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2020 IEEE Sustainable power and Energy Conference, iSPEC 2020

作者： Liang, Feng Liang, Xudong Yang, Shanglin Pan, Hongxiang NARI Group Corporation State Key Laboratory of Smart Grid Protection and Control R&D Department in NARI Technology Nanjing211106 China NARI Group Corporation RandD Department in NARI Technology Nanjing211106 China

ISBN: (纸本)9781728191645

The substation has the features of a large quantity and wide-area distribution. With the promotion of unattended mode, it has become increasingly difficult to adapt to the needs of smart grid development using traditional field-based automatic equipment operation and maintenance(OM) method. Meanwhile, there is a shortage of professional and technical personnel, and the OM technology of a large number of intelligent heterogeneous secondary equipment is complicated and challenging to maintain. Therefore, it is urgent to solve the problems of OM efficiency, timeliness and technical complexity of a large number of substations. Based on the service-oriented idea, this article has designed the overall structure of the trinity of service management center, OM center and OM substation. This paper also proposes a GSP-based service standardization interaction mechanism. Through Safety management and control process of OM service, OM advanced applications are designed to achieves the automation equipment specification, safe and reliable remote operation and maintenance. © 2020 IEEE.

关键词： Maintenance

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Reliability Evaluation of a Regional Integrated Energy System Based on Complex Network Theory

Reliability Evaluation of a Regional Integrated Energy Syste...

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Sustainable power and Energy Conference (iSPEC)

作者： Jifeng Li Kuizheng Song Xingtang He Hao Luo Dalian Electric Power Supply Company State Grid Liaoning Electric Power Supply Co. Ltd Dalian China Dispatching and Control Center State Grid Liaoning Electric Power Supply Co. Ltd Shenyang China Key Laboratory of the Ministry of Education on Smart Power Grids Tianjin University Tianjin China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Northeast Electric Power University Jilin China

ISBN: (纸本)9781665414401

Most of the methods currently used to evaluate the reliability of integrated energy supply mainly consider such systems on a microgrid scale and focus on the effects of interactions among various energy carriers on the overall energy supply reliability of the system. As a result, it is difficult to analyze the system reliability in terms of its topology. Therefore, this paper proposes an approach for evaluating the reliability of a regional integrated energy system based on complex network theory. First, the feasibility of complex network theory application was analyzed based on the structural framework of the regional integrated energy system. Then, a weighted complex network model containing network characteristics was constructed by improving the “distance” parameter in the complex network theory. Employing this model enabled the proposal of reliability evaluation indices, including nodes and the entire system, from the perspective of the system network topology. Finally, the effectiveness and applicability of the developed method were verified by constructing a test system. The application of complex network theory for reliability evaluations of regional integrated energy systems described in this paper provides guidance for planning and constructing future systems at the level of topology reliability.

关键词： Couplings Complex networks Microgrids Energy conversion Reliability theory Propagation losses Topology

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Impact of Generation Companies’ Heterogeneous Investment Behaviors on the Effects of Non-fossil Energy Incentive Policies

Impact of Generation Companies’ Heterogeneous Investment Be...

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Sustainable power and Energy Conference (iSPEC)

作者： Bin Cai Tianran Li Kui Wang Zhiyuan Li Lei Zhu Jun Wen Yusheng Xue State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation/State Grid Electric Power Research Institute Nanjing China NARI School of Electrical and Automation Engineering Engineering Laboratory of Gas-Electricity Integrated Energy of Jiangsu Province Nanjing Normal University Nanjing China China Huaneng Group Co. Ltd Beijing China

ISBN: (纸本)9781665414401

The incentive policies for non-fossil energy are important factors affecting the investment behavior of generation companies (GENCOs). However, the investment behavior of different types of GENCOs in the system could be quite different, so the implementation of the policy must consider how to achieve incentive compatibility with the investment behavior of GENCOs. This article constructs a power transition simulation model that considers the investment behavior of GENCOs. Taking the wind power feed-in tariff policy as an example, it analyzes the impact of policy on the whole system’s low carbon transition pathway of the power structure and the evolution trajectory of system carbon emissions under different behavior scenarios.

关键词： Economics Analytical models Conferences Tariffs Carbon dioxide Companies Wind power generation

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Carbon-oriented Local Integrated Energy System Multi-energy Coupling Market Design

Carbon-oriented Local Integrated Energy System Multi-energy ...

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

作者： Jifeng Li Jinghua Li Xingtang He Hao Luo Dalian Electric Power Supply Company State Grid Liaoning Electric Power Supply Co. Ltd Dalian China Key Laboratory of the Ministry of Education on Smart Power Grids Tianjin University Tianjin China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Northeast Electric Power University Jilin China

ISBN: (纸本)9781665434263

Under the background that countries all over the world constantly advocate energy conservation and emission reduction and seek to deepen the reform of power systems and introduce new energy trading policies, this study constructed a carbon-oriented local integrated energy system multi-energy coupling market architecture. This construct was aimed at problems that current multi-energy coupling market research has not considered, including multi-energy substitution characteristics and carbon emission factors. First, taking the local integrated energy system as the main physical architecture, a multi-energy coupling market architecture was constructed combining the main market participants of different energy subsystems. Second, a model of the subsystem markets in the energy coupling market, and the joint clearing method were proposed. Finally, the guiding role of the energy coupling market was analyzed by simulation for reasonable pricing and carbon emission reductions of different energy market operators.

