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检索条件"机构=Key Laboratory of Intelligent Dispatching and Control of Power Grid"

共 1317 条记录，以下是211-220 订阅

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Blockchain-based High-reliability Recovery and Verification Mechanism for power Data Storage Nodes

Blockchain-based High-reliability Recovery and Verification ...

引用

2023 IEEE International Symposium on Broadband Multimedia Systems and Broadcasting, BMSB 2023

作者： Kang, Zhongmiao Huang, Donghai Bao, Yubeng Wu, Zanhong Liu, Chang Guangdong Power Grid Co. Ltd. Electric Power Dispatching Control Center Guangzhou China Beijing University of Posts and Telecommunications State Key Laboratory of Networking and Switching Technology Beijing China

ISBN: (纸本)9798350321524

To solve the problem of low utilization of power data storage resources, this paper proposes a high-reliability recovery and verification mechanism for power data storage nodes based on blockchain. In this mechanism, during the restoration process of power data storage nodes, participants include nodes to be restored, restoration nodes, and other nodes. The mechanism includes three steps: the node to be recovered sends a data recovery request and is verified, the data is recovered, and the data is verified as a whole. In the data recovery step, the node to be recovered and the recovery node adopt the mechanism of data block transmission and verification to transmit and verify the data block by block. In the step of verifying the entire data, when the node to be restored obtains all the data from the restored node, the MD5 overall verification strategy is adopted to verify the data. In the performance analysis part, through the reliability analysis of the two steps of recovery check and recovery response, it is verified that the data recovery mechanism proposed in this paper has high reliability. © 2023 IEEE.

关键词： Recovery

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Study on Influencing Factors of Bidding Strategy in power Market 6

Study on Influencing Factors of Bidding Strategy in Power Ma...

引用

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

作者： Cai, Xinlei Liu, Jiale Meng, Zijie Cheng, Zhangying Li, Ke Pan, Tingzhe Power Dispatching and Controlling Center of Guangdong Power Grid Company Limited Guangdong China Inst. of Measurement Technology China Southern Power Grid Electric Power Research Institute CO. Ltd P.R. Guangdong Prov. Key Laboratory of Intelligent Measurement and Advanced Metering of Power Grid Guangdong China

ISBN: (纸本)9798350312690

With the continuous and in-depth reform of the domestic electricity market, a large number of electricity-selling companies participate in the competition of the electricity market. To enhance the core competitiveness of power-selling companies and reduce their operational risks, it is necessary to analyze the factors that affect the bidding decisions of power-selling companies, so that formulates reasonable bidding strategies and promotes the benign development of the company. Therefore, according to combing and summarizing the relevant literature, this paper analyzes the factors that affect the bidding strategy of power sales companies from four perspectives, i.e., operating objectives, policies and systems, market risks, and internal conditions of power sales companies, and constructs an evaluation system of influencing factor indicators. Finally, the analytic hierarchy process (AHP) modified based on the entropy weight method is applied for example analysis. By determining the weight of indicators at all levels, the ranking of factors affecting the bidding strategy of power-selling companies is obtained, with a view to providing a reference for power-selling companies to formulate bidding strategies suitable for their own development. © 2023 IEEE.

关键词： Analytic hierarchy process

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Study on current carrying capacity calculation model for dynamic capacity increase of carbon fiber reinforced composite core conductor 3

Study on current carrying capacity calculation model for dyn...

引用

2024 3rd International Conference on Green Energy and power Systems, ICGEPS 2024

作者： Feng, Bo Zhang, Wei Liao, Yongli Xia, Xiaofei Zhang, Hourong Guangxi Power Grid Engineering Technology Research Center of Equipment Monitoring and Diagnosis Electric Power Research Institute of Guangxi Power Grid Company Nanning530013 China Guangxi Key Laboratory of Intelligent Control Operation and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Company Nanning530013 China Electric Power Research Institute China Southern Power Grid Company Guangzhou510663 China

