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

共 1326 条记录，以下是391-400 订阅

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Influence Analysis and Countermeasure Research of Dynamic Characteristics of Measurement System on Bridge Arm Current Differential Protection in MMC-HVDC System 18

Influence Analysis and Countermeasure Research of Dynamic Ch...

引用

18th International Conference on AC and DC power Transmission, ACDC 2022

作者： Chen, Qinlei Guo, Qi Lin, Xuehua Huang, Libin Li, Shuyong 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 Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System Guangzhou China CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (数字)9781839537615

ISBN: (纸本)9781839537615

Aiming at the action phenomenon of bridge arm current differential protection after AC fault recovery of a modular multilevel converter high voltage direct current (MMC-HVDC) project, the characteristics of differential current are *** influence of temporary block strategy and dynamic characteristics of measurement system on differential current are studied, and the mechanism of differential current and the reasons for the action of bridge arm current differential protection are revealed. Based on the real-time digital physics closed-loop simulation platform, the action phenomenon of bridge arm current differential protection in the field is reproduced and the influence of the dynamic characteristics of the measurement system on the bridge arm current differential protection of the bridge arm is analyzed. The optimization measures are proposed from two aspects: the dynamic performance of the measurement system and the configuration of bridge arm current differential protection. The research results provide technical support for the design of MMC-HVDC project and the impact assessment of dynamic performance of measurement system on MMC-HVDC protection. © ACDC 2022. All rights reserved.

关键词： Simulation platform

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Investigation of Near-Fundamental-Frequency Oscillation in a Renewable power Integrated System with MMC-HVDC Transmissions

Investigation of Near-Fundamental-Frequency Oscillation in a...

引用

IEEE Conference on Energy Internet and Energy System Integration (EI2)

作者： Xiaoyu Tian Wenkai Dong Wenhui Zhai Guixing Yang Pengpeng Kang Xiaorong Xie Power Dispatching Control Center State Grid Xinjiang Electric Power Co. Ltd Urumqi China State Key Laboratory of Power System Operation and Control (Department of Electrical Engineering) Tsinghua University Beijing China

ISBN: (数字)9798331523527

ISBN: (纸本)9798331523534

Near-fundamental-frequency oscillations (NFFOs) have been observed in practical renewable power integrated system via MMC-HVDC, of which the mechanism is not fully revealed yet. Therefore, in this paper, potential dominant influencing factors of the NFFO are explored based on a general renewable power integrated system at first. Then the equivalent circuit model of the system is built. By calculating the total resistance, the physical mechanism of the NFFO is revealed.

关键词： Damping Resistance Renewable energy sources Resonant frequency Energy Internet System integration Integrated circuit modeling Phase locked loops Oscillators Equivalent circuits

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Equivalent Impedance Modeling of LCC-HVDC control System Based on Transfer Function Method

Equivalent Impedance Modeling of LCC-HVDC Control System Bas...

引用

Energy, Electrical and power Engineering (CEEPE), International Conference on

作者： Yinsheng Su Runbin Cao Qingming Xin Huifan Xie Hongtao Liu Weihuang Huang Power Dispatching Control Center China Southern Power Grid Guangzhou China State Key Laboratory of HVDC Electric Power Research Institute China Southern Power Grid Guangzhou China

Aiming at the dc side resonance problem of line commutated converter based high-voltage dc transmission (LCC-HVDC) system, considering the effect of DC control system, an impedance modeling method of control system based on transfer function is proposed. The impedance model can be used to analyze the damping effects of constant current controller, constant voltage controller and constant extinction angle controller at different frequencies. Finally, the proposed method is applied to Xing 'an LCC-HVDC project. The results confirm that the constant current control at the rectifier side has resonance risk near a specific frequency, which verifies the effectiveness of the proposed modeling method for the assessment of DC control resonance risk. The influence of different measurement delay and filtering on impedance is analyzed, which can be used for the design and verification of LCC-HVDC control system.

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Inference Algorithm of Link Loss Rate Based on Network Resource Characteristics in Dynamic Carrier Network 11th

Inference Algorithm of Link Loss Rate Based on Network Resou...

