检索结果-内蒙古大学图书馆

7th IEEE Conference on Energy Internet and Energy system Integration, EI2 2023

作者： Xiang, Jiaxiong Yang, Bo Wang, Shibo Zhang, Zhi Pei, Zheyi Li, Kecheng Zhou, Guangqi Zhou, Ming North China Electric Power University State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources Beijing China China Electric Power Research Institute State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems Beijing China State Grid Shandong Electric Power Research Institute Jinan China State Grid Corporation of China Beijing China China Electric Power Research Institute Beijing China

ISBN: (纸本)9798350345094

With the integration of a large number of wind and solar new energy power generation into the power grid, the system faces frequency security issues. Energy storage stations (ESS) can effectively maintain frequency stability due to their ability to quickly adjust power. Due to the differences in the state of each ESS and the topology of the power grid, it is difficult to evaluate the frequency support capability of the energy storage cluster (ESC) in real-time. This paper proposes a real-time evaluation model for the aggregated frequency support capability of ESC. The evaluation indicators for inertia support and primary frequency regulation (PFR) capability is proposed respectively. Considering the aggregation effect of ESC, the evaluation of frequency support ability for ESC is transformed into an optimization problem. This article establishes evaluation models for the inertia support capability and primary frequency regulation capability of ESC, respectively. In the evaluation model, we establish frequency response models for ESS based on virtual inertia and droop control, considering the differences in the states of each ESS and network security constraints. The case study shows that the model can evaluate the frequency support capability of energy storage clusters based on their real-time status. When considering network constraints, the supporting capacity of ESC exhibits spatial distribution characteristics. © 2023 IEEE.

关键词： Energy storage

来源：评论

学校读者我要写书评

暂无评论

Optimal Economic Dispatch Strategy for Microgrids Considering Distributed Energy Storage Aggregation 7

Optimal Economic Dispatch Strategy for Microgrids Considerin...

引用

7th IEEE Student Conference on Electric Machines and systems, SCEMS 2024

作者： Kan, Changtao Luo, Xin Liang, Shuang State Grid Jinan Power Supply Company Jinan China State Grid Shandong Electric Power Company Maintenance Company Jinan China Key Laboratory of Power System Intelligent Dispatch and Control Ministry of Education Shandong University Jinan China

ISBN: (纸本)9798350366945

User-side distributed energy storage, as a flexible demand response resource, possesses excellent source-load interaction characteristics and can effectively interact with the power grid. However, currently in China, user-side distributed energy storage resources often face difficulties in directly participating in grid regulation due to factors such as dispersed geographical distribution, small individual installed capacity, and uncertain output time. To address this issue, this paper proposes an optimal economic dispatch strategy for microgrids that considers distributed energy storage aggregation. First, a distributed energy storage aggregator is introduced to manage scattered user-side distributed energy storage resources in a scaled manner, and the scheduling potential of distributed energy storage in each time period is assessed based on consumer psychology theory. Subsequently, a multi-objective optimal dispatch model for microgrids is constructed, which takes into account both economic and environmental aspects. The multi-objective optimization problem is transformed into a single-objective optimization problem using the weighted assignment method, and the CPLEX solver is employed to solve the problem. Finally, the effectiveness and feasibility of the proposed method in this paper are verified through a microgrid test system. © 2024 IEEE.

关键词： consumer psychology theory distributed energy storage resources economic dispatch

来源：评论

学校读者我要写书评

暂无评论

Electricity theft detection model based on feature engineering and integrated classifier

Electricity theft detection model based on feature engineeri...

