2018 International Conference on Power System Technology (POWERCON)最新文献

{"title":"Study on Measures to Improve the PV Hosting Capacity of Tibet Power Grid","authors":"Zaihua Li, Haibin Gao, Chao Zheng, Cuomu, S. Lv, Boqi Zhang, Yan Mei, Zhanfeng Chen, Danzengduoji, Hongcheng Zhao","doi":"10.1109/POWERCON.2018.8602011","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602011","url":null,"abstract":"Measures to improve the solar PV hosting capacity of Tibet power grid are studied. The industrial foundation of Tibet autonomous region is less developed, its load level is rather low, the power grid structure is relatively weak, and the power source mainly includes hydropower and photovoltaic, the peak regulating capacity is very limited. Therefore, its PV hosting capacity is inadequate and solar light discard rate is somewhat high (more than 30 percent often). How to improve the PV hosting capacity of Tibet power grid is an urgent problem. The main characteristics of Tibet power grid include: large capacity generator within small power system, strong DC coexists with weak AC, grid structure is rather weak. Most of the power sources in Tibet are hydropower. The proportion of PV installed is large, and the proportion of thermal power is very small and only used for peak load regulation, and they are cold standby generators. The daily peak load in Tibet appears at night, and the yearly maximum load is in winter. Therefore, Tibet power grid needs a lot of incoming power in winter while the solar light discard rate is rather high in summer. In normal operation mode, the PV outputs are limited seriously, but the capability of PV power generation to participate in frequency adjustment, to support the transient stability and voltage stability of the power grid has not been developed. According to the characteristics of Tibet power grid, three measures to improve the PV hosting capacity of Tibet power grid are studied, includes:1)Improving the active power control of the PV power station.2)Realizing globally reactive power optimized coordination control by coordinated control of reactive power compensation equipment.3)Improving the generator-grid coordination performance by changing the related parameter settings. Related control models are built, the simulation calculations results show that the above three kinds of measures can effectively improve the PV hosting capacity of Tibet power grid, the three measures have their application value respectively and can be used in combination.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"73 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122799328","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":"CCHP Capacity Optimization with User Demand Characteristics","authors":"Weixing Zhao, Qingyang Liao, Wei Xie, Zeyu Zou, Dongjie Xu, Wenze Liu","doi":"10.1109/POWERCON.2018.8602112","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602112","url":null,"abstract":"Under the background of scarcity of fossil fuels and serious environmental pollution, in order to give a full play to the advantages of tri-generation system, a configuration scheme of a Combined Cooling Heating Power (CCHP) system is provided, which adjusts to local conditions and user’s demand. Firstly, a model of the CCHP system is designed to describe the relationship of energy inputs and multiple outputs, which is connected with power grid and natural gas, and providing electricity, heat water and cool water. Then, on the basis of the proposed mathematical model of CCHP, multi-objective optimization model is put forward to allocate the CCHP capacity, which is focused on the maximum purpose of environmental and economic benefits. The optimal configuration model is supposed to meet the energy balance constraints, equipment capacity constraints and equipment operation constraints. Genetic algorithm NSGA-II is used to solve the optimization model to achieve the goal. Finally, taking the large-scale park of the Gui’an Tongji Hospital as an example, the capacity allocation scheme of the CCHP system in one specific zone is given.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122510895","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":"Optimized Coordinated Control Strategy of Assembly HVDC Breakers for MMC Based HVDC Grids","authors":"Gaoren Liu, F. Xu, Yuzhi Zhou","doi":"10.1109/POWERCON.2018.8602295","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602295","url":null,"abstract":"The assembly HVDC breaker (ASCB) can handle the dc-side fault efficiently. To overcome the shortcomings of the traditional strategy, two coordinated control strategies are proposed. The main idea is adopting the overcurrent in the dc-side as the criterion of pre-operation, and the ASCB will close in advance when it is satisfied. In the proposed strategies, the current that flows through the main breaker will be reduced, as well as the injecting current towards the ASCB from neighboring converters. The simulation result shows that the strategy is valid and feasible.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114391141","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":"The direct power transaction model between provinces considering the safety constraints and transmission loss","authors":"Ying Ding, Lin Li, B. Sui","doi":"10.1109/POWERCON.2018.8601707","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8601707","url":null,"abstract":"The reverse distribution of energy supply and demand has caused the serious problem of power supply and demand, and the direct power transaction between provinces can make full use of the inter-provincial power transmission channels to ease the problem. However, the market members participating in the direct power transaction between provinces have great differences in geographies, and the transmission loss caused by differences should not be neglected. When dealing with the direct power transaction between provinces, we do not consider the impact of transmission loss, which greatly brings on unfair trading in the market. This paper builds a direct power transaction model between provinces considering the safety constraints and transmission loss. Considering the multiple operation modes of power grid, the model puts forward the measurement method of transmission loss and studies the ordering rule of direct power transaction between provinces. The rule considers the impact of transmission loss under the premise of giving priority to prices and giving priority to energy conservation and environmental protection. The model promotes the refinement of trading methods and maintains the fairness of transactions in power market. The result is relatively stable and can be used as empirical data for practical application. The model provides decision support for the interaction between supply and demand in the power market and the optimal allocation of resources in large area.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121928834","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 Influence of Humidity on Heating and Discharge Characteristics of Polluted Zero-value Insulator","authors":"Shenghui Wang, H. Li, L. Niu","doi":"10.1109/POWERCON.2018.8602167","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602167","url":null,"abstract":"In order to study the influence of pollution on the heating and discharge characteristics of zero-value insulator and insulator string, infrared and ultraviolet imaging method were used in the experiment. Using the highest temperature and spot sequence of the insulator, with the pollution in dry and moist condition, the effect of the salt density and position of the zero-value insulator in the insulator string on the heating and discharging characteristics was analyzed. The ANSYS was used to simulate the electric and thermal field of the polluted insulator. Analysis of ANSYS simulation results under experimental conditions was consistent with the experimental results.