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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161-170 订阅

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Construction of Dynamic Knowledge Graph for grid day-ahead Scheduling Optimization Decision 10

Construction of Dynamic Knowledge Graph for Grid day-ahead S...

引用

10th IEEE Joint International Information Technology and Artificial Intelligence Conference, ITAIC 2022

作者： Yan, Qing Ding, Maosheng Lu, Jixiang Lu, Jinjun Yang, Huibiao Xie, Feng Nanjing China Nari Technology Co. Ltd. Nanjing China State Key Laboratory of Smart Grid Protection and Control Nanjing China State Grid Ningxia Electric Power Co. Ltd. Ningxia China

ISBN: (数字)9781665422079

ISBN: (纸本)9781665422079

As a new generation technology representative of knowledge engineering, knowledge graph is a large-scale semantic network, which has natural advantages in extracting knowledge from multi-source heterogeneous information, complex and highly correlated knowledge representation and reasoning. Based on the analysis of the application status of the grid day-ahead scheduling optimization decision-making technology and the demand for improving the intelligent processing capability, the key technologies and methods for the application of knowledge graph in the grid day-ahead scheduling optimization decision-making are proposed. The key technologies, application ideas and process methods of knowledge graphs are analyzed from the aspects of the design of knowledge ontology framework in the field of day-to-day dispatching of power grids, high-quality phrase mining and entity recognition, relation extraction and knowledge fusion, and scene-based dynamic knowledge graph update. Finally, the application and challenges of knowledge graph in the field of grid day-ahead scheduling in the future are summarized and prospected. © 2022 IEEE.

关键词： Knowledge graph

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Tracking Status for Hardware-in-the-Loop Simulation Using RTDS

Tracking Status for Hardware-in-the-Loop Simulation Using RT...

引用

2021 IEEE Sustainable Power and Energy Conference, iSPEC 2021

作者： Liu, Qitao Hou, Yuqiang Xu, Jianbing Liu, Yongkang Nari Technology Co. Ltd Nanjing211106 China Nari Group Corporation State Grid Electric Power Research Institute Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China

ISBN: (纸本)9781665414395

The power system becomes more complex, due to the high penetration of renewable energy and more electronic devices are integrated to the traditional grid. SSCS is the critical task for power grid operation to ensure the control reliability and effectivity. It is inevitable to improve verification experiment technology for SSCS considering the development trend of the power system. RTDS is a powerful simulator for power system which is able to reflects the practical power system operation in real time. In this paper, a method for status tracking of power system model in RTDS is developed that SSCS is able to be verified under multiple operation conditions. It is found that the status cannot be tracked consistently as given, due to the limitations of RTDS models and raw data. The limitation in tracking reactive power output of generators is overcame in this paper. Besides, the development trend of online stability analysis and control is discussed as well as SSCS verification experiment technology. © 2021 IEEE.

关键词： Hardware-in-the-loop simulation

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Reliability analysis of autonomous controllable protection device in power system 8

Reliability analysis of autonomous controllable protection d...

引用

8th International Conference on Power Electronics Systems and Applications, PESA 2020

作者： Li, Chen. Yutao, Qiu. Jianing, Chen. Xuliang, Huang. State Key Laboratory of Smart Grid Protection and Control China Co. Ltd Nanjing China State Grid Zhe Jiang Electric Power Co .LTD. China State Grid Zhejiang Electric Power Company Hangzhou Power Supply Company China

ISBN: (纸本)9781728193823

With the deepening of the concept of autonomous control in the power system, more and more attention is paid to the stability of the protection device itself. Compared with the primary equipment condition monitoring, the fault of the secondary protection device will be more concealed. This paper analyzes the factors affecting the reliability of protection devices, forms the life cycle prediction method of substation protection devices, and ensures the safe and stable operation of intelligent substation. Analyzed the reliability of the relay protection device related concepts, from the failure mechanism, through the establishment of joint aging failure based on the Arrhenius model and Weibull distribution model, and based on grid relay protection device, the data is using LM method for joint failure rate estimate the parameters of the model, get old equipment failure rate model of concrete, to determine the reliability of the protection device and the effective service life. An example shows that the model proposed in this paper can effectively predict the failure trend and life boundary of the device, and provide a theoretical basis for the daily maintenance of smart substation. © 2020 IEEE.

关键词： Weibull distribution

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Approach for Studying the Impact of Communication Failures on Power grid

Approach for Studying the Impact of Communication Failures o...

