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检索条件"机构=1State Key Laboratory of Advanced Electromagnetic Engineering and Technology"

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Research on Voltage Stabilizing System of Switched Reluctance Motor Based on Fuzzy PID Control 27

Research on Voltage Stabilizing System of Switched Reluctanc...

引用

27th International Conference on Electrical Machines and Systems, ICEMS 2024

作者： Chang, Tong Wang, Shuanghong Li, Zixin School of Electrical and Electronic Engineering Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Technology Wuhan430074 China

ISBN: (纸本)9784886864406

This paper proposes a control strategy based on fuzzy PID control of Switched Reluctance Motor Generator (SRMG) in response to the voltage fluctuation issues caused by load variations in switched reluctance motor system. This strategy is constructed based on the fundamental principles of closed-loop control and fuzzy control theory, incorporating a parameter-adaptive fuzzy PID controller and system model. Initially, a switched reluctance motor system was constructed to obtain voltage fluctuation data. Subsequently, aiming for voltage stabilization, a control algorithm for SRMG under constant speed mode was designed using the fuzzy PID controller, adopting a dual closed-loop control strategy for speed and current. Finally, compared with conventional PID control, the fuzzy PID controller was shown to effectively improve response speed, reduce voltage overshoot, and decrease voltage fluctuation time, demonstrating superior voltage stabilization performance. © 2024 The Institute of Electrical Engineers of Japan.

关键词： Three term control systems

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Dynamic Evolution of CS and Its Effects on Charged Particles in Vacuum Arc 7

Dynamic Evolution of CS and Its Effects on Charged Particles...

引用

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

作者： Liu, Shan Yuan, Zhao Liu, Liming Chen, Lixue Ya, Penglong Pan, Yuan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350345094

CS emits plasma and metal vapor towards the arc gap, which influences the interruption of VCB. In order to analyze the dynamic evolution of CS and its effect on charged particles, the observation experiments of CS and charged particles were carried out. Using cup-shaped electrode of AMF, the dynamic pictures of CS in the diffusion is shot by high-speed camera, and the distribution of CS is observed. The CS is identify by Matlab software, and the diameter, diffusion rate and quantity of the CS are obtained. The dynamic evolution of them with different breaking conditions is analyzed. The characteristic parameters of charged particles were diagnosed by colorimetric method. The 2D spatial distribution was obtained. The results indicate that the change of the quantity of CS with time is consistent with that of current waveform. The rise in the quantity of CS is related to the diffusion and split of the spots. It is observed that the evolution of CS on the electrode is not completely uniform. At the more radial outward position of the electrodes, the distance between CS is greater. The diameter and diffusion rate of CS are not constant. It is observed that charged particles density decays and fluctuates radially, and the temperature increases along the radial direction. This is related to the evolution of CS. © 2023 IEEE.

关键词： High speed cameras

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Analysis and Suppression of Harmonic Oscillation Caused by Active Power Filter with Magnetic Flux Compensation 3

Analysis and Suppression of Harmonic Oscillation Caused by A...

引用

3rd IEEE International Conference on Electronic technology, Communication and Information, ICETCI 2023

作者： Pan, Wenhao Li, Dayi Yang, Xiao Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350398410

The active power filter with magnetic flux compensation can suppress the influence of background harmonics and load harmonics by increasing the harmonic impedance of the system. Flux compensated adjustable impedance is the key part of active power filter, which can increase the harmonic impedance without affecting the fundamental impedance. With the traditional compensation method, the adjustable impedance contains a negative resistance component in the frequency band between the fundamental and the harmonics, which may interact with the load impedance and cause the system resonance. After establishing a general mathematical model of adjustable impedance and system equivalent admittance, this paper analyzes the resonance mechanism, oscillation characteristics and key influencing factors of the harmonic oscillation. The damping suppression strategy is proposed to successfully eliminate the resonance while maintaining good harmonic suppression performance. The correctness of the analysis and the effectiveness of the suppression method are verified by simulation and experiment. © 2023 IEEE.

