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Science and technology Innovation (IAECST), International Academic Exchange Conference on

作者： Junbiao Shi Mingming Ji Sha Zheng Xiong He Yoga Chen Zhiqi Huang Beijing Spacecraft China Technology Corporation And Control Engineering Aerospace Science and Beijing Space Power Conversion Research Center Beijing China

ISBN: (纸本)9781665402682

The existing aerospace power supply and distribution system is difficult to deal with the fault of a single machine in real time, and the timeliness is difficult to ensure. If the fault with potential serious harm cannot be isolated and dealt with in time, the best period of fault treatment will often be missed. In this paper, a satellite intelligent distribution path architecture based on matrix switch is proposed. Through the effective combination of solid-state power switch, interface circuit, current sensor and host computer software, the switch in the matrix is controlled to realize the construction of distribution path and active management of power energy flow under the distributed architecture. Combined with the functional requirements of the distribution channel defined by the traditional hardware and the application characteristics of the new architecture, the design and application experience of the new matrix distribution channel architecture in the aspects of satellite distribution flexibility, intelligence, fault diagnosis and omni-directional operation information monitoring of pre judged power supply and distribution system are summarized, it provides technical reference and theoretical support for the innovation of flexible and intelligent distribution system defined by subsequent software.

关键词： Technological innovation Satellites power supplies Redundancy power distribution Computer architecture Switches

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Quasi-Parallel Resonant Switched Capacitor DC-DC Converter with Continuous Voltage Regulation Capability

Quasi-Parallel Resonant Switched Capacitor DC-DC Converter w...

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IEEE Energy conversion Congress and Exposition, ECCE

作者： Jingjing Qi Xuezhi Wu Wenzheng Xu Kai Sun Department of Electrical Engineering State Key Laboratory of Power System Operation and Control Tsinghua University Beijing China National Active Distribution Network Technology Research Center Beijing Jiaotong University Beijing China

ISBN: (数字)9798350376067

ISBN: (纸本)9798350376074

Resonant switched capacitor converters have the advantages of small size, light weight and high efficiency, but have poor voltage regulation ability. To overcome this problem, a quasi-parallel resonant switched capacitor DC-DC converter is proposed in this paper, which mainly incorporates a resonant switched capacitor converter with soft-switching and variable voltage ratio and a Buck converter. Most of the power can be transmitted by the resonant switched capacitor converter, while the Buck converter is responsible for output voltage regulation. In addition, the voltage ratio of the resonant switched capacitor converter can be flexibly changed base on the input voltage, which is beneficial for Buck converter to always handle a small portion of power. Furthermore, input voltage feedforward control is incorporated to suppress the input voltage disturbance. The proposed converter can not only continuously regulate the voltage over a wide range, but also perform high efficiency and achieve rapid dynamic response. The operating principle of the converter is introduced, the circuit characteristic is analyzed, and the correctness of the theoretical analysis is verified by experiments.

关键词： Dynamic response Buck converters Voltage fluctuations Fluctuations Capacitors Soft switching Switches Regulation Voltage control Zero current switching

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The Design of Low Voltage Multi-channel Sequential Output space Borne power Supply

The Design of Low Voltage Multi-channel Sequential Output Sp...

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Electrical engineering and Automation (IFEEA), International Forum on

作者： Zhiqi Huang Pengfei Xie Mingming Ji Zhongyang Hu Beijing Spacecrafts Co. Ltd. Beijing Space Power Conversion and Control Engineering Research Center Beijing China

spacecraft is a large system composed of multiple units, all of which need a dedicated power supply. Based on the research background of miniaturized, light weight and high efficiency spacecraft, the low voltage multi-channel sequential output power supply with high reliability and high efficiency is designed in this paper. The traditional space borne power supply employs direct conversion to convert the on-board bus voltage into the voltage required by the load. Due to the large voltage transfer ratio (100), the single-stage converter is difficult to achieve high efficiency, high precision, good load regulation rate and good cross regulation rate. In order to solve the problem, this paper introduces a design method of two-stage converter, which realizes high efficiency, small volume, ultra-low voltage and multi-channel sequential output [1] .