引用

IEEE Power and Energy Society General Meeting

作者： Yusheng Xue Ming Ni Wenjie Yu NARI Technology Inc. and State Key Laboratory of Smart Grid Protection and Control

ISBN: (纸本)9781509041695

In smart grid, a strong communication network plays a very important role, which makes the power grid more controllable and observable. It is a very tough task to study the mutual impact between these two systems due to their different characteristics. This paper proposes a generic and systematic approach for quantitatively studying the impact of communication failures on power grid's measurement and control functions. And an example is used to illustrate how to apply the approach in studying the impact of communication failure on a stability control system.

关键词： Communication failure Communication interruption Power system control Stability control system control system stability Power grids Power system control control function Communication Research networks(communications)

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Reliability Evaluation of Electronic Cabin Smoke Detector Based on FMEA and Arrhenius Mode 12

Reliability Evaluation of Electronic Cabin Smoke Detector Ba...

引用

12th IEEE Global Reliability and Prognostics and Health Management, PHM-Nanjing 2021

作者： Sul, Yan Liang, Xuerui Wen, Tan Civil Aviation College Nanjing University Of Aeronautics And Astronautics China State Key Laboratory Of Smart Grid Protection And Control Nanjing China Civil Aviation College Nanjing University Of Aeronautics And Astronautics Nanjing China

ISBN: (纸本)9781665401302

The high reliability of smoke detectors in the electronic cabin of passenger aircraft is of great significance for reducing the false alarm rate of smoke detection and ensuring the safety of passenger aircraft and passengers. In order to analyze and evaluate the reliability of newly developed smoke detectors, a set of reliability evaluation methods for electronic cabin smoke detectors based on FMEA (failure mode and impact analysis) and Arrhenius models are presented. First of all, based on the principle of the system, the FMEA method is used to analyze and determine the potential failure location, potential failure mode and failure reason of the smoke detector. Then, the RPN (Risk Coefficient) evaluation method based on the expert scoring method determines the priority ranking of failure risks, establishes risk evaluation indicators, conducts risk evaluation on failure modes, and determines high-risk stresses. Finally, for the high-risk stress, a life prediction of the smoke detector in the electronic cabin based on the Arrhenius model is established. The feasibility and effectiveness of the above reliability evaluation method are verified and analyzed by taking a smoke detector in the electronic cabin of a certain type of passenger aircraft as an example. © 2021 IEEE.

关键词： Risk assessment

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The Analysis of AC Faults in AC/DC Hybrid Distribution System with SOP 1

引用

7th Purple Mountain Forum on smart grid protection and control, PMF2022

作者： Jin, Peng Wu, Tonghua Wu, Hai Hu, Guo Shen, Qian NARI Group Co. Ltd. State Key Laboratory of Smart Grid Protection and Operation Control Nanjing211000 China School of Automation Nanjing University of Science and Technology Nanjing210094 China

ISBN: (数字)9789819900633

ISBN: (纸本)9789819900626

AC/DC hybrid distribution system becomes increasingly necessary for integration of distributed renewable energy resources (DER) and management of carbon emissions. However, the fault characteristics of AC/DC hybrid power distribution network are vastly different from traditional AC distribution system for their varied structures. Considering the strong capability in controlling power flow and fault current of soft open point (SOP), this paper establishes the model of AC fault sequence network of hybrid distribution system with SOP, in which positive and negative separation control strategy is adopted by the converter. The model includes traditional AC equivalent network, DC equivalent network, back-to-back converter and its control system, based on which the AC fault characteristics in AC/DC hybrid distribution system are analyzed. Through utilizing PSCAD/EMTDC, different simulation scenarios are carried out to verify the effectiveness of AC fault modeling and analysis method of AC/DC hybrid power distribution system with SOP, thus providing a theoretical basis for AC side protection scheme of AC/DC hybrid system. © State grid Electric Power Research Institute 2023.

关键词： Electric load flow

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Transient Stability Analysis of Paralleled grid-Forming Converters 3

Transient Stability Analysis of Paralleled Grid-Forming Conv...

引用

3rd International Conference on Energy, Power and Electrical Engineering, EPEE 2023

作者： Yang, Kexin Bao, Yanhong Wu, Feng Ren, Xiancheng Zhang, Jinlong Nanjing Normal University Nari Technology Co. Ltd. Nanjing China Nari Technology Co. Ltd. State Key Laboratory of Smart Grid Protection and Control Nanjing China

ISBN: (纸本)9798350318180

Interaction exists in multiple grid-forming converter parallel systems, resulting in different transient stability issues between multiple converter systems and single converter under large disturbances. During the current limiting period, the external characteristics of the grid-forming converter become current source, which causes three different external characteristic models of parallel converter. In this study, three models of parallel system were established, and the effect of different coupling power directions was analyzed based on the power angle curve. Further, the influence of different parameters of converter was discussed and three different cases of converter transient stability due to interaction was revealed. The interaction between converters is mainly determined by the coupling power direction. When the external characteristics of the converters are the same, the coupling power direction is mainly determined by the power angle. When the external characteristics are different, the coupling power direction is determined by the current limiting strategy. The correctness of the theoretical analysis was verified based on the PSCAD platform. © 2023 IEEE.