关键词： Couplings Analytical models Costs Uncertainty Energy conservation Carbon dioxide Pricing

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A Flame Detection Algorithm Based on Improved YOLOv3 and Thermograph Generation

A Flame Detection Algorithm Based on Improved YOLOv3 and The...

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Computing and Big Data (ICCBD), International Conference on

作者： Yong Zhang Jiaqing Zhang Jianhua Zhang Weijie Xing Xcmg Fire-fighting Safety Equipment Co. Ltd. Xuzhou China Anhui Province Key Laboratory of Electric Fire and Safety Protection State Grid Anhui Electric Power Research Institute Hefei China School of Information and Control Engineering China University of Mining and Technology Xuzhou China

Aiming at the low accuracy of flame detection in complex environment, a new flame detection method based on improved YOLOv3 and gray thermograph is proposed. For the insufficient thermograph of actual flame data sets, a temperature filling algorithm based on radial basis function is proposed. Based on the open data sets, the actual flame image and thermograph are added to build the initial flame data sets, which improves the model training efficiency and generalization performance. The obtained flame gray scale thermograph and R, G, B image are combined to form a four-channel data and input into the improved YOLOv3 network convolution network layer to obtain the multi-channel characteristics of the data. The experimental results on public and self-built data sets show that the algorithm combines gray thermal image to expand image data and improves the detection accuracy of flame recognition.

关键词： Training Thermal expansion Temperature distribution Image recognition Convolution Fires Feature extraction

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Influence of Marine Shewanella Putrefaciens and Mediated Calcium Deposition on Q235 Carbon Steel Corrosion

SSRN

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SSRN 2023年

作者： Lou, Yuntian Huang, Luyao Chang, Weiwei Chen, Xudong Hao, Xiangping Qian, Hongchang Zhang, Dawei Beijing Advanced Innovation Center for Materials Genome Engineering Institute for Advanced Materials and Technology University of Science and Technology Beijing Beijing100083 China National Materials Corrosion and Protection Data Center University of Science and Technology Beijing Beijing100083 China Shunde Innovation School University of Science and Technology Beijing Foshan528399 China State Key Laboratory of Advanced Power Transmission Technology State Grid Smart Grid Research Institute Co. Ltd. Beijing102209 China School of Materials Science and Hydrogen Energy Foshan University Foshan528000 China

Microbiologically influenced corrosion inhibition (MICI) of Q235 carbon steel by Shewanella putrefaciens and mediated calcium deposition was investigated via regulation of microbial mineralization. In calcium-rich medium, S. putrefaciens rapidly created a protective calcium carbonate layer on the steel surface, blocking Cl-diffusion. Without calcium, the biofilm and rust layer mitigated pitting corrosion but couldn't prevent Cl-penetration. The potentiodynamic polarization results indicated that the corrosion current density (icorr value) in the S. putrefaciens-inoculated media with and without calcium were 0.38 μA/cm2 and 0.61 μA/cm2, respectively. The corrosion inhibition rates compared to the sterile condition were 92.18% and 87.44%. Electrochemical Impedance Spectroscopy (EIS) and Scanning Electrochemical Microscopy (SECM) results confirmed MICI was due to microbial aerobic respiration and deposited layers. Even in non-biological conditions, S. putrefaciens-induced calcium carbonate deposition could inhibit corrosion © 2023, The Authors. All rights reserved.

关键词： Scanning electron microscopy

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Impact analysis of zero-sequence current rounding deviation on time-domain distance protection and its improved algorithm

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International Journal of Electrical power & Energy Systems 2025年 169卷

作者： Mingyu Shao Jiawei He Bin Li Bohao Zhou Yan Li Zhongrun Xie Runbin Cao The Key Laboratory of Smart Grid of Ministry of Education Tianjin University Tianjin 300072 China State Key Laboratory of Intelligent Power Distribution Equipment and System Tianjin University Tianjin 300072 China National Industry-Education Platform for Energy Storage Tianjin University Tianjin 300350 China Electric Power Research Institute of China Southern Power Grid Guangzhou 510663 China Power Dispatching and Control Center of Guizhou Power Grid Co. Ltd. 55000 China

The time-domain distance protection performs well under the influence of renewable energy generation characteristics, such as frequency offset and phase controlled character, thus having outstanding application prospects in systems with renewable power generation accessed. But, it is discovered that, the fast time-domain distance protection algorithm based on weighted accumulation might mal-operate during system normal operation. The essential reason of this issue is rounding deviation of the zero-sequence current in the protection device. Therefore, this study analyses the effect of rounding deviation in zero-sequence current on the fast time-domain distance protection. And the improved time-domain distance protection algorithm, based on the random correction of zero-sequence current, is proposed. The corresponding protection prototype is developed based on the proposed algorithm. By simulation and hardware-in-loop experiments, it is fully demonstrated that the proposed algorithm effectively mitigates the influence of rounding deviation. Furthermore, the accuracy of distance calculation during faults is not adversely affected.

