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12th International Conference on Renewable power Generation, RPG 2023

作者： Jia, Lingjie Peng, Xiaotao He, Jing Li, Shaolin Miao, Fenglin Hubei Key Laboratory of Power Equipment & System Security for Integrated Energy School of Electrical Engineering and Automation Wuhan University China School of Electrical Engineering and Automation Wuhan University China China Electric Power Research Institute Beijing China

With the increasingly prominent energy and environmental problems, wind power generation with its advantages of clean, flexible, sustainable and other advantages in the grid account for an increasing *** is important to study the electromechanical transient model of wind turbine low voltage ride-through (LVRT) and its modeling method based on the measured data to improve the analysis results of the transient response characteristics of wind power grid-connected system to voltage faults. In this paper, based on Doubly-Fed Induction Generator (DFIG), firstly, the dynamic regulation process of converter and generator is ignored, and based on the electromechanical transient model of wind turbine active-reactive power regulation command to stator output active-reactive current respectively, the typical active-reactive power control mode of wind turbine LVRT is studied according to the measured power response curve of LVRT, and the active-reactive power limitation strategy during LVRT. The typical active-reactive power control method of LVRT and the active-reactive power limiting strategy during LVRT are investigated. Then, a method is proposed to identify the fault ride-through control strategy using the characteristic points of the power, voltage and current response curves of the measured voltage fault ride-through. Based on analyzing the main control parameters of the model with the parameter sensitivity, an optimization method based on the least square method is proposed to identify the model parameters step by step. Finally, the validity of the model and the identification method are verified by using Matlab/Simulink simulation and real measurement data, and the robustness of the model is verified by using operating conditions with different degrees of voltage dips. © The Institution of Engineering & technology 2023.

关键词： Wind turbines

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Distribution Pattern and Differentiation Thresholds of Gas Content in Large Oil-Filled Equipment 7

Distribution Pattern and Differentiation Thresholds of Gas C...

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

作者： Liu, Rui Niu, Shilong Chen, Li He, Qing Yang, Tianhe Huang, Meng State Grid On-site Test and Evaluation Technology Laboratory For High Voltage Electrical Equipment Hubei Electrical Power Research Institute Wuhan China North China Electric Power University State Key Laboratory of New Energy Power System Beijing China State Grid Hubei Power Co. Wuhan China

ISBN: (纸本)9798350345094

In the existing threshold calculation methods, there are problems such as establishing distribution models based on large group data of different types of oil-filled equipment, or specifying the threshold using normal dissolved gases analysis (DGA) data of some individuals while fault data of others, etc. In order to address these problems, this paper proposes a differentiation gas content threshold calculation method applicable to large oil-filled equipment individuals. The method is based on the gas content normal data and fault data of individuals of oil-filled equipment, establishes parameter model based on the Weibull distribution to fit the data, and uses the inverse cumulative distribution function and the P-R curve to calculate and select the reasonable thresholds as the attention value and warning value. The differentiated thresholds are obtained for five kinds of large oil-filled equipment individuals, and compared with the traditional threshold calculation method, the thresholds obtained by this method are more effective in identifying defects and faults, and can significantly reduce the occurrence of false alarms and omissions. © 2023 IEEE.

关键词： Weibull distribution

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research on Centralized Optimization Clearing Method for Interregional Spot Market

Research on Centralized Optimization Clearing Method for Int...

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2022 power system and Green Energy Conference, PSGEC 2022

作者： Han, Bin Hu, Chenxu Yuan, Xue Yu, Mingkai Wang, Jianxiao Zhang, Lu Chang, Naichao Mu, Yongzheng Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research Institute Beijing China School of Electrical and Electronic Engineering North China Electric Power University Beijing China College of Information and Electrical Engineering China Agricultural University Beijing China National Power Dispatch Control Center Beijing China

ISBN: (数字)9781665499934

ISBN: (纸本)9781665499934

The paper presents an in-depth analysis of the clearing process of the interregional renewable energy spot market currently in operation and the trading path construction method, and explains the issues that need to be considered for the future development of this market. On this basis, a centralized and efficient interregional spot market clearing model is proposed, which makes full use of the current trading path construction method, considering the same optimization objective of price difference matching method and security constraints of interregional and regional power grids. With high scalability, this model can meet the requirements of power grid safe operation and further improve the enforceability of market clearing results. It can provide theoretic support for the development of interregional spot market and the effective coordination between cross regional and regional spot market in the future. A case study of a 5-region system is adopted to verify the correctness and effectiveness of the proposed model. © 2022 IEEE.

