2020 IEEE Sustainable Power and Energy Conference (iSPEC)最新文献_第3页

Solid Nitrogen Cryogenic Thermal Storage in the Terminations for Resilient Helium Gas Cooled HTS Cables Utilized in DC Power Distribution Network 直流配电网用弹性氦冷高温超导电缆终端固氮低温蓄热

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351004

Zhenyu Zhang, Nuo Cheng, Xiang Luo, Yuan Gao, C. H. Kim, S. Pamidi

{"title":"Solid Nitrogen Cryogenic Thermal Storage in the Terminations for Resilient Helium Gas Cooled HTS Cables Utilized in DC Power Distribution Network","authors":"Zhenyu Zhang, Nuo Cheng, Xiang Luo, Yuan Gao, C. H. Kim, S. Pamidi","doi":"10.1109/iSPEC50848.2020.9351004","DOIUrl":"https://doi.org/10.1109/iSPEC50848.2020.9351004","url":null,"abstract":"The low heat capacity of helium gas limits overall cooling capacity of helium gas cooled high temperature superconducting power cable and makes them susceptible to large temperature rises during unexpected events such as electrical faults or cryogenic system failures. Solid nitrogen has been explored as an additional cooling agent in the HTS cable termination. Additional cryogenic thermal storage in the form of solid nitrogen in the superconducting cable terminations can mitigate the risk by keeping the system in superconducting state until the appropriate contingency is activated. An external tank filled with activated carbon is used as an adsorption buffer tank for gaseous nitrogen to minimize the operational pressure. The use of activated carbon minimizes the volume of the buffer tank and prevents pressure rise due to the phase change from solid to gas. In addition, when the HTS cable system is back to normal operational condition, the activated carbon can provide the system back with the required nitrogen to establish cryogenic thermal storage in the form of solid nitrogen as a reversible and self-contained system. Comprehensive experiments were performed to explore the feasibility of using the activated carbon and its performance. It was found that the proposed system performs as a cryogenic thermal buffer to enable the superconducting cable system to tolerate unexpected heat surge and recover in an autonomous fashion while keeping the pressure below the desired value. In addition to integrate the concept into real applications, the mass of solid nitrogen has been quantified based on the required protection time and possible emergency heat load.","PeriodicalId":403879,"journal":{"name":"2020 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127683293","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}

引用次数: 0

Voltage stability analysis method of distributed photovoltaic integration based on improved V-Q sensitivity 基于改进V-Q灵敏度的分布式光伏集成电压稳定性分析方法

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351063

W. Hao, Qian Zhang, D. Gan, Minquan Chen

引用次数: 3

Security Assessment of Interdependent Electricity-Gas Networks 相互依赖的电-气网络安全评估

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351118

Tong Wei, X. Chu, Yutian Liu

引用次数: 1

The Intelligent Energy System Based on Internet of Things Helps Rural Electrification 基于物联网的智能能源系统助力农村电气化

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351116

Weidong Liu, Min Li, Guan Zhao, Hao Meng

{"title":"The Intelligent Energy System Based on Internet of Things Helps Rural Electrification","authors":"Weidong Liu, Min Li, Guan Zhao, Hao Meng","doi":"10.1109/iSPEC50848.2020.9351116","DOIUrl":"https://doi.org/10.1109/iSPEC50848.2020.9351116","url":null,"abstract":"It proposes a intelligent energy system based on Internet of things to help rural electrification. Because the rural electrification plays an important role in promoting the transformation of energy demand to electricity and increasing the proportion of electric energy in terminal energy consumption, and the high attention paid to rural electrification in today's society. Firstly, it builds the intelligent energy control system based on the Internet of Things. Its functions and technical characteristics are analyzed from the perspective of the framework of the system such as the perception layer, network layer, platform layer and application layer. Then, on this basis, it builds a “365 power-keeper” intelligent energy service platform to develop more functions such as IOT management, integrated monitoring, energy efficiency analysis, value-added services and so on. Finally, it demonstrates the application effect of intelligent energy service platform through the case of using intelligent energy in electrified greenhouse in shouguang, Shandong province. The results show that this intelligent energy system can effectively improve the level of intelligent energy use in rural electrification, provide intelligent sharing services, and meet the diversified demands of customers.","PeriodicalId":403879,"journal":{"name":"2020 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126279482","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}

引用次数: 0

Fault Current Calculation of MMC-HVDC With Varying Capacitance Equivalents 变电容当量MMC-HVDC故障电流计算

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351087

Guomin Luo, Xiaoming Zhang, Yanmei Liu, Dejin Li, Yuwen He, Lujun Yang

引用次数: 1

Optimization of Heterogeneous Resources Combination using Virtual Power Plant based on Modern Portfolio Theory 基于现代投资组合理论的虚拟电厂异构资源组合优化

