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Research on load state prediction model of electric vehicle lithium battery based on Kalman filter algorithm

International Journal of Vehicle Information and Communication Systems 2024年第3期9卷 276-291页

作者： Zheng, Xiu Nie, Zhen Yang, Jie Li, Qiqi Li, Fenglin School of Electrical Engineering & Automation Henan Institute of Technology Henan Xinxiang China

The monitoring and protection of the power core lithium battery of electric vehicles is closely related to whether the lithium battery can output energy efficiently. To predict the charging state of lithium batteries, this study determined the online identification method, namely Recursive Least Square Method with Forcing Fact (FRLS), for model parameters based on the equivalent circuit model of lithium batteries, namely Thevenin. The overall prediction error of SVD-UKF is lower than that of Adaptive Extended Kalman Filter (AEKF) and Iterative Extended Kalman Filter (IEKF), which are about 20% and 30%, respectively. FRLS&Singular Value Decomposition-Unscented Kalman Filter (FRLS&SVD-UKF) has low prediction error of lithium battery load state under the same working condition and temperature, and the prediction error of lithium battery load state under the same working condition shows a gradually increasing trend with the increase of temperature. The FRLS&SVD-UKF joint prediction model can accurately predict the load state of lithium battery in electric vehicles in real time, and can improve the recycling performance of lithium battery. Copyright © 2024 Inderscience Enterprises Ltd.

关键词： Singular value decomposition

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Control With Fault Detection Of The DC Microgrids Using SDRE-Controller-Observer

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Journal of Applied Science and engineering 2024年第4期27卷 2315-2324页

作者： Ma, Linchao Mao, Jingkui School of Electrical Engineering and Automation Henan Institute of Technology Henan Xinxiang453003 China School of Electrical Engineering and Automation Hefei University of Technology Anhui Hefei230009 China

In the present work, using the State-Dependent Riccati Equation approach, the optimal optimizer-controller is designed for a small DC network isolated from the network. The objectives are to control the output voltage of the solar cell, as well as output voltages of the battery, the capacitor bank and the DC busbar, and to detect possible faults in a timely manner. In the State-Dependent Riccati Equation observer–controller design process, a non-linear model is used for modeling the dynamic behavior of the microgrid in different operating conditions. The efficiency of the studied microgrid has been assessed in the presence of uncertainty in system parameters and measurement noise. The results of the simulations show the ability of the suggested approach to detect faults in a timely manner, not to recognize the disturbance as a fault, as well as the effective and resistant performance of the progressive controller even in the disturbance presence. Quantitatively, the proposed fault detection method was able to generate non-zero residual current in the presence of faults, allowing for fault detection by defining an appropriate threshold. The threshold used in the study was 50. Additionally, the fault detection system was able to avoid misdiagnosis of disturbances as faults. © The Author(’s).

关键词： Riccati equations

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Time-dependent reliability analysis of aerospace electromagnetic relay considering hybrid uncertainties quantification of probabilistic and interval variables

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Chinese Journal of Aeronautics 2024年第12期37卷 99-115页

作者： Fabin MEI Hao CHEN Wenying YANG Xuerong YE Guofu ZHAI School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

Reliability is a crucial metric in aerospace *** results of reliability assessments for components like aerospace electromagnetic relays directly impact the development and operational reliability of aerospace engineering *** methods for analyzing the reliability of aerospace electromagnetic relays have limitations,such as neglecting the combined effects of multiple uncertain factors,degradation of key component properties,and the influence of fluctuations in aerospace ***,these methods often assume a single-type uncertainty in the manufacturing process,leading to significant deviations between the analysis results and actual measurement *** address these issues,this study proposes an efficient timedependent reliability analysis method based on the HL-RF algorithm,considering a hybrid of probabilistic and interval uncertainty that accounts for degradation and environmental *** proposed method is applied to the reliability analysis of actual aerospace electromagnetic relay products and compared with traditional methods,demonstrating significant *** proposed method has been applied to the time-dependent reliability analysis of actual aerospace electromagnetic relay products under different environmental *** analysis results exhibit an error margin within 5.12% compared to actual measurement *** to analysis methods solely based on probabilistic uncertainty quantification or interval uncertainty quantification,this method reduces the analysis error by 52% and 67% *** compared to two other state-of-the-art methods that integrate probabilistic and interval uncertainty quantification,the error reduction is 23%.These demonstrate the superiority of the proposed method and validates its *** presented approach has the potential to be extended for reliability analysis in other aerospace electromechanical systems.