关键词： space vehicles Electrical engineering Low voltage Automation power supplies Design methodology Reliability engineering

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An Optimization Method for Multi-loop Transient Performance Suitable for Multi-module Expansion

An Optimization Method for Multi-loop Transient Performance ...

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International Conference on Electrical Machines and Systems (ICEMS)

作者： Yi Zhang Donglai Zhang Yunhan Fan Qian Wan Qing Liu Shaolin Wang Power Electronics and Motion Control Research Center Harbin Institute of Technology (Shenzhen) Shenzhen China Unit 61655 the People’s Liberation Army Chongqing China Department of Aerospace Power Shenzhen Aerospace New Power Technology Co. Ltd Shenzhen China Beijing institute of Spacecraft System Engineering China Academy of Space Technology Beijing China

With the increase of power utilization rate of renewable energy systems and the profound studies of DC microgrids, DC distribution systems are getting more attention. To improve the quality of DC bus, it is necessary to consider the voltage fluctuations caused by loop switching such as battery management and maximum power output in the system. An optimization method is proposed to accelerate the switching process of multiple control loops, especially for multi-module expansion, which can improve the performance of dynamic response The proposed method just requires the addition of a few devices to the circuit structure and realizes nonlinear control, with which the conditional intervention only happens during transient processes without affecting the steady-state loop design. Compared with traditional methods, this method can achieve power expansion of the system as well as a quick response under load step or bus voltage overshoot.

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A method for battery health estimation under variable operating conditions based on the fusion of simplified electrochemical model and alpha evolution-back propagation model

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Journal of Energy Storage 2025年 123卷

作者： Shan, Runzhe Wang, Yaxuan Wang, Chao Cui, Yue Guo, Shilong Jiang, Yunfeng Wang, Qiwei Zhao, Lei Rong, Changru Li, Junfu Wang, Zhenbo State Key Laboratory of Space Power-Sources MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage MOE Engineering Research Center for Electrochemical Energy Storage and Carbon Neutrality in Cold Regions School of Chemistry and Chemical Engineering Harbin Institute of Technology Heilongjiang Harbin150001 China School of Automotive Engineering Harbin Institute of Technology at Weihai Shandong Weihai264209 China National Key Laboratory of Advanced Vehicle Integration and Control China FAW Grp Co Ltd Jilin Changchun130013 China

In recent years, research on the state of health (SOH) estimation of lithium-ion batteries under variable operating conditions receives widespread attention. Data-driven methods for SOH estimation of lithium-ion batteries often lack interpretability and reliability. This study proposes a novel model-data hybrid-driven approach that combines a simplified electrochemical model with an α-evolution-back propagation model to accurately predict SOH under variable operating conditions. The exponential-trigonometric optimization algorithm is applied for the first time to effectively identify parameters of the simplified electrochemical model, extracting more reliable and interpretable features throughout the full lifecycle of lithium-ion batteries. The alpha evolution algorithm is employed to optimize the initial parameters of the back propagation neural network, using features based on model parameters identified under variable operating conditions as inputs to the alpha evolution-back propagation model for SOH estimation. The proposed method is validated on three self-constructed datasets under variable operating conditions. The results show that the prediction accuracy exceeds 99.5 %, with the highest accuracy approaching 99.9 %. The training and testing dataset partitioning criteria used in this study hold significant practical relevance, aligning well with the requirements of using historical data to predict SOH degradation of retired lithium-ion batteries under predefined scenarios for their cascade utilization. This method provides valuable insights for enhancing the safety of cascade utilization of retired batteries. © 2025 Elsevier Ltd

关键词： Lithium-ion batteries

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research on high-efficiency battery charge regulator based on superbuck topology 2

Research on high-efficiency battery charge regulator based o...

