Introduction

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CPSS Transactions on Power Electronics and Applications is sponsored and published by China Power Supply Society and technically co-sponsored by IEEE Power Electronics Society. It publishes original and high-quality peer-reviewed papers in the field of power electronics and its applications. With the goal of promoting the technology of power electronics including concepts, theory, modeling and control, analysis and simulation, emerging technology and applications, CPSS TPEA is expected to be a favorable platform to strengthen information exchange in this area. All accepted papers will be published in IEEE Xplore(Early-Access and Published Issue)and be indexed in Ei Compendex.

SCOPE
    • Switching Power Supply: DC/DC Converter, Power Factor Correction Converter

    • Inverter and Control: DC/AC Inverter, Modulation and Control

    • Power Devices and Applications: Si, SiC and GaN Devices

    • Magnetics, Passive Integration, Magnetics for Wireless and EMI

    • Control, Modeling, Simulation, System Stability and Reliability

    • Conversion Technologies for Renewable Energy and Energy Saving

    • Power Electronics Applied to Transmission and Distribution Systems

    • Power Electronics Applied to Electric Vehicles and Railway Systems

    • Power Electronics Applied in Lighting and Consumer Electronics


Call for Papers

With the goal of promoting the technology of power electronics, CPSS TPEA is expected to be a favorable platform to strengthen information exchange in this area through publishing and disseminating research findings worldwide. Authors are cordially invited to submit your papers through the website.

The objective of this journal is to finish the 1st round review within 6 weeks from submission.

Current Issue

CPSS TPEA Vol.8 No.4 (December 30, 2023)


Regular Papers

Stability Margin Evaluation of Black-Box Power Distribution Systems in a Wide Load Range

Z. Chen, J. Qi, X. Chen, and J. Xu

Abstract Power module-based power distribution systems (PDSs) are extensively used in modern power conversion applications. However, the power modules usually do not provide internal topology circuit and modulation information, which makes it difficult to evaluate system stability by the general white box approaches. Alternatively, this paper proposes perturbation-based impedance ratio stability analysis steps, which offer stability evaluation over a wide load range and it does not require the circuit or modulation information. Firstly, the theoretical impedance ratio measurement circuit is explained with the stability criterion. Then, the analysis steps are introduced to show how the system stability margin over different loads can be evaluated by the 3-dimensional (3-D) fitting bode plot surface. Four typical module-based PDSs with seven completely different power converters are exemplified in the simulation for case studies. Finally, the correctness of the evaluated stability margins of the four studied PDSs in different loads are verified by the time-domain simulation waveforms, respectively.


Wideband Dissipativity Enhancement of Grid-Following Inverters Using Virtual Element Design

Z. Yang, W. Wu, H. Li, L. Ding, S. He, and F. Blaabjerg

Abstract Dissipativity provides a convenient approach to predict system stability, which explains the induced resonances from the perspective of damping. To mitigate potential resonances and improve stability, this work presents a design method to enhance the dissipativity of grid-following inverters over a wide frequency range. Based on the dq-domain admittances, the frequency-domain dissipativity affected by different control loops and the time delay are investigated. By designing virtual elements, the dissipativity in different frequencies can be flexibly enhanced. A model-based design criterion is proposed to tune the control parameters following a model-based approach. The design method is presented for a high-power inverter system. The effectiveness of the method is also proved with a down-scaled prototype, which includes simulations, experiments, and dissipativity analysis.

 

Advanced Solid-State Lithium Battery and Its Safety

Z. Zhao, H. Hu, Z. He, H. Zhu, P. Davari, and F. Blaabjerg

Abstract Solid-state lithium battery (SSLB) is considered as the most potential energy storage device in the next generation energy system due to its excellent safety performance. However, there are still intimidating safety issues for the SSLB, due to it being still in the development stage. This paper gives an overview of the safety of SSLBs. First, advanced solid-state battery techniques are introduced. Second, the safety issues of SSLBs are discussed. Then, the safety enhancement techniques are provided. Finally, future research opportunities are presented. This paper aims to provide a reference for researchers in the fields of electronic and electrical engineering who want to make some efforts in SSLB safety.