关键词： Hybrid Uncertainty analysis Time series Reliability analysis Degradation Electromagnetic Relay

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Coordinated Dispatch Based on Distributed Robust Optimization for Interconnected Urban Integrated Energy and Transmission Systems

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Journal of Modern Power Systems and Clean Energy 2024年第3期12卷 840-851页

作者： Wei Xu Yufeng Guo Tianhui Meng Yingwei Wang Jilai Yu the School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

To improve the economic efficiency of urban integrated energy systems(UIESs)and mitigate day-ahead dispatch uncertainty,this paper presents an interconnected UIES and transmission system(TS)model based on distributed robust ***,interconnections are established between a TS and multiple UIESs,as well as among different UIESs,each incorporating multiple energy *** Bregman alternating direction method with multipliers(BADMM)is then applied to multi-block problems,ensuring the privacy of each energy system operator(ESO).Second,robust optimization based on wind probability distribution information is implemented for each ESO to address dispatch *** column and constraint generation(C&CG)algorithm is then employed to solve the robust ***,to tackle the convergence and practicability issues overlooked in the existing studies,an external C&CG with an internal BADMM and corresponding acceleration strategy is ***,numerical results demonstrate that the adoption of the proposed model and method for absorbing wind power and managing its uncertainty results in economic benefits.

关键词： Distributed robust optimization distributionally robust dispatch urban integrated energy system transmission system external column and constraint generation(C&CG) internal Bregman alternating direction method with multipliers(BADMM)

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An Orderly Power Utilization Method for New Urban Power Grids Facing Severe Electricity Shortages

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Journal of Modern Power Systems and Clean Energy 2024年第6期12卷 1710-1723页

作者： Rui Zhang Jilai Yu School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

Due to the effects of windless and sunless weather, new power systems dominated by renewable energy sources experience power supply shortages, which lead to severe electricity shortages. Because of the insufficient proportion of controllable thermal power in these systems, this problem must be addressed from the load side. This study proposes an orderly power utilization(OPU) method with load as the primary dispatching object to address the problem of severe electricity shortages. The principles and architecture of the new urban power grid(NUPG) OPU are proposed to complete the load curtailment task and minimize the effects on social production and daily life. A flexible load baseline division method is proposed that considers the effects of factors such as gross domestic product, pollutant emission, and carbon emission to increase the flexibility and applicability of the proposed method. In addition, an NUPG OPU model based on the load baseline is proposed, in which the electric quantity balance aggregator(EQBA) serves as a regular participant in the OPU and eliminates the need for other user involvement within its capacity range. The electric quantity reserve aggregator(EQRA) functions as a supplementary participant in the OPU and primarily performs the remaining tasks of the EQBA. The electric power balance aggregator primarily offsets the power fluctuations of the OPU. Case studies demonstrate the effectiveness and superiority of the proposed model in ensuring the completion of the load curtailment task, enhancing the flexibility and fairness of OPUs, and improving the applicability of the proposed method.

关键词： Electric power balance electric quantity balance electricity shortage orderly power utilization new urban power grid

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Research on power distribution control of parallel microgrid based on adaptive capacitor algorithm

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International Journal of Wireless and Mobile Computing 2023年第1期24卷 17-26页

作者： Tong, Zhanying Xu, Liutong School of Electrical Engineering and Automation Henan Institute of Technology Henan Province Xinxiang City China School of Mechanical and Electrical Engineering Henan Institute of Science and Technology Henan Province Xinxiang City China

In order to improve the stability and flexibility of microgrid operation, a droop control strategy for parallel microgrid power distribution based on adaptive virtual capacitor algorithm is proposed. The adaptive virtual capacitor is connected in parallel at the output of microgrid inverter to achieve accurate reactive power sharing of microgrid. The experimental results show that the average power sharing error of distributed generation under the control of adaptive virtual capacitor algorithm is 1.05%, which can effectively realise the accurate power distribution of microgrid and effectively avoid the problem of voltage drop. Add additional load to the system, and the distributed generation tends to be stable within 0.1s after a short transient process. The adaptive virtual capacitor algorithm has good adaptability to load changes, can effectively realise the accurate power distribution of parallel micro grid, and provides a new research idea for the operation optimisation of smart grid. Copyright © 2023 Inderscience Enterprises Ltd.

关键词： Reactive power

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An Improved Feedforward Control Strategy to Promote the Rapidity of PMSM Servo System and Reduce Overshoot Oscillation

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CES Transactions on electrical Machines and Systems 2025年第1期9卷 100-109页

作者： Wentao Zhang Yan Zhang Yongxiang Xu Jibin Zou School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

Under the condition of large inertia load,the stability of the servo system is more sensitive to the response speed and more likely to produce overshoot *** order to realize the requirements of high-precision and fast-response control of permanent magnet synchronous motor(PMSM)under large inertia load,an improved feedforward control strategy based on position impulse compensation and PD iterative algorithm is proposed to improve the response speed of the PMSM servo system and reduce the overshoot *** paper analyzes the mathematical models of the speed servo system and position servo system of the PMSM,calculates position overshoot impulse of the PMSM servo system,and improves the traditional feedforward control strategy to reversely compensate when the position is about to ***,in order to further reduce the position overshoot,the PD iterative control algorithm is superimposed without increasing the complexity of the *** input signal is continuously corrected through multiple runs to achieve a smoother response *** effectiveness of the proposed feedforward control strategy is verified by simulation and experiment.