关键词： Damping

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Signature Identification of False Data Injection Attacks Based on Deep Vision Networks

Signature Identification of False Data Injection Attacks Bas...

引用

2024 IEEE China International Youth Conference on Electrical engineering, CIYCEE 2024

作者： He, Yixuan Wang, Jingyu Shi, Dongyuan School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Technology Wuhan430074 China

ISBN: (纸本)9798331530174

The increasing integration of cyber-physical systems has markedly amplified the vulnerability of power systems to False Data Injection Attacks (FDIAs), posing significant threats to their security and reliability. FDIAs can emulate various power system dynamics, each with distinct objectives, potentially leading to incorrect decisions by operators or causing damage that may go undetected initially. The impact of these attacks often hinges on their specific signatures, which reflect the temporal characteristics of the injected data waveforms. Therefore, precise classification of these attack signatures is essential for predicting their potential effects and devising effective countermeasures. This paper addresses this challenge by proposing the use of the VGG16 network, a deep learning model commonly utilized in computer vision, to classify the attack signatures. Leveraging VGG16's ability to identify complex patterns in data, the pro-posed method offers a robust solution for distinguishing between different types of FDIAs. Experimental validation on the IEEE 39-bus system confirms the effectiveness of this approach in improving the detection and classification of FDIAs. © 2024 IEEE.

关键词： Cyber attacks

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A Distribution Network Loss Reduction Strategy Based on Seamless Closed-Loop Load Transfer Devices 3

A Distribution Network Loss Reduction Strategy Based on Seam...

引用

3rd Power System and Green Energy Conference, PSGEC 2023

作者： Du, Miaomiao Li, Jingqi Wang, Dan Mao, Chengxiong Guan, Zhitao Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350340099

Seamless closed-loop load transfer devices(SLTD) itself is used to ensure power supply, but it actually has potential applications in reducing network loss by appropriately transferring load. Aiming at distribution network loss attributable to the mismatching between the output of distributed new energy power supply and the electricity demand of load, a distribution network loss reduction strategy based on SLTD is proposed in this paper. Initially, the loss reduction mechanism is explained and a mathematical model is built. Secondly, a method for optimizing target preprocessing is proposed to reduce the dimensionality of the target data, after which sparrow search algorithm(SSA) is adopted for solution seeking. Finally, a regional distribution network in an urban of China is used as an example to demonstrate the availability of the proposed strategy. Moreover, this strategy shows the potential value of the current stock assets of distribution network. © 2023 IEEE.

关键词： Electric power distribution

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Design of Digital PR Controller for L-type Grid-Connected Inverter 6

Design of Digital PR Controller for L-type Grid-Connected In...

引用

6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Yuan, Aote Cai, Tao Ji, Binrong Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350346671

As a key link between the DC source and the grid, the L-type grid-connected inverter must have good and stable control performance. In this paper, the current inner loop of L-type inverter is studied and the PR controller is designed by analog method and direct digital method. The performance differences between the discretization methods are compared, and the effect of sampling frequency on the discrete error is also analyzed. In the direct numerical method, the law between the controller parameters and the open-loop root trajectory is analyzed, and two sets of PR controllers are designed based on this. Through simulation experiments, it is verified that the PR controller designed by the direct digital method in this paper can achieve smaller overshoot and faster regulation. © 2023 IEEE.

关键词： Controllers

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Summary of research on synchronous generator excitation system 6

Summary of research on synchronous generator excitation syst...

引用

6th IEEE International Electrical and Energy Conference, CIEEC 2023

作者： Yin, Hao Yang, Xiao Xie, Xiong Wang, Weiyu Li, Dayi Zhang, Guangyi Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350346671

Under the background of 'double carbon' strategy including large-scale grid-connection of renewable energy and the power grid interconnection, new situations have put forward increasingly stringent requirements for the safety and stability of power systems in recent years. In this case, the excitation system plays an increasingly important role in the power system. The article summarizes the basic principle of the excitation system, discusses the current status and development tendency of excitation system from excitation mode and core parts of excitation system such as de-excitation device, rectifier device, excitation regulator. The article also discusses the basic theory and development direction of the excitation control strategy from the aspects of AVR and PSS. © 2023 IEEE.