With the "dual-carbon"as the goal of the new power system construction gradually in-depth, transmission lines must have energy-saving capacity for the direction of development. A new type of large-capacity overhead transmission conductor is the carbon fiber reinforced composite core (CFCC) conductor. The conductor has high capacity, low loss, high-temperature resistance, low high-temperature sag, and other characteristics. It is one of the key technologies and equipment applied to the transformation of old overhead transmission lines to enhance its capacity. At the same time, it can also realize the dynamic transmission capacity regulation of the overhead line. The application of the prospect is very promising. The accurate assessment and calculation model for the conductor's allowable current carrying capacity is the key core technical problem of the overhead transmission line dynamic capacity increase capability. The paper establishes a maximum allowable current capacity calculation model for carbon fiber-reinforced composite core conductors based on Morgan's formula. The results of the load flow calculation are compared with the actual load flow test results to verify the calculation model, and the maximum error is 3.59%, which proves the reliability of the calculation model. On this basis, the influence of external environmental factors (ambient temperature, sunlight intensity, wind speed, and direction) on the maximum allowable current capacity of the conductor is discussed. The correlation coefficient of the model is analyzed. © Published under licence by IOP Publishing Ltd.

关键词： Overhead lines

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Research on active power control strategy for offshore wind power based on multiple time scales 3

Research on active power control strategy for offshore wind ...

引用

3rd International Conference on Energy, power and Electrical Technology, ICEPET 2024

作者： Qin, Yingjie Fan, Wei Chen, Deyang Yang, Cheng Li, Fengneng Guangdong Power Grid Co. Ltd System Analysis Department of Power Dispatching Control Center Guangdong Guangzhou510000 China South China University of Technology Guangdong Provincial Key Laboratory of Green Energy Technology Guangdong Guangzhou510641 China

ISBN: (纸本)9798350352658

The centralized control of offshore wind power cannot quickly balance the difference between source and load power, resulting in significant frequency fluctuations. A multi time scale based active power control strategy for offshore wind power loads is proposed. Establish different time measurement scales to measure relevant data such as load side power, grid power, offshore wind turbine power, and energy storage state of charge. Taking the shortfall cost caused by power fluctuations on the load side as the control objective in the long time scale, and the current electricity cost and average electricity price as the control objectives in the short time scale, a multi-time scale objective function is constructed to accurately and quickly allocate power to ensure the smooth operation of offshore wind power. The simulation results confirm that the proposed strategy reduces frequency fluctuations and improves the reliability of distribution network operation. © 2024 IEEE.

关键词： active power multiple time scales offshore wind power state of charge

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Multi-Objective Coordination and Stability control of High Proportion Wind power System Based on K-Domain Tuning Damping 19th

Multi-Objective Coordination and Stability Control of High P...

引用

19th Annual Conference of China Electrotechnical Society, ACCES 2024

作者： Zhang, Qingtao Gao, Diju Zhang, Dan Cai, Haiqing Gu, Haohan Chen, Wei Wu, Wencong Chen, Zhihao Institute of Logistics Engineering Shanghai Maritime University Shanghai China Institute of Logistic Science and Engineering Shanghai Maritime University Shanghai China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China National Energy Power Grid Technology R&D Centre Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9789819608966

With the further development of "double high" characteristics of power system, the traditional stability problem dominated by synchronous generator has gradually evolved into a new stability problem dominated by power electronic equipment control. In addition, different types of failure problems can occur in wind power systems. In order to achieve multi-objective coordinated and stable operation of high proportion wind power system, a damping control method with parameters tuning is proposed, which includes the design of filtering link and proportional amplification link. Among them, the key parameters of the proportional link are adjusted. Finally, the feasibility of the proposed control method is verified by simulation tests. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Electric power system stability

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Distance Protection Setting Scheme for the Loss of Main Protection in High-Voltage power grid

Distance Protection Setting Scheme for the Loss of Main Prot...

