Pub Date : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114212
Zhijie Liu, Shouzhen Zhu, Zhenhai Zhang, P. Zhang
With the large-scale access of distributed generation and electric vehicles, the "source and load" of active distribution network presents uncontrollable volatility and uncertainty. The passive grid generation method has been unable to keep up with the influence that operation, maintenance and management of distribution network brought by the volatility and uncertainty of the "source and load". New grid generation methods are urgently needed to adapt to the rapid development of active distribution networks. In this paper, a grid generation strategy for active distribution networks considering distributed generation and electric vehicles is proposed. Firstly, the uncertainty is modeled, and the uncertainty probability model of distributed generation and electric vehicle is built; Then, with the goal of maximizing the consumption rate of distributed generation and minimizing the line loss, the bacterial foraging algorithm is used to improve the particle swarm search formula to achieve network reconstruction and optimization, and the mesh can be re- divided; Finally, the IEEE94 node system including distributed power generation and electric vehicle is used for simulation. The results show that the distributed energy consumption rate of the proposed algorithm is increased by 17 percentage points, and the daily line loss is reduced by 27.2 percentage points, which verifies the effectiveness of the proposed division method.
{"title":"Gridding Method of Active Distribution Network Considering Distributed Generation and Electric Vehicle","authors":"Zhijie Liu, Shouzhen Zhu, Zhenhai Zhang, P. Zhang","doi":"10.1109/AEEES56888.2023.10114212","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114212","url":null,"abstract":"With the large-scale access of distributed generation and electric vehicles, the \"source and load\" of active distribution network presents uncontrollable volatility and uncertainty. The passive grid generation method has been unable to keep up with the influence that operation, maintenance and management of distribution network brought by the volatility and uncertainty of the \"source and load\". New grid generation methods are urgently needed to adapt to the rapid development of active distribution networks. In this paper, a grid generation strategy for active distribution networks considering distributed generation and electric vehicles is proposed. Firstly, the uncertainty is modeled, and the uncertainty probability model of distributed generation and electric vehicle is built; Then, with the goal of maximizing the consumption rate of distributed generation and minimizing the line loss, the bacterial foraging algorithm is used to improve the particle swarm search formula to achieve network reconstruction and optimization, and the mesh can be re- divided; Finally, the IEEE94 node system including distributed power generation and electric vehicle is used for simulation. The results show that the distributed energy consumption rate of the proposed algorithm is increased by 17 percentage points, and the daily line loss is reduced by 27.2 percentage points, which verifies the effectiveness of the proposed division method.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132664050","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114302
Junyang Liu
The identification of industry electricity consumptions is of great importance for the forecast of electricity demands, which can support the decision of government’s economic polices and power electricity enterprises. This paper firstly analyze the electricity consumption characteristics of the textile industry, flue-cured tobacco industry, and cement gypsum industry. Secondly, electricity consumption characteristics of different users are classified from the perspectives of enterprise production and operation period, holiday, working day, production load, etc. Then the correlation factors of industry electricity consumption characteristics are extracted from the data. Finally, the cluster analysis of electricity consumption behavior characteristics are carried out. Experiment results show that the cluster analysis based on industry characteristics can be utilized for the identification of the abnormal electricity consumption behavior.
{"title":"Cluster Analysis of Electricity Consumption Characteristics and Electricity Consumption Behavior of Typical Industry Users","authors":"Junyang Liu","doi":"10.1109/AEEES56888.2023.10114302","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114302","url":null,"abstract":"The identification of industry electricity consumptions is of great importance for the forecast of electricity demands, which can support the decision of government’s economic polices and power electricity enterprises. This paper firstly analyze the electricity consumption characteristics of the textile industry, flue-cured tobacco industry, and cement gypsum industry. Secondly, electricity consumption characteristics of different users are classified from the perspectives of enterprise production and operation period, holiday, working day, production load, etc. Then the correlation factors of industry electricity consumption characteristics are extracted from the data. Finally, the cluster analysis of electricity consumption behavior characteristics are carried out. Experiment results show that the cluster analysis based on industry characteristics can be utilized for the identification of the abnormal electricity consumption behavior.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"256 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132980818","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114164
Peng Xia, Haitao Chen, Bo Yuan, Jinfang Zhang, Cong Wu, Yichun Gong
With the development and promotion of technologies such as electric hydrogen generation and electric heat generation, terminal energy such as electricity-heat hydrogen shows a significant coupling development trend. In order to scientifically plan the supply structure of primary energy under the carbon neutral vision, it is urgent to consider the coupling transformation path of power generation, electricity-heat, electricity-hydrogen and other types of energy. First of all, based on the optimization principle of traditional energy and power planning models, the idea of energy and power optimization path toward dual carbon goal considering electricity-heat-hydrogen-carbon coupling is proposed. Then, the primary and secondary processing and conversion link models of terminal kerosene gas are established, and the fossil energy conversion link models of terminal heat and hydrogen are established. On this basis, the goal is to optimize the economy. An energy and power optimization planning model considering electricity-heat-hydrogen-carbon coupling is established, and a method is proposed. Finally, taking the path toward carbon peaking carbon neutrality goals of China’s energy power as an example, simulation analysis is carried out to verify the effectiveness of the proposed method.
