Pub Date : 2021-10-09DOI: 10.1109/REPE52765.2021.9617027
Xuejiaoluo
The flue gas flow field at the inlet of the bag filter of a coal-fired once-through boiler of a 1,000 MW ultra-supercritical variable pressure operation is uneven. The high temperature of the local flue gas will trigger the start of the water spray desuperheater system, which will easily lead to water vapour condensation and block the bag. The flow field of the flue at the inlet of the dust collector was tested, and on this basis, a numerical simulation was carried out, and finally, a baffle installation plan was designed. The flow field test results after the implementation of the baffle modification show that the uniformity of the inlet flue gas temperature and flue gas velocity distribution of the bag filter has been significantly improved.
{"title":"Numerical Simulation and Optimization of Flue Gas Flow Field at the Inlet of Bag Filter in a 1000 MW Power Station Boiler","authors":"Xuejiaoluo","doi":"10.1109/REPE52765.2021.9617027","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617027","url":null,"abstract":"The flue gas flow field at the inlet of the bag filter of a coal-fired once-through boiler of a 1,000 MW ultra-supercritical variable pressure operation is uneven. The high temperature of the local flue gas will trigger the start of the water spray desuperheater system, which will easily lead to water vapour condensation and block the bag. The flow field of the flue at the inlet of the dust collector was tested, and on this basis, a numerical simulation was carried out, and finally, a baffle installation plan was designed. The flow field test results after the implementation of the baffle modification show that the uniformity of the inlet flue gas temperature and flue gas velocity distribution of the bag filter has been significantly improved.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133308721","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}
When GIS during manufacturing, transportation, installation, and operation, metal particles will inevitably be generated due to mechanical friction. The existence of metal particles poses a huge threat to the insulation performance of GIS. The previous research on free metal particles in GIS mainly focused on the force analysis of the two-dimensional radial plane particle movement, ignoring the influence of the spacer on the axial movement of the particles. In this paper, by establishing a three-dimensional simulation model with spacers, the influence of spacers on particle axial electric field distribution is studied. Based on the analysis of the force of two-dimensional radial plane particles, the influence of axial electric field on particle movement is further studied. The results show that the direction of the electric field on the concave side of the spacer is directed from the spacer to one end of the pipeline, and the particles are subjected to the axial electric field force directed to the spacer. The particles are finally mainly concentrated near the spacer. The actual GIS experiment platform was taken to verify the simulation calculation results.
{"title":"Influence of Spacer on the Movement Law of Free Metal Particles in GIS","authors":"Jingtan Ma, Ke Zhao, Hongtao Li, Yujie Li, Yongfei Liu, Hanyan Xiao","doi":"10.1109/REPE52765.2021.9616981","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9616981","url":null,"abstract":"When GIS during manufacturing, transportation, installation, and operation, metal particles will inevitably be generated due to mechanical friction. The existence of metal particles poses a huge threat to the insulation performance of GIS. The previous research on free metal particles in GIS mainly focused on the force analysis of the two-dimensional radial plane particle movement, ignoring the influence of the spacer on the axial movement of the particles. In this paper, by establishing a three-dimensional simulation model with spacers, the influence of spacers on particle axial electric field distribution is studied. Based on the analysis of the force of two-dimensional radial plane particles, the influence of axial electric field on particle movement is further studied. The results show that the direction of the electric field on the concave side of the spacer is directed from the spacer to one end of the pipeline, and the particles are subjected to the axial electric field force directed to the spacer. The particles are finally mainly concentrated near the spacer. The actual GIS experiment platform was taken to verify the simulation calculation results.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133364558","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 : 2021-10-09DOI: 10.1109/REPE52765.2021.9616976
Zhang Xinjie, Guo Lingxu, Wang Jian, Li Xu, Zhang Yuze, Liu Shengnan
In the centralized supervision mode of the power grid, there are a large amount of alarm information and equipment maintenance, test and defect records. Its efficient storage and accurate retrieval play an important guiding role in the operation evaluation and supervision management of power grid equipment. This paper takes the power grid equipment maintenance, defects, alarms and oil chromatography, etc. as the research object, and proposes a top-down and bottom-up method to build a knowledge graph of power grid supervision business, which assists supervision management personnel to grasp the status of equipment in a timely manner and improve the power grid's emergency handling capabilities. Firstly, the schema layer is defined, including knowledge entities and relations between entities from top-down; then, the data layer from bottom-up is constructed through the rule-based template extraction and intelligent model-based approach; besides, the trinomial tree model is used to achieve multi-source data fusion, with a matching rate of 95.33% and an error rate of 2.3%; finally, the Neo4j graph database is applied to store and visualize the power grid supervision business knowledge graph. Also, the application of the knowledge graph is analyzed, including intelligent information retrieval and equipment condition evaluation and prediction. Through the case study of the oil chromatography data evaluation, the effectiveness of the above-mentioned knowledge graph is verified.