引用

2023 International Conference on power System Technology, powerCon 2023

作者： Zhang, Yongjie Cong, Wei Tang, Yi Li, Yudun Li, Congcong Wang, Anning Shandong University Key Laboratory of Power System Intelligent Dispatch and Control Jinan China State Grid Shandong Electric Power Company Jinan China State Grid Shandong Electric Power Research Institute Jinan China

ISBN: (纸本)9798350300222

With the continuous construction and development of high-voltage power grids, strategies such as dual redundancy configuration of main protection have been proposed successively to ensure reliable operation of the protection. However, certain abnormal conditions, such as loss of communication power supply, failure of both main protection channels, total station DC power loss (due to fire, etc.), theoretically cannot be completely ruled out in terms of their potential occurrence. According to the power system operation regulations, when the main protection is lost, it is necessary to trip the line, which affects the normal operation of the power grid and disrupts production and daily life. Therefore, a distance protection setting scheme for the loss of main protection in high-voltage power grids has been proposed. When abnormal operating conditions occur, the proposed scheme defines the emergency protection boundary and identifies the protective devices that require protection value modifications. Following the proposed principles, necessary adjustments will be made to the setting values of these protective devices. Using PSCAD/EMTDC to construct a simulation model, the simulation results demonstrate that the proposed distance protection setting scheme in this paper does not require additional protective devices and effectively ensures the safe operation of the power grid under abnormal operating conditions. © 2023 IEEE.

关键词： Electric power system protection

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Prediction of Transformer Winding Performance Under Short Circuit Impulse 19th

Prediction of Transformer Winding Performance Under Short Ci...

引用

19th Annual Conference of China Electrotechnical Society, ACCES 2024

作者： Xu, Shufeng Chen, Liangyuan Yu, Xiaobo Luo, Chuansheng Su, Zhengyuxi Huang, Lei Nanning Power Supply Burea Nanning530031 China Electric Power Research Institute of Guangxi Power Grid Corporation Co. Ltd. Nanning530023 China Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Nanning530023 China

ISBN: (纸本)9789819613823

This article introduces a transformer test prototype with a mouth-shaped iron core and a double-column structure. Each column contains three coils: low-voltage inner, high-voltage, and low-voltage outer. These two low-voltage coils can simulate the amplitude and axial deformation of real transformer coils. The article first uses simulations to predict the short-circuit withstand current and failure mode of windings under short-circuit impulse. Based on these results, tests were conducted on the model transformer to study the deformation and failure process of the two low-voltage coils. Multiple short-circuit impulse tests were conducted on the coils of the model transformer, during which the short-circuit impedance of the transformer were measured and analyzed. The experimental results show that the short-circuit impedance of the transformer increases monotonically with the increase of the number of shocks, and there will be a sudden increase in short-circuit impedance after a certain shock, indicating that irreversible permanent deformation has occurred at this time. The disassembly inspection of the model transformer after the experiment verified the experimental effect, indicating that the change rate of the transformer’s short-circuit impedance can effectively reflect the deformation of the coil, making it a comparatively effective method for predicting the transformer’s short-circuit resistance capability. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： Transformer windings

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Mobile Observation Point Calculation and Meter Reading Based on the Digital Twin Model of Substations 24

Mobile Observation Point Calculation and Meter Reading Based...

引用

2024 International Conference on Industrial Automation and Robotics, IAR 2024

作者： Zhang, Yubo Zhang, Wei Lu, Yufeng Liu, Xu Huang, Chengwei Electric Power Research Institute of Guangxi Power Grid Co. Guangxi Key Laboratory of Intelligent Control and Operation and Maintenance of Power Equipment Guangxi Nanning China Electric Power Research Institute of Guangxi Power Grid Co. Guangxi Nanning China Southern Power Grid Research Institute Co. Ltd. Guangdong Guangzhou China Hezhou Power Supply Bureau of Guangxi Power Grid Co. Ltd. Guangdong Hezhou China

