units of energy. To avoid congestions in the packet dispatching process, routers and routing methods have been suggested in literature. Our proposal is to use multiple channels simultaneously. In this paper, the possibility of three-phase multi-frequency energy transfer is investigated. This task is performed by using grid-forming and grid-feeding converters. To have a balanced three-phase multi-frequency power system, the third harmonic component of the fundamental frequency is added to the power system as a zero-sequence signal. The control system consists of two parts. The grid-forming controller is responsible for the voltage and the respective frequency. The grid-feeding controller controls the powers and current of the grid-feeding converter. For doing so, both control systems should be able to decouple the frequencies from each other. As a result, the active and reactive powers can be transferred separately at different frequencies.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116039143","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 : 2022-05-09DOI: 10.1109/ENERGYCON53164.2022.9830165
Jianfei Shen, Yang Yang, W. Liu, Yi Shen
Speeding up the construction of ecological civilization and promoting the green transformation is an inevitable trend to form a new industrialization path with Chinese characteristics. This study first defines the boundaries of role of government in the transit to a green transformation of energy industry, and then analyses the mechanism of a series of economic policies formulated by the government on the transformation of enterprises in industrial structure upgrading, human capital appreciation as well as the introduction of foreign capital on the basis of technology upgrading. Finally, considering the regional heterogeneity and different government entities, a coordinated mechanism of law enforcement and supervision is proposed to provide supplements and detailed interpretation to the green transformation policy of the energy industry.
{"title":"The Green Transition of the Energy Industry: How to Define the Role of the Government","authors":"Jianfei Shen, Yang Yang, W. Liu, Yi Shen","doi":"10.1109/ENERGYCON53164.2022.9830165","DOIUrl":"https://doi.org/10.1109/ENERGYCON53164.2022.9830165","url":null,"abstract":"Speeding up the construction of ecological civilization and promoting the green transformation is an inevitable trend to form a new industrialization path with Chinese characteristics. This study first defines the boundaries of role of government in the transit to a green transformation of energy industry, and then analyses the mechanism of a series of economic policies formulated by the government on the transformation of enterprises in industrial structure upgrading, human capital appreciation as well as the introduction of foreign capital on the basis of technology upgrading. Finally, considering the regional heterogeneity and different government entities, a coordinated mechanism of law enforcement and supervision is proposed to provide supplements and detailed interpretation to the green transformation policy of the energy industry.","PeriodicalId":106388,"journal":{"name":"2022 IEEE 7th International Energy Conference (ENERGYCON)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115345506","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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