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2nd International Conference on Smart power and Internet Energy Systems, SPIES 2020

作者： Zhang, Guo-Shuai Wu, Jian-Chao Zhao, Wen-Jie Zhi, Shu-Bo Zheng, Yan Wan, Cheng-An Beijing Space Power Conversion and Control Engineering Research Center Beijing Spacecraft China Aerospace Science and Technology Corporation Beijing100190 China China Aerospace Science and Technology Corporation National Space Science Center Chinese Academy of Sciences Beijing Spacecraft Beijing100190 China

ISBN: (数字)9781728166117

ISBN: (纸本)9781728166117

From the perspective of the space power conditioning unit(PCU) system, this paper studies the battery charging controller based on the Superbuck topology and the characteristics of lithium-ion batteries. We analysis the operating mode of the converter, establish the model of the converter, then we analysis the battery charge control circuit, finally we carry out the simulation and experimental result. © 2020 IEEE.

关键词： Topology

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Polarization conversion and Beam Separation Based on All-Dielectric Metasurface

Polarization Conversion and Beam Separation Based on All-Die...

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2022 International Applied Computational Electromagnetics Society Symposium, ACES-China 2022

作者： Chen, Cong Feng, Xing Y. Liu, Hai Li, Xun Y. China University of Mining and Technology Engineering Research Center of Intelligent Control for Underground Space Ministry of Education Xuzhou221116 China China University of Mining and Technology School of Information and Control Engineering Xuzhou221116 China China University of Mining and Technology School of Materials and Physics Xuzhou221116 China State Grid Corporation of China Benxi Power Supply Company Maintenance Branch Benxi117000 China

ISBN: (纸本)9781665452366

An all-dielectric phase gradient metasurface is proposed, which consists of a periodic array of elliptical silicon nanopillars with a phase difference of π on a quartz substrate. The polarization and transmission characteristics of the unit half-wave plate structure are comprehensively studied, and the simulation results show that its transmission efficiency in multiple communication frequency bands can reach 98%, and the polarization conversion efficiency can reach 90% ∼ 99%. Furthermore, we arrange the half-wave plates as a periodic integrated supercell array, which realizes the polarization conversion and spatial separation of the beams. he proposed all-dielectric metasurface offers a strategy for creating compact, integrated and high-performance plasmonic multifunctional devices. © 2022 IEEE.

关键词： Plates (structural components)

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Enhancing Aerosol Emission Reduction in an Ammonia-Based Wfgd System with Tray Implementation

SSRN

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SSRN 2023年

作者： Huang, Rongting Tao, Yichun Chen, Wanyi Lei, Lin Li, Shihang Yang, Linjun Zhou, Fubao Jiangsu Engineering Research Center of Dust Control and Occupational Protection School of Safety Engineering China University of Mining and Technology Xuzhou221116 China Key Laboratory of Energy Thermal Conversion and Control Ministry of Education Southeast University Nanjing China China Academy of Safety Science and Technology Beijing116016 China

Operating parameter optimization is a viable strategy to reduce aerosol emissions from an ammonia-based wet flue gas desulfurization (ammonia WFGD) system. But the optimization techniques typically cause SO2 removal efficiency reduction. Multi-hole trays can be installed in the scrubber to balance the aerosol emission control and the desulfurization efficiency. The experimental results show that the tray installation alone can barely enhance aerosol emission control. However, the tray installation can improve the SO2 removal efficiency to spare more space for operating parameter optimization. The smaller hole size favors the SO2 removal with a particular hole ratio. Optimizing the liquid-to-gas ratio (L/G) works well with tray installation to realize aerosol emission reduction, with the aerosol reduction rate over 50%. The improvement brought about by the tray installation only works within a specific L/G range, beyond which the tray cannot make up for the desulfurization efficiency reduction caused by L/G optimization. The best aerosol emission reduction rate was achieved at L/G = 8 L/m3 with the tray installation of 35% hole ratio and 10 mm diameter, with the desulfurization efficiency maintained above 90%. The tray with 35% hole ratio and 20 mm diameter can be employed at L/G = 8 L/m3 for better aerosol emission if the SO2 removal efficiency below 90% is acceptable. The choice is due to desulfurization efficiency and aerosol emission control demand. © 2023, The Authors. All rights reserved.

