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New Energy and power Engineering (ICNEPE), International Conference on

作者： Hongjun Wen Bowei Chen Zuxin Li Jiqiao Chen Zhi Nie Qian Wu Power Grid Development Department State Grid Zhejiang Electric Power Co. Ltd. Lishui Company Lishui China R&D Center T&D Power Research (Beijing) Technology Co. Ltd Beijing China

At present, reliability calculation is mostly focused on the calculation of current years, and the calculation of planned years is often carried out using fuzzy estimation. The calculation methods are complex and diverse, which is not conducive to the modular implementation of software. This article deeply analyzes the essence of reliability calculation based on the topology simplification model of power flow, and summarizes the parts related to the grid structure in its classic calculation formula as the grid coefficient. The parts related to the equipment are collected as the equipment coefficient, and the calculation is simplified based on practical applications. Then, based on the power grid resource business center and data center, a centralized (microservices/micro applications) + collaborative computing framework construction model is adopted, integrating basic data such as reliability facility ledger, topology, and graph model, and obtaining important parameters such as fault rate and average recovery time of distribution grid equipment components. Based on simplified calculation formulas, a power supply reliability online calculation micro application module is developed, The calculation results can provide convenient data support for reliability management and decision-making of distribution grids. This article also provides the specific implementation of software architecture design and interface display effects.

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design and Application of Image recognition Framework Based on Cloud Edge Collaboration in distribution Stations

Design and Application of Image Recognition Framework Based ...

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IEEE International Conference on power, intelligent Computing and Systems (ICPICS)

作者： Wenwei Wu Lishou Zhang Kai Kang Juntao Liu Construction and Operation Center State Grid Shanghai Municipal Electric Power Company Shanghai China R&D Department Shanghai Yitong Information Technology Co. Ltd Shanghai China

Targeted on the intelligent identification and cloud load reduction requirements of power system in video monitoring, a vision analysis system platform and implementation scheme for distribution station based on cloud edge system are proposed. Through multi-source data fusion analysis, optimization of defect fault location, image recognition algorithm, cloud edge threshold classification collaboration, image processing and feature extraction technologies such as YOLOv3, Mask-CrNN, etc., the high-definition real-time image is analyzed, and the main equipment status recognition and security abnormal behavior recognition functions of the distribution station are realized. The real-time and accuracy of each analysis function is verified by the on-site distribution station, and the relevant experimental results of some functions in the power grid are compared to show the effectiveness of the system scheme.

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Study on the Synergistic Operation of Pumped Storage and Electrochemical Energy Storage under High Percentage New Energy power System

Study on the Synergistic Operation of Pumped Storage and Ele...

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IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Gao Guiliang ren Juan Yu Guokang Xin Chaoshan Zhang Shuhua Yao Peng Ye Mengni Cong Biao Center for Normative Development Research Economic and Technical Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Urumqi China Technical and Economic Center Economic and Technical Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Urumqi China Design Center Economic and Technical Research Institute of State Grid Xinjiang Electric Power Co. Ltd. Urumqi China School of Electrical and Electronic Engineering North China Electric Power University Beijing China R&D Center - Intelligent Power Distribution and Utilization Technology Department NARI Technology Co. Ltd. Nanjing China

ISBN: (数字)9798331523527

ISBN: (纸本)9798331523534

The amount of renewable energy included into the power system has increased significantly in light of the "dual-carbon" targets, and the inherent stochasticity and intermittency of renewable energy outputs have posed significant issues pertaining to power system stability and security. This necessitates the integration and coordination of various energy storage technologies to enhance the system’s flexibility in scheduling and regulation. This paper presents a day-ahead and intra-day rolling optimal dispatch strategy that incorporates the coordinated participation of pumped storage and electrochemical energy storage. It quantitatively evaluates the system support capabilities and economic benefits of their coordinated operation across four key dimensions: smoothing renewable energy output fluctuations, promoting renewable energy absorption, improving generation reliability, and reducing the burden of system peak shaving. Utilizing data from the Xinjiang provincial power grid, a case study is carried out to evaluate the support capacities of various energy storage coordination solutions within each dimension, confirming the benefits and efficacy of the suggested methodology.

