Song Gao, Jianjun Liu, Gang Qiu, Shengzhen Yang, Xiujuan Xu
{"title":"Optimal maintenance method for insulators based on online monitoring","authors":"Song Gao, Jianjun Liu, Gang Qiu, Shengzhen Yang, Xiujuan Xu","doi":"10.1109/iSPEC53008.2021.9736091","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9736091","url":null,"abstract":"The current insulator maintenance has defects such as insufficient resources and extensive management. With the development of lora module and millimeter wave inspection chip, the online inspection of insulators has become possible. This paper proposing to optimize the maintenance of transmission line insulator based on online monitoring. And provide generator dispatching plan during power outage to replace insulator. An optimization model with reliability and economy as the object is established, and use the simulated annealing algorithm to optimize the model. Finally, the model and optimization algorithm is applied to optimize the IEEE 14 system insulator maintenance plan, which verifies the practicability of the method.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114321597","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}
{"title":"Safety-critical Eco-driving Strategy for Electric Vehicle at Signalized Intersection Using Control Barrier Function","authors":"Haonan Ding, Haoxuan Dong, Weichao Zhuang, Haoji Liu, Guo-dong Yin, Zhihan Li","doi":"10.1109/iSPEC53008.2021.9736005","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9736005","url":null,"abstract":"This paper proposes a safety-critical eco-driving strategy to reduce the energy consumption of electric vehicles (EV) which is driving through a signalized intersection. First, the energy-optimal control problem is formulated with the goal of minimum battery power consumption with some safety related constraints. Second, the original optimal control problem is converted to a quadratic programming by using Control Barrier Functions (CBF), which can ensure the safety of the ego vehicle from traffic flow. The energy optimal speed profiles are derived to reduce travel delay while ensuring vehicle driving safety. Finally, three driving scenarios are simulated to evaluate the effectiveness of proposed strategy. The results show that the proposed strategy can reduce the EV’s energy consumption dramatically compared to a traditional driving strategy, while the vehicle safety requirement is strictly met.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114783754","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}
{"title":"Joint optimal scheduling for EV-UAV system serving post-disaster rescue","authors":"Wenchao Bai, Mingfei Ban, Qiang Liu, Qichao Chen, Zhenjie Li, Yiqi Liu","doi":"10.1109/iSPEC53008.2021.9735807","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735807","url":null,"abstract":"The UAV system is an emerging hi-tech force for emergency response and disaster relief. Electric vehicles (EV) plus unmanned aerial vehicles (UAVs) is a novel post-disaster emergency rescue pattern. In an EV-UAV system, the EV acts as a mobile depot to support its mounted UAVs while the UAVs depart from the EV to complete various rescue tasks. And distributed energy sources, e. g., a microgrid and a battery-swapping station, can provide charging services for the EV to enlarge its endurance. A two-echelon framework is presented based on mixed-integer linear programming (MILP) to perform joint optimal scheduling considering constraints such as time windows of demand points, energy endurance and load capacities of UAVs. Case studies demonstrate the effectiveness of the model and illustrate the potentials of the proposed system.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115124118","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}
{"title":"Vulnerability Assessment For Power-Transportation Coupled Network Based On Topological Methods","authors":"Liang Hong, Difei Tang, Chen Wei","doi":"10.1109/iSPEC53008.2021.9735585","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735585","url":null,"abstract":"With the rapid development of electric vehicles (EVs), the power system and the transportation system have become closely related. The interdependence between the power and transportation systems is getting increasing attention. In this paper, a two-layer network that couples the power and transportation systems is built based on the complex network (CN) theory for the vulnerability assessment of the coupled network. Node electrical betweenness is used to identify the critical components in the power network. The intentional attack strategy based on node electrical betweenness simulates the real network failures. The relative size of the largest remaining connected component and the efficiency of the network are used to evaluate the performance of the network before and after the attacks. An IEEE-39 bus power network coupled with an IEEE-14 node transportation network is studied to verify the feasibility of the proposed method. The result shows that the coupled network is vulnerable to intentional attacks.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114384262","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}
