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2021 International Conference on Power System Technology (POWERCON)最新文献

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Utilization of Electrochemical Energy Storage System with External Characteristics of Voltage Source for Independent Voltage Support in Power Systems 具有电压源外特性的电化学储能系统在电力系统独立电压支撑中的应用
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697752
Shang Zhang, Xiaohui Qin, Jian Zhang, Chunmeng Chen
{"title":"Utilization of Electrochemical Energy Storage System with External Characteristics of Voltage Source for Independent Voltage Support in Power Systems","authors":"Shang Zhang, Xiaohui Qin, Jian Zhang, Chunmeng Chen","doi":"10.1109/POWERCON53785.2021.9697752","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697752","url":null,"abstract":"The increasing penetration of renewable energies poses a threat to the voltage stability of power system. Energy storage technology can be utilized for voltage support in the power system with high proportion of renewables. The external characteristic of traditional energy storage system (ESS) performs as a current source, which only passively responds to the variations in power system after disturbance. In this paper, the model of electrochemical energy storage system with external characteristics of the voltage source is proposed. The control strategies of ESS are established based on the virtual synchronous generator (VSG) algorithm, in order to emulate the electromotive force and inertia of traditional synchronous generator. Application results of a practical power system in Northwest China show that the proposed model can provide independently voltage support, and effectively improve the consumption and delivery capacity of renewable energies.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115231972","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}
引用次数: 0
Locational marginal pricing-oriented transmission network expansion planning with consideration of line capacity sensitivity 考虑线路容量敏感性的区位边际定价输电网扩容规划
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697882
Liu Yang, Liu Fang, Gou Jing, Pangtuo Bo, Han Yuqi, Wang Fuyang, L. Youbo
{"title":"Locational marginal pricing-oriented transmission network expansion planning with consideration of line capacity sensitivity","authors":"Liu Yang, Liu Fang, Gou Jing, Pangtuo Bo, Han Yuqi, Wang Fuyang, L. Youbo","doi":"10.1109/POWERCON53785.2021.9697882","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697882","url":null,"abstract":"Under the market environment, the traditional power grid expansion planning model is difficult to reflect the quantitative impact on the power grid investment income by global supply, demand situation, the willingness of market players and social benefits under the competitive market model in the future. In the high proportion hydropower grid, the mismatch between the capacity of hydropower transmission section and the difference between the high and low power flow leads to network congestion and trade surplus. In this paper, a transmission network expansion planning model based on the market-oriented electricity price is proposed in a high-proportion hydropower scenario. The upper level model maximizes the investment income and forms a planning decision line. The lower layer adopts the improved K-means clustering algorithm to obtain the typical annual operation mode of the high-proportion hydropower grid. Based on the market transaction clearing results and regional load response characteristics, it quantifies the post-load increment and over-network utilization rate of line planning and guides the power grid expansion planning with market price signals to promote the regional hydropower resources consumption. KKT optimal conditions are used to realize the coupling of the upper and lower layers of the model. The bi-level programming problem is transformed into a mixed integer programming problem for stable solution. Finally, a practical power grid with high proportion of hydropower in southwest China is taken as an example. The influence of market signal of high proportion of hydropower connected to the extended planning result is verified by comprehensively comparing the congestion surplus, investment income and proportion of hydropower consumption with different planning methods.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115359502","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}
引用次数: 0
Short-term Wind Power Forecast based on Teleconnected NWP Information 基于远程互联NWP信息的短期风电预测
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697861
Jiaming Li, Ying Qiao, Zhifeng Liang, Zongxiang Lu
{"title":"Short-term Wind Power Forecast based on Teleconnected NWP Information","authors":"Jiaming Li, Ying Qiao, Zhifeng Liang, Zongxiang Lu","doi":"10.1109/POWERCON53785.2021.9697861","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697861","url":null,"abstract":"Accurate short-term wind power forecast (WPF) is essential for power system with high proportion of renewable energy (RE) integration. Teleconnected information of numerical weather predictions (NWPs) can give more abundant meteorological information for short-term WPF so as to improve the accuracy. A novel short-term WPF system considering teleconnected NWPs is established in this paper. Firstly, the relationship between teleconnected NWPs and wind power is analyzed quantitatively. Furthermore, a data cleaning (DC) strategy and WPF model structure combining teleconnected NWPs are design. We apply our algorithm based on actual operation data of a Shandong wind farm. Results show that after applying the framework built in this paper, the performance of common used short-term WPF models such as support vector regression (SVR), multi-layer perceptron (MLP) and long short-term memory (LSTM) have been improved effectively.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124305437","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}
引用次数: 2
