检索结果-内蒙古大学图书馆

smart Power & Internet Energy Systems (SPIES), International Conference on

作者： Liwen Sun Han Wu Na Meng Smart Grid Insititute Nanjing Insititute of Technology Nanjing China State Key Laboratory of Operation and Control of Renewable Energy & Storage Systems China Electric Power Research Institute Nanjing China

In this paper, we present a novel method about voltage violation for distribution networks under high stochastic load penetration. The proposed method combines extreme value theory (EVT) with Cornish Fisher series and semi invariants. In this method, the generalized extreme value (GEV) distribution directly fits the node injection load which avoids the influence of the correlation between various loads, and has the characteristic of small data demand. The efficacy of the proposed approach has been illustrated by an example analysis in the IEEE33 node system.

关键词： Renewable energy sources Stochastic processes Voltage Distribution networks Tail Probability distribution Numerical models

来源：评论

学校读者我要写书评

暂无评论

Clustering of Photovoltaic Power Stations Based on the Improved AP Clustering Algorithm

Clustering of Photovoltaic Power Stations Based on the Impro...

引用

Annual Conference of Industrial Electronics Society

作者： Yawen Ding Fei Gao Yingwei Jiang Kai Hou Donghui Zhang Xuewei Shi Key Laboratory of Control of Power Transmission and Conversion Ministry of Education College of Smart Energy Shanghai Jiao Tong University Shanghai China Dept. of Electrical Engineering Key Laboratory of Control of Power Transmission and Conversion Ministry of Education Shanghai Jiao Tong University Shanghai China NARI Group Corporation (State Grid Electric Power Research Institute) Nanjing China State Grid Jibei Zhangjiakou Wind and Solar Energy Storage and Transportation New Energy Co. Ltd Zhangjiakou China

To deal with the problem that uncertain parameter in Affinity Propagation (AP) clustering algorithm affects the clustering results, this paper proposes a clustering method based on AP clustering algorithm and Genetic Algorithm (GA) for Photovoltaic (PV) power stations. Firstly, the modeling of PV power stations is established and clustering index are determined according to the dynamic characteristics of PV power stations. Then the proposed method takes the silhouette index, which is used to evaluate the quality of the clustering result, as the fitness function of GA. The bias parameter placed on the main diagonal of the similarity matrix in the AP clustering algorithm is constantly iterated and updated until obtaining the optimization result. Finally, the studied case verifies the better clustering performance of the proposed method. The 20 PV power stations in the Taoling Substation can be simplified into three groups, reducing the complexity and calculation time for equivalent modeling.

关键词：

来源：评论

学校读者我要写书评

暂无评论

Post-Measurement Simulation-Based Pilot protection of Ac Transmission Lines in Wind Farms

SSRN

引用

SSRN 2024年

作者： Shu, Hongchun Guan, Cheng Dai, Yue Tang, Yutao State Key Laboratory of Collaborative Innovation Center for Smart Grid Fault Detection Protection and Control Jointly Kunming University of Science and Technology Kunming650500 China Faculty of Electric Power Engineering Kunming University of Science and Technology Kunming650500 China Faculty of Land Resources Engineering Kunming University of Science and Technology Kunming650500 China Faculty of Mechanical and Electrical Engineering Kunming University of Science and Technology Kunming650500 China

In AC transmission lines within wind farms, fault-induced short-circuit currents pose challenges to traditional protection mechanisms due to their limited magnitude and complex waveforms. To overcome this, a pilot protection scheme based on post-measurement simulation and model matching is proposed. An analysis of conventional protection methods' applicability to wind farm feeder lines is conducted. Using the Bergeron model, current expressions at the midpoint from both wind farm and system sides are derived. Absolute value integration within a short time window is performed. During normal operation or out-of-area faults, output line measurement matches the Belong model, resulting in small integrated current sums. Conversely, intra-area faults exhibit a mismatch, leading to significantly larger integrated current sums. Simulation results confirm robustness against transitional resistances and independence from fault distance and current transformer saturation. Theoretical analysis aligns with practical simulations.© 2017 Elsevier Inc. All rights reserved. © 2024, The Authors. All rights reserved.

