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检索条件"机构=State Key Laboratory ofSmart Grid Protection and Control"

共 400 条记录，以下是211-220 订阅

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NILT - Based Transient Traveling Wave Calculation Method for Lightning Stroke on Coupled Transmission Lines in DC Systems

NILT - Based Transient Traveling Wave Calculation Method for...

引用

IEEE International Conference on Power and Energy Systems (ICPES)

作者： Ziqiang Ouyang Zheng Yan Tonghua Wu Wei Dai Xindong Li Xiaofan Hou State Key Laboratory of Smart Grid Protection and Control (Nari Group Corporation) Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China State Key Laboratory of Smart Grid Protection and Control (Nari Group Corporation) Nanjing China

Overhead lines are the main way of power transmission in HVDC system. The fault traveling wave propagates along the line after lightning stroke, which may cause accidents. Fault identification and protection design rely on traveling wave analysis and calculation. The time domain solution of transmission line telegraph equations is complicated. Analysis in the complex frequency domain can reduce the computational difficulty. Firstly, this paper decouples the DC transmission line through phase-mode transformation and establishes the model. Then, the post-lightning boundary conditions are introduced and the calculation network is established. On this basis, it solves the expression of traveling wave based on nodal analysis method. Finally, with the numerical inverse Laplace transform, calculation results in complex frequency domain are converted into time domain. The proposed method can reflect the transient process after lightning stroke, which has engineering value for protection design.

关键词： Fault diagnosis Power transmission lines Frequency-domain analysis Simulation Lightning Voltage Transmission line theory

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Short-term operation planning of power grid flexibility regulation under uncertain risk scenario

Short-term operation planning of power grid flexibility regu...

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Sustainable Power and Energy Conference (iSPEC)

作者： Dongliang Xie Cai Wang Yusheng Xue Yening Lai Zheng Zhang Linjun Cai Xiaofang Song Huilin Zhang Chen Yu State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation (SGRPRI) Nanjing China

ISBN: (纸本)9781665414401

Traditional power grids for volatility, uncertainty, usually set a pro rata sufficient spare margin, but when the new energy grid capacity increases, if the volatility is so great, this "one size fits all" decision is often expensive, too high thermal power start-up and even result in waste of resources. Therefore, based on the study of the multi-scale flexibility control measures of source network load storage, this paper puts forward the operation planning algorithm to reduce the total operation control risk effectively by coordinating and lowering the backup measures. Synergy with the value of various flexible resources in short-term operation planning to prevent and control the risk of wind, light and power outages in power systems, to achieve flexible operation planning. Finally, through the study, the algorithm proposed in this paper is verified that the algorithm can solve the problem of risk prevention and control in operation planning more economically and safely under the condition of large-scale grid-connected new energy.

关键词： Costs Force measurement Uncertainty Prediction algorithms Regulation Power grids Planning

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Coupling Model and Cooperative Optimization Operation of Multi-energy Complementary Integrated Energy System 1

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8th Purple Mountain Forum on Smart grid protection and control, PMF 2023

作者： Yizhi, Chen Chenghong, Tang Dongmei, Yang Wenjie, Ye Wenjun, Xu Yuxiang, Meng State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China Nanjing211106 China NARI Technology Development Co. Ltd. Nanjing211106 China Nanjing Normal University Nanjing210023 China

ISBN: (数字)9789819992515

ISBN: (纸本)9789819992508

Driven by the goal of "carbon peak and carbon neutrality", a comprehensive energy system that integrates multiple energy structures has emerged. How to realize multi-energy complementarity and collaborative optimization among different sources, effectively improve energy utilization efficiency and promote the consumption of renewable energy has become a research hotspot. In this paper, the architecture of the user-side multi-energy complementary integrated energy system is studied, and the coupling equipment and energy supply network are analyzed. A multi-time scale coupling model, including a static coupling model and dynamic coupling model, is established for the multi-energy conversion equipment, Furthermore, the multi-energy coupling integration model is described. Then, a multi-energy coupling collaborative optimization method was proposed, and the objective function and constraint conditions of the system optimization operation were established. Finally, based on the coupling model and optimization method proposed in this paper, a multi-energy complementary comprehensive energy management and control system is developed. The system has been piloted and applied in several typical comprehensive energy scenarios across the country. Through data analysis and practical application verification, energy efficiency and the economy can be effectively improved. © 2024, state grid Electric Power.

关键词： Energy efficiency

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A Quick Generation Method for Power grid Graphs and Models in SCADA System

A Quick Generation Method for Power Grid Graphs and Models i...

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2018 2nd International Conference on Applied Mathematics, Modelling and Statistics Application (AMMSA 2018)

作者： Rongrong Cao NARI Technology Development Co. Ltd State Key Laboratory of Smart Grid Protection and Control

In the large power grid dispatching and control system, the unmanned substations bring a large amount of graph drawing and model input work to the automation maintenance personnel. The complicated work increases the error probability and hidden dangers, and it is difficult to adapt to the development of the large power grid. Therefore, it is very necessary to realize the quick generation method of power grid graphs and models in the large power grid dispatching and control system. This paper proposes a method for quick generation of graphs and models in SCADA system. This method is based on the design concept of object-oriented graph and model integration and realizes the quick generation of similar substations. This design has been used in real application widely and makes the maintenance of the automation system more conveniently, rapidly and accurately.

关键词： quick generation graph drawing model input graph and model integration

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B2DASH: Bandwidth and buffer-based dynamic adaptive streaming over HTTP 3rd

B2DASH: Bandwidth and buffer-based dynamic adaptive streamin...

