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International Conference on Electrical Machines and Systems (ICEMS)

作者： Minyue Ding Haiyang Fang Ronghai Qu State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Enginnering Huazhong University of Science and Technology Wuhan China

The rotor eddy-current loss caused by high frequency current and magnetic field changes is very high in high-speed permanent magnet machines (HSPMM). This is one of the important factors contributing to the overheat of the PMs. Since the sleeve loss is the main component of the overall rotor loss, it is widely concerned in HSPMM. In this paper, a novel composite sleeve is proposed to reduce the rotor loss. The proposed sleeve is applied to a 90kW, 16000r/min PM machine, the total rotor loss and temperature rise are respectively decreased by 44.5% and 18.7% (25.2°C) compared with a conventional carbon fiber sleeve. Furthermore, the rotor maximum stress is obtained and validated to be within the safe range.

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Coordinated Control Strategy for Multi Hybrid Active Power Filters

Coordinated Control Strategy for Multi Hybrid Active Power F...

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2025 International Conference on Electrical Automation and Artificial Intelligence, ICEAAI 2025

作者： Wang, Chen Yang, Bo Wu, Yutong Li, Mingshu Li, Xingyang Yin, Jingyuan State Grid Beijing Electric Power Company Beijing China Institute of Electrical Engineering Chinese Academy of Sciences Beijing China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Jinan China

ISBN: (纸本)9798331506797

With the development of new power systems and power electronics technology, the power system in the 'double high' scenario faces certain challenges in harmonic control. To achieve precise real-time control of harmonics, this article proposes a collaborative control strategy for multi hybrid active power filters (HAPF). Based on Silicon Carbide Metal-Oxide-Semiconductor Field-Effect Transistor (SiC-MOSFET) novel power components, a modular HAPF was constructed, the active and passive parts were connected through coupling inductance to output effective compensation current. To achieve real-time and accurate detection of harmonics, an adaptive filter is constructed by combining Least Mean Square (LMS) and Least Mean Squared (LMF) method, and adaptively update the weight step size based on the error results. A coupling evaluation index was constructed by introducing the relative gain matrix (RGA), considering the compensation performance, capacity allocation, and coupling effects of each HAPF, the optimal allocation of compensation current for each device is determined. The simulation results showed that the proposed method can accurately detect and compensate for system harmonics through collaborative control of multiple HAPF, thereby improving the power quality of the power system. © 2025 IEEE.

关键词： Adaptive harmonic detection Cooperative Control HAPF Harmonic compensation RGA

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Active Damping of DC Transformer with ISOP Structure Based on Impedance Reshaping

Active Damping of DC Transformer with ISOP Structure Based o...

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IEEE Energy Conversion Congress and Exposition, ECCE

作者： Yangfan Chen Yu Zhang State Key of Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Energering Huazhong University of Science and Technology Wuhan China

The DC transformers (DCTs) constructed by input-series-output-parallel (ISOP) structure with dual active bridge (DAB) submodules (SMs) would face the risk of instability due to the equivalent inductance of input power line, which are neglected in most existing research. This work evaluates the stability characteristics of DCTs and proposes an active damping method for DCTs to ensure the stability. First, the input impedance of DCT is derived. Then, the stability characteristics of DCT are analyzed based on Nyquist Criterion. Next, an impedance reshaping control scheme (IRCS) for DCT is proposed to reshape the input impedance of DCT to achieve stabilization, which is easy to be implemented and no additional sensors are needed. Finally, the relevant experiments validate the performance of IRCS.

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Performance Analysis of Linear Induction Motors Considering Space and Time Harmonics 13

Performance Analysis of Linear Induction Motors Considering ...

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13th International Symposium on Linear Drives for Industry Applications, LDIA 2021

作者： Xiao, Xinyu Xu, Wei Ge, Jian Shangguan, Yongdao State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9781728172101

Under inverter supply, linear induction motor (LIM) is affected by pulse width modulation (PWM) voltage and non-uniform magnetic circuit, which can produce time and space harmonics, and have a negative impact on the drive performance. In order to accurately study the traits and behaviors of the LIM under inverter supply, this paper proposes one comprehensive harmonics equivalent circuit for the LIM. Firstly, the main harmonic components in the motor are analyzed. Then, a harmonics equivalent circuit is proposed, including the derivation of circuit parameters and correction factors. Finally, the performance of LIM considering harmonics is fully investigated and then compared with that of traditional modelling only with fundamental excitation. Both simulation results and theoretical analysis are verified by related experiments. © 2021 IEEE

关键词： Equivalent circuits

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A Symmetrical-Structure Fault Current Limiter for Bipolar DC Distribution Networks

A Symmetrical-Structure Fault Current Limiter for Bipolar DC...