关键词： Electric power transmission networks

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A Heuristic Algorithm Based on Characteristic Analysis for Unit Commitment Problem

A Heuristic Algorithm Based on Characteristic Analysis for U...

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power Engineering (ICPE), International Conference on

作者： Shengnan Xu Qiang Ding Yi Pan Zhi Cai Chenda Zheng Shaoqun Song Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research Institute Beijing China State Grid Fujian Electric Power Company Fuzhou China

To improve the algorithm performance of mixed integer programming, determining the state of some integer variables in advance is the most direct and effective method. In this paper, we propose a heuristic algorithm based on characteristic analysis of unit and load for unit commitment problem. Starting with the initial state of a given unit, the state of every unit at each time point is examined. Then, the unit is considered to be put into operation when the system positive reserve not be met, and taking the load intersection line across this operation point to obtain all load characteristic values corresponding the unit, such as the load intersection point, intersection point-pair, regression time and so on. Finally, based on the division of load period, the treatment of the unit is determined one by one. By testing the standard examples and practical examples, the proposed method can save about 30% of computing time, which effectively improves the performance of mixed integer programming.

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Fast N–x Topology Analysis Method Based on Node Branch Calculation Model

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Dianwang Jishu/power system technology 2023年 47卷 51-59页

作者： Liu, Sheng Shi, Shangqiu Sun, Bo Yu, Yijun Tang, Junci Li, Tong Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research Institute Haidian District Beijing100192 China State Grid Liaoning Electric Power Corporation Liaoning Province Shenyang110000 China State Grid Liaoning Electric Power Research Institute Liaoning Province Shenyang110000 China

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Cloud-Edge Collaboration Generation and Sharing Method of Dispatching and Control Sample Data

Cloud-Edge Collaboration Generation and Sharing Method of Di...

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Data Science and Network Security (ICDSNS), International Conference on

作者： Dapeng Li Jie Zhang Yunhao Huang Ling Yu Jian Chen Lei Tao Jiaqi Wang Jingan Shang Cong Fu Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research Institute Beijing China State Grid Tianjin Electric Power Company Tianjin China

Artificial intelligence technologies represented by machine learning and deep learning have been studied and applied in the field of power grid regulation, but there are problems such as scattered application results and poor data resource sharing. In order to meet the application requirements of artificial intelligence in power grid regulation and improve the training effect of the model, relying on the multi-level shared architecture and massive data resources provided by the regulation cloud, cloud edge collaboration technology is adopted to design the generation and sharing method of regulation business sample data, achieving collaborative management of sample data, and promoting the inheritance and development of resources and experience in the regulation field.

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An Auxiliary Decision-Making Model through Comprehensive Utilization of Multi-type Active power Adjustment Resources

An Auxiliary Decision-Making Model through Comprehensive Uti...

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International Conference on power and Energy technology (ICPET)

作者： Zhengping Chen Fangdong Wang Xichen Tian Yan Lv Wenjian Wang Zhi Cai State Grid Fujian Electric Power Dispatching and Control Center State Grid Fujian Electric Power Company Fuzhou China Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research Institute Beijing China

ISBN: (数字)9798350375855

ISBN: (纸本)9798350375862

As the construction of the new power system progresses, the marked increase in the penetration rate of renewable energy, the intensified coupling of multi-energy systems, the closer interconnection among regional power grids, and the accelerated advancement of electricity market reforms have significantly heightened the complexity and uncertainty of the system. These developments pose substantial challenges to the existing dispatching technologies. In this paper, an auxiliary decision-making model through comprehensive utilization of multi-type active power adjustment resources is proposed. Firstly, the paper presents the framework of the auxiliary decision-making model. Then, the paper proceeds meticulously to establish the auxiliary decision-making model, including variables, the objective and constrains. Finally the validity of the model is verified using actual grid data from a specific region.

关键词： Solid modeling Uncertainty power supplies Decision making Dispatching Regulation power grids Security Synchronization Load modeling

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Intra-Day Rolling Optimal Strategy Considering Whole Dispatch Process and Multi-Type Adjustable Measures

Intra-Day Rolling Optimal Strategy Considering Whole Dispatc...