{"title":"Optimization Method of Spinning Reserve Capacity for Day-ahead Generation Scheduling Under the Constraints of Carbon Emission Limits","authors":"A. Alrashidi Abdullah Obid, Haoyong Chen","doi":"10.1109/iSPEC53008.2021.9735873","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735873","url":null,"abstract":"In the context of power system with high proportion of wind power, the adjustable capacity of AGC units should be reserved to ensure real-time power balance when making day-ahead generation scheduling. In the framework with multi-power regulate segment, an analytical model of quantitative causality is presented for the problem how to reasonably arrange the upward reserve capacity and downward reserve capacity of AGC units in the day-ahead stage under the constraints of carbon emission limits. That regulating capacity not only ensures that the AGC unit can suppress the fluctuation of wind power and load, but also makes power system have a partial regulating margin, and robust optimization method is used for achieving the absolute security of these two aspects. Moreover, a new modeling method considering the fluctuation of wind power and load with upward reserve capacity and downward reserve capacity of AGC units is proposed, which reduces the number of constraints with random parameters and the complexity of the model. The simulation is carried out in modified IEEE 30-bus system with high proportion of wind power, which verifies the validity of the model.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114709159","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}
{"title":"Transformer Component Recognition in Pictures Taken by Submersible Robots","authors":"Yingjie Yan, Yadong Liu, Zhicheng Xie, J. Deng","doi":"10.1109/iSPEC53008.2021.9735767","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735767","url":null,"abstract":"Inspection of transformers is very important to ensure power supply reliability. Compared with manual methods, using submersible robots to automatically take and analyze pictures is much more time-efficient and lower-cost. To solve the problems of varying illumination and view point in transformer component recognition task, a framework called Transformer Network with Image Enhancement (TRIE) is proposed. This method first enhances the picture based on local contrast information, and then recognizes the inside components with the help of Transformer Network which considers extra context information in the unique encoder-decoder structure and attention mechanism. Experiments show that this framework performs much better than other three deep-learning models on field data of transformer inside pictures, largely improving the development of automatic power equipment inspection.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114894038","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}
Wang Wenhua, Huang Ying, Zhang Yang, Gu Tao, Yan-Hung Wei, Zhou Qinglai, Pan Bo
{"title":"Decentralised Optimal Operation Strategy for AC/DC Distribution Networks Considering Electric Vehicles","authors":"Wang Wenhua, Huang Ying, Zhang Yang, Gu Tao, Yan-Hung Wei, Zhou Qinglai, Pan Bo","doi":"10.1109/iSPEC53008.2021.9735825","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735825","url":null,"abstract":"With the development of Direct Current (DC) transmission technology and power electronics technology, traditional Alternating Current (AC) distribution networks are being gradually transformed into AC/DC hybrid distribution network with a significant zoning structure. This paper proposes a distributed optimal operation strategy for AC/DC distribution networks by considering electric vehicles (EVs). First, Monte Carlo simulation is used to establish a mathematical model for EVs. Considering the differences between constituent districts and the controllability of EVs, appropriate charging start times of EVs are designated, and the objective function is to minimize the fluctuation of the total load curve. Subsequently, the chance-constrained method is applied to address the uncertainty of renewable energy and load. By implementing the coordinated dispatch of source, load, and storage, the optimal operation model of the AC/DC distribution network is established, based on the improved alternating direction multiplier method. The simulation results verify the effectiveness of the proposed distributed optimal operation strategy.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114917388","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}
