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The optimal deployment model of energy storage systems considering large-scale wind farms connected

IOP Conference Series: Earth and Environmental Science 2018年第1期146卷

作者： T Yan M X Zhang X F Song B Z Liu Y Huang State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Haidian District Beijing 100192 China State Grid Xinjiang Electric Power Company Economic Research Institute Urumqi 830011 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China

In order to solve the serious wind power curtailment problem caused by the rapid development of large-scale wind power, a multi-point layout energy storage system is proposed in the grid with the large proportion of wind power. Considering the energy storage costs, wind power curtailment costs and the penalty for loss of load, the energy storage planning model is established by introducing the problem of unit commitments with restrictions, which can be solved by using the mature commercial software CPLEX. Finally, taking the standard IEEE 24 node system as an example, different case studies are carried out. It is found that energy storage cost, wind farm location and access power have an important influence on energy storage layout and configuration capacity.

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Optimal Configuration of Large-Scale Storage Energy Access to Actual power Grid with High Wind power Proportion

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IOP Conference Series: Earth and Environmental Science 2019年第6期237卷

作者： T Yan M X Zhang X F Song C X Li H Sheng B Z Liu State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Haidian District Beijing 100192 China State Grid Xinjiang Electric Power Company Economic Research Institute Urumqi 830011 China State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power University Beijing 102206 China

In order to solve the problem of abandoned wind power in new energy high permeability grid, a large-scale energy storage device optimization configuration algorithm is proposed. At the same time, the energy storage cost, the abandonment cost and the loss of load cost are taken into consideration, and an optimization model is established considering various operational constraints and solved through the mature commercial software CPLEX. Finally, the 750kV system obtained by the actual grid equivalent is taken as an example to obtain an optimal configuration scheme for energy storage in the actual power grid.

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Improved active damping control strategy and closed-loop parameter design for LCL grid-connected inverter

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Journal of Physics: Conference Series 2021年第1期2030卷

作者： Qi Chen Hongbo Liu Qingxiang Hao Yikun Yin Yuanhong Li Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Ministry of Education Northeast Electric Power University Jilin 132012 China Zaozhuang Power Supply Company State Grid Shandong Electric Power Company Zaozhuang 277000 China Changchun Institute of Technology ChangChun 130012 China

In this paper, an active damping control strategy based on capacitance and voltage feedback is proposed to solve the resonance problem of three-phase LCL inverter grid-connected system. To solve the problem that the parameters of active damping control strategy are complicated and need to be adjusted repeatedly, a parameter design method is proposed in this paper, which is simple to implement and does not need to be adjusted repeatedly. Finally, the effectiveness of the control strategy and parameter design method is verified by experiments.

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An Efficient Plasma Regeneration of As-Poisoned V2O5-Based Catalyst for Simultaneous Poison Removal and Activity Enhancement

SSRN

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SSRN 2024年

作者： Yin, Yong Li, Kezhi Jiang, Si Peng, Yue Zhu, Tianle Sun, Yifei Li, Junhua Li, Xiang School of Energy and Power Engineering Beihang University Beijing100191 China Institute of Engineering Technology Sinopec Catalyst Co. Ltd. Beijing101111 China State Key Joint Laboratory of Environment Simulation and Pollution Control School of Environment Tsinghua University Beijing100084 China School of Materials Science and Engineering Beihang University Beijing100191 China School of Environmental Science and Engineering Hainan University Haikou570228 China Research Center for Advanced Energy and Carbon Neutrality Beihang University Beijing100191 China

Regeneration of highly toxic Arsenic (As) poisoned SCR catalysts is a huge challenge, because the strong interactions between As and the active component often leads to the loss or damage of active sites during the regeneration process. Herein, we develop a low-temperature plasma regeneration method that not only selectively removes As but also preserves the active components for commercial V2O5-WO3/TiO2 catalyst. More intriguingly, the catalyst after plasma regeneration achieves a significant catalytic performance enhancement, far surpassing the fresh V2O5-WO3/TiO2 catalyst. Under optimized regeneration conditions, the regenerated catalyst exhibits an As removal rate exceeding 99.5 ± 0.2% within 240 s, and a TOF value that was 11.1 and 2.4 times of the poisoned and fresh catalyst. Structural characterization reveals that the enhanced intrinsic activity of regenerated catalyst mainly stems from the As complete removal and subsequent transformation of monomeric VOx species into polymeric ones under H2 plasma environment. Multiple spectroscopic monitoring techniques unveil three stages in the plasma treatment process: (1) As reduction and removal, (2) surface polymerization of VOx species, and (3) vanadium embedded into TiO2 lattice. At low temperatures, the well regenerated catalysts with abundant polymeric VOx facilitate the nitrate-assisted dehydrogenation of adsorbed NH3 to key NH2 intermediates, thereby achieving superior NH3-SCR catalytic performance. This study not only provides a rapid regeneration strategy for poison selective separation from spent catalysts but also offers new insights into the precise control and design of active sites. © 2024, The Authors. All rights reserved.