引用

2024 8th International Conference on Electrical, Mechanical and Computer Engineering (ICEMCE)

作者： Huijie Liu Qingsheng Zhao Dingkang Liang Shanxi Key Laboratory of Power System Operation and Control Taiyuan University of Technology Taiyuan Shanxi China

ISBN: (数字)9798331506230

ISBN: (纸本)9798331506247

Focused on tackling the issue because the electricity theft detection model has low applicability and the recognition rate is greatly affected by subjective factors like manual extraction features, a power-stealing user recognition model based on feature engineering and integrated classifier is proposed. The model uses Tsfresh and Whale Optimization Algorithm (WOA) as the main feature extraction and selection tool. Then we use an integrated classifier to identify the abnormal users. Firstly, we collected the electricity consumption data of 600 different users for 583 consecutive days. Secondly, the rough feature extraction is performed by Tsfresh and the variance-based method. Thirdly, the Whale Optimization Algorithm is used to finely select the features, getting the most suitable feature parameters. Finally, the integrated classifier is used to classify abnormal users. After evaluating the performance of different classifiers ensemble, an integrated classifier is composed of a Decision Tree (DT), Support Vector Machine (SVM), and Random Forest (RF). Meanwhile, in terms of feature extraction, we compared the results of three single classifiers which consist of the integrated classifier, also compared with other feature selection and classification methods. The experimental results show that the average accuracy of this method is 96.11%, which is higher than other methods.

关键词： Support vector machines Accuracy Electricity Computational modeling Manuals Feature extraction Whale optimization algorithms Classification algorithms Random forests Classification tree analysis

来源：评论

学校读者我要写书评

暂无评论

Construction and verification of a power simulation system middle platform based on domain driven design and microservices

Construction and verification of a power simulation system m...

引用

2023 International Conference on Artificial Intelligence, systems and Network Security, AISNS 2023

作者： Guo, Qi Zhang, Jie Lu, Yuanhong Tu, Liang Guo, Haiping Luo, Hui Huang, Libin CSG Electric Power Research Institute Co. Ltd State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou510663 China National Energy Power Grid Technology RandD Centre Guangzhou510663 China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou510663 China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou510663 China

ISBN: (纸本)9798400716966

Aiming at the problems of complex design, low scalability and low reusability of resources in the power simulation system, a middle-platform design scheme based on domain-driven design and microservice data is proposed. Through an in-depth study of domain-driven design theory and the characteristics of microservices, this paper proposes a middle-platform design scheme for the power simulation system based on exploring the structure of the power simulation system and the system domain-driven model, and combining the functional requirements and structural characteristics of the simulation software. Finally, this paper verifies that the middle-platform construction of the power simulation system based on domain-driven design and microservices has the characteristics of high scalability, high maintainability and high reusability of resources through the application and analysis of typical business scenarios of power simulation. © 2023 ACM.

关键词： Reusability

来源：评论

学校读者我要写书评

暂无评论

Spatial-Temporal Attention Mechanism and Graph Convolutional Networks Based Distributed PV Ultra-short-term power Forecasting

Spatial-Temporal Attention Mechanism and Graph Convolutional...

引用

2023 IEEE International Conference on Energy Technologies for Future Grids, ETFG 2023

作者： Liu, Xinyu Xie, Xu Fang, Qin Xu, Fei Huang, Chen Zhen, Zhao Wang, Fei State Grid Chongqing Electric Power Company Chongqing400015 China Shinan Power Supply Branch State Grid Chongqing Electric Power Company Chongqing China Tsinghua University State Key Laboratory of Power System Operation and Control Beijing100084 China North China Electric Power University Department of Electrical Engineering Baoding071003 China

ISBN: (纸本)9781665471640

To ensure the efficient operation and healthy development of photovoltaic power generation systems, reliable distributed photovoltaic power prediction is significant. However, the lack of modeling ability of existing distributed photovoltaic power forecasting methods for dynamic spatiotemporal correlation of distributed photovoltaic power data limits the further improvement of prediction accuracy. Therefore, a distributed photovoltaic ultra-short-term power forecasting method based on spatial-temporal attention mechanism and graph convolutional networks is proposed in this paper. Firstly, distributed photovoltaic cluster is divided into sub-regions and graph structured data can be generated with each sub-region being a node on the graph. Then, spatial-temporal attention mechanism is used to adaptively capture spatiotemporal correlation information and dynamically update adjacency matrix. Finally, spatial-temporal convolution is used to extract deep spatiotemporal features of distributed photovoltaic power data and achieve regional power prediction. The validity and progressiveness of the model have been verified in real world data sets. © 2023 IEEE.