引用

11th International Conference on Computer Engineering and Networks, CENet2021

作者： Liang, Yutu Fu, Jiajia Shi, Zhan Zhang, Keqin Electric Power Dispatching Control Center of Guangdong Power Grid Co. Ltd. Guangzhou510600 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9789811665530

The dynamic nature of the carrier network environment results in low accuracy of the link loss rate inference algorithm. To solve this problem, this paper proposes a link loss rate inference algorithm based on network resource characteristics in a dynamic carrier network environment. The algorithm includes the simplification of the detection routing matrix, the calculation of the number of links that need to be assumed to be no packet loss, the use of genetic algorithms to solve the optimal set of no packet loss links, and the solution of the column full-rank equation to obtain the packet loss rate of the link. In order to improve the efficiency of the genetic algorithm to solve the optimal solution, when constructing the initial population, the reliability of the link is analyzed from two aspects: historical data of link congestion and detection congestion contribution. The experimental results show that the algorithm in this paper improves the accuracy of the link loss rate and reduces the false alarm rate of the link loss rate. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Genetic algorithms

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Impact of Cyber Failure on Cyber-Physical Distribution System Reliability 6

Impact of Cyber Failure on Cyber-Physical Distribution Syste...

引用

6th International Conference on Energy, Electrical and power Engineering, CEEPE 2023

作者： Li, Yue Li, Xin Zhou, Yangjun Li, Shan Lu, Xin Guangxi Zhuang Autonomous Region Institute of Product Quality Inspection Nanning China Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Nanning China Aircraft Patrol and Live Work Center Guangxi Power Grid Co. Ltd Nanning China

ISBN: (纸本)9798350348279

With the rapid increasing of electricity customers, the structure complexity of cyber-physical distribution system (CPDS) has grown exponentially. As a result, the accurate and fast CPDS reliability assessment technology has aroused extensive research in the academic community. grid operators usually need quasi-real-time reliability assessment of CPDS when planning, operating and maintaining. For the purpose above, this paper proposes a high-performance reliability assessment method for CPDS based on continuous-time Markov chains (CTMC) considering impact of cyber failure, which can guaranteed assessment efficiency while maintaining computation accuracy. A medium voltage distribution system for RBTS Bus 5 is introduced as standard case to demonstrate the superiority of the proposed method indicating that the research in this paper has great engineering application value. © 2023 IEEE.

关键词： Failure (mechanical)

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Design of Energy Supply Device for Online Monitoring Equipment of power Transformer 5

Design of Energy Supply Device for Online Monitoring Equipme...

引用

5th International Conference on Renewable Energy and power Engineering, REPE 2022

作者： Chen, Liangyuan Tian, Bing Li, Dajian Jing, Maoheng Zhou, Ke Fan, Xiaopeng Wang, Xiaoming Zhang, Zihan Electric Power Research Institute of Guangxi Power Grid Co. Ltd. Guangxi Key Laboratory of Intelligent Control and Maintenance of Power Equipment Nanning China Digital Grid Research Institute China Southern Power Grid Joint Laboratory of Digital Grid Guangzhou China School of Automation China University of Geosciences Wuhan China

ISBN: (数字)9781665482066

ISBN: (纸本)9781665482066

During the routine inspection of devices in the existing power system, a series of parameters such as temperature, pressure, flow, and magnetic field must be obtained in time to ensure the security and stability of the system. Therefore, the stable operation of monitored devices in the system must be ensured. However, one of the key problems of the monitoring equipment in the system is the power supply problem, so this paper proposes a design method of the power supply device for the online monitoring equipment of the power transformer. The device is based on the law of electromagnetic induction, by cutting the magnetic induction line, the coil generates induced electromotive force;At the same time, the three-dimensional model of structural mechanics and two-dimensional axisymmetric model of magnetic field of the device were established by using simulation software. Finally, the effective value of the output voltage of the device is 3.9V and the output power is 14.45mW. The device has the advantages of simple structure, small size, simplicity and universality, which is conducive to the development of intelligent integrated monitoring system of transformer operation status, and improves the operation level of transformer to a certain extent. © 2022 IEEE.

关键词： Electromagnetic induction

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Advanced Out-of-Step Splitting Protection Simulation Platform with Considering High Frequency Generation Tripping and Low Frequency Load Shedding

Advanced Out-of-Step Splitting Protection Simulation Platfor...