Design and Application of Power Grid Security Risk Assessment and Hierarchical Control System in Natural Disasters 自然灾害下电网安全风险评估与分级控制系统的设计与应用
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697865
Kang Chang, Chen Yu, Shaofeng Liu, Yan Huang, Wei Li
{"title":"Design and Application of Power Grid Security Risk Assessment and Hierarchical Control System in Natural Disasters","authors":"Kang Chang, Chen Yu, Shaofeng Liu, Yan Huang, Wei Li","doi":"10.1109/POWERCON53785.2021.9697865","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697865","url":null,"abstract":"Due to the failure uncertainty caused by natural disasters, it is of importance to expand the security analysis of power system based on deterministic rules to the risk analysis, to expand traditional security margin control based on deterministic scenarios to risk control. In this paper, the characteristics of clustered faults in natural disasters are analyzed firstly. Secondly, the security risk index system of power grid in natural disasters is designed from six dimensions, and the normalized method of multi-dimensional security risk index is proposed. Further, the risk hierarchical decision-making technology of power grid based on the coordination between risk and cost is proposed. On this basis, the architecture of risk assessment and preventive control system based on provincial and regional coordination is designed. Finally, The effectiveness of the proposed method is verified by a practical operation case of a provincial power grid.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124390222","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}
引用次数: 0
Analysis of transient frequency voltage coupling characteristics for power systems with a high share of wind power 风电占比高的电力系统暂态频率电压耦合特性分析
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697586
Cheng Yong, Xueping Pan, Wei Liang, Haidong Chen, Wei Li, Ling Zhu
{"title":"Analysis of transient frequency voltage coupling characteristics for power systems with a high share of wind power","authors":"Cheng Yong, Xueping Pan, Wei Liang, Haidong Chen, Wei Li, Ling Zhu","doi":"10.1109/POWERCON53785.2021.9697586","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697586","url":null,"abstract":"Presently, with the continuous integration of wind power, power system transient stability characteristics have changed significantly. The enhanced coupling between voltage and frequency increases the risk of system cascading faults. In this paper, the power-voltage characteristics of wind turbine generator (WTG) during low voltage ride through (LVRT) are analyzed firstly, and the frequency-voltage interaction in power systems with a high share of wind power is analyzed from aspects of frequency responses and voltage responses, respectively. Secondly, taking a simple receiving power grid as an example, the possible low-frequency low-voltage (LFLV) or low-frequency high-voltage (LFHV) problem may occur when there is a fault on the AC or DC transmission line, and it is pointed out that increase of wind power share will further worsen the LFLV or LFHV problems. Finally, the influence of wind power share on system frequency and voltage interaction is simulated on the simple receiving system, and also the Chinese central Tibet power grid with a high share of photovoltaic generation, to show the risks of LFLV and LFHV problems.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114575424","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}
引用次数: 2
Initialization of DFIG Wind Turbine for Electromagnetic Transients Simulation DFIG风力机电磁瞬变仿真初始化
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697688
Mu Shixia, Wan Hongfu, Liu Tao, Li Xia, Dai Hanyang, Xiao Xiong
{"title":"Initialization of DFIG Wind Turbine for Electromagnetic Transients Simulation","authors":"Mu Shixia, Wan Hongfu, Liu Tao, Li Xia, Dai Hanyang, Xiao Xiong","doi":"10.1109/POWERCON53785.2021.9697688","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697688","url":null,"abstract":"Because of a large number of power electronics and control equipment in power grid, the zero-state initialization for the electromagnetic transient simulation takes a lot of simulation time, and even cause the simulation start-up failure. In order to solve the initialization problem of electromagnetic transient simulation of doubly fed induction generator (DFIG) wind turbine, an initialization calculation method based on power flow and control parameters was proposed in this paper. Based on the induction generator steady-state circuit and the relationship between the modulation voltage of the control system and the AC/DC voltage of the converter, the electrical components and control system were initialized separately in a modular way. The flat start-up of electromagnetic transient simulation of DFIG wind turbine was realized. It solved a series of initialization problems of traditional electromagnetic transient simulation software, such as long simulation start-up time, manual intervention and even start-up failure. Finally, the electromagnetic transient simulation program is developed in C ++ language and compared with the PSCAD/EMTDC simulation. The effectiveness and correctness of the proposed initialization method are proved.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114817335","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}
引用次数: 0
Total Transfer Capacity Calculation with Large Scale Wind Power Considering Power Curtailment 考虑弃风的大规模风电总输送容量计算
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697543
Xiaozhe Song, Fushou Sun, P. Gao, Xin Liu, Xiaojing Li, Jiaqi Li
