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检索条件"机构=tate Key Laboratory of Smart Grid Protection and Control"

共 367 条记录，以下是181-190 订阅

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Support System for Operation Status Awareness and Troubleshooting of UHVDC Transmission System

Support System for Operation Status Awareness and Troublesho...

引用

2018 International Conference on Advanced control, Automation and Artificial Intelligence (ACAAI2018)

作者： Jinjun Lu Xin Shan Yi Wang Xi Xu NARI Technology Co.Ltd. State Key Laboratory of Smart Grid Protection and Control

The transmission capacity of ultra-high voltage direct current(UHVDC) transmission system is huge. Once a fault occurs, it will bring tremendous impact on the operation of the power grid, bring about a number of problems such as power flow overload, insufficient reserve, and frequency drop, and induce chain failure. Therefore, it is necessary to adopt a comprehensive Precautions. This article describes the specific ideas and implementation methods of solving problems from the overall solutions to the handling of UHVDC faults, the risk assessment and prevention in advance, the real-time monitoring of events, and the assistance in emergency recovery *** method mentioned above has been operated in some regional and provincial power companies for demo purpose, and has played an important role in the handling of DC blocking events many times.

关键词： Ultra-high voltage direct current(UHVDC) Risk assessment Assistance decision Preventive control Real-time monitoring

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Non-intrusive monitoring and disaggregation of industrial load based on Petri net theory

Non-intrusive monitoring and disaggregation of industrial lo...

引用

第三届材料科学应用与能源材料国际研讨会

作者： Wei Zheng Jie Yu Hongjie Tian Peng Li Chenning Wu Mengfu Tu School of electrical engineering Southeast University State Key Laboratory of Smart Grid Protection and Control

In this paper, the non-intrusive monitoring and disaggregation method of industrial load based on Petri net theory is studied. First, the basic concepts of Petri nets are introduced. On the basis of prototype Petri nets, time factor is added. Then, the Petri net with time factor is combined with industrial load production process. Considering the production sequence, start-stop time and production time constraints of industrial load, a non-intrusive monitoring and disaggregation model of industrial load is constructed. Finally, according to the actual production process of industrial load, the electricity consumption situation of each production link is calculated, and the detailed analysis results of industrial user's electricity consumption behavior are obtained. The research could provide an important reference for realization of friendly interaction between industrial users and power grid.

关键词： Non-intrusive monitoring and disaggregation of industrial load based on Petri net theory Petri net

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A quantitative evaluation method for the performance of primary frequency regulation of system resources

A quantitative evaluation method for the performance of prim...

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7th International Conference on Electronics Technology, ICET 2024

作者： Xuelian, Wu Fusuo, Liu Hui, Huang Hongli, Zhang Wei, Li Nari Group Corporation State Grid Electric Power Research Institute Power Grid Analysis and Consulting Department Nanjing China Nari Group Corporation State Grid Electric Power Research Institute State Key Laboratory of Smart Grid Protection and control Nanjing China

ISBN: (纸本)9798350363951

With large scale new energy power being connected to the grid, the frequency support capability of the system decreases gradually. In order to meet the regulation requirements of system frequency stability and lay the foundation for frequency stability coordination and optimization control, it is necessary to use reasonable quantitative evaluation indicators for primary frequency regulation performance. Firstly, the dynamic response characteristics of frequency modulation resources in load fluctuation scenarios and large power disturbance scenarios are analyzed separately. Then, by mastering the frequency response characteristics of the system considering primary frequency regulation in different scenarios, the key factors affecting the safety and stability characteristics of the system frequency are determined. Finally, a quantitative evaluation method for the primary frequency regulation performance of frequency modulation resources is proposed, and the applicability of the proposed evaluation method is verified based on typical scenario examples. © 2024 IEEE.

关键词： Frequency stability

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Evaluation Methods for the Degree of Interaction and Coupling between New Energy and DC

Evaluation Methods for the Degree of Interaction and Couplin...

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7th International Conference on Electronics Technology, ICET 2024

作者： Xuelian, Wu Fusuo, Liu Zhaowei, Li Hongli, Zhang Yening, Lai Nari Group Corporation State grid electric power research institute Power Grid Analysis and Consulting Department Nanjing China Nari Group Corporation State grid electric power research institute State Key Laboratory of Smart Grid Protection and control Nanjing China

ISBN: (纸本)9798350363951

The high proportion of new energy connected to multi-infeed direct current power system may cause large-scale new energy to enter low voltage ride-through and multiple DC commutation failures under severe grounding faults, and the interactive coupling effect may affect the subsequent recovery process. In response to this phenomenon, interactive indicators are proposed to evaluate the risk of simultaneous faults between DC and new energy during grounding faults, as well as coupling indicators to evaluate the risk of secondary faults during the recovery process of DC and new energy after grounding faults are cleared. Simulation analysis based on actual power grids shows that this indicator can evaluate the interactive coupling process between new energy low voltage ride-through and DC commutation failure intuitively. © 2024 IEEE.

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Analysis of Emergency control Strategy of System Frequency under Large Power Disturbance 7

Analysis of Emergency Control Strategy of System Frequency u...