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PELS Students and Young Professionals Symposium (SYPS), IEEE

作者： Yangfan Chen Yu Zhang School of Electrical and Electronic Energering State Key of Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

In a bipolar DC distribution network, both the pole-to-ground fault (PGF) and the pole-to-pole fault (PPF) would threaten its security and stability. This paper proposes a symmetrical-structure fault current limiter (SSFCL) topology, which can help achieve fault riding through (FRT) of PGF and PPF in a bipolar DC distribution network. With the SSFCL, the rising speed of the fault current can be limited, thus ensuring the safety of the DC transformers (DCTs). Then the fault current can be hysteresis controlled within a required range, which provides an adequate fault criterion to locate the faulty load branch. The discharging path of the SSFCL can create a fault current zero point, enabling the solid-state switches to achieve zero-current switching (ZCS) when cleaning the faulty branch. In addition, with the SSFCL, the terminal voltages of the DCTs would not decay during the FRT process, which ensures the fast restoration of the power supply after the fault has been cleaned. The effectiveness of the SSFCL is verified on a ± 375 V bipolar DC experimental prototype. The SSFCL presented in this article provides a solution for the DC fault in a bipolar DC distribution network.

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Active Disturbance Rejection Current Control for Synchronous Reluctance Motor 4

Active Disturbance Rejection Current Control for Synchronous...

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4th IEEE Student Conference on Electric Machines and Systems, SCEMS 2021

作者： Li, Zibo Zhou, Libing Wang, Jin Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9781665436816

Synchronous-frame proportional-integral (PI) current control is the most popular solution in industrial synchronous reluctance motor (SynRM) drive systems. However due to the magnetic saturation and winding temperature rise, the motor parameters(Ld, Lq and Rs) vary widely, leading to deterioration of the current controller. To this end, this paper presents an active disturbance rejection current control (ADRCC) scheme for SynRM drives, which has a simple formation and is robust to machine parameter perturbations. An extended state observer (ESO) is designed to estimate the lumped disturbance in real-time. Then, the estimated lumped disturbance compensates the current loop to a first-order integral element. Meantime, the ADRCC parameters (wo and wc) are just expressed in the desired current loop bandwidth and lumped disturbance bandwidth. Finally, the simulation results demonstrate when the parameters are mismatched, ADRCC performs better transient and steady current tracking performance compared to the PI current controller. © 2021 IEEE.

关键词： Electric current control

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Operation Optimization of Combined Wind Storage System Based on Electrochemical Energy Storage Life

Operation Optimization of Combined Wind Storage System Based...

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Advances in Electrical engineering and Computer Applications( AEECA), 2020 IEEE International Conference on

作者： Tianmeng Yang Jicheng Liu Wei Feng Zelong Chen Peiyu Liu Power Grid Technology Center Northeast Branch of State Grid Corporation of China Shenyang China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and Technology Wuhan China

ISBN: (纸本)9798350355260

To mitigate the intermittency and volatility of large-scale wind farms and alleviate their impacts on traditional fossil fuel-based power units, this paper proposes an integrated wind-storage system based on the operational cost of the power system. This system incorporates large-scale wind power generation and considers diverse service life models as well as the capacity of the electrochemical energy storage. Employing a multi-objective optimization algorithm, this study optimizes the output scheduling of both the electrochemical energy storage and the pumped-hydro energy storage system, ensuring the full integration of wind power into the grid while compensating for deviations in wind power output. The objective is to minimize the operational cost of the power system and reduce the equivalent load fluctuations after the integration of the combined wind-storage system into the grid. Simulation experiments demonstrate the feasibility and rationality of the proposed integrated wind-storage system.

关键词： Wind energy generation Costs Temperature Wind power generation Power system stability Wind farms Discharges (electric) Optimization Thermal stability Energy storage

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Coordinated Control Strategy for Multi Hybrid Active Power Filters

Coordinated Control Strategy for Multi Hybrid Active Power F...

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Electrical Automation and Artificial Intelligence (ICEAAI), International Conference on

作者： Chen Wang Bo Yang Yutong Wu Mingshu Li Xingyang Li Jingyuan Yin State Grid Beijing Electric Power Company Beijing China Institute of Electrical Engineering Chinese Academy of Sciences Beijing China Institute of Electrical Engineering and Advanced Electromagnetic Drive Technology Qilu Zhongke Jinan China Shandong Key Laboratory of Advanced Electromagnetic Conversion Technology Jinan China

