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Data Driven control and Learning systems (DDCLS)

作者： Jiran Zhu Hua Leng Haiguo Tang Min Fan Yaling Liu Qing Yang College of Electronic and Information Engineering Tongji University Jiading Shanghai China State Grid Corporation of Hunan Electric Power corporation research institute Changsha Hunan China College of Electrical and Information Engineering Hunan University Changsha Hunan China School of Automation Chongqing University Chongqing Key Laboratory of Complex System Safety and Control (Ministry of Education) Chongqing University Chongqing China

ISBN: (数字)9781728159225

ISBN: (纸本)9781728159232

Distribution automation system (DAS) is the key of intelligent power distribution. With the construction and operation of DAS, studying on the optimization of DAS has received much attention from both academia and industry. This study proposed cluster-based relevance analysis between construction mode and benefit-cost ratio (BCR) for optimizing the DAS. This method clusters the DASs of different cities, and analyzes the clustering results. Then, the method analyzes BCR of DAS in different categories and uses comparative analysis, grey relational analysis (GRA) and sensitivity analysis to analyze the relevance between the construction mode and BCR of typical city's DAS and determine the major factors affecting the BCR comprehensively. Finally, it integrates all analysis results to make optimization suggestions for DAS. The case study shows that the method is effective and feasible, which can provide direction and reference basis for the optimization of DAS in cities of different scale.

关键词： Urban areas Principal component analysis Investment Optimization Sensitivity analysis power distribution Automation

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Optimal Capacity Pricing and Sizing Approach of Cloud Energy Storage: A Bi-level Model

Optimal Capacity Pricing and Sizing Approach of Cloud Energy...

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IEEE power and Energy Society General Meeting

作者： Hongjie He Liang Cheng Huan Zhu Lei Tang Ershun Du Chongqing Kang State Key Laboratory of Power Systems Tsinghua University Beijing China State Grid Jiangsu Electric Power Company Co. Ltd. Nanjing China Beijing Qingda Gaoke System Control Co. Ltd. Beijing China

Cloud energy storage (CES), as an innovative energy storage sharing business model, is a large-scale energy storage sharing pool that provides storage renting service to distributed consumers. In CES, distributed consumers rent virtual storage by capacity from CES and use them as actual storage. In the meanwhile, CES operator installs centralized storage and operates them centrally according to all consumers' storage demand. In this paper, from the perspective of the CES operator, we propose a bi-level model for optimal energy storage capacity pricing and sizing. In the upper-level, the CES operator makes capacity pricing and sizing decisions. The lower-level simulates the renting and operating decisions of consumers. A case study on 100 Irish residential consumers is carried out to validate the effectiveness of the proposed method.

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Investigating the Influence of Storage on Renewable Energy Capacity Credit

Investigating the Influence of Storage on Renewable Energy C...

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IEEE power and Energy Society General Meeting

作者： Pei Yong Liang Cheng Huan Zhu Lei Tang Ning Zhang Chongqing Kang State Key Laboratory of Power Systems Tsinghua University Beijing China State Grid Jiangsu Electric Power Company Co. Ltd. Nanjing China Beijing Qingda Gaoke System Control Co. Ltd. Beijing China

Renewable energy capacity credit represents the load carrying ability of renewable energy resource, and it is one of the foundations for power system adequacy analysis under high renewable energy penetration. Energy storage in the power system has the ability to balance the demand and generation instantaneously and improve the load carrying ability of renewable energy. In the capacity credit evaluation, the influence of storage should be considered. This paper evaluates the influence of storage installation on renewable energy capacity credit. simulations are conducted on IEEE RTS-79 standard test system, and the results are analyzed and explained by existing theories. Characteristics of renewable energy capacity credit with storage installation are summarized based on numerical studies.

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Comprehensive Evaluation of Microgrid Planning Scheme based on AHP- Entropy method

Comprehensive Evaluation of Microgrid Planning Scheme based ...