引用

7th Asia Conference on Power and Electrical Engineering, ACPEE 2022

作者： Guang, Xu Jiahe, Yang Xuelian, Wu Zhonghui, Wan Hui, Huang Fusuo, Liu Nari Group Corporation/State Grid Electric Power Research Institute State Key Laboratory of Smart Grid Protection and Control Nanjing China Nari Group Corporation/State Grid Electric Power Research Institute Power Grid Analysis and Consulting Department Nanjing China State Grid Electric Power Research Institute Nanjing China

ISBN: (纸本)9781665418195

When large-power disturbances occur in power grids, the system frequency will shift greatly, and there may be obvious spatial-temporal distribution characteristics. By analyzing the single-machine frequency response characteristics of the system and the frequency difference between the two systems, a system frequency analysis model considering nonlinear factors under large frequency difference is proposed to estimate the maximum offset of the system frequency. It is proposed to reduce the maximum frequency offset and reduce the frequency spatiotemporal distribution characteristics by selecting the coordination method of emergency control at different locations at different times, thus improving the safety and stability of the power grid. © 2022 IEEE.

关键词： Electric power transmission networks

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Model Predictive control Based Active Frequency Support Strategy for Combined Wind/Photovoltaic/Storage Power Station 6

Model Predictive Control Based Active Frequency Support Stra...

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6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Wang, Manliang Gao, Bingtuan Jiang, Yingwei Tian, Yunfeng Dong, Wenqi Shi, Xuewei School of Electrical Engineering Southeast University Nanjing China Nari Group Corporation State Key Laboratory of Smart Grid Protection and Control Nanjing China State Grid Hebei Zhangjiakou Scenery Storage and Transmission New Energy Co. Ltd Zhangjiakou China

ISBN: (纸本)9798350346671

The high penetration of renewable energy sources connected to the grid has brought great challenges to the frequency stability of the power system. For the combined wind/pohotovoltaic/storage power station, it is of great significance for better frequency performance to realize the coordination control of active power. Therefore, this paper presents a frequency active support strategy for combined wind/pohotovoltaic/storage power station. By establishing the model of combined wind/pohotovoltaic/storage power station, this strategy applies model predictive control (MPC) to optimize the total active power reference value and the allocation of response power of the combined wind/pohotovoltaic/storage power station. For obtaining better frequency performance, this strategy aims at absorbing wind and solar energy resources and improving the economy of energy storage station. In order to verify the performance of the proposed strategy, it is compared with droop control using MATLAB/Simulink when the load increasing and decreasing respectively. The simulation results clearly show the effectiveness of the active frequency support strategy proposed in this paper. © 2023 IEEE.

关键词： Model predictive control

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Research on Inter-station 2M Communication protection Method Suitable for Stability control System 16th

Research on Inter-station 2M Communication Protection Method...

引用

16th Annual Conference of China Electrotechnical Society, ACCES 2021

作者： Feng, Ke Chen, Xiong Wang, Wang Zhu, Kaiyang Lu, Yan Cai, Yupeng NARI Group Corporation/State Grid Electric Power Research Institute Nanjing210003 China Electric Power Research Institute of State Grid Liaoning Electric Power Co. Ltd Shenyang110004 China State Key Laboratory of Smart Grid Protection and Control Nanjing210003 China

ISBN: (纸本)9789811915314

The communication safety of the safety and stability control system has received more and more attention. This paper analyzes the risks and consequences of the inter-station communication in detail. Based on the special structure of the inter-station communication, a security and stability control system inter-station communication protection method is proposed. This method builds a complete communication management scheme by adding function codes, counting bits and check codes in the message, thereby realizing effective identification and protection of risk points such as communication interruption, information tampering, and playback attacks. The effectiveness and reliability of the method has been proved by the results of experiments. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Cryptography

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Instantaneous Frequency Measurement and Tracking under Out of Step Oscillation 7

Instantaneous Frequency Measurement and Tracking under Out o...

引用

7th International Conference on smart grid and smart Cities, ICSGSC 2023

作者： Cai, Ke Su Zhang, Gan Feng Ji, Rong Rong Zheng, Sui Sheng Xia, Cheng Lin Lan, Tian Yu State Grid Electric Power Research Institute State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation NanJing China Ultra High Voltage Branch Company State Grid Zhejiang Powe Company HangZhou China Nari Group Corporation State Grid Eelectric Power Research Institute NanJing China

ISBN: (纸本)9798350305913

As an important operating parameter of the power system, the instantaneous frequency of the current can reflect the actual operating state of the current system, especially when the system is out of step. The characteristics of the current in the oscillation line are analyzed in this paper. An algorithm for measuring instantaneous frequency of current while power system swings is presented, based on the broad definition of angular frequency. According to the feature of the actual power system, a new method for measuring the instantaneous current frequency by real-time sampling is proposed. Finally, the algorithm is simulated on the model of the equivalent systems. When the system swings, the real-time frequency is gained by sampling the current in the line, combined with the frequency of the equivalent machine of both sides. It shows that the obtained current frequency is reasonable and effective, compared to the characteristics of the system. © 2023 IEEE.

关键词： angular frequency instantaneous frequency oscillation sampling

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Design of real-time message synchronization cross smart grid dispatching system 4

Design of real-time message synchronization cross smart grid...

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

作者： Xu, Chunlei Liu, Tong Lei, Baolong Peng, Hui State Grid Jiangsu Electric Power Co. Ltd. Nanjing China NARI Technology Co. Ltd. Xi'an China NARI Technology Co. Ltd. State Key Laboratory of Smart Grid Protection and Control Nanjing China

ISBN: (纸本)9781728196060

In the integrated operation mode of the smart grid dispatching and control system, there is a large amount of real-time data such as important alarms and manual operations that need to be shared between systems. How to synchronize these real-time data across systems with high reliability and performance becomes a problem to be solved. This paper studies the application scenarios of cross-system message synchronization and proposes a scheme based on redundant dual networks, including hardware and software architecture. The key technologies and important functions were implemented, reliability and throughput verifications were performed, and the expected results were achieved. © 2020 IEEE.

关键词： smart power grids

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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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