关键词： Temperature

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Probabilistic Harmonic Analysis on Distributed Photovoltaic Integration Considering Typical Weather Scenarios

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IOP Conference Series: Materials Science and Engineering 2017年第1期199卷

作者： Che Bin Yu Ruoying Dang Dongsheng Wang Xiangyan State Grid Ningxia Electric Power Company Economic Research Institute Yinchuan 750002 Ningxia China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute. Beijing 100192 China

Distributed Generation (DG) integrating to the network would cause the harmonic pollution which would cause damages on electrical devices and affect the normal operation of power system. On the other hand, due to the randomness of the wind and solar irradiation, the output of DG is random, too, which leads to an uncertainty of the harmonic generated by the DG. Thus, probabilistic methods are needed to analyse the impacts of the DG integration. In this work we studied the harmonic voltage probabilistic distribution and the harmonic distortion in distributed network after the distributed photovoltaic (DPV) system integrating in different weather conditions, mainly the sunny day, cloudy day, rainy day and the snowy day. The probabilistic distribution function of the DPV output power in different typical weather conditions could be acquired via the parameter identification method of maximum likelihood estimation. The Monte-Carlo simulation method was adopted to calculate the probabilistic distribution of harmonic voltage content at different frequency orders as well as the harmonic distortion (THD) in typical weather conditions. The case study was based on the IEEE33 system and the results of harmonic voltage content probabilistic distribution as well as THD in typical weather conditions were compared.

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Research on SVG Electromagnetic Transient simulation Technology of Large-scale Offshore Wind power Base

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Journal of Physics: Conference Series 2020年第2期1624卷

作者： Liping Gao Guanghui Li Xin He Chong Shao Yanxia Sun Xing Zhang Keke Liu State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems (China Electric Power Research Institute) Haidian District Beijing 100192 China State Grid Gansu Electric Power Company Lanzhou City Gansu Province 730050 China

Based on the control hardware in-loop simulation technique, the article built the SVG control hardware in-loop electromagnetic transient real-time simulation platform, and completed the simulation analysis of the transient reactive response characteristics of the SVG controller under the ideal grid. Relying on the SVG control hardware in-loop simulation platform, using code encapsulation cryptography, a pure digital model of the SVG control system dynamic link library was established. The feasibility of the SVG control hardware in-loop real-time simulation platform and DLL model was verified by 'three-line check' of the control hardware in-loop simulation model - DLL model - field experimental data curve, which provides a simulation analysis solution for the analysis of SVG transient response characteristics of large-scale offshore wind bases.

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印度大停电与继电保护的三大功能

印度大停电与继电保护的三大功能

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2012年中国智能电网学术研讨会

作者： DONG Xin-zhou 董新洲 CAO Run-bin 曹润彬 WANG Bin 王宾 SHI Shen-xing 施慎行 Dominik Bak State Key Lab of Control and Simulation of Power Systems and Generation Equipments Tsinghua Universi 清华大学电力系统及发电设备安全控制和仿真国家重点实验室北京 100084

简介了印度电网在2012年7月30日和7月31日发生的两起大停电事故。两起事故均起源于同一回输电线路距离保护Ⅲ段因过负荷保护动作跳闸，并导致其他设备继电保护的不合理动作而引发连锁跳闸，造成大面积停电。印度大停电事故暴露了现有电... 详细信息

简介了印度电网在2012年7月30日和7月31日发生的两起大停电事故。两起事故均起源于同一回输电线路距离保护Ⅲ段因过负荷保护动作跳闸，并导致其他设备继电保护的不合理动作而引发连锁跳闸，造成大面积停电。印度大停电事故暴露了现有电力系统的脆弱性，尤其是继电保护在过负荷和系统振荡情况下的动作缺陷。基于对停电事故中继电保护行为的分析，提出了满足现代电网需求的继电保护三大功能：面向系统安全的系统保护功能、预防性保护功能和快速切除故障设备功能。

关键词：停电事故继电保护过负荷故障处理

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Polymeric insulating materials characteristics for high-voltage applications

Nature Reviews Electrical Engineering

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Nature Reviews Electrical Engineering 2024年 516-528页

作者： Tian-Yu Wang Gui-Xin Zhang Zhi-Min Dang Jie Mao Boya Zhang State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing China Department of Chemical and Biomolecular Engineering University of California Los Angeles CA USA School of Chemistry and Chemical Engineering State Key Laboratory of High-Efficiency Utilization of Coal and Green Chemical Engineering Ningxia University Yinchuan China State Key Laboratory of Electrical Insulation and Power Equipment Xi’an Jiaotong University Xi’an China

