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检索条件"机构=State Key Laboratory of Control and Simulation of Power System and Power"

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A power Grid Accident Early Warning Method Considering Multi-factor Coupling 17th

A Power Grid Accident Early Warning Method Considering Multi...

引用

17th Annual Conference of China Electrotechnical Society, CES 2022

作者： Hu, Liangping Cong, Wei Xu, Anxin Wei, Zhen Han, Aoyang An, Shuhuai Key Laboratory of Power System Intelligent Dispatch and Control Shandong University Jinan Shandong China Rizhao Power Supply Company Shandong Electric Power Company State Grid Shandong Rizhao China Qingdao Power Supply Company Shandong Electric Power Company State Grid Shandong Qingdao China

ISBN: (纸本)9789819903566

The power grid is an important infrastructure for the development of the national economy and society. It is of great significance to carry out research on the early warning method of power grid accidents to ensure the safe and stable operation of the power grid. In this paper, a power grid accident early warning method considering multi-factor coupling is proposed, based on conditional deep convolutional generative adversarial networks to generate minority class samples to achieve dataset balance. The depth features of the two-dimensional input samples were extracted by using a deep convolutional autoencoder network for the three types of disaster factors: meteorology, equipment and geographical environment. A deep self-encoding network is constructed, and the deep feature splicing of three types of disaster-causing factors is used as input, and a softmax classifier is added to the output layer of the network to construct a multi-factor coupled power grid accident early warning model to realize the prediction and early warning of power grid accidents. Numerical simulations verify the effectiveness and accuracy of the method proposed in this paper. © 2023, Beijing Paike Culture Commu. Co., Ltd.

关键词： Numerical methods

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Study on partial discharge of transformer based on wide frequency equivalent circuit 8

Study on partial discharge of transformer based on wide freq...

引用

8th IEEE International Conference on Energy Internet, ICEI 2024

作者： Jiang, Changming Zhou, Yuanxiang Li, Ping Tang, Yunpeng He, Zhiyang Li, Huan Chen, Jianning Mu, Ka State Grid Corporation of China North China Branch Bejing China Tsinghua University State Key Laboratory of Power System Operation and Control Department of Electrical Engineering Bejing China State Grid Corporation of China Bejing China Electric Power Research Institute of State Grid Jibei Electric Power Company Limited Bejing China

ISBN: (纸本)9798331523558

When partial discharge occurs in the transformer, it will produce higher frequency pulse current, high frequency phenomenon will enhance the circuit capacitance effect, making the circuit bandwidth, in order to detect the local discharge signal so as to realize the transformer for equipment monitoring, the establishment of the transformer broadband equivalent circuit model, the propagation law of partial discharge pulse current signal in the transformer is investigated, and the effects of four denoising methods are compared under different evaluation indexes;finally, a typical transformer partial discharge condition is studied, and the validity of the transformer partial discharge research based on the wide-band equivalent circuit is verified. © 2024 IEEE.

关键词： Partial discharges

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Optimization Method of Shared Energy Storage Configuration on Source-Grid-Load Side of power system

Optimization Method of Shared Energy Storage Configuration o...

引用

2023 International Conference on power system Technology, powerCon 2023

作者： Li, Cuiping Liu, Yang Zhang, Tianxun Zhao, Zhiqiang Liu, Haojun Zhu, Xingxu Li, Zhi An, Chenyu Li, Junhui Northeast Electric Power University Key Laboratory of Modern Power System Simulation and Control & Renewable Energy Technology Ministry of Education Jilin132012 China Beijing Technology and Business University Beijing China State Grid Hami Power Supply Company Xinjiang Uygur Autonomous Region Hami Hami839000 China

ISBN: (纸本)9798350300222

With the rise of the application of sharing economy in various fields of power system, As a typical application of shared economy in the field of energy storage, the optimal allocation of shared energy storage on the source-network-load side has been a great topic. The problem dealt with in this paper is the configuration result of the source-grid-load energy storage system under the same control strategy. This paper designs an optimization method for the source-network-load side configuration of generalized shared energy storage in regional power grid: Firstly, according to the extensional usage scenario and demand of energy storage, the alternative set of shared energy storage configuration is constructed. Secondly, based on the profit model of shared energy storage, a power system source-network-load optimization scheduling strategy is proposed. Finally, a numerical example is carried out to prove the feasibility and efficacy of the suggested method. © 2023 IEEE.