{"title":"Study on Optimization Method of Energy and Power Path toward Dual Carbon Goal Considering Electricity-Heat-Hydrogen-Carbon Coupling","authors":"Peng Xia, Haitao Chen, Bo Yuan, Jinfang Zhang, Cong Wu, Yichun Gong","doi":"10.1109/AEEES56888.2023.10114164","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114164","url":null,"abstract":"With the development and promotion of technologies such as electric hydrogen generation and electric heat generation, terminal energy such as electricity-heat hydrogen shows a significant coupling development trend. In order to scientifically plan the supply structure of primary energy under the carbon neutral vision, it is urgent to consider the coupling transformation path of power generation, electricity-heat, electricity-hydrogen and other types of energy. First of all, based on the optimization principle of traditional energy and power planning models, the idea of energy and power optimization path toward dual carbon goal considering electricity-heat-hydrogen-carbon coupling is proposed. Then, the primary and secondary processing and conversion link models of terminal kerosene gas are established, and the fossil energy conversion link models of terminal heat and hydrogen are established. On this basis, the goal is to optimize the economy. An energy and power optimization planning model considering electricity-heat-hydrogen-carbon coupling is established, and a method is proposed. Finally, taking the path toward carbon peaking carbon neutrality goals of China’s energy power as an example, simulation analysis is carried out to verify the effectiveness of the proposed method.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"57 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121558416","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114207
Wei Li, Zhizhong Li, Hualin He, Xixiang Wang, Lei Lei
In order to test the performance of flexible flat strip copper-clad steel grounding electrode, the copper-clad steel grounding electrode made by hot melt continuous casting and rolling process was used for testing and research. First, the electrical and mechanical characteristics of two different specifications(30mm×15mm and 30mm×10mm) of grounding electrodes shall be inspected, including surface quality inspection, bending test, copper layer and steel core bonding test, resistivity and relative conductivity inspection, and all parameters shall comply with the provisions of relevant standards; Secondly, the corrosion resistance of the grounding electrode is tested, and the maximum annual average corrosion rate of this copper-clad steel grounding electrode is 0.0068mm/a through electrochemical accelerated corrosion method, which proves that this grounding electrode has excellent corrosion resistance; Finally, the power frequency grounding resistance characteristics of flat strip copper-clad steel grounding grid are simulated and calculated. By comparing the grounding resistance values of galvanized steel, steel, cylindrical copper-clad steel and other different materials under the same size of grounding grid, it is proved that this grounding grid has a certain resistance reduction effect. The test results in this paper can guide the application of this kind of material in power system grounding grid.