关键词： Electric power transmission

来源：评论

学校读者我要写书评

暂无评论

Framework and technologies of App store in new generation power grid dispatching and control system

引用

Procedia Computer Science 2021年 183卷 754-760页

作者： Qing Zou Guanyu Wu Kun Huang Jing Yu Yuan Gao NARI Group Corporation (State Grid Electric Power Research Institute) Nanjing 211106 China Nari Technology Co. Ltd Nanjing 211106 China State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation Nanjing 211106 China State Grid Jiangsu Elect Power Co. Nanjing 210000 China

In the existing power grid dispatching and control system, the management mechanism of the software version is incomplete; the software quality is difficult to guarantee; the level of automation of the software release is low; the feedback mechanism of the software usage is lacking. So it is difficult to meet the openness requirements of New Generation Power grid Dispatching and control System (NGPGDCS). In this paper, we propose a framework of app store for NGPGDCS, and give some specific introductions to key technologies such as app review and release process, app precise recommendation and download, app intelligent upgrade, and app evaluation feedback. This solution has been piloted in some power grid dispatching and control centers at provincial level and above. Practice has proved that this solution helps to improve the quality of apps, enhance the degree of software automation release, and promote the continuous improvement of the quality of apps.

关键词： app store power grid dispatching control system review release precise recommendation intelligent upgrade evaluation feedback

来源：评论

学校读者我要写书评

暂无评论

A Risk-Averse Just-In-Time Scheme for Learning-Based Operation of Microgrids With Coupled Electricity-Hydrogen-Ammonia Under Uncertainties

引用

IEEE Transactions on Sustainable Energy 2025年

作者： Li, Longyan Ning, Chao Pan, Guangsheng Zhang, Leiqi Gu, Wei Zhao, Liang Du, Wenli Shahidehpour, Mohammad Shanghai Jiao Tong University Department of Automation Shanghai200240 China Ministry of Education of China Key Laboratory of System Control and Information Processing Shanghai200240 China School of Electrical Engineering Southeast University Nanjing210096 China Zhejiang Key Laboratory of Distributed Generations and Microgrid Technology State Grid Zhejiang Electric Power Research Institute Hangzhou310014 China Key Laboratory of Smart Manufacturing in Energy Chemical Process Ministry of Education East China University of Science and Technology China Department of Electrical and Computer Engineering Illinois Institute of Technology ChicagoIL60616 United States

This paper proposes a Risk-Averse Just-In-Time (RAJIT) operation scheme for Ammonia-Hydrogen-based Micro-grids (AHMGs) to boost electricity-hydrogen-ammonia coupling under uncertainties. First, an off-grid AHMG model is developed, featuring a novel multi-mode ammonia synthesis process and a hydrogen-ammonia dual gas turbine with tunable feed-in ratios. Subsequently, a state-behavior mapping strategy linking hydrogen storage levels with the operation modes of ammonia synthesis is established to prevent cost-ineffective shutdowns. The proposed model substantially improves operational flexibility but results in a challenging nonlinear fractional program. Based upon this model, a data-driven RAJIT scheme is developed for the real-time rolling optimization of AHMGs. Unlike conventional one-size-fits-all schemes using one optimization method throughout, the data-driven RAJIT intelligently switches between cost-effective deterministic optimization and risk-averse online-learning distributionally robust optimization depending on actual risk profiles, thus capitalizing on the respective strengths of these two optimization methods. To facilitate the solution of the resulting nonlinear program, we develop an equivalent-reformulation-based solution methodology by leveraging a constraint-tightening technique. Numerical simulations demonstrate that the proposed scheme guarantees safety and yields an overall cost reduction up to 14.6% compared with several state-of-the-art methods. © 2025 IEEE.

关键词： Ammonia

来源：评论

学校读者我要写书评

暂无评论

Hierarchical annotation method for metal corrosion detection of power equipment

引用

Journal of Southeast University(English Edition) 2021年第4期37卷 350-355页

作者： Zhang Baili Cao YongZhang Pei Zhang Zhao He Yina Zhong Mingjun School of Computer Science and Engineering Southeast UniversityNanjing 211189China State Key Laboratory of Smart Grid Protection and Control State Grid Electric Power Research InstituteNanjing 211106China NARI Group Corporation Nanjing 211106China Department of Computing Science University of AberdeenAberdeen AB243UEUK

To solve the ambiguity and uncertainty in the labeling process of power equipment corrosion datasets,a novel hierarchical annotation method(HAM)is ***,large boxes are used to label a large area covering the range of corrosion,provided that the area is visually continuous and adjacent to corrosion that cannot be clearly ***,in each labeling box established in the first step,regions with distinct corrosion and relative independence are labeled to form a second layer of nested ***,a series of comparative experiments are conducted with other common annotation methods to validate the effectiveness of *** experimental results show that,with the help of HAM,the recall of YOLOv5 increases from 50.79%to 59.41%;the recall of Faster R-CNN+VGG16 increases from 66.50%to 78.94%;the recall of Faster R-CNN+Res101 increases from 78.32%to 84.61%.Therefore,HAM can effectively improve the detection ability of mainstream models in detecting metal corrosion.

