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Low-carbon Operation of Combined Heat and Power Integrated Plants Based on Solar-assisted Carbon Capture

Journal of Modern Power Systems and Clean Energy 2022年第5期10卷 1138-1151页

作者： Xusheng Guo Suhua Lou Yaowu Wu Yongcan Wang State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074China State Grid Sichuan Electric Power Research Institute Chengdu 610041China

Accelerating the development of renewable energy and reducing CO_(2)emissions have become a general consensus and concerted action of all countries in the world. The electric power industry, especially thermal power industry, is the main source for fossil energy consumption and CO_(2)emissions. Since solvent-based post-combustion carbon capture technology would bring massive extra energy consumption, the application of solar-assisted carbon capture technology has attracted extensive attention. Due to the important role of coal-fired combined heat and power plants for serving residential and industrial heating districts, in this paper, the low-carbon operation benefits of combined heat and power integrated plants based on solar-assisted carbon capture(CHPIP-SACC) are fully evaluated in heat and power integrated energy system with a high proportion of wind power. Based on the selected integration scheme, a linear operation model of CHPIP-SACC is developed considering energy flow characteristics and thermal coupling interaction of its internal modules. From the perspective of system-level operation optimization, the day-ahead economic dispatch problem based on a mix-integer linear programming model is presented to evaluate the low-carbon benefits of CHPIP-SACC during annual operation simulation. The numerical simulations on a modified IEEE 39-bus system demonstrate the effectiveness of CHPIP-SACC for reducing CO_(2)emissions as well as increasing the downward flexibility. The impact of different solar field areas and unit prices of coal on the low-carbon operation benefits of CHPIP-SACC is studied in the section of sensitivity analysis.

关键词： Solar-assisted carbon capture CO_(2)emission reduction combined heat and power integrated plant heat and power integrated energy system wind power

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An Improved Third-Order Generalized Integrator Based Novel Sliding Mode Observer for Piston Stroke Estimation of Linear Oscillatory Machine

An Improved Third-Order Generalized Integrator Based Novel S...

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

作者： Abbass, Mudassar Xu, Wei Junejo, Abdul Khalique Liao, Kaiju Ur Rehman, Khalil Rahman, Abdur School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan430074 China Haidian District China

ISBN: (纸本)9798331530174

Linear compressors are being widely used in a huge variety of applications due to their higher efficiency than traditional rotary compressors. The linear compressor is driven by the Linear Oscillatory Machine (LOM), and the sensor-less control of LOM is very important to make linear compressors more efficient and compatible auxiliary for big systems like refrigerators, air conditioners, automatic gates etc. A novel piston stroke estimation method has been proposed in this article to obtain the sensor less control of the LOM. This method utilizes an improved third-order generalized integrator (TOGI) based novel sliding mode observer (SMO) for LOM piston stroke estimation. In addition to this, an absolute reaching law with a chosen sliding surface has been implemented to further reduce the effects of sliding chattering. The piston stroke signal suffers DC offsets and harmonics due to mismatched machine parameters, nonlinearities of the converter, and first-order integration of back-electromotive force (EMF). In some recent studies, the second-order generalized integrator (SOGI) has been used to reduce pure integral saturation problem, but it still has a limited attenuation ability against DC components and has considerable steady-state error. Therefore, in order to improve the accuracy of the estimated stroke signals, a new method has been proposed in this article, which can not only solve the integral saturation problem, but also reduce the steady-state error of the estimated piston stroke, effectively. The simulation results and the numerical analysis prove the authenticity of the proposed method. © 2024 IEEE.