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IEEE International Conference on power and Energy Applications (ICPEA)

作者： Wenzhong Li Duanhong Zhang Xichen Tian Yan Lv Zhengqi Xu Jingfeng Liang State Grid Fujian Electric Power Dispatching and Control Center State Grid Fujian Electric Power Company Fuzhou China Beijing Key Laboratory of Research and System Evaluation of Power Dispatching Automation Technology China Electric Power Research Institute Beijing China

ISBN: (数字)9798350356113

ISBN: (纸本)9798350356120

The current electric power system practices hierarchical and zonal administration to facilitate more effective monitoring of grid safety and event management. With an escalating integration of new energy sources on the generation side, the intrinsically variable nature of these resources introduces substantial uncertainties into grid operations. Meanwhile, on the demand side, load profiles are diversifying further, significantly influenced by weather conditions, market price signals, or incentive schemes, thereby adding another layer of unpredictability. Against this context, this paper proposes an intra-day rolling optimal strategy considering whole dispatch process and multi-type adjustable measures. By synthesizing regulating resources from both the source and load sides, it undertakes a series of intra-day rolling optimization decisions across the entire dispatch workflow. This strategy aims to harmonize and optimize the allocation of various resources, thereby ensuring the secure and stable functioning of the electrical grid amidst the complexities introduced by the integration of intermittent renewables and the dynamics of diversified loads.

关键词： Renewable energy sources power measurement Uncertainty power supplies Process control Robustness Safety power system reliability Resource management Optimization

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HPDS133-bus:A Benchmark Test system for Distribution systems with High Penetration of Distributed Generation

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CSEE Journal of power and Energy systems 2023年第3期9卷 963-977页

作者： Fengzhang Luo Chongbo Sun Xin Yang Tianyu Zhang Chengshan Wang Jun Xiao Liangzhong Yao Lingzhi Zhu Minhui Qian Key Laboratory of Smart Grid of Ministry of Education Tianjin UniversityTianjin 300072China State Grid Economic and Technology Research Institute Co. Ltd.Changping DistrictBeijing 102209China Ultra High Voltage Company State Grid Henan Electric Power CompanyZhengzhou 450007China Economic and Technology Research Institute State Grid Tianjin Electric Power CompanyTianjin 300171China School of Electrical Engineering and Automation Wuhan UniversityWuhan 430072China China Electric Power Research Institute Xiaoying RoadBeijing 100192China

The benchmark test system for distribution systems is necessary and important for system analysis and result data *** order to meet the development demand of the distribution systems which integrate with a high penetration of distributed generation(DG),a benchmark test system for the distribution systems which adapts to current and future development trends is *** on the concentric zone theory and the typical regional settlement model in China,three typical distribution system scenarios corresponding to different system circle structures and regional development characteristics are designed in this *** order to adapt to the trend that the distribution systems will present the mixed state of AC and DC,a typical improvement scheme of distribution systems in urban scenario is *** benchmark test system of low-voltage distribution systems in a rural scenario is also designed because of the high penetration of ***,the system structure,load parameters,integrated capacity and output characteristics of varies types of DG in different scenarios are described in ***,the simulation results,such as the time series power flow,reliability evaluation and hosting capacity of DGs are *** benchmark test system proposed in this paper will lay a foundation for future research on distribution systems with a high proportion of DG and effectively support the distribution systems planning,design,operations and dispatches.

关键词： Benchmark test system distribution systems DG PV typical scenario

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Design of self-healing carbon-based hydrogels for wearable motion monitoring 10

Design of self-healing carbon-based hydrogels for wearable m...

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2023 10th International Conference on Advanced Manufacturing technology and Materials Engineering, AMTME 2023

作者： Li, Wen Zhu, Congcong Wang, Ping Tao, Luqi School of Electrical Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing400044 China School of Automation and Electrical Engineering University of Science and Technology Beijing Beijing100083 China

Conductive hydrogels have been extensively exploited in wearable medical monitoring, intelligent robotics, and human-machine interaction. Here, we construct an interpenetrating network of self-healing hydrogel using gelatine-modified carbon nanotubes (G/C) and polyvinyl alcohol (PVA) polymerization chains (given as PGC). A bonding agent, borax, was chemically cross-linked with PVA molecular chains to impart self-healing ability. The addition of G/C enhances the tensile behavior and conductivity of the hydrogels. With superior sensing capability and favorable biocompatibility, the PGC hydrogel described in this study offers valuable insights for developing ideal wearable strain sensors. © Published under licence by IOP Publishing Ltd.

关键词： Hydrogels

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