关键词： Profitability

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The simulation Analysis and Countermeasures of LCC-HVDC Complementary Resonance 5

The Simulation Analysis and Countermeasures of LCC-HVDC Comp...

引用

2023 5th International Conference on Energy systems and Electrical power, ICESEP 2023

作者： Su, Yinsheng Liu, Zhijiang Chen, Deyang Xie, Huifan Lin, Xuehua Liu, Hongtao Power Dispatching Control Center of China Southern Power Grid Guangdong Guangzhou510663 China Electric Power Research Institute of China Southern Power Grid Guangdong Guangzhou510663 China State Key Laboratory of DC Transmission Technology Guangdong Guangzhou510663 China Key Laboratory of Guangdong New Energy Power System Intelligent Operation and Control Enterprise Guangdong Guangzhou510663 China

With the advancement of HVDC technology, the AC/DC hybrid grid has gradually emerged. The interaction and influence between AC and DC have become increasingly prominent, with the complementary resonance problem between AC and DC emerging as a hot research topic. In this paper, firstly, the phenomenon of LCC-HVDC complementary resonance is analyzed in both time and frequency domains, and a method for setting the saturation curve of the converter transformer in time domain simulation is proposed. Subsequently, targeting the actual LCC-HVDC complementary resonance, a hardware-in-loop simulation platform is constructed based on the actual HVDC control and protection equipment, and the actual field complementary resonance is reproduced. By simulating different operation modes, the operation range with a low risk of complementary resonance is determined. The influencing factors of complementary resonance are discussed and analyzed. Finally, through real-time simulation, the results show that the simulation method proposed in this article for setting the saturation curve of the converter transformer can accurately reflect the complementary resonance phenomenon between AC and DC caused by the saturation of the converter transformer. The countermeasures proposed in this article can effectively remove the complementary resonance between AC and DC and have been applied to the operation and control of actual power grids. © 2023 Institute of Physics Publishing. All rights reserved.

关键词： Time domain analysis

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Research and design of dual band microstrip filter 20

Research and design of dual band microstrip filter

引用

20th International Conference on Optical Communications and Networks, ICOCN 2022

作者： Zheng, Xuemei Zhou, Zhenxing Key Laboratory of Modern Power System Simulation and Control Renewable Energy Technology Jilin China School of Electrical Engineering Northeast Electric Power University Jilin China

ISBN: (数字)9781665458986

ISBN: (纸本)9781665458986

With the reduction of spectrum resources available in modern communication, higher requirements are put forward for the out of band suppression, frequency selection characteristics and signal-To-noise ratio of the filter. Based on the traditional stepped impedance resonator, a microstrip multifrequency filter based on open branch loaded stepped impedance resonator is designed and implemented in this paper. © 2022 IEEE.

关键词： Microstrip filters

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Design and optimization of mini MIMO antenna 20

Design and optimization of mini MIMO antenna

引用

20th International Conference on Optical Communications and Networks, ICOCN 2022

作者： Zheng, Xuemei Ma, Long Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Jilin China School of Electrical Engineering Northeast Electric Power University Jilin China

ISBN: (数字)9781665458986

ISBN: (纸本)9781665458986

This article designs three MIMO antennas for WLAN and WIMAX. The center resonance frequencies are 2.4 GHz, 3.5 GHz, and 5.2 GHz, respectively. The electromagnetic simulation software HFSS is used to design and optimize the MIMO antenna. The MIMO antenna is designed with dielectric substrates with different thicknesses and sizes and antenna element patches with different shapes. Use the antenna layout in each frequency band to obtain good isolation. Make the center working frequency reach more than 15dB. The antenna has the characteristics of omnidirectional radiation in the working frequency band, and the isolation and gain are calculated through the S parameter sweep frequency setting, and then the optimization function is used to optimize and modify the antenna. © 2022 IEEE.