关键词： Pistons

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Tuning Solid Interfaces via Varying Electrolyte Distributions Enables High-Performance Solid-state Batteries

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Energy & Environmental Materials 2023年第2期6卷 26-33页

作者： Linfeng Peng Chuang Yu Ziqi Zhang Ruonan Xu Mengjun Sun Long Zhang Shijie Cheng Jia Xie State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430000China School of Physics Huazhong University of Science and TechnologyWuhan 430000China Clean Nano Energy Center State Key Laboratory of Metastable Materials Science and TechnologyYanshan UniversityQinhuangdao 066004China School of Materials Science and Engineering Huazhong University of Science and TechnologyWuhan 430000China

Solid/solid interface is the major challenge for high-performance solid-state *** electrolytes(SEs)play a crucial role in the fabrication of effective interfaces in solid-state ***,the electrolyte distribution with varied particle sizes is tuned to construct solid-state batteries with excellent performance at different operating ***-state batteries with the configuration S/L(small-sized SE in composite cathode and large-sized SE in electrolyte layer)show the best performance at room temperature(168 mA h g^(−1) at 0.2 C,retention of 99%,100 cycles)and−20°C(89 mA h g^(−1) at 0.05 C),while the configuration S/S displays better performance at elevated *** superior performance of S/L battery is associated with faster lithium-ion dynamics due to the better solid/solid interface between active materials and ***,the inferior performance at 60℃is caused by the formation of voids and cracks in the electrolyte layer during *** contrast,the S/S battery delivers superior performance at elevated operating temperature because of the integrated *** work confirms that tailoring electrolyte size has significant effect on fabricating all-climate solid-state batteries.

关键词： electrochemical performance lithium argyrodite operating temperature size distribution solid-state batteries

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High-rate sodium metal batteries enabled by trifluormethylfullerene additive

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Nano Research 2022年第8期15卷 7172-7179页

作者： Pengju Li Xiaobo Huang Zhipeng Jiang Han Zhang Pengwei Yu Xing Lu Jia Xie State Key Laboratory of Materials Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhan 430074China State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074China

Sodium metal is a promising anode for sodium batteries due to its high theoretical capacity and low ***,the serious Na dendrite growth and low Coulombic efficiency,especially at high current densities/cycling capacities,severely limit the application of sodium metal ***,trifluoromethylfullerene,C_(60)(CF_(3))_(6),is designed as an electrolyte additive to enable the high-rate cycling of sodium metal anodes with high Coulombic *** CF3 groups contribute to the formation of stable NaF-rich solid electrolyte interface layer,while C_(60)cages induce the uniform distribution of sodium ions and promote the formation of smooth and compact ***,Na||Cu cell with C_(60)(CF_(3))_(6)can be cycled at 2 mA·cm^(−2)and 10 mAh·cm^(−2)over 180 cycles with an average Coulombic efficiency of 99.9%,and Na||Na cell can be cycled at 10 mA·cm^(−2)over 600 ***,Na||NaV2(PO_(4))_(3)@C full cell exhibits high capacity retention of 84%over 2,000 cycles at 20 C(~3 mA·cm^(−2)).

关键词： sodium metal anode fullerene trifluormethylfullerene high rate electrolyte additive

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O-doping strategy enabling enhanced chemical/electrochemical stability of Li_(3)InCl_(6) for superior solid-state battery performance

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Journal of Energy Chemistry 2024年第12期99卷 484-494页

作者： Qiyue Luo Chen Liu Lin Li Ziling Jiang Jie Yang Shaoqing Chen Xia Chen Long Zhang Shijie Cheng Chuang Yu State Key Laboratory of Advanced Electromagnetic Technology School of Electrical and Electronic EngineeringHuazhong University of Science and TechnologyWuhan 430074HubeiChina School of Chemistry and Chemical Engineering Huazhong University of Science and TechnologyWuhan 430074HubeiChina College of Energy Soochow Institute for Energy and Materials InnovationsJiangsu Provincial Key Laboratory for Advanced Carbon Materials and Wearable Energy TechnologiesSoochow UniversitySuzhou 215006JiangsuChina College of Physics and Energy Fujian Normal UniversityFuzhou 350117FujianChina

