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检索条件"机构=State Key Laboratory of Smart Grid Protection and Operation"

共 423 条记录，以下是61-70 订阅

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Research on Coordination Strategy of Emergency and Correction Control under High Proportion of New Energy Connected to Power grid 6

Research on Coordination Strategy of Emergency and Correctio...

引用

6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

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

ISBN: (纸本)9798350347159

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. © 2022 IEEE.

关键词： Decision making

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Evaluation and Management of operation state of Distribution Station Area Based on Incentive Demand Response 1

引用

6th PURPLE MOUNTAIN FORUM on smart grid protection and Control, PMF2021

作者： Jin, Peng Wu, Hai Hu, Guo Shen, Qian State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Jiangsu Nanjing211106 China

ISBN: (数字)9789811671562

ISBN: (纸本)9789811671555

The popularization and promotion of smart home appliances and electric vehicles represents a challenge as well as an opportunity for distribution system operators. On the one hand, these new loads will significantly increase the operating burden of the distribution area;on the other hand, the controllability of these new devices also makes it possible to meet various technical and commercial purposes through flexible solutions such as incentive demand response. Based on the massive operation data collected from electricity meters, low-voltage fault indicators, leakage protection units and other devices in the distribution station area, a fuzzy comprehensive evaluation method is proposed to manage the operation status of low-voltage circuit in distribution station area. Then the evaluation results are applied to the incentive demand response, which realizes the comprehensive management of three-phase unbalance and under-voltage of low-voltage circuit in distribution station area through reducing load. The simulation results show that the proposed strategy can quantitatively evaluate the operation status of the distribution station area, and improve the load distribution and voltage level of distribution station area significantly through utilizing incentive demand response. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Domestic appliances

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An Improved Single-Phase Fault Line Selection Method for Non-effectively Grounded System Based on Transient Energy 6th

An Improved Single-Phase Fault Line Selection Method for Non...

引用

6th PURPLE MOUNTAIN FORUM on smart grid protection and Control, PMF2021

作者： Xia, Lei Hu, Guo Wu, Hai Hu, Song State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Jiangsu Nanjing211106 China

ISBN: (纸本)9789811671555

The domestic distribution network is mainly non-effectively grounded system, single-phase grounding fault accounts for more than 80% of the total number of faults, the fault characteristics are not obvious and easy to be affected by noise signals, at the same time, the polarity of zero sequence voltage and current transformer is unknown or reverse connection often occurs, which makes the local fault identification and line selection more difficult, and directly affects the fault response speed and disposal efficiency. In this paper, an improved single-phase to ground fault line selection method based on transient energy is proposed. By using the energy matching degree of transient zero mode current in each interval and the polarity relationship between transient zero mode current and steady-state zero sequence current in this interval, the existing fault line selection methods are easy to be affected by the polarity of external mutual inductors, and the polarity of mutual inductors can’t be checked online in the fault process. The physical concept of the method is clear, and the criterion threshold is not affected by the grounding mode and fault location of the system. RTDS simulation experiment and field engineering application verify the effectiveness and universality of the proposed fault line selection method. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Electric grounding

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A Defects Detection System for Substation Based on YOLOX 5

A Defects Detection System for Substation Based on YOLOX

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5th IEEE International Electrical and Energy Conference, CIEEC 2022

作者： Cui, Yao Huang, Xin Zhang, Xin Ye, Junjie Zhong, Linlin State Key Laboratory of Smart Grid Operation and Control Nanjing China Southeast University School of Electrical Engineering Nanjing China

ISBN: (数字)9781665411042

ISBN: (纸本)9781665411042

To improve the intelligent supervision level of substation, a defects images dataset facing to substation scenario was built by collecting and labeling a huge number of images about substation equipment defects. Then a transfer learning model based on the YOLOX model was trained by adjusting the model training parameters. Finally, a model with 87.4 % mean average precision and affordable speed (about 0.07 second per image) was constructed. And the experiments results proved that this model can detect the preset defects of substation equipment accurately in acceptable speed according to the visible image obtained from monitoring equipment, which means it has satisfying application potential in future. © 2022 IEEE.