关键词： distributed photovoltaic graph convolutional networks spatial-temporal attention mechanism ultra-short-term power forecasting

来源：评论

学校读者我要写书评

暂无评论

A 100% PV powered microgrid operates independently and stably

引用

Energy Internet 2024年第2期1卷 113-115页

作者： Wenchuan Wu Zizhen Guo Haotian Liu Guannan Wu Siyun Li Yuwei Cheng Department of Electrical Engineering(State Key Laboratory of Power Systems Operation and Control) Tsinghua UniversityBeijingChina

1|INTRODUCTION In Linyi,Shandong,China,researchers used 100%grid-forming(GFM)photovoltaics(PVs)to power the microgrid without the conventional synchronous *** microgrid operates independently and stably supporting the seamless transition between islanded and grid-connected *** to the grid-following(GFL)method,GFM enables renewable sources to behave like voltage sources with the transient frequency and voltage *** is the key technology for the renewable generations to replace the con-ventional generations to maintain the synchronous stability of the ***,most GFM methods are developed for the battery energy storage system(BESS)and focus on the single-machine level to emulate the conventional synchronous machine,such as virtual synchronous machine(VSM)1 and droop control.2 These methods tend to lose the synchronous stability in response to the large disturbances under the multi-machine conditions.

关键词： replace battery maintain

来源：评论

学校读者我要写书评

暂无评论

Simulation of Arc Erosion on the Main Contact of On-Load Tap Changer 4th

Simulation of Arc Erosion on the Main Contact of On-Load Tap...

引用

4th International Symposium on Insulation and Discharge Computation for power Equipment, IDCOMPU 2023

作者： Zhou, Yuanxiang Dai, Yasong Chen, Jianning Li, Yuhang Hou, Xuzhao Zhang, Zhen State Key Laboratory of Control and Simulation of Power Systems and Generation Equipment Department of Electrical Engineering Tsinghua University Beijing100084 China The Wind Solar Storage Division of State Key Laboratory of Power System and Generation Equipment School of Electrical Engineering Xinjiang University Urumqi830047 China

ISBN: (纸本)9789819974047

Long-term operation and switching of transformer on-load tap-changers can cause degradation and deterioration of the main contact material, even leading to contact arcing damage in severe cases. However, the arcing mechanism of the main contact during the switching has not been clarified yet. A magneto-hydrodynamic simulation method of main contact arcing has been proposed. The geometry of the main contact in transformer oil is simplified, and the simulation model of the arc temperature field of the main contact in transformer oil coupled with electric, magnetic, thermal and fluid fields is proposed. The dynamic evolution of the arc temperature has been investigated at peak currents of 2100 A, 1500 A, 600 A and 300 A, respectively. The results show that with the increase of the spacing between contacts, the temperature at arc core rises rapidly and then decreases slowly, and the temperature can reach 50177 K at 2100A. Due to the electron bombardment at the anode surface, the temperature at anode surface is higher than that at cathode surface under different chopped currents. The highest temperatures at anode and cathode surface can reach 4142.5 K and 4081.7 K respectively. © Beijing Paike Culture Commu. Co., Ltd 2024.

关键词： Deterioration

来源：评论

学校读者我要写书评

暂无评论

operational Reliability Modeling and Assessment of Battery Energy Storage Based on Lithium-ion Battery Lifetime Degradation

引用

Journal of Modern power systems and Clean Energy 2022年第6期10卷 1738-1749页

作者： Lin Cheng Yuxiang Wan Yanglin Zhou David Wenzhong Gao State Key Laboratory of Control and Simulation of Power System and Generation Equipment Department of Electrical EngineeringTsinghua UniversityBeijingChina Department of Electrical and Computer Engineering University of DenverDenverUSA IEEE