关键词： Renewable energy Time-domain distance protection Rounding deviation Zero-sequence current Random correction

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Leakage Flux-Based Method to Identify the Inrush Current in Transformers

Leakage Flux-Based Method to Identify the Inrush Current in ...

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International Conference on Measuring Technology and Mechatronics Automation, ICMTMA

作者： Zheng Yu-Ping Zhang Zhen-Ya Wu Chong-Hao Pan Shu-Yan Zhou Li State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation(State Grid Electric Power Research Institute)NARI Technology Co. Ltd. Nanjing China

ISBN: (数字)9781728170817

ISBN: (纸本)9781728170824

Inrush current occurrence in the power transformers is an unavoidable event that can happen due to energizing no-load transformer. Although various protection methods based on the terminal current and/or voltage have been proposed for transformer protection, the protection malfunction caused by the inrush current still occurs occasionally. In this paper, By comparing different closing angles of transformers with normal condition and differences in leakage flux near the yoke, a simple and accurate method is presented to identify transformer inrush current conditions. The change of the flux density on the leakage flux sensor can effectively identify the transformer inrush current. This identification method has been initially verified in the simulation in Maxwell.

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Design and implementation of lightweight manmachine terminal screen interactive client 4

Design and implementation of lightweight manmachine terminal...

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4th IEEE Conference on Energy Internet and Energy System Integration, EI2 2020

作者： Lv, Zhimeng Que, Lingyan Fang, Caishen Wang, Xingzhi He, Yuan Huang, Kun NARI Group Corporation State Grid Electric Power Research Institute NARI Technology Co. Ltd. Nanjing China State Grid Zhejiang Electric Power Co. Ltd. No.8 of Huanglong Road Xihu District Hangzhou China East-China Branch of State Grid Co. Ltd. No. 201 Nanjing East Road Huangpu District Shanghai China NARI Group Corporation State Grid Electric Power Research Institute National Key Laboratory of Smart Grid Protection and Operation Control NARI Technology Co. Ltd. Nanjing China

ISBN: (纸本)9781728196060

According to the characteristics of the 'physical distribution and logical integration' of the new generation dispatching automation system, this paper designs a lightweight human-machine terminal display architecture. It also proposes the componentization of the screen and its rendering technology to realize the display of electrical primitives, chart primitives, and non-viewable primitives on lightweight man-machine terminals. Besides, this paper proposes the GIS visual display technology to meet the needs of geographic information display in the dispatch automation system and put forward the interaction technology of picture linkage to improve the interaction flexibility of picture components. Relevant research results have developed prototype system and applied in the field pilot. © 2020 IEEE.

关键词： Automation

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A security scheme for intelligent substation communications considering real-time performance

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Journal of Modern power Systems and Clean Energy 2019年第4期7卷 948-961页

作者： Jie ZHANG Jun’e LI Xiong CHEN Ming NI Ting WANG Jianbo LUO Key Laboratory of Aerospace Information Security and Trusted Computing Ministry of EducationSchool of Cyber Science and EngineeringWuhan UniversityWuhan 430072China NARI Group Corporation(State Grid Electric Power Research Institute) Nanjing 211106China NARI Technology Co.Ltd. Nanjing 211106China State Key Laboratory of Smart Grid Protection and Control Nanjing 211106China

Tampering,forgery and theft of the measurement and control messages in a smart grid could cause one breakdown in the power ***,no security measures are employed for communications in intelligent *** services in an intelligent substation have high demands for real-time performance,which must be considered when deploying security *** paper studies the security requirements of communication services in intelligent substations,analyzes the security capabilities and shortages of IEC 62351,and proposes a novel security scheme for intelligent substation *** security scheme covers internal and telecontrol communications,in which the real-time performance of each security measure is *** this scheme,certificateless public key cryptography(CLPKC)is used to avoid the latency of certificate exchange in certificate-based cryptosystem and the problem of key escrow in identity-based cryptosystem;the security measures of generic object-oriented substation event,sampled measure value and manufacturing message specification in IEC 62351 are improved to meet the real-time requirements of the messages as well as to provide new security features to resist repudiation and replay attacks;and the security at transport layer is modified to fit CLPKC,which implements mutual authentication by exchanging ***,a deployment of CLPKC in an intelligent substation is *** also evaluate the security properties of the scheme and analyze the end-to-end delays of secured services by combining theoretical calculation and simulation in this *** results indicate that the proposed scheme meets the requirements of security and real-time performance of communications in intelligent substations.

关键词： Intelligent substation Security measures Certificateless public key cryptography(CLPKC) Real-time communication IEC 62351

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