关键词： Object detection

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Research and Application of Configuration Animation Technology for Power grid Dispatching and Control Systems Based on CIM/G 7th

Research and Application of Configuration Animation Technolo...

引用

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

作者： Yan, Zhen Xu, Hua Lv, Zhimeng Yin, Xia Bao, Xiongwei Huang, Kun Nanjing211106 China NARI Technology Co. Ltd Nanjing211106 China State Key Laboratory of Smart Grid Protection and Control Nanjing211106 China

ISBN: (纸本)9789819900626

For the current traditional power grid dispatching and control system, the display effect of configuration software interface is ordinary, and the configuration interface is cumbersome. This paper presents a state animation technology of configuration software for power grid and control system. By defining multiple states in the configuration editor, modifying component attributes in different states, setting state switching animation types, associating the animation change functions of component attribute values in different states, saving in CIM/G format, and then opening the corresponding files through the browser, the component attributes can be dynamically transformed between attribute values in different states, Batch modification and animation of component attributes are realized, which enriches the display effect of the interface and improves the friendliness of human-computer interaction. © state grid Electric Power Research Institute 2023.

关键词： Control systems

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Failure mode risk analysis of DC charger based on cloud model and TOPSIS 14

Failure mode risk analysis of DC charger based on cloud mode...

引用

14th IEEE Global Reliability and Prognostics and Health Management Conference, PHM-Hangzhou 2023

作者： Yuan, Li Wen, Tan Su, Yan Yi, Zichao Wang, Yu State Key Laboratory of Smart Grid Protection and Control Nari Group Corporation Nanjing China Nanjing University of Aeronautics and Astronautics College of Civil Aviation Nanjing China

ISBN: (纸本)9798350301359

This paper overcomes the shortcomings of the traditional Risk assessment method of Risk Priority Number (RPN). The evaluation process is established by combining the Technique for Order Preference by Similarity to an Ideal Solution (TOPSIS) with the cloud model theory. And applied to solve the DC charger failure mode risk assessment, analysis and determination of DC charger key failure mode and failure mechanism. Firstly, the expert assessment information of DC charger fault mode was converted into a cloud model, and then the risk assessment index and expert weight of risk assessment were calculated. Finally, the TOPSIS method was used to determine the risk priority of the fault mode, and the failure mechanism of the high-priority fault mode was analyzed to determine the failure physical model. © 2023 IEEE.

关键词： cloud model Dc charger failure mechanism risk assessment TOPSIS method

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Thermal runaway difference between fresh and retired lithium iron phosphate batteries under overheating 2

Thermal runaway difference between fresh and retired lithium...

引用

2023 2nd International Conference on Green Energy and Power Systems, ICGEPS 2023

作者： Wang, Cong-Jie Wang, Shu-Ping Gao, Fei Li, Chang-Hao Zhu, Yan-Li State Key Laboratory of Explosion Science and Technology Beijing Institute of Technology Beijing100081 China Anhui Province Key Laboratory of Electric Fire and Safety Protection State Grid Laboratory of Fire Protection for Transmission and Distribution Facilities State Grid Anhui Electric Power Research Institute Hefei230601 China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Beijing100192 China

Safety is an important factor restricting the cascade utilization of lithium-ion batteries (LIBs). In this paper, the safety characteristics of fresh and retired lithium iron phosphate batteries are investigated by means of a heating-triggered thermal runaway (TR). The results show that under the heating condition of 200 W, the internal short circuit (ISC) can directly cause the TR of a new battery and lead to an explosion with an overpressure of 98.9 kPa. However, there is still a buffer time of 13.1-22.3 min between the ISC and TR for the retired battery with states of health (SOHs) of 80% - 60%, and the retired battery cannot explode. The large-scale ISC onset time, TR onset time, and TR onset temperature of the 70% SOH battery are 27.4 min, 40.5 min, and 179.9 °C, respectively, which are the smallest among retired batteries, indicating that the 70% SOH battery may be more likely to trigger TR. The findings can provide guidance for the safe application of retired batteries. © Published under licence by IOP Publishing Ltd.

关键词： Lithium-ion batteries

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Parameter Identification of Distribution Line Based on Noise Adaptive Kalman Filtering 3

Parameter Identification of Distribution Line Based on Noise...