{"title":"Short-term Load Forecasting By Multi-feature Iterative Learning Based on ISFS And XGBoost","authors":"Yajie Tang, Zhihao Li, Chouwei Ni, Diyang Gong, Wenjin Chen, Xuesong Zhang","doi":"10.1109/iSPEC53008.2021.9735434","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735434","url":null,"abstract":"With the continuous development of smart grid and demand response technology, the electrical load gradually takes on an elastic, flexible, uncertain and controllable quality. In order to fully excavate the potential information behind the power load in smart grid and make use of it, the study of load feature analysis and load forecasting appear to be particularly important. Considering massive related data, machine learning algorithm based on big data analysis is the current mainstream method of establishing a forecasting model. It deeply mines the mapping relation between features and load. Feature selections on model training will directly affect the accuracy of short-term load forecasting. For making the most of massive data to improve the effect of feature selection, this paper proposes a short-term load forecasting method by multi-feature iterative learning based on ISFS (Improved Spanning-tree Forward Selection) and XGBoost (eXtreme Gradient Boosting). Under the framework of iterative learning, the proposed method uses ISFS algorithm to make better feature selection successively by iterations. And XGBoost algorithm evaluates each feature selection by cross validation results of training data set, thus precisely finding out the optimal multi-synergistic relationships among impact features and building differentiated models with distinct feature subsets. The method accumulates information gain by re-studies from the iterative load forecasting results, manages to improve the training effect and reduce the load forecasting errors step by step. The experimental results show that the proposed method has higher load forecasting accuracy compared with other typical methods.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"113 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117190630","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}
X. Sixuan, Wang Quanquan, Zhao Feifei, Qiao Ying, Lu Zongxiang
{"title":"Topology Optimization of Offshore Wind Farm Collection System Considering Smoothing Effect","authors":"X. Sixuan, Wang Quanquan, Zhao Feifei, Qiao Ying, Lu Zongxiang","doi":"10.1109/iSPEC53008.2021.9735509","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735509","url":null,"abstract":"In China, the offshore wind generation is developed in the mode of large-scale exploiting and centralized grid connection. More and more large-scale wind power bases are planning to construct in the future. Many bases are remote from load centers inversely and located at the weak end of the interconnected bulk power network, which lead to the severe wind power loss in these areas. Based on the characteristics analysis of the large-scale wind power, the systemic economic evaluation model of the offshore wind farm collection system is established, considering the smoothing effect of wind power, the construction cost of transmission projects, the compensation cost of wind power loss, as well as the benefit of transmitting wind power. The improved genetic algorithm is proposed to optimize the model. The efficiency of the algorithm is improved, and the complex constraints are deal with, such as the non-crossover of submarine cable, through optimizing the initial population, adopting the chain table code, and using an elite selection operator. The example of wind farm topology optimization indicates that the proposed algorithm has good optimization performance and convergence.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116260221","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}
{"title":"Intelligent diagnosis method of relay protection defects based on Bayesian theory","authors":"Guo Peng, Wang Limin, Yan Zhoutian, X. Ye","doi":"10.1109/iSPEC53008.2021.9735901","DOIUrl":"https://doi.org/10.1109/iSPEC53008.2021.9735901","url":null,"abstract":"The healthy and reliable operation of relay protection devices is of great significance for improving the safe and stable operation of the power grid. Defect analysis of relay protection devices relies on manual experience. Defect diagnosis takes a long time, which leads to a long time exit of protection during defect. The existing intelligent defect diagnosis methods are carried out on a case-by-case basis, which limits the wide-scale application. This paper proposes a fault diagnosis method for relay protection devices based on Bayesian theory, establishes the correlation between the typical fault phenomenon of relay protection device and the defect diagnosis result, and derives the most likely defect result based on the defect phenomenon, with satisfactory defects diagnosis accuracy rate, which plays an important role for operators to quickly diagnose relay protection defects and improves the reliable operation status of protection devices. A practical example is used to verify the effectiveness of the method in this paper.","PeriodicalId":417862,"journal":{"name":"2021 IEEE Sustainable Power and Energy Conference (iSPEC)","volume":"226 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116316743","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}