关键词： Economics renewable energy sources Technological innovation Fluctuations Optimization models power system stability power grids power system reliability Systems support Energy storage

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research on the Security Verification and Evaluation System of distribution Network dispatching Instructions in Telephone Mode

Research on the Security Verification and Evaluation System ...

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Energy, power and Electrical Engineering (EPEE), International Conference on

作者： Chaoyue Zhu di Huang Hongwei Liu Panxia Chen Shaojie Luo Weiyan Zheng R&D Department Hangzhou Science and Technology Development Branch Zhejiang Dayou Industrial Co. Ltd. Hangzhou China Business Service Center State Grid Hangzhou Power Supply Company Hangzhou China

Nowadays, the issue of command security in the distribution network dispatching telephone command mode is becoming increasingly prominent, and relevant personnel are paying more and more attention to the information security and accuracy when transmitting dispatching instructions to the distribution network, to prevent risks such as tampering, forgery, and theft of dispatching instruction information. The article first briefly analyzes the problems that exist in the telephone command mode during scheduling; Secondly, in response to the data security issues related to the issuance of instructions in the distribution network, based on cloud storage technology, the S-box is improved in the group encryption algorithm AES, and a chaotic system is introduced for data sequence encryption. The improved AES algorithm is combined with the chaotic system to achieve confidentiality of both parties' codes and information transmission; Simultaneously introducing upper entropy, using entropy to randomly verify the completeness and accuracy of numbers or information; Finally, the effectiveness of this method was theoretically proven, achieving efficient communication of scheduling information and ensuring the confidentiality and accuracy of received scheduling instructions.

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distributed Energy resource Benchmark Models for distribution Impact Assessment - Update of Activities by CIGrE Working Group C6.36 26

Distributed Energy Resource Benchmark Models for Distributio...

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26th International Conference and Exhibition on Electricity distribution, CIrEd 2021

作者： Peppanen, Jouni Taylor, Jason Fonseca, daniel Snodgrass, Joshua Chen, Shengen Strasser, Thomas I. Distribution Operations & Planning Electric Power Research Institute KnoxvilleTN United States R&D Department Sinapsis - Inovação em Energia São Paulo Brazil Distribution Services POWER Engineers Inc. DenverCO United States Power System Studies RLC Engineering PLLC FalmouthME United States Center for Energy AIT Austrian Institute of Technology Vienna Austria

ISBN: (纸本)9781839535918

With growing levels of distributed energy resources (dEr), effective assessment and design of active distribution systems increasingly depend upon access to models that accurately represent the various dEr and their controls. However, as dEr technologies continue to rapidly evolve, along with the analysis needed to capture their impacts on the system, there is an increasing need for benchmark models that can serve as a common reference by distribution engineers, vendors, academia, and other industry stakeholders. This paper provides an update on the work by CIGrE Working Group C6.36: "distributed Energy resource Models for Impact Assessment" to identify a set of benchmark dEr models for quasi-static time-series load flow (QSTS) simulations, increasingly used to evaluate active distribution system impacts and performance. These benchmark models can be used by the industry to understand and verify the performance of existing models as well as serve as a reference for further modifications and enhancements. This paper discusses the working group's proposed dEr benchmark model framework, which specifies the dEr benchmark model hierarchy and requirements. Additionally, initial efforts in developing benchmark models for PV systems, energy storage systems, and smart inverters are presented along with the lessons learned and future work. © 2021 The Institution of Engineering and technology.

关键词： Time series

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Corrosion resistance and conductivity behavior of Cr-Al-N MAX phase coatings prepared by magnetron sputtering technology

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Thin Solid Films 2024年 793卷

作者： Su, Y.L. Kao, W.H. Horng, J.H. Hsueh, H.C. Cian, Y.C. Hsieh, T.C. Department of Mechanical Engineering National Cheng Kung University Tainan701 Taiwan Department of Automation Engineering & Institute of Mechatronoptic Systems Chienkuo Technology University Changhua500 Taiwan Department of Power Mechanical Engineering National Formosa University Yunlin633 Taiwan Smart Machine and Intelligent Manufacturing Research Center National Formosa University Yunlin633 Taiwan Micro/Meso Mechanical Manufacturing R&D Department Surface Engineering & Heat Treatment Section Metal Industries Research and Development Centre Kaohsiung811 Taiwan