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117030989","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":"Selective Protection Relaying in the Presence of Distributed Generation and Closed-Ring Structures","authors":"M. Biller, J. Jaeger","doi":"10.1109/POWERCON.2018.8602212","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602212","url":null,"abstract":"Adverse effects of high shares of distributed energy resources (DER) in distribution grids, like overvoltage or overloading, can be mitigated by closing open-ring structures. In order to obtain acceptable selectivity in case of faults on these closed-ring structures, an additional protection relay in the coupling point (“coupling relay is beneficial. If the coupling relay (CR) is a conventional overcurrent or distance relay, it suffers from shortcomings like a highly reduced reach towards the substation caused by the necessity to discriminate low fault currents against high currents in non-faulty operation states. Furthermore, DER fault current contributions may lead to sympathetic tripping of the CR in case of faults on adjacent feeders. The proposed CR approach overcomes those challenges by using a negative-sequence reactance criterion. The method’s reactance results are not disturbed by phenomena like fault resistance or variable DER infeed. There is no risk of sympathetic tripping and the CR can be properly coordinated with other protection relays on spur feeders of the ring. This is achieved without communication channels between the CR and other relays or DERs. The approach is validated by simulations of a typical German 20-kV-distribution grid using PSS® Sincal.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117034363","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":"A collaborative planning method for regional energy network","authors":"Chai Yufeng, Xuan Ke, Yao Cheng, Zhang Yu, Wang Yang, Zhu Xu","doi":"10.1109/POWERCON.2018.8602273","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602273","url":null,"abstract":"Single user based distributed energy system limits the economical use of energy, but this limitation can be solved with the energy network. This planning method sets up the model, which aims to reduce the annual cost (includes the costs of equipment, operation, maintenance, fuels and carbon tax) to complete the optimization of device configuration. A mixed integer linear programming model is established to determine the energy system combination, develop running strategy and build the energy transmission network. Compared with nonlinear model, under the premise that various factors are considered, the difficulty of solving the programming problem is reduced in this paper. Finally, this paper solves the model with actual data. By comparing the planning results with traditional energy supply mode, the feasibility of the method and the economy of the regional energy network are verified.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117089618","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":"Conceptual Design and Study of a 1GW VSC-HVDC Converter Platform for Offshore Wind Farm Connection","authors":"Lan Yuanliang, L. Duo, Lan Tian, Wu Xiang, Y. Hang, W. Xuejun, Lei Xianzhang","doi":"10.1109/powercon.2018.8601569","DOIUrl":"https://doi.org/10.1109/powercon.2018.8601569","url":null,"abstract":"In this paper, the current status of large-scale Offshore Wind Farm connection using VSC-HVDC converter platform is firstly investigated. Secondly, the conceptual design of a 1 GW VSC-HVDC converter platform is analyzed with respect to the main electrical circuit and topside and foundation structure. In the end, a hydrodynamic and structural finite element analysis is performed to establish the necessary structural dimensions of the topside, jacket structure, and piles. Basic loads, ultimate limit state(ULS), fatigue limit state(FLS), and float over installation of structural performance are also addressed.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128432403","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 Coordinated Control Strategy of Reactive Power Compensation Device in DC Converter Station with New-generation Synchronous Condensers","authors":"Xiao Fan, Zhou You-bin, R. Lin, Zhou Kunpeng, W. Tao, Cao Kan","doi":"10.1109/POWERCON.2018.8602002","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602002","url":null,"abstract":"In order to meet the higher demand of dynamic reactive power support is put forward in the UHV DC power transmission project, the new-generation synchronous condensers are applied in the UHV DC/AC. However, the excitation system of the new-generation synchronous condensers and the reactive power compensation device of the DC converter station are controlled individually, and there is no reasonable coordination strategy. Therefore, the transient reactive power support capability of the synchronous condenser is analyzed in this paper considering with excitation control characteristics. Then, the transient reactive power demand of the HVDC transmission system is also analyzed. Based on this, the coordinated control strategy of the reactive power compensation device in DC converter station with synchronous condensers are proposed, and a coordinated control system is given in this paper. Finally, the simulation model of the new-generation synchronous condensers access to UHV DC power grids are built based on the PSCAD software. The digital simulation results validate the proposed coordinated control strategy.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129330546","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":"Engineering Simulation Analysis and Demonstration Application of Multi-terminal DC Distribution System","authors":"Chen Liang, Jiang Mengmeng, H. Qiang, Y. Xiaodong, Luo Fei","doi":"10.1109/POWERCON.2018.8602034","DOIUrl":"https://doi.org/10.1109/POWERCON.2018.8602034","url":null,"abstract":"Based on the background of DC normal education project in the Jinji Lake core area of Suzhou Industrial Park, this paper discusses the key technologies in the practice of multi-terminal DC power distribution technology engineering. Firstly, the basic situation of Suzhou four-terminal DC project was outlined, and the key electrical equipment and its selection principle were analyzed, including the converter valves, bridge arm reactors, link transformers, and DC monitoring and protection systems. Secondly, based on the RTLAB real-time simulation platform, the simulation model of Suzhou four-terminal DC distribution system was built. Finally, based on the RTLAB simulation model, single-ended converter startup, four-terminal stable operation, active power step and reactive power step were simulated. The simulation results show that the four-terminal DC grid model has good steady state performance and active power and reactive power step response performance. It can provide reference for the future DC distribution network construction.","PeriodicalId":260947,"journal":{"name":"2018 International Conference on Power System Technology (POWERCON)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129485795","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}