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

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Research on Polygonal Harmonic Impedance Boundary Model for AC System and Resonant Impedance Calculation Method 5

Research on Polygonal Harmonic Impedance Boundary Model for ...

引用

5th International Conference on power and Energy Technology, ICPET 2023

作者： Li, Qing Xin, Qingming Chen, Qian Feng, Junjie Xu, ZhiHua Qin, Kang Qiu, Ziyue Electric Power Research Institute Csg Ehv Power Transmission Company Guangzhou China Electric Power Research Institute China Southern Power Grid State Key Laboratory of Hvdc Guangzhou China Ehv Power Transmission Company China Southern Power Grid Guangzhou China Power Dispatching Control Center China Southern Power Grid Guangzhou China

ISBN: (纸本)9798350339673

With the large-scale power electronic devices connected to the grid, the harmonic problem has become an important concern for the power system. The sector impedance or circular impedance boundary in traditional power system will increase the range of AC system harmonic impedance, polygonal impedance has become new choice for harmonic impedance boundary construction, but the method of polygonal harmonic impedance construction is not clear. In this paper, the construction methods of different polygonal harmonic impedance are studied, the different impedance construction and the influence on harmonic evaluation are compared, polygonal impedance construction method based on the sector boundary and resonant impedance calculation method are proposed. The polygonal harmonic impedance construction method proposed in this paper can be used more accurately for harmonic evaluation and reduce the capacity of filter devices, which is great significance for harmonic management of AC power grids. © 2023 IEEE.

关键词： Harmonic impedance polygonal impedance Resonant Impedance Sector impedance

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Study on Disturbance Propagation Characteristics of power grid and Evaluation of Temporal and Spatial Correlation Characteristics of Voltage Phase Trajectory 41

Study on Disturbance Propagation Characteristics of Power Gr...

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第41届中国控制会议

作者： Yibo Kong Changyou Feng Hongying Yang Liping Yan Key Laboratory of Intelligent Control and Decision of Complex Systems School of AutomationBeijing Institute of Technology Xinjiang Electric Power Research Institute of State Grid Xinjiang Electric Power Co. Ltd. National Electric Power Dispatching and Control Center of State Grid Corporation of China China Electric Power Research Institute

ISBN: (数字)9789887581536

ISBN: (纸本)9781665482561

With the access of large-scale new energy and power electronic equipment,as well as the influence of various random uncertain factors,the analysis and control of dynamic security of large power grids become particularly difficult,so it is of great practical significance to study the disturbance propagation characteristics of complex power *** is an important parameter that affects the security of power systems,and the voltage phase trajectory contains abundant power grid ***,based on the measured data,this paper quantitatively describes the characteristics of dynamic space-time distribution of the voltage,and numerically reveals the different influences of disturbance on different nodes and the characteristics of disturbance ***,the geometric characteristics of the measured voltage phase trajectory are mined,the new trajectory distance is defined,the characteristic trajectory plane is constructed,and the spatio-temporal evolution law of voltage phase trajectory is *** the sequel,through the density-based DBSCAN clustering method,the characteristic tracks of voltage movement are clustered and analyzed,and the temporal and spatial correlation characteristics of voltage movement trends of each node are measured,and the law of disturbance propagation is ***,based on the measured data of IEEE 39-bus system,the simulation analysis is carried out,and the effectiveness of the presented algorithm is verified.

关键词： Disturbance propagation Voltage phase trajectory Temporal and spatial correlation characteristics Trajectory clustering

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Impact assessment for large-scale off-grid of renewable energy on weakly interconnected systems 6

Impact assessment for large-scale off-grid of renewable ener...

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6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Li, Li Qin, Changlong Dong, Xin Qiao, Rongfei Yang, Jialun State Grid Jinan Power Supply Company Jinan China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9798350346671

Under the background of increasingly serious off-grid problems of renewable energy, this paper analyzes the impact of large-scale off-grid of renewable energy and voltage stability in the weakly interconnected system. First, an improved index is proposed based on Simpson formula for assessing transient voltage stability and achieving early warning of instability risk. Then, based on the simulation of a real-life UHV (Ultra-high voltage) weakly interconnected system, two typical cascading failure scenarios are reasonably anticipated. These cascading failures contain a series of renewable energy off-grid and blocking of DC transmission caused by different initial failures, whose voltage stability is evaluated by the proposed index. Besides, the nature of cascading failure evolution is analyzed. Finally, accuracy and efficient of the proposed index are verified. © 2023 IEEE.

关键词： Transients

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Preventive control Method of Improving Transient Voltage Stability for power System Based on the Attention of CNN

Preventive Control Method of Improving Transient Voltage Sta...