关键词： Renewable energy resources

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A Synchronous Rectification Scheme for Three-Phase LLC Considering Phase Shedding

A Synchronous Rectification Scheme for Three-Phase LLC Consi...

引用

2023 IEEE PELS Students and Young Professionals Symposium, SYPS 2023

作者： Guo, Shuaichen Wang, Xuehua Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350307832

The three-phase LLC resonant converter has gained much attention in battery charger application due to its excellent characteristics such as automatic current sharing, increased power levels, and lower output capacitor current ripple. Moreover, three-phase LLC could improve the converter's efficiency at light load through phase shedding, which is suitable for the absorption stage in charging cycle. However, phase shedding changes actual topology of the converter, which brings challenges to synchronous rectification (SR) scheme. To solve this issue, this paper presents a universal SR scheme for all operating modes of three-phase LLC considering phase shedding. Considering the characteristics of three operating modes and the differences of phase shedding strategy corresponding to every charging stage, how to generate driving signals for synchronous rectifier is discussed in detail. Finally, the effectiveness of the proposed scheme is verified by simulation results. © 2023 IEEE.

关键词： Charging (batteries)

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Detection of False Data Injection Attacks in Smart Grids Under Power Fluctuation Uncertainty Based on Deep Learning

Detection of False Data Injection Attacks in Smart Grids Und...

引用

2023 International Conference on Power System technology, PowerCon 2023

作者： Hu, Dongping Dong, Yiran Wang, Jingyu Shi, Dongyuan Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350300222

The deep integration of cyber-physical power systems renders the traditional state estimator more vulnerable to complex cyber-attacks, such as False Data Injection Attack (FDIA). FDIA can evade the existing Bad Data Detection (BDD) and thus cause adverse effects. Meanwhile, with the improving permeability of renewable energy and the broad application of power electronic devices, smart grids often manifest significant power fluctuation uncertainty. That is, both power generations and loads have strong randomness. However, existing FDIA detection methods are often unable to cope with the changes in the operating condition of smart grids brought by such power fluctuations. To address the problem, this paper proposes a novel deep-learning framework to detect FDIA. It applies a Convolutional Long Short-Term Memory (ConvLSTM) model as the feature extractor to capture the inherent dynamic characteristics and spatio-temporal correlations of smart grid measurements. In addition, the self-attention (SA) mechanism is introduced to make the framework automatically pay attention to the more important features of the measurement data to realize efficient FDIA detection in smart grids under uncertain power fluctuations. Experiments on the IEEE 39-bus system show that the proposed framework exceeds most existing technologies in terms of detection rate and robustness. © 2023 IEEE.

关键词： Smart power grids

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Dynamic Analysis of No-Insulation Insert Magnet Under Changing Background Magnetic Field

Dynamic Analysis of No-Insulation Insert Magnet Under Changi...

引用

2023 IEEE International Conference on Applied Superconductivity and electromagnetic Devices, ASEMD 2023

作者： Duan, Pu Ren, Li Xu, Ying Shi, Jing Tang, Yuejin Li, Jingdong School of Electrical and Electronic Engineering The State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350301571

Due to the excellent thermal stability and high-power density in steady state, no-insulation (NI) winding technology is widely used in the application of superconducting magnets. However, current ripple and background magnetic field fluctuations caused by relative devices result in repetitive turn-to-turn current of the NI insert magnet, which will impose a great impact on the thermal stability of the NI magnet. This paper analyzes the cylindrical and radial current distributions of NI magnet under dynamic operating conditions by 2D finite-element method. The results provide references of thermal conductive structure design and assessment of operational reliability of NI magnets in changing working conditions. © 2023 IEEE.

关键词： current distribution dynamic analysis electric field finite element NI magnet

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