引用

2022 IEEE International Conference on power Systems and Electrical Technology, PSET 2022

作者： Liu, Ren Zhu, Yukun Zhu, Yihua Chang, Dongxu Wu, Mingkang Huang, Libin a. State Key Laboratory of HVDC b. National Energy Power Grid Technology R&D Centre c. Guangdong Provincial Key Laboratory of Intelligent Operation and Control for New Energy Power System d. CSG Key Laboratory for Power System Simulation Electric Power Research Institute China Southern Power Grid Guangzhou China

ISBN: (纸本)9781665489157

This paper presents an advanced out-of-step (OOS) splitting protection simulation platform considering high frequency generation tripping and low frequency load shedding. In the proposed simulation platform, Real-Time Digital Simulator (RTDS) is utilized as the real-time power system simulator. Through the high-speed I/O card, real industry OOS splitting protection device is integrated into the proposed simulation platform. Based on the real China South power grid (CSG) control strategy, high frequency generation tripping and low frequency load shedding components are modelled in the simulation. CSG real grid is modelled in the RTDS to perform the Real-time hardware-in-the-loop simulation. Simulation results present that there is a clear difference between with high frequency generation tripping results and without high frequency generation tripping results. © 2022 IEEE.

关键词： Simulation platform

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Link Packet Loss Rate Inference Algorithm Based on Network Characteristics in Carrier Network 11th

Link Packet Loss Rate Inference Algorithm Based on Network C...

引用

11th International Conference on Computer Engineering and Networks, CENet2021

作者： Shi, Zhan Zeng, Ying Liang, Yutu Gong, Weichao Electric Power Dispatching Control Center of Guangdong Power Grid Co. Ltd. Guangzhou510600 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9789811665530

In the carrier network, the network noise is large, which leads to the low performance of the link packet loss rate inference algorithm. To solve this problem, this paper proposes a link packet loss rate reasoning algorithm based on network characteristics in carrier networks. The algorithm includes five steps: building a routing matrix, simplifying the routing matrix, calculating link characteristics according to network characteristics, building a column full-rank matrix, and solving equations to obtain the value of the packet loss rate of each link. In order to construct a full-rank matrix, the pass rate of each link is evaluated from the two dimensions of the pass rate estimation and the importance estimation of each link based on the network characteristics. In the experimental part, it is verified that compared with the existing algorithms, the algorithm in this paper improves the accuracy of the detection rate and pass rate of congested links, and reduces the misjudgment rate of congested links. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Inference engines

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Synchronization Stability of PLL-Based power Converters Connected to Weak AC grid 6

Synchronization Stability of PLL-Based Power Converters Conn...

引用

6th Asia Conference on power and Electrical Engineering, ACPEE 2021

作者： Mei, Limin Ding, Lei Wang, Zhihao Cai, Deyu Ding, Ran Wang, Jingran Xu, Haixiang Shandong University Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Jinan China State Grid Jibei Electric Power Company Limited Electric Power Dispatching and Control Center Beijing China

ISBN: (纸本)9781728191591

In this paper, the synchronization stability of converter system based on the phase-locked loop (PLL) is studied, especially when it is connected to a weak AC grid. First, the small signal model considered PLL, power control, current control and voltage feedforward (VFF) control is built. The open-loop transfer function can analyze the stability of the system but hides the dynamic of PLL. So the conjugated circuit is proposed, which describes the dynamics of PLL and the other part separately. Based on the Bode diagrams, we explore how the grid impedance and converter controller parameters influence the stability of the system. In order to verify the analysis results, simulations are conducted in MATLAB/Simulink. © 2021 IEEE.

关键词： Phase locked loops

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5G Green Communications: Multigroup Multicasting Transmission with SWIPT in C-RAN 11th

5G Green Communications: Multigroup Multicasting Transmissio...

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11th International Conference on Computer Engineering and Networks, CENet2021

作者： Zeng, Ying Lu, Jiangang Shi, Zhan Kang, Song Electric Power Dispatching Control Center of Guangdong Power Grid Co. Ltd. Guangzhou510600 China State Key Laboratory of Networking and Switching Technology Beijing University of Posts and Telecommunications Beijing100876 China

ISBN: (纸本)9789811665530

The work investigates the downlink multigroup multicast transmission in cloud radio access network (C-RAN), where remote radio heads (RRHs) collaboratively provide information and energy services for single-antenna information and energy receivers. We aim to minimize the total power consumption by designing beamforming vectors, subject to the constraints of data rate, fronthaul capacity and per-RRH transmit power. However, this optimization problem is nonsmooth and nonconvex. To overcome this challenge, a low-complexity algorithm is developed to find the nearly optimal solution, via successive convex approximation and smooth approximation techniques. Through numerical results, the impacts of the thresholds of fronthaul capacity and energy harvested on the optimum power consumption have been investigated. © 2022, The Author(s), under exclusive license to Springer Nature Singapore Pte Ltd.

关键词： Beamforming

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