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2023 IEEE Sustainable power and Energy Conference, iSPEC 2023

作者： Li, Zhendong Yan, Jiongcheng Liu, Yutian Li, Li Qu, Hanbing The Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Jinan Power Supply Company Jinan China

ISBN: (纸本)9798350322699

The widespread integration of renewable generation and the changes in load structure bring significant challenges to the transient voltage stability of large-scale power systems. In order to achieve fast decision of preventive control for improving transient voltage stability, this paper proposes a preventive control method based on the attention of Convolutional Neural Network (CNN). An optimization decision model is established, which not only considers multiple traditional constraints but also introduces the model attention indicator based on Gradient-weighted Class Activation Mapping (Grad-CAM), enabling a more targeted improvement of transient voltage stability. The proposed indicator is capable of extracting the knowledge learned by CNN-based transient voltage assessment model, and utilizing it to guide the optimization decision-making of preventive control. Simulation results of provincial grid of eastern China demonstrate that the optimized control scheme can effectively enhance the transient voltage stability of power systems. © 2023 IEEE.

关键词： model attention indicator power system preventive control transient voltage stability

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Protocol Consistency Vulnerability Detection of UAV Wireless Communication Network in power Transmission and Transformation Project Based on Improved Genetic Algorithm 3

Protocol Consistency Vulnerability Detection of UAV Wireless...

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3rd International Conference on Green Communication, Network, and Internet of Things, CNIoT 2023

作者： Jiang, Shengchao Wang, Bin Zhuo, Haoze Li, Tailin Lv, Zecheng Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Nanning530023 China

ISBN: (纸本)9781510668867

The drone wireless communication network protocol is susceptible to the influence of URL (Unified Resource Locator) encoding conditions, resulting in a low vulnerability detection rate. Therefore, it is necessary to design a new protocol consistency vulnerability detection method for unmanned aerial vehicle wireless communication network based on improved genetic algorithm in power transmission and transformation engineering. A drone wireless communication network consistency vulnerability detection environment was configured, and an improved genetic algorithm was used to generate a protocol consistency vulnerability detection objective function for the wireless communication network. The objective function was solved and consistency vulnerability detection was completed. The experimental results show that this method has a high vulnerability detection rate, good detection effect, reliability, and certain application value in power transmission and transformation engineering. © 2023 SPIE.

关键词： Genetic algorithms

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Study of partial discharge electromagnetic wave signal leakage characteristics of transformer oil-paper insulated bushings

Study of partial discharge electromagnetic wave signal leaka...

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2022 International Conference on Renewable Energy and Electrical Technology, ICREET 2022

作者： Su, Yi Li, Dajian Lu, Yufeng Han, Fangyuan Zhang, Wei Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Nanning530023 China

In order to reasonably evaluate the effectiveness of UHF sensor arrangement in online monitoring of partial discharge of bushing, it is necessary to study the electromagnetic wave propagation characteristics of partial discharge UHF in the bushing. In this paper, a three-dimensional model of a real transformer bushing is established, the XFDTD software is used to simulate the raised seat defects and internal capacitive core defects of the bushing, field strength sensors are arranged at different locations inside and outside the bushing, and the propagation process of partial discharge UHF signals leaking from the oil-paper insulated bushing to the external free space is simulated and analyzed. The results show that the time difference between the signals received by the field strength sensors at different locations is not significant and can be neglected in practice. The partial discharge electromagnetic wave signal generated by the bushing elevated seat defect leaks from the upper porcelain sleeve to the external space, and the leaked electromagnetic wave energy is mainly gathered at the upper and lower ends of the upper porcelain sleeve. The partially discharged electromagnetic signal at the capacitor core inside the bushing will propagate along the coaxial waveguide structure formed between the capacitor screens towards the two ends of the capacitor core, the downward propagating electromagnetic wave energy is confined within the elevated seat, the upward propagating electromagnetic wave energy propagates from the top of the upper porcelain bushing to the external space, the leaked electromagnetic wave energy is mainly concentrated at the top of the upper porcelain bushing. The simulation results provide ideas for optimizing the arrangement of external antenna sensors for UHF detection of partial discharges in transformer oil-paper insulated bushings. © Published under licence by IOP Publishing Ltd.

关键词： Partial discharges

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Research on energy coordinated control strategy for offshore wind power based on distributed consistency algorithm 5

Research on energy coordinated control strategy for offshore...