{"title":"Performance Test and Research of Flexible Flat Strip Copper-clad Steel Grounding Electrode","authors":"Wei Li, Zhizhong Li, Hualin He, Xixiang Wang, Lei Lei","doi":"10.1109/AEEES56888.2023.10114207","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114207","url":null,"abstract":"In order to test the performance of flexible flat strip copper-clad steel grounding electrode, the copper-clad steel grounding electrode made by hot melt continuous casting and rolling process was used for testing and research. First, the electrical and mechanical characteristics of two different specifications(30mm×15mm and 30mm×10mm) of grounding electrodes shall be inspected, including surface quality inspection, bending test, copper layer and steel core bonding test, resistivity and relative conductivity inspection, and all parameters shall comply with the provisions of relevant standards; Secondly, the corrosion resistance of the grounding electrode is tested, and the maximum annual average corrosion rate of this copper-clad steel grounding electrode is 0.0068mm/a through electrochemical accelerated corrosion method, which proves that this grounding electrode has excellent corrosion resistance; Finally, the power frequency grounding resistance characteristics of flat strip copper-clad steel grounding grid are simulated and calculated. By comparing the grounding resistance values of galvanized steel, steel, cylindrical copper-clad steel and other different materials under the same size of grounding grid, it is proved that this grounding grid has a certain resistance reduction effect. The test results in this paper can guide the application of this kind of material in power system grounding grid.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115422090","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114076
G. Sun, Sixiang Chen, Baiquan Chen, Yijun Liu, Bangfa Chen, Hengzheng Li, Richao Deng, Anzhi Fu
In recent years, 10kV air-insulated switchgear is gradually replacing SF6 gas-insulated switchgear. In the long-term operation of the air insulated switchgear, high temperature will lead to the aging of the insulator and mechanism, resulting in serious consequences. Therefore, it is of great significance to study the temperature rise characteristics of 10kV air-insulated switchgear in different states for the promotion of air-insulated switchgear and the safe operation of power grid. In this paper, the electromagnetic and thermal coupling simulation model is established by using the multi-physical field finite element software COMSOL, and the temperature rise characteristics under normal conditions are analyzed. Then the influence of the contact resistance of circuit breaker on the temperature rise inside the switchgear is analyzed. It is found that the overall temperature rise of the A-phase conductor circuit is slightly higher than that of the other two phases. Under normal operation, the temperature rise of the lower busbar in the phase A is the highest. The increase in contact resistance caused by long-term operation will lead to an increase in temperature rise. If the contact resistance is greater than 337.5μΩ, the temperature rise of the vacuum circuit breaker contact is higher than that of the lower busbar in the phase A. The influence of the contact resistance on temperature rise is linear.
{"title":"Study on Electromagnetic-Thermal Simulation of 10kV Air Insulated Switchgear","authors":"G. Sun, Sixiang Chen, Baiquan Chen, Yijun Liu, Bangfa Chen, Hengzheng Li, Richao Deng, Anzhi Fu","doi":"10.1109/AEEES56888.2023.10114076","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114076","url":null,"abstract":"In recent years, 10kV air-insulated switchgear is gradually replacing SF6 gas-insulated switchgear. In the long-term operation of the air insulated switchgear, high temperature will lead to the aging of the insulator and mechanism, resulting in serious consequences. Therefore, it is of great significance to study the temperature rise characteristics of 10kV air-insulated switchgear in different states for the promotion of air-insulated switchgear and the safe operation of power grid. In this paper, the electromagnetic and thermal coupling simulation model is established by using the multi-physical field finite element software COMSOL, and the temperature rise characteristics under normal conditions are analyzed. Then the influence of the contact resistance of circuit breaker on the temperature rise inside the switchgear is analyzed. It is found that the overall temperature rise of the A-phase conductor circuit is slightly higher than that of the other two phases. Under normal operation, the temperature rise of the lower busbar in the phase A is the highest. The increase in contact resistance caused by long-term operation will lead to an increase in temperature rise. If the contact resistance is greater than 337.5μΩ, the temperature rise of the vacuum circuit breaker contact is higher than that of the lower busbar in the phase A. The influence of the contact resistance on temperature rise is linear.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116064634","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114348
Hanchen Ge, Zhongxi Ou, Zhicong Huang
Nowadays, the data-driven approaches to modeling power electronics (PE) systems are mostly based on sequential neural networks (NNs). These approaches may require too much data since the NNs can not generalize across a wide range of inputs. To address this issue, this paper proposes a new data-driven approach to modeling the transient behaviors of DC-DC converters, which is based on fully-connected NNs. The proposed method introduced prior knowledge about linear systems and thus significantly improved the generalization performance. In this method, circuit parameters are first mapped into linear system characteristics by fully-connected NNs, and then the outputs are calculated by the inputs and the system characteristics. Experiment results show that the entire circuit topology with configurable parameter settings and initial conditions can be successfully modeled. Parameter change events are also supported by this approach.