{"title":"A Construction Method for the Knowledge Graph of Power Grid Supervision Business","authors":"Zhang Xinjie, Guo Lingxu, Wang Jian, Li Xu, Zhang Yuze, Liu Shengnan","doi":"10.1109/REPE52765.2021.9616976","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9616976","url":null,"abstract":"In the centralized supervision mode of the power grid, there are a large amount of alarm information and equipment maintenance, test and defect records. Its efficient storage and accurate retrieval play an important guiding role in the operation evaluation and supervision management of power grid equipment. This paper takes the power grid equipment maintenance, defects, alarms and oil chromatography, etc. as the research object, and proposes a top-down and bottom-up method to build a knowledge graph of power grid supervision business, which assists supervision management personnel to grasp the status of equipment in a timely manner and improve the power grid's emergency handling capabilities. Firstly, the schema layer is defined, including knowledge entities and relations between entities from top-down; then, the data layer from bottom-up is constructed through the rule-based template extraction and intelligent model-based approach; besides, the trinomial tree model is used to achieve multi-source data fusion, with a matching rate of 95.33% and an error rate of 2.3%; finally, the Neo4j graph database is applied to store and visualize the power grid supervision business knowledge graph. Also, the application of the knowledge graph is analyzed, including intelligent information retrieval and equipment condition evaluation and prediction. Through the case study of the oil chromatography data evaluation, the effectiveness of the above-mentioned knowledge graph is verified.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131799432","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 : 2021-10-09DOI: 10.1109/REPE52765.2021.9617109
Saeedreza Jadidi, H. Badihi, Youmin Zhang
Smart microgrids are the basic components of the next-generation power grid known as smart grid. To achieve a more cost-effective functionality and enhance the reliability of smart microgrids, innovative techniques for cyber-attack detection and cyber-resilient control need to be addressed. For this purpose, this paper considers various distributed generation resources, including wind, solar and battery, as a hybrid renewable microgrid. A novel model-based cyber-attack detection and diagnosis scheme based on fuzzy modeling and identification approach is presented for the PV system at microgrid level. Also, an integrated cyber-resilient controller for the DC/DC pulse-width modulation (PWM) converter is proposed to mitigate the impacts of cyber-attacks. Finally, simulations are performed in MATLAB/Simulink environment to demonstrate the effectiveness of the proposed approaches.
{"title":"Active Cyber-Resilient Control for a PV System at Microgrid Level","authors":"Saeedreza Jadidi, H. Badihi, Youmin Zhang","doi":"10.1109/REPE52765.2021.9617109","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617109","url":null,"abstract":"Smart microgrids are the basic components of the next-generation power grid known as smart grid. To achieve a more cost-effective functionality and enhance the reliability of smart microgrids, innovative techniques for cyber-attack detection and cyber-resilient control need to be addressed. For this purpose, this paper considers various distributed generation resources, including wind, solar and battery, as a hybrid renewable microgrid. A novel model-based cyber-attack detection and diagnosis scheme based on fuzzy modeling and identification approach is presented for the PV system at microgrid level. Also, an integrated cyber-resilient controller for the DC/DC pulse-width modulation (PWM) converter is proposed to mitigate the impacts of cyber-attacks. Finally, simulations are performed in MATLAB/Simulink environment to demonstrate the effectiveness of the proposed approaches.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133069380","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 : 2021-10-09DOI: 10.1109/REPE52765.2021.9617082
Hang Li, Kai Yuan, Yi Song, Chongbo Sun, Kai Hou
Due to the close interaction between different types of energy system, the accident in one system may spread to others, which will affect the operation of RIES. As a result, The event tree analysis (ETA) is adopted to describe how the initial accident propagates among systems step by step. Then, A probabilistic energy flow calculation method considering the uncertainties including source-load fluctuation and component unavailability rate can be developed. A test system with 119 nodes is investigated to verify the effectiveness of the proposed method.