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2019 IEEE Sustainable power and Energy Conference, iSPEC 2019

作者： He, Jun Yang, Xiao Ling Liu, Yi Huang, Wen Tao Chen, Jun Li, Da Hu Hubei University of Technology Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System Wuhan430068 China Hubei University of Technology School of Electrical and Electronic Engineering Wuhan430064 China Hubei University of Technology Wuhan430064 China State Grid Hubei Electric Power Co. Ltd Wuhan430064 China

ISBN: (纸本)9781728149301

Microgrid has the advantages of low carbon, energy saving and economy. The development direction of distribution network is distribution network with microgrid. In order to evaluate the rationality of microgrid planning comprehensively and scientifically, this paper establishes a comprehensive evaluation index system of microgrid from four aspects: economy, reliability, basic structure of planning and environmental protection. In order to overcome the subjectivity of simple Analytic hierarchy process (AHP), AHP- entropy method is introduced to configure the weights of microgrid indexes, and a comprehensive evaluation method of microgrid planning scheme based on AHP- entropy method is proposed for the first time. Finally, an example of an island microgrid in Zhuhai is taken to verify the feasibility of the proposed method. © 2019 IEEE.

关键词： Analytic hierarchy process

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Charge Evolution and Dielectric Property of Three-phase Polypropylene Composites With Enhanced Mechanical Performance

Charge Evolution and Dielectric Property of Three-phase Poly...

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中国物理学会第二十二届全国静电学术年会

作者： Ling Zhang Zhaowei Peng Yuanxiang Zhou Zekai Lu Yonggang Guan Zixia Cheng State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department School of Electrical Engineering Zhengzhou UniversityZhengzhou 450001China

High voltage DC(HVDC)power cable technology has the advantages of large transmission capacity,low loss,negligible electromagnetic environmental effect,and trackless corridor,etc.,which make it capable to solve the significant problem of power transmission channels during the fast development of electric ***,it also contributes to eco-friendly,resource-saving,safe,and reliable goal of power transmission *** to common crosslinked polyethylene materials,isotactic polypropylene(iPP)has the advantages of non-crosslinking,high-temperature-resistant,recyclable,low production cost,and free maintenance work,and has been a hot spot in the research field of high performance HVDC cable insulating ***,iPP is a thermoplastic limited by its impact strength,especially at low temperatures,because of its high degree of crystallinity and high glass transition *** of the common methods used to increase the impact strength is the addition of low-molecular elastomer materials or nucleating agents(NAs)into the iPP matrix,which is blended with the polymer in the molten *** previous investigations with the binary blending system have demonstrated that improved impact resistance usually was accompanied by decreasing the stiffness or deteriorating its original electrical properties in some *** order to achieve an optimum balance of macroscopic properties,adding several components is often necessary in polymer *** aim of this work is to investigate the synergistic effects on mechanical and electrical properties between NAs and different elastomers in iPP *** have shown that increasing the β-crystal content can improve its electrical property and elastomer can strengthen its mechanical performance.,Thus,three-phase iPP blends(iPP-β-x,x refers to the elastomer)were prepared with the incorporation of arylamide derivative β-NAs(TMB-5,0.2 wt%)and different elastomers(15 wt%)including styrene-bethylene butylene-b-styr

关键词： isotactic polypropylene β nucleating agent elastomer impact strength space charge

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Transient Behaviors of Space Charge in Low-density Polyethylene Films at Prebreakdown Under Temperature Fields

Transient Behaviors of Space Charge in Low-density Polyethyl...

