2021 China International Conference on Electricity Distribution (CICED)最新文献

{"title":"Monthly electricity consumption forecast of the park based on hybrid forecasting method","authors":"Binggang Peng, Li Liu, Yanbo Wang","doi":"10.1109/CICED50259.2021.9556724","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556724","url":null,"abstract":"Along with the forecast of electricity consumption can provide the basis for the power supply enterprise to control the electricity sale market, at the same time, it can make scientific planning and guidance to the generating capacity of the electric power company, in the future development and planning of distribution network, under the the new electric power reform,the park has become an important experimental area for electric power reform, electricity consumption forecast are beginning to orient the power needs of small-scale users, due to the randomness of electricity consumption of small-scale users is large, it has great effects on the prediction results, the single exponential smoothing can only reflect the overall change of monthly electricity consumption in the park, fail to reflect the fluctuation characteristics of electricity consumption with seasonal changes.Therefore, according to the temporal characteristics of electricity consumption data, this paper combiness the design ideas of time series method and exponential smoothing method, optimizes the exponential smoothing model, introduces the time series model, and establishes a new improved model.Firstly, the seasonal decomposition model is used to carry out personalized decomposition of the electricity consumption sequence of the corresponding month, and the electricity consumption sequence is decomposed into trend component, seasonal component and random component, so as to avoid mutual interference between the predicted components.And then choose the appropriate exponential prediction model and time series models to forecast the component,this model makes use of the basic principle that the recent data has large influence on the prediction and the long-term data has little influence on the prediction, considering the characteristics of the three components change over time, using a variety of model fitting prediction, the method excludes alpha and beta parameters, the gamma smooth parameter controls the exponential decline of the seasonal component,the larger the value is , the greater the closer the observed value is to the seasonal effect weight is.The improvement of the forecast accuracy of electricity consumption can effectively reduce the cost of power generation, improve the economic and social benefits, and promote the planning and development of the distribution network in the future. In this paper, the algorithm is compiled based on R language, and the validity of the proposed method is verified and analyzed based on the actual monthly electricity consumption data of the park.The results show that this method can improve the accuracy of prediction.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"120 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133760300","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":"Medium-voltage Distribution Network Prospective Connection Planning Considering Multiple Transformation Scenarios","authors":"Ding Bin, Cai Jiaming, Xing Zhikun, Liu Zhenwei, Yuan Bo","doi":"10.1109/CICED50259.2021.9556722","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556722","url":null,"abstract":"In order to meet the needs of refined grid planning of medium voltage distribution network and improvement of standardization requirements, this paper proposes a prospective wiring optimization model of medium voltage distribution network considering multiple transformation scenarios. Firstly, two types of typical wiring forms of the prospective grid are quantitatively described; Secondly, three types of transformming and planning solutions are classified and modeled. Pareto optimization is used to coordinate the two optimization goals of construction cost and retention of the current grid. Finally, the validity and practicability of the model are verified through the analysis of a numerical example","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"130 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134406185","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":"Pole-to-ground Fault Analysis for the DC Distribution System Considering the VSC Control Modes","authors":"Qi Liu, Shouxiang Wang, Z. Wang, W. Su, Xiaolong Xiao","doi":"10.1109/CICED50259.2021.9556700","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556700","url":null,"abstract":"In DC distribution system, the unblocked converters after line faults can improve the reliability of DC power supply. The fault mechanism considering unblocked converters is affected by the control modes of converters. In this paper, with the promise that the converters will not be locked after fault, the fault mechanism and characteristics of pole-to-ground fault under the constant DC voltage control, constant AC active power control and droop control are analyzed. The conduction process of diodes and IGBTs with unblocked VSCs are analyzed. The simulation analysis is carried out on the PSCAD/EMTDC platform. The study of the fault mechanism can provide a theoretical basis for the protection of the DC distribution system.