{"title":"A Data-driven Approach with Improved Generalization Performance to Modeling Transient Behaviors of DC-DC Converters","authors":"Hanchen Ge, Zhongxi Ou, Zhicong Huang","doi":"10.1109/AEEES56888.2023.10114348","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114348","url":null,"abstract":"Nowadays, the data-driven approaches to modeling power electronics (PE) systems are mostly based on sequential neural networks (NNs). These approaches may require too much data since the NNs can not generalize across a wide range of inputs. To address this issue, this paper proposes a new data-driven approach to modeling the transient behaviors of DC-DC converters, which is based on fully-connected NNs. The proposed method introduced prior knowledge about linear systems and thus significantly improved the generalization performance. In this method, circuit parameters are first mapped into linear system characteristics by fully-connected NNs, and then the outputs are calculated by the inputs and the system characteristics. Experiment results show that the entire circuit topology with configurable parameter settings and initial conditions can be successfully modeled. Parameter change events are also supported by this approach.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125302404","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114268
Yichen Luo, Xiao Xu, Pan Li, Junyong Liu, Weihao Hu
The propagation of outage rumors will cause changes in load demand and increase the risk of the power grid operation. Due to the lack of considering the correlation between outage rumor propagation and load demand changes in the existing references, this paper proposes an outage rumor propagation model using the susceptible infected removed (SIR) model. Based on the SIR model, the number of infected individuals and load demand changes after suffering rumors can be obtained. Also, the influence of rumor propagation on the power grid operation is investigated. This paper studies the influence of rumor propagation on load demand by setting high, medium, and low three infection rate and recovery rate scenarios in different individuals. In addition, the optimal results of the power system operation are found based on the reptile search algorithm method in this work. The results can provide important basic information for future operational optimization of the complex power grid.
{"title":"Operational Optimization of a Power Grid Considering Power Outage Rumors","authors":"Yichen Luo, Xiao Xu, Pan Li, Junyong Liu, Weihao Hu","doi":"10.1109/AEEES56888.2023.10114268","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114268","url":null,"abstract":"The propagation of outage rumors will cause changes in load demand and increase the risk of the power grid operation. Due to the lack of considering the correlation between outage rumor propagation and load demand changes in the existing references, this paper proposes an outage rumor propagation model using the susceptible infected removed (SIR) model. Based on the SIR model, the number of infected individuals and load demand changes after suffering rumors can be obtained. Also, the influence of rumor propagation on the power grid operation is investigated. This paper studies the influence of rumor propagation on load demand by setting high, medium, and low three infection rate and recovery rate scenarios in different individuals. In addition, the optimal results of the power system operation are found based on the reptile search algorithm method in this work. The results can provide important basic information for future operational optimization of the complex power grid.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124013674","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114141
Xipeng Yu, Zhao Wang
Probabilistic safety analysis (PSA) technology has become the mainstream analysis method in the world to support the daily risk management and safety decision-making in nuclear power plants. The technical specifications of a nuclear power plant in China require that the charging pump and the low-pressure safety injection pump available under the condition of cold shutdown need to be arranged in different series. In the process of switching the middle system technical specifications, management optimization was carried out, and the configuration requirements of charging pump and low-pressure safety injection pump in the original technical specifications were cancelled. In this paper, the risk-informed analysis technology is applied to analyze and determine whether the technical requirements related to the events could be optimized. Ensure the safe and stable operation of nuclear power plant.
{"title":"Application of PSA Technology in Safe Operation of Nuclear Power Plant","authors":"Xipeng Yu, Zhao Wang","doi":"10.1109/AEEES56888.2023.10114141","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114141","url":null,"abstract":"Probabilistic safety analysis (PSA) technology has become the mainstream analysis method in the world to support the daily risk management and safety decision-making in nuclear power plants. The technical specifications of a nuclear power plant in China require that the charging pump and the low-pressure safety injection pump available under the condition of cold shutdown need to be arranged in different series. In the process of switching the middle system technical specifications, management optimization was carried out, and the configuration requirements of charging pump and low-pressure safety injection pump in the original technical specifications were cancelled. In this paper, the risk-informed analysis technology is applied to analyze and determine whether the technical requirements related to the events could be optimized. Ensure the safe and stable operation of nuclear power plant.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124037028","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114234
F. Peng, Houlei Gao, Weiying Miao, Xinchi Feng, Bin Xu, Yitong Wu
With the characteristics of low loss, low harmonic content and large transmission capacity, voltage source converter based high voltage direct current transmission (VSC-HVDC) has become the focus of the development for large-capacity and long-distance power transmission system connected with offshore wind farms. However, since the power supplies on both sides are controlled, the fault characteristics are changed, and the performance of the traditional distance protection is influenced. Based on the control strategy, the amplitude and phase angle of the equivalent positive and negative sequence impedances at the two sides of the transmission line are analyzed, and the current phasor expressions of the wind farm side and the VSC-HVDC side of the faulted line are derived. Then the adaptability of distance protection using power frequency component (DPPFC) of transmission line for VSC-HVDC-connected offshore wind farm is analyzed under different fault conditions. The results show that the amplitude and phase angle of the equivalent positive and negative sequence impedances of the wind farm and the VSC-HVDC system are affected by the control strategy of the converter and the fault conditions. The DPPFC is not suitable for VSC-HVDC-connected offshore wind farm system. The ability to avoid the effect of fault resistance of the DPPFC at the wind farm side gets worse. The simulation conducted by EMTP-RV verifies the effectiveness of the analysis.