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2023 5th International Conference on Energy, power and grid, ICEPG 2023

作者： Chen, Deyang Fan, Wei Liu, Yu Wang, Xinwei Sun, Tao System Analysis Department of Power Dispatching Control Center Guangdong Power Grid Co. Ltd Guangdong Guangzhou510000 China Guangdong Provincial Key Laboratory of Green Energy Technology South China University of Technology Guangdong Guangzhou510641 China

Offshore wind power is clean and has a large capacity, making it an important component of the development of new power systems. However, the randomness of offshore wind power affects the stability of the power grid. A coordinated control strategy of offshore wind power and multi-source energy based on a distributed consistency algorithm is proposed for offshore wind farms' energy coordination management and optimization. By constructing a source network storage load model and analyzing the output and load fluctuations of offshore wind power, energy storage, and power grid, the constraint equation and balance equation of source network load storage power are derived. An adaptive distributed consistency methodology is employed based on a proportional utilization micro growth function to preserve the stability of offshore wind power and the power grid. It can enhance the power distribution of offshore wind power, energy storage, and distribution networks. The outcomes of the simulation show that the suggested approach may quickly equalize power, decrease frequency variations of offshore wind power, and enhance the commercial viability of offshore wind power. © 2024 Institute of Physics Publishing. All rights reserved.

关键词： Electric power distribution

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A Transient Voltage Stability Preventive control Strategy for DC Receiving-end power System 8

A Transient Voltage Stability Preventive Control Strategy fo...

引用

8th International Conference on power and Renewable Energy, ICPRE 2023

作者： Tu, Lian Zhang, Shuiping Guo, Hengdao Bao, Bo Zhu, Yihua Zuo, Jian Power Dispatch and Control Center of Guangdong Power Grid Co. Ltd China Southern Power Grid 510000 China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid 510663 China National Energy Power Grid Technology R&D Centre 510663 China Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System 510663 China

ISBN: (纸本)9798350328813

With the increase of DC feed power and the decrease of the number of synchronous machines, receiving-end power system takes a serious threat to the transient voltage stability. Therefore, a transient voltage stability preventive control strategy for DC receiving-end power system is proposed in this paper. The whole method is decomposed into three sub-problems: transient voltage stability assessment, sensitivity computation and optimal control. A transient voltage stability index suitable for the sensitivity method is used to construct the transient voltage stability constraints. The accuracy and efficiency of the solution algorithm are improved by limiting the effective control interval of sensitivity and selection of the initial control set. The method has been applied in a provincial power grid in southern China. The results verifies the effectiveness of the proposed method. © 2023 IEEE.

关键词： DC receiving-end power system preventive control sensitivity transient voltage stability

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Microservice-based Fault Management Platform and Mechanism in power Communication Network

Microservice-based Fault Management Platform and Mechanism i...

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

作者： Kang, Zhongmiao Wu, Zanhong Zhang, Peiming Huang, Donghai 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

The power communication network uses SDN and NFV technology to improve the utilization of network resources, while bringing the characteristics of on-demand expansion and dynamic migration to the network. These new features pose new challenges to network fault management. To solve the problem that the existing research results lack an efficient fault management platform and mechanism for front-line maintenance personnel, this paper proposes a micro-service-based fault management platform and mechanism. Firstly, according to the technical composition and characteristics of the power communication network, the power communication network architecture is designed. Secondly, in order to make the network fault management mechanism programmable, fast adaptive, and dynamic, a fault management platform architecture based on microservices is designed according to the power communication network model, and the operation mechanisms of four business services, data collection, data processing, data analysis, and data view, are designed in detail. Finally, the feasibility of the platform and mechanism is analyzed from the four levels of the technical architecture. © 2023 IEEE.

关键词： Data handling

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Synchronization Stability Analysis of Wind Farms Integrated MMC-HVDC System

Synchronization Stability Analysis of Wind Farms Integrated ...

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2023 International Conference on power System Technology, powerCon 2023

作者： Li, Li Qin, Changlong Kan, Changtao Yang, Jialun Li, Guanqun State Grid Jinan Power Supply Company Jinan China Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China

ISBN: (纸本)9798350300222

High-voltage direct current (HVDC) based on modular multilevel converter (MMC) is an efficient way to integrate wind farms. However, following short-circuit fault on transmission line, wind turbines (WTs) may lose synchronization with sending-end MMC. As a result, delivery and consumption of wind power are under risk. This paper investigates the mechanism of synchronous instability of wind farm integrated MMC-HVDC system under the severe grid faults. First, a synchronization stability model of the whole is stablished, the existing of stable equilibrium points (SEPs) and the damping characteristic of the whole system are analyzed. Then, a synchronization stability enhancement strategy is proposed based on the coordination of WT and MMC. Last, the effectiveness of proposed strategy is verified by time-domain simulation. © 2023 IEEE.

关键词： Transient analysis

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