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中国物理学会第二十二届全国静电学术年会

作者： Ling Zhang Zekai Lu Yuanxiang Zhou Zhaowei Peng Zixia Cheng Yonggang Guan State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department School of Electrical Engineering Zhengzhou UniversityZhengzhou 450001China

Currently,insulation performance of high voltage DC(HVDC)power cables is still of critical significance challenge in both engineering application and fundamental *** example,HVDC cable insulation suffers breakdown under the conditions of cold start and load cycling tests,and the presence of space charge at high temperatures causes electric field distortion within the ***,the operating temperature of HVDC cables could only reach 70℃at *** work intends to carry out research on the effect of temperature on space charge characteristics of low-density polyethylene(LDPE)films at prebreakdown under a linearly ramping voltage,which is of great significance for further understanding and improving the operating temperature and breakdown strength of HVDC ***-free LDPE film with a thickness of 100 μm was purchased from GoodFellow *** improved space charge measurement system was developed with a high-speed measurement interval of 1 ms,a high voltage pulse of 120 V,and a pulse width of 5 ns.A linearly ramping voltage of 0.5 kV/s was selected and cut off after breakdown *** and steady behaviors of space charge was comprehensively sudied under a linearly ramping voltage of 500 V/s at 30℃and 70℃,*** results show that negative charge was rapidly injected and accumulated near the anode at a relatively low electric field at 70℃.As the applied electric field gradually increased,the anode appeared a significant positive charge *** phenomenon occurred when charge packets were injected to a certain distance of~30 μ*** the contrast,there was only negative charge injection and accumulation in the bulk of LDPE films at 30℃,and breakdown was not observed even when the voltage rose to-30 *** was found that the anode had a positive space charge packet injection at 30℃and slowly migrated to the cathode,and the entire transit process took tens of *** the internal electric field distribution,the ma

关键词： LDPE prebreakdown transient space charge internal field distortion carrier mobility

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Research on distribution network PMU configuration scheme based on parameter estimation accuracy

Research on distribution network PMU configuration scheme ba...

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8th Renewable power Generation Conference (RPG 2019)

作者： Chen Fang Ping Ling Tianyu Fang Yanruo Hou Hengxu Zhang Fang Shi State Grid Shanghai Municipal Power Company Electrical Research Institute Shanghai 200233 China The Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education (Shandong University) 17923 Jingshi Road Jinan PR China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

For the parameter identification requirements of active distribution network, PMU configuration needs to take into account many factors such as observability and economy. It requires to achieve optimal configuration to meet the identification accuracy requirements. Based on the multi-period measurements of SCADA and PMU deployed at both ends of distribution network line, this paper presents a PMU configuration method aiming at improving the accuracy of the overall line parameters of distribution network system. Considering the distribution network topology, PMU configuration and different noise sensitivity of branches, this paper adopts the concept of dominant parameters and nondominant parameters. And then gives the dominant parameter evaluation method, starting with the application objectives of parameter estimation and the influence of branch parameters on state estimation. Based on this model, the improved genetic algorithm is used to optimize the quantity and location of PMU configuration. The quantity of PMU configuration and dominant index are considered as fitness functions. IEEE33 buses active distribution network model is built in simulated program to obtain simulation data considering load fluctuation and measurement error. By contrast with the normal configuration, the effectiveness and efficiency of the proposed algorithm are verified.

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Method of T-connection line parameter estimation in distribution network based on PMU measurement data

Method of T-connection line parameter estimation in distribu...

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8th Renewable power Generation Conference (RPG 2019)

作者： Shu Liu Jinsong Liu Yanruo Hou Tianyu Fang Fang Shi Hengxu Zhang State Grid Shanghai Municipal Power Company Electrical Research Institute Shanghai 200233 China The Key Laboratory of Power System Intelligent Dispatch and Control of the Ministry of Education (Shandong University) 17923 Jingshi Road Jinan PR China

ISBN: (数字)9781839531248

ISBN: (纸本)9781839531255

Real-time analysis of the variation of distribution network line parameters is of great significance to improve the analysis and operation of distribution network. PMU technologies have been applied widely, which provides abundant synchronous measurement data for the distribution network line parameters estimation. In the view of widely existing T-connection line mode in distribution network, a method of T-connection line parameter estimation method based on PMU measurement data is proposed. Considering the asymmetries of three phase line load in distribution network, the single-phase line parameter estimation model based on phase component is used for T-connection line parameter estimation in this paper. The objective function is constructed based on least squares method by the PMU measured phasor voltage and phasor current information. And the Newton iteration method is used to solve the nonlinear equations to estimate the exact line parameters. The dynamic simulation data are produced by PSCAD, which is used to verify the feasibility and accuracy of the proposed method.