ISBN: (数字)9798331506797

ISBN: (纸本)9798331506803

With the development of new power systems and power electronics technology, the power system in the “double high” scenario faces certain challenges in harmonic control. To achieve precise real-time control of harmonics, this article proposes a collaborative control strategy for multi hybrid active power filters (HAPF). Based on Silicon Carbide Metal-Oxide-Semiconductor Field-Effect Transistor (SiC-MOSFET) novel power components, a modular HAPF was constructed, the active and passive parts were connected through coupling inductance to output effective compensation current. To achieve real-time and accurate detection of harmonics, an adaptive filter is constructed by combining Least Mean Square (LMS) and Least Mean Squared (LMF) method, and adaptively update the weight step size based on the error results. A coupling evaluation index was constructed by introducing the relative gain matrix (RGA), considering the compensation performance, capacity allocation, and coupling effects of each HAPF, the optimal allocation of compensation current for each device is determined. The simulation results showed that the proposed method can accurately detect and compensate for system harmonics through collaborative control of multiple HAPF, thereby improving the power quality of the power system.

关键词： Couplings Performance evaluation Adaptive systems Heuristic algorithms Collaboration Harmonic analysis Active filters Real-time systems Resource management Power harmonic filters

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Molecular exchange and passivation at interface afford high-performing perovskite solar cells with efficiency over 24%

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Journal of Energy Chemistry 2023年第7期82卷 219-227,I0005页

作者： Jianjun Sun Wangchao Chen Yingke Ren Yunjuan Niu Zhiqian Yang Li'e Mo Yang Huang Zhaoqian Li Hong Zhang Linhua Hu Key Laboratory of Photovoltaic and Energy Conservation Materials Institute of Solid State PhysicsHFIPSChinese Academy of SciencesHefei 230031AnhuiChina School of Chemistry and Chemical Engineering Anhui Province Key Laboratory of Advanced Catalytic Materials and Reaction EngineeringHefei University of TechnologyHefei 230009AnhuiChina College of Science Hebei University of Science and TechnologyShijiazhuang 050018HebeiChina Hebei Computational Optical Imaging and Photoelectric Detection Technology Innovation Center Hebei International Joint Research Center for Computational Optical Imaging and Intelligent SensingSchool of Mathematics and Physics Science and EngineeringHebei University of EngineeringHandan 056038HebeiChina University of Science and Technology of Chin1 Anhui 230026HefeiChina

The interface is crucial for perovskite solar cells(PSCs).However,voids at interfaces induced by the trapped hygroscopic dimethyl sulfoxide(DMSO)can reduce charge extraction and accelerate the film degradation,seriously damaging the efficiency and *** this work,4,4’-dinonyl-2,2’-dipyridine(DN-DP),a Lewis base with long alkyl chains is introduced to solve this *** calculated and experimental results confirm that the dipyridyl group on DN-DP can more strongly coordinate with Pb^(2+)than that of the S=O group on *** strong coordination effect plays a crucial role in removing the DMSO-based adduct and reducing the formation of *** to the electron-donating properties of pyridine,the existence of DN-DP in the perovskite film can passivate the defects and optimize the energy level alignment of the perovskite *** open-circuit voltage(VOC)of the DN-DP-based PSC is improved from 1.107 V(control device)to 1.153 V,giving rise to a power conversion efficiency(PCE)of24.02%.Furthermore,benefiting from the moisture resistance stemming from the hydrophobic nonyl group,the PCE retains 90.4%of the initial performance after 1000 h of storage in the ambient condition.

关键词： Perovskite solar cell Anti-solvent 4 4′-Dinonyl-2 2′-dipyridine Optimized interfaceStability

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Remaining Useful Life Prediction of Li-Ion Batteries by Multi-modal Attention Fusion Network

Remaining Useful Life Prediction of Li-Ion Batteries by Mult...

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Electrical engineering (CIYCEE), IEEE China International Youth Conference on

作者： Wuxin Sha Danpeng Cheng Qigao Han Yaqing Guo Baoshuai Du Shijie Cheng Yuan-Cheng Cao State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan China State Grid Shandong Electric Power Research Institute Jinan China

ISBN: (数字)9798331530174

ISBN: (纸本)9798331530181

Lithium-ion batteries are crucial for electric vehicles and smart grids, yet their performance degrades with charge-discharge cycles, leading to reduced capacity and increased resistance. Predicting the Remaining Useful Life (RUL) is essential for preventing failures and ensuring stable operation. However, estimating RUL is challenging due to its indirect measurability and the influence of various factors such as battery components, packaging processes, and operating conditions. This paper presents a Multimodal Attention Fusion Neural Network (MAFN) to forecast battery health and RUL using historical data. Trained on a diverse electrochemical dataset with various battery components and cycling conditions, the model integrates battery materials and electrical signals, capturing critical aging features for accurate RUL prediction. This approach advances rapid RUL estimation, enhancing battery management systems and supporting smart grid and carbon neutrality goals.

关键词： Lithium-ion batteries Resistance Accuracy Neural networks Predictive models Packaging Data models Smart grids Reliability Optimization

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