 

Partial Discharge Features of Insulation for Power Electronic Transformers Under Time-Temperature Ageing

W. Zhang, J. Jiang, B. Li, Z. Shen, G. Ma, and C. Zhang

Abstract Under the combination of temperature and high frequency electrical stress, partial discharge (PD) intensity will increase at the insulation system of power electronic transformer (PET), which leads to premature insulation failure, and finally threatens the reliability of PET. In order to obtain PD features under high frequency square wave voltage combined with high temperature, and different aging time of insulation system in PET. A combined electric-thermal experiment platform is established to simulate the discharge characteristics of typical insulation dielectric films (polyimide, PI) under temperature from 80~155 °C and ageing time from 0~50 h respectively. The variation trend of discharge repetition rate, average discharge amplitude and the shape of phase resolved partial discharge (PRPD) spectrum are considered, and then the discharge mechanism is analyzed. The experimental results show that the rise of temperature contribute to the augmentation of discharge repetition rate and the average discharge amplitude, with an increase in amplitude from 0.3V to 0.6 V, and the phase of the discharge signal widens. As the ageing time goes up, the discharge repetition rate and the average discharge amplitude increase too, but the change is most obvious in the early aging period, leaping from 0.2V to 0.32 V. It is of practical value to reveal the mechanism of high frequency electro-thermal stress and improve the operation reliability of power electronic transformer.

 

A Wide Range Dual-Output Power Management Circuit for I-Shaped High Frequency Magnetic Field Energy Harvester

H. Peng, H. Xiao, Q. Nie, C. Zang, and Y. Kang

Abstract A high power density non-intrusive magnetic field energy harvester (MEH) and dual-output power management system are proposed in this paper, targeting at widely distributed online monitoring devices for HVDC IGBT converter valves. IGBT converter valves contain sufficient kHz magnetic field due to the periodic switching of IBGT devices. High frequency MEH has the advantage of high power density. An improved I-shaped core is proposed with equivalent permeability studied and engineering practical design guidance for magnetic flux convergence. Furthermore, a wide input range dual-output power management circuit is proposed for wide magnetic intensity variations. A dual energy flow strategy is adopted with combined boost energy conversion path and buck-boost energy conversion path for better utilization of harvested energy. PCB planar coils and PCB based power management system are packaged inside the I-core to eliminate the electromagnetic interference on the low power circuit. The power density of the proposed MEH reaches to 1.89 mW/cm 3 under magnetic flux density amplitude of 500 μT at 1500 Hz. The maximum efficiency of the boost path in the charging process reaches to 94.1% and the average efficiency for buck-boost path in the discharging process from 4.0 V to 0.3 V is 68.0%.

 

Hardware Implementation of Sensor-Less Matrix Shifting Reconfiguration Method to Extract Maximum Power Under Various Shading Conditions

V. C. Chavan and S. Mikkili

Abstract Partial Shading Conditions severely deteriorates the power generation of the photovoltuic (PV) array. For conventional PV array configurations like total cross tide, bridge link, honey comb, etc., partial shading condition inserts multiple peaks in the power voltage curve of PV array. This results in mismatch power losses and a reduction in the power generation capability of the PV array. This paper proposes a new reconfiguration method to increase PV power generation by shade distribution. This paper presents a new physical repositioning technique, a magic matrix shifting (MMS) method. The proposed PV array reconfiguration performance has been compared with available reconfigurations. It includes sudoku (SK), optimum sudoku (OSK), zigzag (ZZ), magic square (MS), skyscraper (SS), and novel shade dispersion (NSD). The performance has been investigated under uneven row (UR), uneven column (UC), triangular corner (TC), L shape (LS), left top corner (LTC), center (CT), short wide (SW), long wide (LW), short narrow (SN), long narrow (LN), random 1 (RM1) and random (RM2) shading condition. This work uses MATLAB/Simulink to model a 36, 213W, 6×6 PV array construction. The performance of the MMS method has been validated on an experimental setup up of 4×4 PV array construction on a real-time PV chroma emulator.

 

Scalability Assessment of the Parallel Operation of Direct Current Transformer

R. P. Barcelos and D. Dujic

Abstract Paralleling duty-cycle controlled high-power converters is well understood while achieving the same with uncontrolled resonant converters poses certain challenges. In order to predict the current sharing unbalance after paralleling several direct current transformers, this paper proposes a methodology to define the quality of the parallel connection considering system-level parameters. Based on the input impedance of the small signal model, critical parameters are identified, and the impact of the different levels of parameter variation on the current sharing of direct current transformers is evaluated. Then, design constraints based on the model are set to achieve satisfying current sharing considering the resultant input impedance. Further, the impact of the switching frequency, considered the only design degree of freedom, on the input impedance is used to modify the current sharing between the modules. Modeling and predictions are verified by means of simulation and experimental investigations.