{"title":"Total Transfer Capacity Calculation with Large Scale Wind Power Considering Power Curtailment","authors":"Xiaozhe Song, Fushou Sun, P. Gao, Xin Liu, Xiaojing Li, Jiaqi Li","doi":"10.1109/POWERCON53785.2021.9697543","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697543","url":null,"abstract":"This paper presents a power curtailment based method to assess inter-regional total transfer capability (TTC) after large-scale integration of wind power into grids. Firstly, a mathematical model considering wind power correlation is established based on Copula function. Then TTC of each sample generated by Monte Carlo is solved one by one so as to screen valid samples. Moreover, a TTC bi-level assessment model is developed, in which wind power curtailment is minimized by wind output constraint, in order to improve the inter-regional TTC The effectiveness of the proposed method is verified by experiments on test system PJM-5.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117187989","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}
引用次数: 0
Calculation of Mixed Electric Field on the Body Surface of Live Workers on UHV AC/DC Transmission Lines in the Same Corridor 同一走廊特高压交直流输电线路现场作业人员体表混合电场计算
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/powercon53785.2021.9697755
A. Ma, Yongxiang Bi, Xintao Chen, Jie Wang
{"title":"Calculation of Mixed Electric Field on the Body Surface of Live Workers on UHV AC/DC Transmission Lines in the Same Corridor","authors":"A. Ma, Yongxiang Bi, Xintao Chen, Jie Wang","doi":"10.1109/powercon53785.2021.9697755","DOIUrl":"https://doi.org/10.1109/powercon53785.2021.9697755","url":null,"abstract":"When UHV AC and UHV DC lines run in the same corridor, the AC/DC mixed electric field in the live working area is more complex. To ensure the safety of workers, it is essential to accurately analyze the electric field on the surface of workers to guide safety protection. In this paper, combined with the actual ±1100kV DC and 1000kV AC lines, a three-dimensional calculation model is established. The mixed field strength on the body surface of live working operator is calculated by using the three-dimensional charge simulation method and Deutsch hypothesis, and the distribution law of mixed field strength on the body surface of worker is analyzed. The results show that when the distance between the operator and the conductor is 0.4m, the maximum electric field on the body surface reaches 1921kV/m. The method can predict the mixed electric field on the body surface when the operators carry out live working on the AC/DC corridor line, and provide the theoretical basis for the live working on the parallel UHV AC DC line.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116034133","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}
引用次数: 0
A Method Of Active Power Random Allocation For Power Grid Stability Analysis 电网稳定性分析中的有功随机分配方法
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697535
Zhaohui Qie, Zhaowei Li, Wei Li, Jian Gao, Qu Shi
{"title":"A Method Of Active Power Random Allocation For Power Grid Stability Analysis","authors":"Zhaohui Qie, Zhaowei Li, Wei Li, Jian Gao, Qu Shi","doi":"10.1109/POWERCON53785.2021.9697535","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697535","url":null,"abstract":"With the gradual development of artificial intelligence technology in the field of power grid simulation and analysis, in order to overcome the problems of weak typicality of online samples and slow production speed of offline samples, it is necessary to study the automatic sample generation technology. If the unit output is completely random and the data is generated according to the constraint screening method, the screening efficiency is low under the constraint of the total active power sum equation, and the unit output probability density can not be controlled, so it is easy to over fit or under fit. In engineering, two steps are given to realize the generation of active power scheme and the allocation of active power. The allocation scheme satisfying the constraints of total active power and security inequality is generated. Through the mechanism of random allocation of active power and random rotation of units, the distribution of active power of units is ensured to be average. In the active power distribution of multiple units, the effectiveness of the proposed method and the necessity of random rotation of units are proved by the spatial distribution of unit output.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123689821","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}
引用次数: 0
Research on Variable Speed Pumped Storage to Improve the Stable Operation Capability of Combined System 提高联合系统稳定运行能力的变速抽水蓄能研究
2021 International Conference on Power System Technology (POWERCON) Pub Date : 2021-12-08 DOI: 10.1109/POWERCON53785.2021.9697715
Junjie Sun, Shichuan Feng, Jianyuan Xu, Xinwei Li, Peng Yuan, Xiaoheng Zhang
{"title":"Research on Variable Speed Pumped Storage to Improve the Stable Operation Capability of Combined System","authors":"Junjie Sun, Shichuan Feng, Jianyuan Xu, Xinwei Li, Peng Yuan, Xiaoheng Zhang","doi":"10.1109/POWERCON53785.2021.9697715","DOIUrl":"https://doi.org/10.1109/POWERCON53785.2021.9697715","url":null,"abstract":"Variable speed pumped storage unit has a good peaking capability. In order to solve the fluctuation of the output power of photovoltaic cells, a combined system of variable-speed pumped storage and flexible direct current(DC) transmission is constructed to improve the stability of the grid. Construct a combined system model to study variable speed pumped storage unit under the fluctuation of photovoltaic output to improve the stable operation ability of the combined system. The variable speed pumped storage unit-photovoltaic-flexible DC transmission combined system model was built in Matlab, and different photovoltaic output modes were set. Finally, the simulation characteristics of variable speed pumped storage are obtained. Variable speed pumped storage has significantly improved the stable operation capability of the combined system.","PeriodicalId":216155,"journal":{"name":"2021 International Conference on Power System Technology (POWERCON)","volume":"111 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122038769","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}
引用次数: 0
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