Chromium aluminum nitride (CrAlN) coatings containing Cr2AlN phase were prepared by unbalanced magnetron sputtering followed by annealing at 1000 °C. The crystal structures, X-ray diffraction patterns, and selected area electron diffraction patterns of the Cr2AlN phase were modeled using computer software and compared with experimental observations. A good agreement was found between the two sets of results, thereby confirming the presence of Cr2AlN phase in the coatings. While previous studies have demonstrated the formation of Cr2AlN phase theoretically, this study presents experimental evidence of its physical existence. The potentiodynamic polarization results and interfacial contact resistance measurements show that the CrAlN coating with Cr2AlN phase has excellent corrosion resistance (a corrosion current density of 5.35 × 10−7 A/cm2 and electrical conductivity of 5.5 mΩ·cm2) and is thus a promising candidate for the protection of fuel cell bipolar plates. © 2024 Elsevier B.V.

关键词： Chromium compounds

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research on Optimization Operation Strategy of distributed power Supply in distribution Network Based on Adaptive Particle Swarm Algorithm

Research on Optimization Operation Strategy of Distributed P...

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Science and technology Innovation (IAECST), International Academic Exchange Conference on

作者： Jian Li Ke Zhang Zetao Jiang Yuxin Lu Yu Zhao Metrology Center Guangdong Power Grid Co. Ltd New Energy Application R&D Technology Park Shijiao Town Qingcheng District Qingyuan City Guangdong Province Guangdong Provincial Key Laboratory of Intelligent Measurement and Advanced Metering of Power Grid No. 11 Kexiang Road Huangpu District CSG Electric Power Research Institute Guangzhou City Guangdong Province

Since the "carbon peak, carbon neutral" dual-carbon goals put forward, new energy in the future power system in the main position to be clear, the country also further promote the implementation of renewable energy substitution action and "clean, low-carbon, safe and efficient" energy system construction, build a new power system with new energy as the main body. New energy as the main body of the new power system. In this context, the energy saving and loss reduction of distribution network is also getting more and more attention. This paper analyzes the current situation of line loss of distribution network with distributed power supply access, fully summarizes the research dynamics and achievements of distributed power grid connection related issues at home and abroad, especially conducts an in-depth study on the impact mechanism of distributed power supply access to medium and low-voltage distribution network on line loss, and organizes the key factors of the impact of distributed power supply access to line loss of distribution network. By analyzing the impact of distributed power grid integration on distribution network line loss, a distributed power optimization model with the objective function of minimizing network loss and maximizing distributed power consumption is proposed, and the multi-objective optimal configuration model of distributed power is solved based on the adaptive particle swarm (AFIPSO) algorithm to validate the effectiveness of the proposed strategy by taking the IEEE-33 node distribution system as an example.

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The development of high performance in hybrid sic power integrated module (Pim)

The development of high performance in hybrid sic power inte...

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International Exhibition and Conference for power Electronics, intelligent Motion, renewable Energy and Energy Management, PCIM Europe 2020

作者： Chang, J.Y. Fun, S.Y. Wu, S.T. Leu, F.J. Lo, Y.Y. Chiu, P.K. Yu, T.J. Wu, H.L. Han, W.K. Tzeng, C.M. Hsu, S.F. Kao, K.S. Lin, H.H. Chang, T.C. Yamauchi, S. Anai, K. Jo, J.L. Sakaue, T. Intelligent Power Module & System Department Electronics and Optoelectronics system Research Laboratories Industrial Technology Research Institute Taiwan Engineered Materials Sector R&D Center Mitsui Mining & Smelting Co. Ltd Japan

ISBN: (纸本)9783800752454

due to wide bandgap electronic with high-speed exchange rate can efficiently improve the dynamic characteristics of the machine tool system. The high thermal conductivity of SiC can be applied to more than 10 kW of high power systems, which made it highly efficient, high temperature resistant and reliability. In this study, 1200V/100A hybrid SiC power integrated module (PIM) was designed and manufactured in ITrI. Through the thermal, electrical and stress simulation, the power module was designed to meet the function improvement and reliability. This study accomplished the different height of multi-chip simultaneous Cu sintering. © VdE VErLAG GMBH · Berlin · Offenbach.