Large-scale power system transmission and transformation equipment operates in high-voltage environments, placing notable requirements on the insulation strength of polymers used in core insulation frameworks. Increasing the polymer insulation performance in high-voltage environments is crucial for protecting large-capacity and integrated power equipment and ensuring the safe and stable operation of electrical devices. Here, we discuss the phenomena and the underlying mechanisms of bulk breakdown and surface flashover that lead to insulation failure in polymers and present relative strategies to increasing the performance of the insulating materials. We analyse the challenges faced by polymeric insulating materials in various extreme environments and the strategies to address them. Finally, we identify key challenges and highlight future directions and opportunities for the development of reliable polymeric insulating materials.

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Efficient Photocatalytic Degradation of Antibiotics in Water by a Novel Niln2s4/Uio-66 Z-Scheme Heterostructure

SSRN

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SSRN 2022年

作者： Wang, Anhu Liang, Huagen Chen, Fu Tian, Xinlong Jing, Shengyu Tsiakaras, Panagiotis Jiangsu Key Laboratory of Coal-based Greenhouse Gas Control and Utilization Low Carbon Energy Institute China University of Mining and Technology Xuzhou221008 China School of Materials Science and Engineering China University of Mining and Technology Xuzhou221008 China Key Laboratory of Fuel Cell Technology of Guangdong Province Guangzhou510640 China State Key Laboratory of Marine Resource Utilization in South China Sea Hainan Provincial Key Lab of Fine Chemistry School of Chemical Engineering and Technology Hainan University Haikou570228 China School of Information and Control Engineering China University of Mining and Technology Jiangsu Xuzhou221008 China Laboratory of Electrochemical Devices based on Solid Oxide Proton Electrolytes Institute of High Temperature Electrochemistry RAS Yekaterinburg620990 Russia Laboratory of Materials and Devices for Electrochemical Power Industry Institute of Chemical Engineering Ural Federal University 19 Mira Str. Yekaterinburg620002 Russia Laboratory of Alternative Energy Conversion Systems Department of Mechanical Engineering School of Engineering University of Thessaly 1 Sekeri Str. Pedion Areos 38834 Greece

Photocatalysis is considered an economical, environmentally friendly, and effective technology for removing pollutants. The construction of Z-Scheme heterojunctions has been identified as one of the feasible solutions capable of enhancing the photocatalytic activity. Herein, a series of visible light responsive photocatalysts (NiIn 2 S 4 /Uio-66 composites) with excellent activity and stability were prepared by using a solvothermal process. It is found that 20 mg L -1 of tetracycline (TC) could be completely degraded under visible light irradiation within 1 h, when the mass ratio of NiIn 2 S 4 to Uio-66 is 0.5:1 (NISU-0.5) and the solution pH=11. In addition, after six cycles, the degradation rate of tetracycline photocatalyzed by NISU-0.5 still reach up to 90%. Ultraviolet photoelectron spectra (UPS), X-ray photoelectron spectra (XPS) and electron spin resonance measurements (ESR) confirm the formation of the Z-Scheme heterostructure between NiIn 2 S 4 and Uio-66. The synergistic effect between built-in electric field, energy band bending and coulomb interactions in interface of Z-Scheme heterojunction is conducive to restrain the recombination of photogenerated electrons and holes, which greatly improve the photocatalytic activity. In conclusion, this study offers a new thought for design and synthesis of Z-Scheme heterojunctions and provides a cost-effective strategy for solving environmental pollution and energy problems in the future. © 2022, The Authors. All rights reserved.

关键词： Heterojunctions

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Open Architecture Design of Universal Terminal for Multiple Measurement and control Scenarios of Distribution Network

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IOP Conference Series: Earth and Environmental Science 2021年第2期651卷

作者： Ruifeng Zhang Xiaobing Xiao Hao Tian Yongxiang Cai Yu Fu Hongliu He Electric Power Research Institute of Guizhou Power Grid Co. Ltd. Guiyang China State Key Lab of Control and Simulation of Power Systems and Generation Equipments (Dept. of Electrical Engineering Tsinghua University) Beijing China Binjiang College of Nanjing University of Information Science and Technology Wuxi China

Introduce the IoT platform technology based on SDN (Software Defined Network), cloud-based, flexible management and configuration of smart terminals, and support access to millions of terminal devices and smart operation and maintenance management. The traditional monitoring system is integrated with the Internet of Things platform, and on the basis of realizing the general SCADA system monitoring function, through the side-cloud collaboration, the lean management of the distribution station area is realized.

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