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132809512","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":"Analysis on the malfunction of zero sequence protection in 35kV ungrounded system of wind farm","authors":"Liu Zhi-qiang, Liu Wei-ming, Chen Xiao-lu, Liu Chun-Hui, Bai Yun-Peng, Xu Cai","doi":"10.1109/CICED50259.2021.9556659","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556659","url":null,"abstract":"Due to the wind farm 35kV system single-phase grounding fault capacitance current is relatively large, Therefore, the wind farm 35kV system adopts the bus configuration Z-type grounding transformer and the neutral point is grounded by small resistance, Zero sequence protection are used to quickly remove the single phase ground fault.In this paper, the single-phase ground fault of wind power plant collection wire in Eastern Inner Mongoliais is taken as an example. introduces the working principle of zero sequence current transformer,Clarify the setting and matching principles of zero sequence protection,,Comparing the different wiring modes of several cable shielding layers will be cause how Influence on the secondary measurement current of zero-sequence transformer, Analyze the zero sequence protection rejection of the set wire,The cause of the grounding tripping event. Summarizes the cable shield connection mode correctly,And propose rectification measures on site.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125731447","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":"Research on the Maximum Penetration Capacity of Distributed PV Based on Firework Algorithm","authors":"Yu Tengkai, Li Jifeng, Li Xiaojun, L. Xiaoming, L. Tiecheng","doi":"10.1109/CICED50259.2021.9556672","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556672","url":null,"abstract":"For the maximum penetration capacity problem of distributed PV, a computational model with power equation, node voltage, line capacity and distributed PV capacity as the main constraints is established, and an improved firework algorithm is proposed to solve the above model. Based on the semi-positive cloud generator to improve the explosion spark generation method, a large number of displacement deviations with stable propensity and randomness are obtained, increasing the population diversity and speeding up the convergence; the dimensional difference strategy is used to improve the variance operator, which is conducive to the search for the late jump out local optimum. Apply the algorithm to the CIGER6 Task Force system and verify the validity of the algorithm. The results show that the proposed algorithm is able to solve the penetration level calculation problem of distributed PV.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125237097","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":"Design of Intelligent Operation and Maintenance Knowledge Base for Power Metering Verification Device Based on LDA Model","authors":"Yalun Chen, Mingze Gao, Xin Zhang","doi":"10.1109/CICED50259.2021.9556685","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556685","url":null,"abstract":"The manual operation and maintenance of the measurement verification device has the problems of low efficiency and error-prone. In this paper, a method for construction of the knowledge base of intelligent metering system is proposed based on the Latent Dirichlet Allocation (LDA). Through the fault similarity calculation method of cosine similarity, input fault phenomenon and output fault processing method, intelligent recommendation of fault processing method is realized. The actual application shows that this knowledge base can improve the operation and maintenance efficiency and reduce the operation and maintenance cost without affecting the measurement verification work.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129139132","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":"Design of Controller and Router for Orderly Charging System of Electric Vehicle","authors":"Wei Liu, Yongchun Liu, Liangliang Chen","doi":"10.1109/ciced50259.2021.9556816","DOIUrl":"https://doi.org/10.1109/ciced50259.2021.9556816","url":null,"abstract":"With the world's attention to energy and environmental issues, the number of electric vehicle users is increasing year by year. However, the disorderly charging of electric vehicles will aggravate the uncertainty of the power grid, leading to \"peak-on-peak\" of residential load, forcing the capacity of power supply equipment needs to be increased and expanded, and resulting in a decline in the utilization rate of power supply equipment, which is adverse to the stable and economic operation of the power grid. Therefore, it is essential to develop a new generation of orderly charging system, which involves users, electric vehicles, AC charging piles, energy controllers, energy routers, service platforms and others. This article mainly develops energy routers and energy controllers that meet the demand for orderly charging. The energy controller is responsible for generating the local control strategy for orderly charging of electric vehicles, realizing the orderly operation of energy routers, and uploading and synchronizing the grid information and charging information of electric vehicles to the service platform in real time, to support the real-time monitoring and strategy adjustment of orderly charging of electric vehicles. The energy router (a new generation of smart meters) is responsible for the data collection of electric vehicles, energy storage, distributed power sources, microgrids, thermal storage electric heating and other new energy-consuming equipment. It has the ability of local networking and regional autonomy, and supports two ways of interacting with customers including master station and Bluetooth. The energy router and energy controller designed by the system have the advantages of small size, low power consumption, high accuracy, and strong anti-interference ability, which can meet the application of orderly charging of electric vehicles in different occasions.