Solid-state electrolytes with high oxidation stability are crucial for achieving high power density allsolid-state lithium *** electrolytes are promising candidates due to their outstanding compatibility with cathode materials and high Li^(+)***,the electrochemical stability of chloride electrolytes is still limited,leaving them unsuitable for ultrahigh voltage ***,chemical compatibility issue between sulfide and halide electrolytes affects the electrochemical performance of all-solid-state ***,Li-ion conductor Li_(3+x)InCl_(6-x)O_(x) is designed to address these ***_(3.25)InCl_(5.75)O_(0.25)shows a Li-ion conductivity of 0.90 mS cm^(-1)at room temperature,a high onset oxidation voltage of 3.84 V,fewer by-products at ultrahigh operation voltage,and good chemical compatibility with Li_(5.5)PS_(4.5)Cl_(1.5).The Li_(3.25)InCl_(5.75)O_(0.25)@LiNi_(0.7)Co_(0.1)Mn_(0.2)O_(2)-Li_(3.25)InCl_(5.75)O_(0.25)-VGCF/Li_(3.25)InCl_(5.75)O_(0.25)/Li_(5.5)PS_(4.5)Cl_(1.5)/Li-In battery delivers good electrochemical performances at high operating *** work provides a simple,economical,and effective strategy for designing high-voltage all-solid-state electrolytes.

关键词： Li_(3)InCl_(6) O doping Wide electrochemical window Chemical stability Interfacial stability Superior electrochemical performance

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A Real-Time Junction Temperature Estimating Method for SiC MOSFET Based on the Turn-on Drain-Source Current Oscillation

A Real-Time Junction Temperature Estimating Method for SiC M...

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International Conference of Electrical, Electronic and Networked Energy Systems, EENES 2024

作者： Yang, Fengming Liang, Lin Zhang, Ziyang State Key Laboratory of Advanced Electromagnetic Technology Power Electronics and Energy Management Key Laboratory Ministry of Education of China School of Electrical and Electronic Engineering Huazhong University of Science and Technology Wuhan430070 China

ISBN: (纸本)9789819618514

Online junction temperature (Tj) measurement is critical for SiC MOSFET reliability evaluation health management and life prediction. In order to make the tradeoff between availability, simplicity, as well as accuracy, this article demonstrates a real-time junction temperature estimating method by selecting the current oscillation peak of drain source (Ioscpeak) during turn-on transient as a temperature sensitive electrical parameter (TSEP). The theoretical and simulation analysis results show that the Ioscpeak is available to be a TSEP. Then, the model of Ioscpeak and Tj is derived through fitting curve based the experimental results. The voltage and load current dependency of proposed method are also discussed. The experimental results demonstrate that the bus voltage level has a negligible influence to the relationship between the Ioscpeak and the Tj, the value of Ioscpeak is increasing with the increment of current level at the specific temperature. The sensitivity of proposed method has a satisfactory performance of junction temperature estimation. The estimation circuit of proposed method has a simplicity hardware with low cost and easy to be implanted with gate drive of SiC MOSFET. © Beijing Paike Culture Commu. Co., Ltd. 2025.

关键词： MOSFET devices

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Stress wave analysis of high-voltage pulse discharge rock fragmentation based on plasma channel impedance model

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Plasma Science and technology 2023年第6期25卷 52-64页

作者：黄仕杰刘毅赵勇徐尤来林福昌李化张钦李柳霞 School of Electrical and Electronic Engineering Huazhong University of Science and TechnologyWuhan 430074People's Republic of China State Key Laboratory of Advanced Electromagnetic Engineering and Technology Huazhong University of Science and TechnologyWuhan 430074People's Republic of China Key Laboratory of Pulsed Power Technology(Huazhong University of Science and Technology) Ministry of EducationWuhan 430074People's Republic of China

High-voltage pulse discharge(HVPD)rock fragmentation controls a plasma channel forming inside the rock by adjusting the electrical parameters,electrode type,*** this work,an HVPD rock fragmentation test platform was built and the test waveforms were *** the effects of temperature,channel expansion and electromagnetic radiation,the impedance model of the plasma channel in the rock was *** parameters and initial values of the model were determined by an iterative computational *** model calculation results can reasonably characterize the development of the plasma channel in the rock and estimate the shock wave *** on the plasma channel impedance model,the temporal and spatial distribution characteristics of the radial stress and tangential stress in the rock were calculated,and the rock fragmentation effect of the HVPD was analyzed.