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3rd International Conference on Machine Learning and Intelligent Communications, MLICOM 2018

作者： Du, Peihan Wang, Jian Wang, Xin Xu, Zufeng Nanjing University Nanjing China 61428 unit of the Chinese People’s Liberation Army Beijing China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation 19 ChengxinRoad Nanjingjiangsu211000 China

ISBN: (纸本)9783030005566

Currently, video streaming technology is widely used for entertainment, advertising, social networking and so on. Dynamic adaptive streaming over HTTP (DASH) has largely replaced the previous release of streaming video using UDP. Many researchers have proposed algorithms to improve DASH performance. There are two types of methods: bandwidth-based and buffer-based. Both methods have pros and cons. In this article, we propose a DASH algorithm that takes both bandwidth and buffer into account. And we imitate the method of network congestion control to adjust bitrate of the video segment. The algorithm was implemented and tested, and compared with the state-of-the-art DASH algorithm–BOLA. The results showed that B2DASH outperformed BOLA for both the average bitrate and buffer rise time. © ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2018.

关键词： Adaptive algorithms

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Best practices in China Southern Power grid competition of AI short-term load forecasting 12

Best practices in China Southern Power Grid competition of A...

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12th IEEE PES Asia-Pacific Power and Energy Engineering Conference, APPEEC 2020

作者： Lu, Jixiang Qian, Junxia Zhang, Qipei Liu, Shaobo Xie, Feng Xu, Hongsheng State Key Laboratory of Smart Power Grid Protection and Control Nanjing China Jiangsu Keneng Electric Power Engineering Consultant Co. Ltd Nanjing China Technology Research Center Nari Group Corporation Nanjing China

ISBN: (纸本)9781728157481

China Southern Power grid (CSG) hosted a competition of AI short-term load forecasting with real-world load data in Sept 2019. NARI Technology was invited for the 10 days closed match and got the 2nd prize among 28 top players in China, such as research institutes, universities, and system suppliers. This paper highlights the best practices we did in the competition: feature selection of short-term load forecasting, outlier data preprocessing for both load data and meteorological data, multiple head long short term memory (LSTM) neural network innovation and data augmentation with the benchmark. opportunities for improvements are considered as well. © 2020 IEEE.

关键词： Long short-term memory

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Research on Service-Oriented Substation Wide-Area Operation and Maintenance System and Its Application

Research on Service-Oriented Substation Wide-Area Operation ...

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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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Research on Mapping Method Between Smart Energy and Intelligent Sensing Terminal

Research on Mapping Method Between Smart Energy and Intellig...

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2022 IEEE International Conference on High Voltage Engineering and Applications, ICHVE 2022

作者： Liu, Siyang Mao, Yuxing Long, Yunfeng Pan, Jianyu Jiang, Tianyan Nie, Yongjie School of Electrical Engineering Chongqing University State Key Laboratory of Power Equipment & System Security and New Technology Chongqing China Electric Power Measurement Digitalization Control and Protection Yunnan Power Grid Co. Ltd. Yunnan Key Laboratory of Green Energy Yunnan Kunming China

ISBN: (数字)9781665407502

ISBN: (纸本)9781665407502

In the process of smart city construction, each city has its characteristics, so we should implement policies according to the city. Smart energy is an important cornerstone of smart city construction. This paper proposes a mapping method between smart energy and Intelligent Sensing Terminal. Firstly, a typical application scenario design of the smart city is proposed. Then, the smart city application scenario fitness calculation model is given combined with the analysis of macro and micro scenes. Finally, Intelligent Sensing Terminal and scene mapping mechanism are proposed by a new two-dimensional coding method. This method can quickly and effectively calculate the location to be arranged and the optimal number of devices, so as to reduce resource consumption and improve the quality of perceived data. © 2022 IEEE.

关键词： Smart city

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Ground Circulating Current Suppression of Flexible Interconnection System of Distribution Station Area based on Three-Phase Four-Leg Converter

Ground Circulating Current Suppression of Flexible Interconn...

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Power Energy Systems and Applications (ICoPESA), International Conference on

作者： Xiaoming Zeng Zhigang Wang State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation (State Grid Electric Power Reasearch Insitute) Nanjing China

Flexible interconnection of low-voltage distribution station area with power electronic device can realize dynamic capacity increase and coordination. When three-phase four-leg converter is used as a flexible interconnection device, there is no need to the isolation transformer, which can reduce the volume and cost of the system, but it will generate circulating current on the ground line. According to the main circuit topology of the system, the average circuit model of ground circulating current is established, and the influencing factors of ground circulating current are deduced. The low-frequency circulating current suppression strategy based on the average duty cycle control of the fourth leg and the high-frequency circulating current suppression method based on the DC side common mode inductor are proposed respectively for the low frequency and high frequency components of the ground circulating current. Finally, the simulation results show the effectiveness of the proposed average circuit model and the suppression method.

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Research on Coordination Strategy of Emergency and Correction control under High Proportion of New Energy Connected to Power grid

Research on Coordination Strategy of Emergency and Correctio...

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

作者： Fusuo Liu Hui Huang Haijun Chang Xuelian Wu Chao Wang State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation/State Grid Electric Power Research Institute Nanjin China

With the large-scale access of new energy sources, the operation mode and the uncertainty factors of the power grid increase, meanwhile the short-term power shock has an increasing impact, which exacerbates the complexity of the system frequency response characteristics and the difference in space-time distribution. Based on the analysis of principles and adaptability of emergency control and correction control, this paper comprehensively considers the operation mode and new energy access, and proposes a centralized control decision-making method based on model and trajectory driving from the perspective of global frequency control. The method also considers the continuously adjustable control resources and low voltage ride through of new energy. Finally, the practicality of the proposed method is verified based on the actual power grid simulation.

关键词： Low voltage Analytical models Adaptation models Uncertainty Decision making Power grids Trajectory

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