ISBN: (纸本)9798400711268

With the development of the power system, the number of substation equipment continues to increase, and the use of intelligent mobile robots to replace traditional manual inspection methods is a trend, which can improve inspection efficiency and stability, and reduce the operation and maintenance costs of substations. However, in the current mobile robot inspection process, to ensure that meter readings are not affected by factors such as lighting and the observation angle of the gimbal, operators need to pre-adjust the corresponding observation points for each device to be observed, resulting in a significant workload for debugging. To reduce the extensive debugging time invested by staff in the early stages, this paper proposes a method for robot meter reading without preset positions based on a digital twin model of the substation. The positions of equipment are marked in the digital twin model and sent to the mobile robot, which then calculates the optimal observation route autonomously. An RGBD camera is used to obtain the point cloud of the meter, and the normal vectors of the point cloud are extracted to calculate the corresponding optimal observation position and gimbal angle. Subsequently, image processing methods are employed to obtain the meter reading. Finally, the experiment results show that the proposed method can reduce the workload of manual debugging in substation inspection and improve the stability and accuracy of meter readings. © 2024 Copyright held by the owner/author(s).

关键词： Mobile robots

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A Method for Solving Transformer Load Eigenvalues and Weights 10

A Method for Solving Transformer Load Eigenvalues and Weight...

引用

10th International Forum on Electrical Engineering and Automation, IFEEA 2023

作者： Li, Rui Zhang, Lei Chen, Liangyuan Zhao, Jian Electric Power Research Institute of Guangxi Power Grid Co. Ltd Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Guangxi Power Grid Equipment Monitoring and Diagnosis Engineering Technology Research Center Nanning China

ISBN: (纸本)9798350309379

This thesis discloses a method for solving transformer load eigenvalues and weights, comprising processing of transformer load data, load analysis, extraction of eigenvalues, and solving for weights. The load analysis includes fitting algebraic polynomials of functions, residual plot validation, and F and R tests. Due to the diversity and time-varying nature of transformer loads, which leads to increased transformer losses, the analysis of transformer loads is carried out to solve this problem. Due to the complexity of the time-varying nature and diversity, there is no good solution at home or abroad, and there are disadvantages such as low accuracy, complex methods and relying mainly on the subjective judgement of the decision maker. The analysis of the load lies mainly in the analysis of eigenvalues and weights, and the method in this thesis starts with these two parts of the analysis in a simple way, using residual plots, F and R tests to assist in validating the algebraic polynomial of the fitted function to improve accuracy. The extracted eigenvalues best represent the stable value of output power in that typical subinterval as the mean of the load data. The use of a comprehensive subjective and objective weighting method takes into account the subjective judgement of the decision maker, supplemented by practical experience and combined with the actual situation, but also allows for objectivity, based on a solid foundation of mathematical model theory, so that subjectivity and objectivity are combined to ensure the reliability and practicality of the weights The weights in the method of this thesis refer to the proportion of the eigenvalues within each typical subinterval that are within the overall interval. © 2023 IEEE.

关键词： Load Eigenvalues low accuracy proportion

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Modeling method of transformer sensor communication model based on intelligent algorithm 10

Modeling method of transformer sensor communication model ba...

引用

10th International Forum on Electrical Engineering and Automation, IFEEA 2023

作者： Yi, Chenying Zhou, Yangjun Electric Power Research Institute of Guangxi Power Grid Co. Ltd Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Guangxi Power Grid Equipment Monitoring and Diagnosis Engineering Technology Research Center Nanning China

ISBN: (纸本)9798350309379

In this paper, a modeling method of sensor communication model of distribution transformer based on intelligent algorithm is studied. By this method, the reliability of distribution transformer can be improved, thus the reliability of distribution network with distributed energy access can be improved. This paper includes communication model establishment and solution, improved communication model establishment, improved communication model solution, improved communication model verification and comparison. As the test time becomes longer, the sensor itself will heat up, which will lead to the temperature rise of the surface and its surrounding environment. The traditional communication model does not take these excellent factors into account, and ignores the AC characteristics based on the DC characteristics. The improved communication model of the method in this paper takes into account the influence of temperature, taking into account both DC characteristics and AC characteristics, and accurately calculates the use limit temperature of the sensor, thus improving the reliability. The methods of error and goodness-of-fit test show that the method is far superior to the traditional methods. © 2023 IEEE.

关键词： Distributed energy access Distribution transformer Establishment of communication model Genetic algorithm Reliability of distribution network

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