{"title":"Analysis of Fault Characteristics and Distance Protection Adaptability for VSC-HVDC-Connected Offshore Wind Farms","authors":"F. Peng, Houlei Gao, Weiying Miao, Xinchi Feng, Bin Xu, Yitong Wu","doi":"10.1109/AEEES56888.2023.10114234","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114234","url":null,"abstract":"With the characteristics of low loss, low harmonic content and large transmission capacity, voltage source converter based high voltage direct current transmission (VSC-HVDC) has become the focus of the development for large-capacity and long-distance power transmission system connected with offshore wind farms. However, since the power supplies on both sides are controlled, the fault characteristics are changed, and the performance of the traditional distance protection is influenced. Based on the control strategy, the amplitude and phase angle of the equivalent positive and negative sequence impedances at the two sides of the transmission line are analyzed, and the current phasor expressions of the wind farm side and the VSC-HVDC side of the faulted line are derived. Then the adaptability of distance protection using power frequency component (DPPFC) of transmission line for VSC-HVDC-connected offshore wind farm is analyzed under different fault conditions. The results show that the amplitude and phase angle of the equivalent positive and negative sequence impedances of the wind farm and the VSC-HVDC system are affected by the control strategy of the converter and the fault conditions. The DPPFC is not suitable for VSC-HVDC-connected offshore wind farm system. The ability to avoid the effect of fault resistance of the DPPFC at the wind farm side gets worse. The simulation conducted by EMTP-RV verifies the effectiveness of the analysis.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"103 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122492034","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 : 2023-03-23DOI: 10.1109/AEEES56888.2023.10114345
Ke Zhao, Hongtao Li, Jingtan Ma, Tianxin Zhuang, Yujie Li, Hanyan Xiao, Ze Yin
To reliably identify the operating state of Gas Insulated Switchgear (GIS), a mechanical fault diagnosis method for GIS, based on a convolutional neural network and enhanced gramian angular field is proposed. Firstly, the vibration sensor is used to obtain the original time domain signals of GIS equipment in different states. Afterwards, the gramian angular field is employed to encode the one-dimensional time domain signals into two-dimensional maps. Finally, the convolution neural network is utilized to identify the different mechanical defects of GIS. Moreover, the typical mechanical defects of three kinds of GIS equipment are simulated. The calculation results show that the proposed method could effectively represent the different operating states of GIS, and the identification accuracy reached 98%, which provides a reliable basis for the state evaluation of GIS.
{"title":"Mechanical Fault Diagnosis Method for GIS Based on Convolution Neural Network and Enhanced Gramian Angular Field","authors":"Ke Zhao, Hongtao Li, Jingtan Ma, Tianxin Zhuang, Yujie Li, Hanyan Xiao, Ze Yin","doi":"10.1109/AEEES56888.2023.10114345","DOIUrl":"https://doi.org/10.1109/AEEES56888.2023.10114345","url":null,"abstract":"To reliably identify the operating state of Gas Insulated Switchgear (GIS), a mechanical fault diagnosis method for GIS, based on a convolutional neural network and enhanced gramian angular field is proposed. Firstly, the vibration sensor is used to obtain the original time domain signals of GIS equipment in different states. Afterwards, the gramian angular field is employed to encode the one-dimensional time domain signals into two-dimensional maps. Finally, the convolution neural network is utilized to identify the different mechanical defects of GIS. Moreover, the typical mechanical defects of three kinds of GIS equipment are simulated. The calculation results show that the proposed method could effectively represent the different operating states of GIS, and the identification accuracy reached 98%, which provides a reliable basis for the state evaluation of GIS.","PeriodicalId":272114,"journal":{"name":"2023 5th Asia Energy and Electrical Engineering Symposium (AEEES)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-03-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128149366","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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