关键词： Silicon carbide

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Plastic Shavings by Laser: Peeling Porous Graphene Springs for Multifunctional All-Carbon Applications

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Advanced Science 2023年第21期10卷 e2301208页

作者： Kim, Chanwoo Hwang, Eunseung Kwon, Jinhyeong Jang, Tae Hwan Lee, Won Chul Kim, Shi Hyeong Park, Jongmin Lee, Ming-Tsang Kim, Hyun Hong, Sukjoon Lee, Habeom School of Mechanical Engineering Pusan National University Busan46241 Korea Republic of Optical Nanoprocessing Lab Department of Mechanical Engineering BK21 FOUR ERICA ACE Center Hanyang University Gyeonggi-do Ansan15588 Korea Republic of Intelligent Manufacturing System R&D Department Korea Institute of Industrial Technology Chungcheongnam-do Cheonan31056 Korea Republic of Division of Electrical Engineering Hanyang University ERICA Gyeonggi-do Ansan15588 Korea Republic of Department of Mechanical Engineering BK21 FOUR ERICA ACE Center Hanyang University Gyeonggi-do Ansan15588 Korea Republic of Department of Advanced Textile R&D Korea Institute of Industrial Technology Gyeonggi-do Ansan15588 Korea Republic of HYU-KITECH Joint Department Hanyang University Seoul04763 Korea Republic of Advanced Materials Division Korea Research Institute of Chemical Technology Daejeon34114 Korea Republic of Department of Power Mechanical Engineering National Tsing Hua University Hsinchu30013 Taiwan

Manufacturing strategies to create three-dimensional (3d) structures with multifunctional nanomaterials are of intense interest for fabricating building blocks in many electromechanical applications. A coil spring composed of graphene provides an important step toward the realization of all-carbon devices, as it is one of the essential elements for a wide range of systems. In this connection, here an unprecedented fabrication strategy to create a new type of 3d coil spring composed of laser-induced graphene springs (LIG-S) which is spontaneously produced via the pyrolytic jetting technique, is presented. Similar to wood or metal shavings observed in traditional machining processes, a pair of LIG-S with two opposite chiralities and controllable macroscopic dimensions is produced by a single scanning of a focused continuous-wave (CW) laser on a polyimide (PI) substrate. The resulting LIG-S, plastic shavings by laser, exhibits sufficient mechanical and electrical properties to enable many applications including strain-tolerant spring electrodes, antennas, supercapacitors, gas sensors, and luminescent filaments under extreme conditions. Without using any conventional fabrication techniques or other labor-intensive, time-consuming, and expensive processes, this novel approach enables a high-throughput mass production of macro-, micro-, and nanoscale featured LIG-S that can be manufactured within seconds to realize many open opportunities in all-carbon electromechanical systems. © 2023 The Authors. Advanced Science published by Wiley-VCH GmbH.

关键词： Fabrication

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Optimized functional design and simulation study of the fault line selection devices for non-solidly earthed network based on rTdS 9

Optimized functional design and simulation study of the faul...

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9th China International Conference on Electricity distribution, CICEd 2021

作者： Haiqing, Cai Qi, Guo Zhida, Huang Shiping, Liu Wencong, Wu Jiang, Yu Libin, Huang Zebing, Shi Shuyong, Li Electric Power Research Institute China Southern Power Grid State Key Laboratory of HVDC China National Energy Power Grid Technology R&D Centre Guangzhou510663 China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou510663 China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou510663 China Electric Power Research Institute of State Grid Jiangxi Electric Power Company Nanchang330096 China CSG Power Dispatch Control Center Guangzhou510663 China

ISBN: (纸本)9781728192291

The action accuracy of the fault line selection device is of great significance for ensuring the safe operation of the power system and personal safety. In view of the current imperfect function and the low accuracy of the small current grounding line selection device, the function of line selection of the device is further optimally designed and studied, and the post-acceleration and wheel-cutting functions are put forward and realized. The rTdS simulation model of non-solidly earthed network is established and connected with the actual grounding line selection device to form a closed-loop real-time simulation testing system. By setting up various test items, different types of ground fault test of non-solidly earthed net-work are carried out. The results of simulation show the accuracy of the line selection function, which provides important technical guidance for the implementation of the fault line selection device. © 2021 IEEE.

关键词： Electric grounding

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