关键词： stress wave shock wave plasma channel impedance model rock fragmentation high-voltage pulse discharge

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A Fast Transient Control Method for Dual-Bridge Series Resonant Converter 2

A Fast Transient Control Method for Dual-Bridge Series Reson...

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2nd IEEE International Power Electronics and Application Symposium, PEAS 2023

作者： Li, Zhuolan Zhang, Yu School of Electrical and Electronic Engineering Huazhong University of Science and Technology State Key of Laboratory of Advanced Electromagnetic Engineering and Technology Wuhan China

ISBN: (纸本)9798350313765

Under extended-phase-shift (EPS) modulation, both the internal phase-shift angle and the external phase-shift angle will have large step changes when the dual-bridge series resonant converter (DBSRC) rapidly adjusts the transmission power. This will cause serious oscillations in the resonant current and resonant voltage of DBSRC and threaten the safety of the converter. This paper analyzes the transient process produced by sudden changes in phase shift angles under EPS modulation. Then a fast transient control method is proposed for suppressing the oscillation by utilizing both internal and external phase-shift angles, which controls the transient process within one switching cycle and achieves a smooth transition of transmission power. Besides, impact and oscillation on the resonant current and resonant voltage during transient processes are significantly reduced. Finally, the performance of the control method is verified based on experimental and simulation results. © 2023 IEEE.

关键词： DBSRC EPS fast transient control oscillation impact series resonant

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Design of a 13 Tesla Hybrid Magnet

Design of a 13 Tesla Hybrid Magnet

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

作者： Yang, Zhixing Ren, Li Duan, Pu Xu, Ying Shi, Jing Huazhong University of Science and Technology The State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Wuhan China

ISBN: (纸本)9798350301571

The Iron-based superconductors(IBS) have high upper critical field, low anisotropy and strong current carrying capacity, which are expected to be the next-generation high temperature superconductors. This paper describes a 13 Tesla hybrid magnet using YBCO tapes and iron-based tapes. The design approach is aimed at verifying the superiority of Iron-based superconducting tapes using a shorter length of IBS tapes. The support structure is designed to improve the mechanical stability of magnets. Through mechanical analysis, it is verified that the magnet meets the design requirements and the operation stability. © 2023 IEEE.

关键词： hybrid magnet iron-based superconductor magnet design

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Antioxidant Migration on Dielectric Properties of Long-term Impregnated Insulating Oil 23

Antioxidant Migration on Dielectric Properties of Long-term ...

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23rd International Symposium on High Voltage engineering, ISH 2023

作者： Wang, Yucheng Li, Hua Huang, Ziqin Lin, Fuchang State Key Laboratory of Advanced Electromagnetic Engineering and Technology School of Electrical and Electronic Engineering Huazhong University of Science & Technology Wuhan China

ISBN: (纸本)9781839539954

High voltage capacitors are widely used in electrical power systems. For better capability in applications, capacitors are impregnated with insulating oil. Polypropylene in its natural state is inherently unstable and degrades when exposed to oxygen. To avoid oxidation that occurs in the process of film forming, antioxidants are developed and used. In this paper, the polypropylene casts added respectively with antioxidant 1010, 3114, 330 and BHT were long-term impregnated in benzyl toluene oil. Secondly, the frequency domain dielectric spectroscopy method was used to study the dielectric properties of the oil. In addition, the effect of antioxidants on the polarization relaxation process of insulating oil was analyzed. The results indicate that antioxidants and small molecular polypropylene in the amorphous region of the film migrate to the oil during long-term impregnation, resulting in increases in relative dielectric constant Εr, dielectric loss tanδ and dc conductivity σdc, and affect the polarization relaxation process. Among these antioxidants, antioxidant 1010 has the greatest impact on insulating oil, while antioxidant 330 has the least impact. © The Institution of engineering & technology 2023.

关键词： Dielectric losses

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