引用

3rd New Energy and Energy Storage System Control Summit Forum, NEESSC 2023

作者： Zu, Guoqiang Huang, Xu Jin, Cuicui Ding, Qi Yao, Ying Ji, Wenwen Electric Power Research Institute Tianjin Electric Power Company of State Grid Tianjin China Operation and Maintenance Department Tianjin Chengdong Power Supply Company of State Grid Tianjin China Smart Grid Key Laboratory of Ministry of Education Tianjin University Tianjin China

ISBN: (纸本)9798350309348

Algorithm for three-phase line parameter identification based on noise adaptive Kalman filtering is proposed to address the problem of large deviation between measurement data and true values due to factors such as equipment aging and line interference, which affects the accuracy of parameter identification based on measurement data. Firstly, a state equation and a measurement equation for noise adaptive Kalman filtering are established based on the three-phase line model of the distribution system considering the coupled impedance. Then, an adaptive correction method for noise is introduced to continuously update the covariance matrix of measurement noise based on the residuals (i.e., the difference between the measured values and the predicted values), reducing the interference caused by the error in the covariance matrix of measurement noise and improving the accuracy of parameter identification results. The effectiveness of the proposed method is verified through case analysis results. Compared to traditional Kalman filtering methods, the proposed method in this paper achieves higher identification accuracy. ©2023 IEEE.

关键词： Covariance matrix

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National Carbon Market Supply Demand Balance Analysis Based on Unit Level Heterogeneous Characteristic Modeling 11

National Carbon Market Supply Demand Balance Analysis Based ...

引用

11th International Conference on Innovative smart grid Technologies - Asia, ISGT-Asia 2022

作者： Lai, Yening Zhang, Yifei Huang, Jie Chen, Xuetong NARI Technology Co. Ltd. State Key Laboratory of Smart Grid Protection and Control Nanjing China

ISBN: (纸本)9798350399660

The national carbon market is the major market mechanism supporting China's '30•60' target. This market involves natural sciences, such as energy technology and climate science, and social sciences, such as politics and economics related to energy economy, policy, and human behavior. This makes the carbon market a typical cyber-physical-social system in energy (CPSSE). This paper focuses on modeling objective physical parameters associated with market participants. The paper proposes a model and value assignment method for unit-level heterogeneous parameters and constructs a unit-level dataset of national carbon market participants. The influences of the heterogeneous levels of different parameters on the micro supply-demand balance are then evaluated. The study details the quantitative influences of the proportion of units without key parameter measurements and the shape of the distribution of the units' coal consumption rates. This study establishes a unit-level model and parameter foundation for conducting a national carbon market hybrid simulation. © 2022 IEEE.

关键词： Carbon

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Frequency Regulation Potential Evaluation of Temperature-Controlled Load Aggregators Considering Demand Response Willingness 6

Frequency Regulation Potential Evaluation of Temperature-Con...

引用

6th IEEE Conference on Energy Internet and Energy System Integration, EI2 2022

作者： Yu, Jie Yang, Jiaqi Ding, Qia Tu, Mengfu Ji, Weixi Southeast University Electrical Engineering Nanjing China State Key Laboratory of Smart Grid Protection and Control Nanjing China

ISBN: (纸本)9798350347159

The frequency regulation potential of temperature-controlled load aggregators means that, the total load reduction that all the aggregated temperature-controlled load users can participate in the frequency regulation. User demand response willingness refers to the willingness of users to adjust electricity consumption according to the price of electricity sales to provide demand response based on their own demand response elasticity. This paper establishes a user demand response willingness model including two parts of electricity cost change and temperature change, which is used to characterize the relationship between user frequency regulation potential and electricity price;then proposes a time series chained two-dimensional cloud generator algorithm for the willingness model to predict the temperature-controlled load operating state in the temperature-controlled load, and finally establish a two-layer model to optimize the frequency regulation potential of the temperature-controlled load aggregator, with the frequency regulation potential as the solution variable. The effectiveness of the algorithm and the model are verified through calculation examples, and sensitivity analysis is carried out. © 2022 IEEE.

关键词： Sensitivity analysis

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