Battery energy storage(BES)systems can effectively meet the diversified needs of power system dispatching and assist in renewable energy *** reliability of energy storage is essential to ensure the operational safety of the power ***,BES systems are composed of battery *** suggests that BES performance depends not only on the configuration but also on the operating state over different lifetime *** lack of safety and reliability is the main bottleneck preventing widespread applications of BES ***,a reliability assessment algorithm and a weak-link analytical method for BES systems are proposed while considering battery lifetime ***,a novel lithium-ion battery model is proposed to identify the degradation rate of solid electrolyte interphase film formation and capacity *** impacts of different operating conditions are considered in stress factor ***,a reliability assessment algorithm for a BES system is introduced based on a universal generating *** innovative weak-link analytical method based on the reliability importance index is proposed that combines the evaluation results of state-oriented and state-change-oriented indexes through an entropy weight *** model,algorithm,indexes,and the usefulness are demonstrated in case studies based on aging test data and actual bus operating *** results demonstrate the effects of the battery status and working conditions on BES ***-link analysis is also used to assist BES systems in avoiding short-board batteries to achieve long lifetimes and efficient operation.

关键词： Battery energy storage lifetime degradation operational reliability capacity plummeting weak-link analysis

来源：评论

学校读者我要写书评

暂无评论

A Value Set Approach for Stability Region Determination for Time Delayed power systems with Multiple Uncertain Parameters 7

A Value Set Approach for Stability Region Determination for ...

引用

7th IEEE International Electrical and Energy Conference, CIEEC 2024

作者： Shi, Xiubao Ye, Hua Gao, Lei Hou, Kaiyuan Wang, Kefei Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China China Electric Power Research Institute Power System Department Beijing China State Grid Cooperation of China Dispatch and Communication Center Northeast Branch Shenyang China

ISBN: (纸本)9798350359558

This paper develops a stability region computation method for time delayed power systems based on the value set method. It is designed to accommodate systems with multiple uncertain parameters and time delays. This method serves to analyze the small signal stability margin of power systems and offer guidance for system parameter design. Different from many previous works, this method achieves relatively high efficiency without any conservativeness. First, it processes polynomials with exponentials through polynomial transformations. Second, by continuously subdividing and discriminating the uncertain space, the parameter stability region of the system is obtained. Finally, the effectiveness and accuracy of the proposed method are validated through simulation examples in MATLAB/Simulink. © 2024 IEEE.

关键词： Time delay

来源：评论

学校读者我要写书评

暂无评论

Coordinated Damping Optimization control of Sub-synchronous Oscillation for DFIG and SVG

引用

CSEE Journal of power and Energy systems 2021年第1期7卷 140-149页

作者： Xinshou Tian Yongning Chi Yan Li Haiyan Tang Chao Liu Yuanyuan Su State Key Laboratory of Operation and Control of Renewable Energy&Storage Systems(China Electric Power Research Institute) Beijing 100192China

Currently, the power electronics-based devices, includinglarge-scale non-synchronized generators and reactivepower compensators, are widely used in power grids. This helpsintroduce the coupling interactions between the devices andthe power grid, resulting in a new sub-synchronous oscillationphenomenon. It is a critical element for the stability operation ofthe power grid and its devices. In this paper, the sub-synchronousoscillation phenomenon of the power grid connected with largescalewind power generation is analyzed in detail. Then, inorder to damp the sub-synchronous oscillation, a coordinateddamping optimization control strategy for wind power generatorsand their reactive power compensators is proposed. The proposedcoordinated control strategy tracks the sub-synchronousoscillation current signal to correct the corresponding controlsignal, which increases the damping of power electronics. Theresponse characteristics of the proposed control strategy areanalyzed, and a self-optimization parameter tuning method basedon sensitivity analysis is proposed. The simulation results validatethe effectiveness and the availability of the proposed controlstrategy.

关键词： Coordinated damping optimization control DFIG self-optimization parameter tuning method subsynchronous oscillation SVG

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：