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128976411","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":"Design and Fault Simulation Verification of Hybrid Simulation Platform of Distribution Network Cyber Physical System","authors":"Jiaqi Liu, Tianyuan Kang, Cheng Xie, Xueshun Ye, Xiang Sun, Jinhui Zhou","doi":"10.1109/CICED50259.2021.9556776","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556776","url":null,"abstract":"With the development of automatization and informationization, distribution network has gradually become into a typical Cyber Physical System (CPS). For the deep integration system of communication and power physical system, this paper proposes a hybrid simulation architecture of distribution network CPS based on the combination of information control layer, communication layer and physical layer, and a digital analog hybrid simulation platform of distribution network CPS is bulit. At the same time, based on the data of actual distribution network, a 62 node CPS test example is designed. The performance of digital analog hybrid simulation platform of distribution network CPS is verified through the CPS concurrent fault scenario, and the feasibility of 62 node CPS test example is evaluated through the hybrid simulation platform.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127652414","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":"Research on coordinated dispatching of wind power consumption in integrated energy system based on flexible equipment","authors":"Shuchao Liang, Li Liu, Tianhe Sun, Baoshi Wang","doi":"10.1109/CICED50259.2021.9556723","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556723","url":null,"abstract":"Due to the randomness and volatility of wind power output, large-scale integration of wind power intensifies the phenomenon of wind power curtailment and power limitation, resulting in serious waste of clean energy of wind power. From the point of view of improving system flexibility, this paper takes CHP, electric boiler and heat storage device as the flexible equipment of integrated energy system, and constructs a coordinated dispatching model of comprehensive energy system with various flexible equipment for wind curtailment and absorption. The model takes into account the operation cost and purchasing cost of the system. In order to reduce wind power curtailment rate, the curtailment wind penalty cost is added to the target. Through the analysis of a variety of heating modes, based on meeting a certain load and heat load, the daily scheduling plan is optimized by minimizing the cost of the system as the goal. The influence of adding flexible equipment on wind power curtailment is analyzed. The results show that the model can improve the wind power consumption capacity and system flexibility.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117070564","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":"Study on thermal decomposition characteristics of environmentally friendly insulating medium C5F10O and C5F10O/air mixture","authors":"Yunkun Deng, Tao Yang, Jisheng Huang, Lin Jiao, Haibo Zhao","doi":"10.1109/CICED50259.2021.9556690","DOIUrl":"https://doi.org/10.1109/CICED50259.2021.9556690","url":null,"abstract":"In recent years, C<inf>5</inf>F<inf>10</inf>O is considered to be one of the most potential candidate gas for SF<inf>6</inf> in gas insulation equipment because of its excellent electrical performance and environmental protection advantages. However, there are few studies on the decomposition of C<inf>5</inf>F<inf>10</inf>O and its mixture with air. In this paper, the decomposition characteristics of C<inf>5</inf>F<inf>10</inf>O and C<inf>5</inf>F<inf>10</inf>O-air mixtures were studied on the established thermal decomposition simulation experimental platform. Gas chromatography-mass spectrometry was used to detect the decomposition products. With the increase of temperature, the decomposition of C<inf>5</inf>F<inf>10</inf>O increases. The main decomposition products are CF<inf>4</inf>, CO<inf>2</inf>, C<inf>2</inf>F<inf>6</inf>, CF<inf>2</inf>O, C<inf>3</inf>F<inf>8</inf>, C<inf>4</inf>F<inf>10</inf>, C<inf>4</inf>F<inf>10</inf>O, C<inf>4</inf>F<inf>8</inf>O, etc. With the increase of temperature, the type and content of decomposition products increase. The results show that the mixture of C<inf>5</inf>F<inf>10</inf>O and C<inf>5</inf>F<inf>10</inf>O-air has good thermal stability at 300 °C. Decomposition of C<inf>5</inf>F<inf>10</inf>O increases with the increase of temperature, and the types of decomposition products increase. O<inf>2</inf> in C<inf>5</inf>F<inf>10</inf>O-air mixture is involved in the decomposition reaction, and CO<inf>2</inf> is the main product and causes the chamber pressure to rise. At the same time, the research results can provide reference for the application of air as a buffer gas of C<inf>5</inf>F<inf>10</inf>O.","PeriodicalId":221387,"journal":{"name":"2021 China International Conference on Electricity Distribution (CICED)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-04-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121457906","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}