关键词： Electromagnetic simulation

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A Model-driven Early Warning Approach for Transmission Lines Failure under Wind Storms

A Model-driven Early Warning Approach for Transmission Lines...

引用

2023 IEEE Sustainable power and Energy Conference, iSPEC 2023

作者： Chen, Haoran Bai, Shibin Tian, Zhihao Liu, Gang Li, Changgang Ni, Qiulong Wu, Chang Key Laboratory of Power System Intelligent Dispatch and Control of Ministry of Education Shandong University Jinan China State Grid Ningxia Electric Power Corporation Yinchuan China State Grid Zhejiang Electric Power Corporation Hangzhou China State Grid Quzhou Power Supply Corporation Quzhou China

ISBN: (纸本)9798350322699

The frequency and intensity of extreme wind storm events are gradually increasing due to global climate change, posing serious challenges to the security and stability of the power grid. Under this background, this paper proposes a model-driven early warning approach for transmission lines failure under wind storms. The mapping relationship between wind speed and line failure probability is established. Risk assessment is carried out for scenarios with high failure probabilities, and the early warning information is released. Case study is conducted based on the New England 39-bus system, and the issued early waring information can offer decision-making references for dispatchers during the storm. © 2023 IEEE.

关键词： early warning model-driven power grid risk assessment transmission line wind storms

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Fault Diagnosis of UHVDC Transmission system Based on Gated Recurrent Unit

Fault Diagnosis of UHVDC Transmission System Based on Gated ...

引用

2023 Panda Forum on power and Energy, PandaFPE 2023

作者： Ren, Yiming Yuan, Shuai Cheng, Gong Zhao, Qingsheng Wang, Lei Liang, Dingkang Yuan, Minhong Taiyuan University of Technology Shanxi Key Laboratory of Power System Operation and Control Taiyuan China State Grid UHV Transmission CO.OF SEPC State Grid Power Supply Company Taiyuan China State Grid Power Supply Company Taiyuan China

ISBN: (纸本)9798350321173

The traditional method for detecting and classifying different types of faults in Ultra High Voltage Direct Current (UHVDC) has low accuracy rate and does not sufficiently exploit the information of timing characteristics in the electrical quantity signals, making it difficult to identify some system faults and measurement faults. This paper presents a fault diagnosis strategy which is based on Gated Recurrent Unit (GRU) to overcome these shortcomings. The study investigates three key GRU training factors, namely the amount of network layers, learning rate, and batch size, which may affect the training effect of GRU. And several sets of experiments are designed to determine the most suitable GRU network parameters. The classification effect of GRU is compared with that of RNN and LSTM, and the experimental results illustrate the high diagnostic accuracy of this approach. In addition, the method does not need to transform the data and can use the initial 1D time-series data as the network input, avoiding the loss of valid information and reducing the complexity of the fault diagnosis process. © 2023 IEEE.

关键词： Failure analysis

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Design of dual band microstrip antenna based on electromagnetic band gap structure 20

Design of dual band microstrip antenna based on electromagne...

引用

20th International Conference on Optical Communications and Networks, ICOCN 2022

作者： Zheng, Xuemei Tang, Longfei Key Laboratory of Modern Power System Simulation and Control and Renewable Energy Technology Jilin China School of Electrical Engineering Northeast Electric Power University Jilin China

ISBN: (数字)9781665458986

ISBN: (纸本)9781665458986

Because the antenna is an important passive component in the RF front-end of mobile communication, some studies have found that the combination of EBG and antenna can effectively improve the performance of the antenna. In this paper, a dual band microstrip antenna based on EBG structure is designed, which improves the gain of the antenna, and the resonant frequencies are 2.4 GHz and 3.5 GHz. After simulation, the return loss at two resonant frequencies is less than-19.5 dB, which basically meets the design requirements. © 2022 IEEE.

关键词： Natural frequencies

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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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