关键词： Feedforward control Overshoot impulse Permanent magnet synchronous motor PD iterative control

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Review of Field Weakening Control Strategies of Permanent Magnet Synchronous Motors

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CES Transactions on electrical Machines and Systems 2024年第3期8卷 319-331页

作者： Runze Jing Gaolin Wang Guoqiang Zhang Dianguo Xu School of Electrical Engineering and Automation Harbin Institute of TechnologyHarbin 150001China

Due to high power density,high efficiency,and accurate control performance,permanent magnet synchronous motors(PMSMs)have been widely adopted in equipment manufacturing and energy transformation *** expand the speed range under finite DC-bus voltage,extensive research on field weakening(FW)control strategies has been *** paper summarizes the major FW control strategies of PMSMs,which are categorized into calculation-based methods,voltage closed-loop control methods,and model predictive control related *** existing strategies are analyzed and compared according to performance,robustness,and execution difficulty,which can facilitate the implementation of FW control.

关键词： Calculation-based methods Field weakening control Model predictive control Permanent magnet synchronous motor Overmodulation Voltage closed-loop control

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Resolver-to-Digital Conversion Based on Enhanced Single Degree-of-Freedom ADRC for Acceleration Position Error Suppression in PMSM Drives

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IEEE Transactions on Transportation Electrification 2025年第3期11卷 7184-7194页

作者： Tian, Minghe Gu, Jiaxin Yu, Yong Wang, Bo Xu, Dianguo Harbin Institute of Technology School of Electrical Engineering and Automation Harbin150001 China

The software-based resolver-to-digital conversion (RDC) systems, applied for acquiring accurate rotor position, are widely used in the permanent magnet synchronous motor (PMSM) drive system. However, when the PMSM speed changes, there is an acceleration rotor position error. This position error inevitably weakens the PMSM control performance in applications. To deal with this problem, this article proposes an enhanced single degree-of-freedom active disturbance rejection controller (SDOF-ADRC) for the RDC system to suppress the acceleration position error caused by PMSM speed change. In the proposed scheme, another error-based extended state observer (ESO) is added to the SDOF-ADRC, which is connected in series with the original error-based ESO to form a cascaded second-order observer. The original observer is applied to suppress the total disturbance in the system, while the added observer is a supplement to the original observer. It can suppress the remaining disturbances in the RDC system that cannot be suppressed by the original observer. Finally, the experimental results show that, compared with the proportional-integral (PI) controller and the traditional SDOF-ADRC, the proposed enhanced SDOF-ADRC can effectively suppress the acceleration position error caused by PMSM speed change. © 2015 IEEE.

关键词： Disturbance rejection

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Eliminating Common Mode Voltage and Suppressing Conducted EMI Based on Discontinuous PWM for General Two-Unit PMSMs

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IEEE Transactions on Energy Conversion 2025年第1期40卷 465-477页

作者： Xu, Yongxiang Gao, Haiyang Zhang, Wentao Li, Shaobin Zou, Jibin Harbin Institute of Technology School of Electrical Engineering and Automation Harbin150001 China

In high-power motor drive systems, the two-unit permanent magnet synchronous motor (PMSM) system driven by parallel inverters controlled by pulse width modulation (PWM) will generate significant common mode voltage (CMV) and conducted electromagnetic interference (EMI), which will have adverse effects on the system. In order to minimize this adverse effect, this paper proposes a modulation strategy based on discontinuous PWM (DPWM) that can completely eliminate the CMV of the two-unit PMSM to ground. This strategy selects only one zero vector within each carrier cycle and makes the switching states of the parallel inverters three "1"states and three "0"states at any time, significantly suppressing conducted EMI. The PWM waveforms within each carrier cycle are symmetrical, which significantly reduces the total harmonic distortion (THD) of the motor phase current compared to asymmetric PWM waveforms. The principle of the proposed strategy is introduced and the resulting switching loss of inverters is analyzed. The impact of deadtime is discussed, and the edges of PWM signals are improved to eliminate the CMV spikes caused by deadtime. The experimental results are provided to verify the effectiveness of the proposed strategy. © 1986-2012 IEEE.

关键词： Pulse width modulation

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