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351224

Qiuchen Yun, Liting Tian, Fang Zhang, Lin Cheng

{"title":"Optimization of Heterogeneous Resources Combination using Virtual Power Plant based on Modern Portfolio Theory","authors":"Qiuchen Yun, Liting Tian, Fang Zhang, Lin Cheng","doi":"10.1109/iSPEC50848.2020.9351224","DOIUrl":"https://doi.org/10.1109/iSPEC50848.2020.9351224","url":null,"abstract":"In recent years, with the development of smart grid technologies, wind turbines, photovoltaics and other renewable energy sources as well as demand-side loads have participated in grid dispatching, resulting in increased complexity of energy flows in the grid. Distributed energy resources (DERs) differ in many dimensions, such as technical attributes, operating modes, and business objectives, and its management authority also belongs to different entities, making it more difficult for grids to manage DERs. A management mode, virtual power plant (VPP), being enabled by information and communication technology, could effectively overcome the challenges with decentralized DERs and help realize the aggregation of DERs. In this paper, the interaction between customers and VPP is modeled, where VPP divides the owners of DERs into three categories according to the willingness and responsiveness of customers and balances budget costs and risks based on the modern portfolio theory. Simulation with the CIGRE 20kV distribution network benchmark demonstrates that VPP could greatly meet the power consumption demand of multiple participants during operation. This paper also provides a basis for the selection of DERs aggregated by VPP.11This paper is sponsored by the National Key Research and Development Program (No.2017YFB0903300) and National Natural Science Foundation of China (No.51807107) 22This paper is sponsored by the Young Talents Support Project of the Chinese Society for Electrical Engineering (CSEE) titled “Research on key technologies for optimal operation and control of transportation energy systems”","PeriodicalId":403879,"journal":{"name":"2020 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115757273","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}

引用次数: 2

Study on Stray Current and Potential Distribution of Mtero under Complex Geological Conditions 复杂地质条件下地铁杂散电流与电位分布研究

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9350992

Han Zhang, Sheng Lin

引用次数: 1

Modeling of Spatial Distribution Characteristics of High Proportion Renewable Energy Based on Complex Principal Component Analysis 基于复主成分分析的高比例可再生能源空间分布特征建模

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351293

Jinying Liu, Xinzhi Xu, Fang Zhang, Yi Gao, Wenzhong Gao

{"title":"Modeling of Spatial Distribution Characteristics of High Proportion Renewable Energy Based on Complex Principal Component Analysis","authors":"Jinying Liu, Xinzhi Xu, Fang Zhang, Yi Gao, Wenzhong Gao","doi":"10.1109/iSPEC50848.2020.9351293","DOIUrl":"https://doi.org/10.1109/iSPEC50848.2020.9351293","url":null,"abstract":"The optimal allocation of global energy resources is a cardinal direction of the energy system, and the forecasting of renewable energy generation power prediction is the basis of energy interconnection. In power forecasting, it is necessary to integrate multiple information to improve the accuracy. Thus, bringing data that has no impact on the outcome and leads to computationally intensive data. Conventional principal component analysis (PCA) can downscale data with no temporal order. However, the data of meteorological parameters are with high temporal and spatial resolution. Therefore, it needs to be extended to complex principal component analysis (CPCA). Simultaneously, the unknown historical output of the regional power grid poses difficulties in predicting the generation power. This paper extracts the spatio-temporal features of renewable energy from typical local grids in the world based on CPCA. Through the interconnection relationship between different regions, this paper establishes a renewable energy generation prediction model. The validity and accuracy of the model are verified in MATLAB with domestic and foreign regional power grids as examples.","PeriodicalId":403879,"journal":{"name":"2020 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"145 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133950120","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}

引用次数: 0

Robust Planning Method for Integrated Energy Systems with the Consideration of multiple energy uncertainties 考虑多重能量不确定性的综合能源系统鲁棒规划方法

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9351071

Chao Huang, Quan Ding, Guoming Qian, Xuefeng Chen, Xiaoyu Chen

引用次数: 2

A Method of Assessing Photovoltaic Hosting Capacity Considering reverse power protection based on power direction in a Spot Network 基于功率方向考虑反向保护的点网光伏承载容量评估方法

2020 IEEE Sustainable Power and Energy Conference (iSPEC) Pub Date : 2020-11-23 DOI: 10.1109/iSPEC50848.2020.9350951

Z. Zhihua, Zhao Yi-long, Wang Kun

{"title":"A Method of Assessing Photovoltaic Hosting Capacity Considering reverse power protection based on power direction in a Spot Network","authors":"Z. Zhihua, Zhao Yi-long, Wang Kun","doi":"10.1109/iSPEC50848.2020.9350951","DOIUrl":"https://doi.org/10.1109/iSPEC50848.2020.9350951","url":null,"abstract":"Compared to traditional method, the improved reverse power protection method that based on current variation and positive sequence power direction could enhance the photovoltaic (PV) hosting capacity greatly in a spot network. However, how to calculate the value of PV hosting capacity with the improved reverse power protection has not been discussed. This paper presents a method about how to assess the PV hosting capacity in a spot network with the improved re-verse power protection. Considering the output current characteristics of a PV inverter under external fault, a composite sequence network under types of short circuit fault is analyzed. The relationship between the setting value of protection and the access current of PV is deduced. By studying the critical condition of protection failure, a method of assessing PV hosting capacity to avoid protection misoperation is proposed. The simulation model based on practical engineering by PSCAD is established. And simulation results verify the correctness of this assessment method. By modeling and simulation, the influence of load, fault tran-sition, and load imbalance on PV hosting capacity are analyzed.","PeriodicalId":403879,"journal":{"name":"2020 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-11-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131607291","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}

引用次数: 0