关键词： current limiting equal area criterion grid-forming converter paralleled system transient stability

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Influence Analysis of control Parameters on Transient Stability of Single-loop Voltage-Magnitude controlled grid-Forming Converter 6

Influence Analysis of Control Parameters on Transient Stabil...

引用

6th Asia Conference on Energy and Electrical Engineering, ACEEE 2023

作者： Yang, Kexin Bao, Yanhong Ren, Xiancheng Wu, Feng Zhang, Jinlong Nanjing Normal University NARI Technology Co. Ltd. Nanjing China State Key Laboratory of Smart Grid Protection and Control NARI Technology Co. Ltd. Nanjing China

ISBN: (纸本)9798350312690

With the gradual increase in the proportion of new energy generation, grid-forming control with dynamic regulation and support capability of frequency and voltage has become a research hotspot. However, the current-limiting control of the converter reduces the transient stability margin and leads to the complex evolution of the transient instability mode, which poses a great challenge to the stable operation of new energy units. In this paper, the influence of different current limiting strategies on the transient stability of the single-loop voltage-magnitude controlled grid-forming converter is analyzed, and three typical instability evolution modes are summarized. Further, the influence law of virtual inertia and damping parameters on the transient stability is analyzed by critical clearing angle (CCA), and critical clearing time (CCT), the mechanism of abnormal phenomena of virtual inertia and damping parameters on transient stability is revealed based on the equal area criterion, and the conditions for abnormal phenomena are clarified, finally, the transient instability evolution modes and the mechanism of abnormal phenomena is verified by electromagnetic transient time domain simulation. © 2023 IEEE.

关键词： Stability

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DC operating circuit anomaly detection based on node voltage unsupervised time series 2

DC operating circuit anomaly detection based on node voltage...

引用

2nd International Conference on New Energy and Power Engineering, ICNEPE 2022

作者： Zhang, Shen Qi Yuan, Wei Yi, Ran Chen, Li State Grid NanTongPower Supply Company Jiangsu NanTong226000 China NARI Technology Nanjing Control Systems Co. Ltd Jiangsu Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Jiangsu Nanjing211106 China

With the increase in power system load, the number of switch cabinets increases rapidly, and the accidents caused by DC operating circuits become more and more obvious. Abnormal detection has become an important part of the DC operating circuit. Abnormal data, mainly voltage measurement, often contain important information. Finding and analyzing these abnormal data can give early warning for circuit failure or failure. However, abnormal data is often difficult to obtain and lacks marks, that is, the problem of sample imbalance and unsupervised problems, resulting in abnormal detection methods that can not meet the increasing accuracy and efficiency requirements. Generative adversarial network (GAN) is an unsupervised deep learning model, which has been successfully applied to unsupervised time series anomaly detection. However, GAN has technical difficulties in the anomaly detection process, and there is still room for optimization in accuracy. In this paper, the unsupervised time series anomaly detection method based on GAN is studied, and an anomaly detection method of a DC operating circuit combined with LSTM and GAN is designed. © Published under licence by IOP Publishing Ltd.

关键词： Generative adversarial networks

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Research on Reliability Improvement Scheme of Network in smart Substation 1

引用

International Top-Level Forum on Engineering Science and Technology Development Strategy and 5th PURPLE MOUNTAIN FORUM on smart grid protection and control, PMF2020

作者： Shen, Bing Lu, Zhihao Lv, Hang Yang, Gui Li, Li State Grid Shanghai Municipal Electric Power Company Shanghai200122 China State Key Laboratory of Smart Grid Protection and Control Nanjing Jiangsu211106 China NR Electric Co. Ltd. Nanjing Jiangsu211106 China

ISBN: (数字)9789811597466

ISBN: (纸本)9789811597459

The data sharing based on process level network is the development trend of the digitalization of the secondary circuit in smart substation. However, abnormal problems of data transmission such as network storms bring certain hidden dangers to the safe and stable operation of the secondary equipment. In this paper, the main problems affecting the reliability of data transmission are analyzed, and the message management technology based on data flow control is proposed, which can effectively improve the reliability of data transmission. Aiming at the problem of cross-network data exchange, a solution based on cross-network port flow control is also proposed. © 2021, Springer Nature Singapore Pte Ltd.

关键词： Flow control

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