关键词： deep learning Faster R-CNN YOLOv5 object detection hierarchical annotation

来源：评论

学校读者我要写书评

暂无评论

Fast Fault protection Design and control of DC Trnasformer

Fast Fault Protection Design and Control of DC Trnasformer

引用

Sustainable Power and Energy Conference (iSPEC)

作者： Guoning Wang Zhigang Wang Xiaoming Zeng Yongwei Wang Weimei Ge State Key Laboratory of Smart Grid Protection and Control NARI Group Corporation (State Grid Electric Power Reasearch Insitute) Nanjing China State Grid Xinyuan Company Shandong TaIshan Pumped Storage Power Station Co. LTD Tai’an China

ISBN: (纸本)9781665414401

With the diversification of loads and the development of distributed energy, DC system and DC transformer attracted more and more attention in modern power system. However, bipolar short-circuit faults threatened the safety of DC power system operation due to the surge current caused by them. When DC transformer low voltage output has short circuit fault, it must block fault current quickly. This paper proposed a fault protection control method in DC transformer. Through the design and control, the fault current can be quickly blocked, and the fault current output can be maintained to support the rapid recovery of the system. After adding the fault protection circuit and control in DC transformer, the protection performance is greatly improved. Finally, the real-time simulation of RTDS verifies that the proposed short-circuit protection current-limiting control can well achieve the design goals.

关键词： Low voltage Conferences Fault protection Surge protection Transformers Real-time systems Safety

来源：评论

学校读者我要写书评

暂无评论

A strategy for avoiding overload of AC line after blocking dc line in AC/DC hybrid grid 15

A strategy for avoiding overload of AC line after blocking d...

引用

15th International Conference on Developments in Power System protection, DPSP 2020

作者： Wang, Hao Kang, Xiaoning Dong, Xinzhou Shaanxi Key Laboratory of Smart Grid Xi'an Jiaotong University Xi'an China State Key Laboratory of Control and Simulation Power System and Generation Equipment Tsinghua University Beijing China

ISBN: (纸本)9781713827894

The development of DC transmission technique is prompting the development of AC/DC hybrid grid. As a new form of the grid, AC/DC hybrid grid faces many challenges one of which is the effect of DC blocking on AC lines. This paper analyses the influence of DC blocking on AC lines. Based on the analysis, a control strategy using wide area information is proposed to avoid the severe overload of AC line after blocking a DC line. The proposed strategy increases the transmission power of normally operating DC line aiming to afford part or all of the transmission task of the blocked DC line. The test result obtained from simulation indicates that the proposed strategy can reduce the overload of AC line after blocking a DC line. © 2020 IET Conference Publications.

关键词： Transmissions

来源：评论

学校读者我要写书评

暂无评论

Carbon-oriented Local Integrated Energy System Multi-energy Coupling Market Design 5

Carbon-oriented Local Integrated Energy System Multi-energy ...

引用

5th IEEE Conference on Energy Internet and Energy System Integration, EI2 2021

作者： Li, Jifeng Li, Jinghua He, Xingtang Luo, Hao Dalian Electric Power Supply Company State Grid Liaoning Electric Power Supply Co. Ltd Dalian China Key Laboratory of the Ministry of Education on Smart Power Grids Tianjin University Tianjin China Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Northeast Electric Power University Jilin China

ISBN: (纸本)9781665434256

Under the background that countries all over the world constantly advocate energy conservation and emission reduction and seek to deepen the reform of power systems and introduce new energy trading policies, this study constructed a carbon-oriented local integrated energy system multi-energy coupling market architecture. This construct was aimed at problems that current multi-energy coupling market research has not considered, including multi-energy substitution characteristics and carbon emission factors. First, taking the local integrated energy system as the main physical architecture, a multi-energy coupling market architecture was constructed combining the main market participants of different energy subsystems. Second, a model of the subsystem markets in the energy coupling market, and the joint clearing method were proposed. Finally, the guiding role of the energy coupling market was analyzed by simulation for reasonable pricing and carbon emission reductions of different energy market operators. © 2021 IEEE

关键词： Carbon

来源：评论

学校读者我要写书评

暂无评论

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

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

引用

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

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：