关键词： Emission control

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A Simple Approach to Data-driven Security Detection for Industrial Cyber-Physical Systems

A Simple Approach to Data-driven Security Detection for Indu...

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第34届中国控制与决策会议

作者： Bin Liu Jingzhao Chen Yong Hu Engineering Research Center of Metallurgical Automation and Measurement Technology Ministry of EducationWuhan University of Science and Technology School of Information Science and Engineering Wuhan University of Science and Technology Science and Technology on Space Intelligent Control Laboratory Beijing Institute of Control Engineering

In this paper,a data-driven security detection approach is proposed in a simple *** detector is designed to deal with false data injection attacks suffered by industrial cyber-physical systems with unknown model ***,the attacks are modeled from the perspective of the generalized plant mismatch,rather than the operating data being ***,some subsystems are selected to reduce the design complexity of the detector,and based on them,an output estimator with iterative form is presented in a theoretical ***,a security detector is constructed based on the proposed estimator and its cost ***,the effectiveness of the proposed approach is verified by simulations of a Western States Coordinated Council 9-bus power system.

关键词： Security Detection Industrial Cyber-Physical Systems False Data Injection Attack Data-driven

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Analysis of a hybrid system combining solar-assisted methanol reforming and fuel cell power generation

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Energy conversion and Management 2023年 297卷

作者： Zhao, Ke Kong, Hui Tan, Sicong Yang, Xiao-Guang Zheng, Hongfei Yang, Tao Wang, Hongsheng School of Mechanical Engineering Beijing Institute of Technology Beijing100081 China State Key Laboratory of Power System Operation and Control Department of Thermal Engineering Tsinghua-BP Clean Energy Center Tsinghua University Beijing100084 China Shenzhen Automotive Research Institute Beijing Institute of Technology Guangdong Shenzhen518118 China & Department of Materials Science and Engineering City University of Hong Kong Hong Kong SAR Kowloon China

The proton exchange membrane fuel cell (PEMFC) is an efficient and clean power unit that has become a research hotspot for scholars around the world, but the hydrothermal management of the PEMFC limits the cell performance and hinders its large-scale application. In the paper, a hybrid system combining solar-assisted reforming of methanol and fuel cell power generation is proposed, in which methanol is used as a coolant in the hydrothermal management of the PEMFC subsystem to take away the waste heat, and further reformed for hydrogen production with the assistance of the solar energy subsystem to improve the hybrid system efficiency. The study is carried out at both the single cell level and system level to investigate the effect of solar energy on the performance of the hybrid system by simulation results, which are obtained from the finite element software, such as the performance of the PEMFC. The results show that the novel hydrothermal management method using methanol and water in the single cell can control the temperature at 60–80 °C. The highest power density of the single cell reaches 0.595 W/cm2 at a water-to-alcohol ratio of 1:1 and a coolant flow rate of 2.846 mol/s. In addition, the exergy of this hybrid system improves by 76.36% compared to the exergy of the solar thermochemical methanol reforming system at a reaction temperature of 200 °C when the methanol reforming reaction is more complete. The system efficiency can reach up to 59.15%, compared to the solar thermochemical methanol reforming system and the methanol reforming system heated by combustion of methanol, which can only reach 51.10% and 43.18%, respectively. This study provides a novel method for addressing the hydrothermal management issue of PEMFC and a new idea for the efficient utilization of solar energy. © 2023 Elsevier Ltd

关键词： Solar energy

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