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arXiv

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arXiv 2020年

作者： Li, Jiashuo Zhou, Sili Wei, Wendong Qi, Jianchuan Li, Yumeng Chen, Bin Zhang, Ning Guan, Dabo Qian, Haoqi Wu, Xiaohui Miao, Jiawen Chen, Long Liang, Sai Feng, Kuishuang Institute of Blue and Green Development Shandong University Weihai264209 State Key Laboratory of Coal Combustion School of Energy and Power Engineering Huazhong University of Science and Technology Wuhan430074 China School of International and Public Affairs Shanghai Jiao Tong University Shanghai200030 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Beijing Normal University Beijing100875 China Laboratory of Anthropogenic Systems Ecology College of Engineering Peking University Beijing100871 China Department of Earth System Science Tsinghua University Beijing100871 China Institute for Global Public Policy Fudan University Shanghai200433 China School of Optical-Electrical and Computer Engineering University of Shanghai for Science and Technology Shanghai200093 China Key Laboratory of Geographic Information Science Ministry of Education School of Geographic Sciences East China Normal University Shanghai200241 China

China has implemented retrofitting measures in coal-fired power plants (CFPPs) to reduce air pollution through small unit shutdown (SUS), the installation of air pollution control devices (APCDs) and power generation efficiency (PGE) improvement. The reductions in highly toxic Hg emissions and their related health impacts by these measures have not been well studied. To refine mitigation options, we evaluated the health benefits of reduced Hg emissions via retrofitting measures during China's 12th Five-Year Plan by combining plant-level Hg emission inventories with the China Hg Risk Source-Tracking Model. We found that the measures reduced Hg emissions by 23.5 tons (approximately 1/5 of that from CFPPs in 2010), preventing 0.0021 points of per-foetus intelligence quotient (IQ) decrements and 114 deaths from fatal heart attacks. These benefits were dominated by CFPP shutdowns and APCD installations. Provincial health benefits were largely attributable to Hg reductions in other regions. We also demonstrated the necessity of considering human health impacts, rather than just Hg emission reductions, in selecting Hg control devices. This study also suggests that Hg control strategies should consider various factors, such as CFPP locations, population densities and trade-offs between reductions of total Hg (THg) and Hg2+. Copyright © 2020, The Authors. All rights reserved.

关键词： Fossil fuel power plants

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Electromechanical transient and electromagnetic transient hybrid modeling and simulation of MMC-UPFC project 13

Electromechanical transient and electromagnetic transient hy...

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13th IEEE Conference on Industrial Electronics and Applications, ICIEA 2018

作者： Xiaohui, Ye Yunlong, Fan Haifeng, Li Hang, Meng Xinli, Song Wenzhuo, Liu Yan, Zou Power System Department China Electric Power Research Institute Haidian District Beijing100192 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Source North China Electric Power University Baoding071003 China Electric Power Dispatch and Control Center State Grid Jiangsu Electric Power Company Nanjing210024 China

ISBN: (纸本)9781538637579

The construction of Jiangsu UPFC project has put forward higher requirements for the simulation and modeling of large-scale power electronics equipment. In order to deeply analyze the dynamic response of unified power flow controller based on modular multilevel converter(MMC-UPFC). The study of this paper is based on the MMC-UPFC operation principle and control strategy. We established the electromagnetic transient model framework and conducted a research of IEEE 39 case and South Jiangsu 500kV UPFC project in electromagnetic transient and electromechanical transient hybrid simulation program. Besides, a basic model framework of UPFC is also development in independent designed large-scale power system analysis software package called PSD-PSModel hybrid simulation platform and the MMC-UPFC hybrid simulation capabilities is realized. At the same time, the basic functions of the model are verified by simulation results. The achievement can provide strong technical support for further MMC-UPFC project and educational theory. © 2018 IEEE.

关键词： simulation platform

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