{"title":"Probalistic Energy Flow Calculation Method based on Event Tree Analysis","authors":"Hang Li, Kai Yuan, Yi Song, Chongbo Sun, Kai Hou","doi":"10.1109/REPE52765.2021.9617082","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617082","url":null,"abstract":"Due to the close interaction between different types of energy system, the accident in one system may spread to others, which will affect the operation of RIES. As a result, The event tree analysis (ETA) is adopted to describe how the initial accident propagates among systems step by step. Then, A probabilistic energy flow calculation method considering the uncertainties including source-load fluctuation and component unavailability rate can be developed. A test system with 119 nodes is investigated to verify the effectiveness of the proposed method.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128582989","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 : 2021-10-09DOI: 10.1109/REPE52765.2021.9617093
Yuhan Liu, Changzheng Gao, Lei Zhu, Y. Guo, Mingrui Zhao
China has announced the dual carbon targets in 2020, to achieve carbon peak before 2030 and neutralization by 2060. Many studies have forecasted the structures of China's energy as well as pathways and measures. Considering the characteristics of electric power system and the electrification development, this study proposed an assessment strategy to analyze the applicability of pathways to electric carbon peak in a region. Taking a certain region for an example, this paper comes up with two scenarios, high imported power and high nuclear capacity, by using the optimization model. Then, it compares these two pathways through evaluating the economic efficiency, reliability and security of power system, and carbon targets. Though lower cost per kWh of high nuclear scenario, taking into account the power system reliability and total carbon emission level, a high receiving ratio of power is a better choice for this certain region.
{"title":"Study of Regional Pathway to Carbon Peak in Electric Power Section","authors":"Yuhan Liu, Changzheng Gao, Lei Zhu, Y. Guo, Mingrui Zhao","doi":"10.1109/REPE52765.2021.9617093","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617093","url":null,"abstract":"China has announced the dual carbon targets in 2020, to achieve carbon peak before 2030 and neutralization by 2060. Many studies have forecasted the structures of China's energy as well as pathways and measures. Considering the characteristics of electric power system and the electrification development, this study proposed an assessment strategy to analyze the applicability of pathways to electric carbon peak in a region. Taking a certain region for an example, this paper comes up with two scenarios, high imported power and high nuclear capacity, by using the optimization model. Then, it compares these two pathways through evaluating the economic efficiency, reliability and security of power system, and carbon targets. Though lower cost per kWh of high nuclear scenario, taking into account the power system reliability and total carbon emission level, a high receiving ratio of power is a better choice for this certain region.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129158451","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 : 2021-10-09DOI: 10.1109/REPE52765.2021.9617025
Zhiping Cheng, Dongqiang Jia, Zhongwen Li, H. Zhang
Doubly-Fed Wind Power Generator (DFWPG) has an important application in the frequency response of wind power system. However, it is difficult to provide effective support for wind power system frequency regulation only by using DFWPG. To solve the problem, the energy storage system and the DFWPG are combined to involve in the frequency regulation of wind power system in this paper. The DFWPG is controlled by the virtual inertia frequency regulation and the pitch control. The output power of the energy storage system is adjusted by using the droop control. The simulation results show that the frequency stability can be effectively improved by introducing the wind-storage combined frequency regulation system.
{"title":"The Wind-Storage Joint Frequency for Wind Power System to Enhance System Stability","authors":"Zhiping Cheng, Dongqiang Jia, Zhongwen Li, H. Zhang","doi":"10.1109/REPE52765.2021.9617025","DOIUrl":"https://doi.org/10.1109/REPE52765.2021.9617025","url":null,"abstract":"Doubly-Fed Wind Power Generator (DFWPG) has an important application in the frequency response of wind power system. However, it is difficult to provide effective support for wind power system frequency regulation only by using DFWPG. To solve the problem, the energy storage system and the DFWPG are combined to involve in the frequency regulation of wind power system in this paper. The DFWPG is controlled by the virtual inertia frequency regulation and the pitch control. The output power of the energy storage system is adjusted by using the droop control. The simulation results show that the frequency stability can be effectively improved by introducing the wind-storage combined frequency regulation system.","PeriodicalId":136285,"journal":{"name":"2021 IEEE 4th International Conference on Renewable Energy and Power Engineering (REPE)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2021-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121875778","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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