 

High Frequency Current-Fed Isolated Auxiliary Power Supply for Medium-Voltage Converter

B. Zhou, Z. He, Z. Li, K. Chen, A. Luo, and L. Wang

Abstract In this paper, a high frequency current-fed isolated auxiliary power supply (HFCF-APS) is proposed for medium-voltage module stack converters. Unlike conventional anxiliary power supplys (APSs), the proposed HFCF-APS can realize galvanic isolation with a single high-voltage insulation cable. The HFCF-APS can flexibly extend its output number as the converter needs. Two secondary compensation topologies, capacitor-inductor (CL) and capacitor-capacitor (CC), are proposed to allow the HFCF-APS to extend the output number wide range without modifying circuit parameters and losing the soft-switching conditions of the power switches on the primary side. Moreover, two logical control circuits corresponding to the CL and CC compensation topologies are designed with a few additional components. As a result, all output channels are immune to load short and open circuits, so the reliability of the HFCF-APS is improved. To demonstrate the validity of the proposed HFCF-APS, simulations and experiments of an HFCF-APS prototype of 8-12 channels with 10 W output each are carried out. The results verify the extendibility and reliability and indicate that the proposed HF-CF-APS offers a superior solution for multi-output APS.

 

A Self-Tuning ANFIS DC Link and ANN-LM Controller Based DVR for Power Quality Enhancement

P. Kumar, S. R. Arya, K. D. Mistry, and S. Yadav

Abstract An artificial intelligence integrated control is proposed for a three-phase dynamic voltage restorer (DVR). The proposed Levenberg-Marquardt back-propagation (LMBP) algorithm is developed by employing intelligent computational system under supervised learning. The optimized artificial neural network (ANN) model is used for the fundamental computation of load voltage components through the training process. The common training problem of ANN models are slow learning of system and get trapped in local optimum. The proposed LMBP hybridized learning system reduces the error rate and taking this advantage it overcomes the aforesaid issue. It is integrated with the adaptive neuro-fuzzy inference system (ANFIS) controller for regulating the DC and AC link voltage error. In the proposed design of ANN-AN-FIS based DVR, a hybrid learning algorithm and Gaussian membership functions are applied to extract the best forecasted ANFIS models. The trained model accuracy is evaluated based on statistical indices. The obtained values during the training state for DC link voltage error regulation are mean square error (MSE = 0.00054585), standard deviation (SD = 0.023364), and regression (R = 1) are found effective for the approximation of ANN-LMBP model. The simulation results obtained from ANN-LMBP, and ANFIS models were tested on MicroLab Box experimentally which shows the improved power quality response at various operating conditions.

 

Magnetic Interference Suppression of Tunnel Magnetoresistance Current Sensor in Power Converters

H. Chen, W. Lin, S. Shao, and J. Zhang

Abstract Tunnel magnetoresistance (TMR) sensor is a promising candidate for current sensing with non-invasively measuring and very small footprint. However, in power converter products, the surrounding PCB tracks and magnetic components will generate magnetic fields, thereby affecting the current sampling accuracy of the TMR. This paper analyzes the influence of parallel and crossed PCB track currents and magnetic components in the power converter on the TMR measurement results and proposes methods to suppress magnetic field interference. For parallel PCB tracks, the design of spacing is used to reduce the interference, and the calculation of minimum spacing is given. A reasonable crossing angle design can reduce the crossed conductors' magnetic interference. For magnetic components, this paper selects the optimal installation position and layout to improve the detection accuracy of TMR. A prototype was built to demonstrate the feasibility of the proposed methods. With the optimized layout, the interference from parallel PCB tracks, cross tracks and magnetic components can be effectively suppressed, and the measured interference ratios are all within 5%.

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Editor-in-Chief

Prof. LIU Jinjun

College of Electrical Engineering

Xi'an Jiaotong University

No.28, Xianning West Road, Xi'an,

Shaanxi, 710049, China

jjliu@mail.xjtu.edu.cn



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  • IEEE Power Electronics Society (IEEE PELS)
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  • IEEE Trans. on Power Eletronics (IEEE TPEL)
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