IET Power Electronics最新文献

{"title":"Front Cover: Integrated DC arc model and DC arc detection approach based on K-line diagram and spectrum integral difference","authors":"Qing Xiong,&nbsp;Junyi Zhang,&nbsp;Jianghan Li,&nbsp;Yijie Tang,&nbsp;Yi Zhuang,&nbsp;Yanjie Cui,&nbsp;Rui Li,&nbsp;Shengchang Ji","doi":"10.1049/pel2.70042","DOIUrl":"https://doi.org/10.1049/pel2.70042","url":null,"abstract":"<p>The cover image is based on the article <i>Integrated DC arc model and DC arc detection approach based on K-line diagram and spectrum integral difference</i> by Qing Xiong et al., https://doi.org/10.1049/pel2.12849.\u0000\u0000 <figure>\u0000 <div><picture>\u0000 <source></source></picture><p></p>\u0000 </div>\u0000 </figure></p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70042","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143877796","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Improved Modulation Technique in Cascaded H-Bridge Inverters for Fault-Tolerant With Full Bridge Single Phase Rectifier Structure","authors":"Kasra Khalili,&nbsp;Jalal Nazarzadeh","doi":"10.1049/pel2.70040","DOIUrl":"https://doi.org/10.1049/pel2.70040","url":null,"abstract":"<p>This paper presents a novel fault-tolerant approach for cascaded H-bridge inverters with a full-bridge single-phase rectifier cell structure. Upon a fault, the faulty cell is disconnected from the circuit, and the inverter switches from normal operation (symmetric mode) to faulted operation (asymmetric mode). In asymmetric mode, one of the full-bridge single-phase rectifier cells in the faulty phase transitions from a full-bridge to a half-bridge configuration. The level-shift pulse-width modulation (PWM) is employed during symmetric mode, while a modified level-shift PWM is utilized in asymmetric mode. The inverter's output power and voltage remain unchanged during faults in the modified PWM method. Additionally, the performance of the proposed fault-tolerant algorithm is evaluated and validated using results from simulations and an experimental prototype of a seven-level inverter.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70040","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143871817","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Robust Model-Free Predictive Current and Speed Control of PMSM Drive Based on Nonlinear Disturbance Observer","authors":"Mohammad Bagher Sepahkar,&nbsp;Abolfazl Halvaei Niasar","doi":"10.1049/pel2.70041","DOIUrl":"https://doi.org/10.1049/pel2.70041","url":null,"abstract":"<p>Model predictive control has recently attracted the attention of researchers in control of permanent magnet synchronous motor drives due to advantages such as simple concepts and fast dynamics. However, it is highly sensitive to changes in motor parameters and unmodelled uncertainties. To solve this problem, a model-free predictive control based on an ultra-local model is proposed in this paper, which uses only the input and output of the system based on nominal parameters. To enhance the drive performance and simplification of implementation, current control, and speed control are performed simultaneously based on the optimization of a cost function without using any PI speed or PI current controller. In the proposed method named ‛model-free predictive current and speed control′ (MFPCSC), to reduce the sensitivity to model parameters and uncertainties, a nonlinear disturbance observer (NDO) is used, which accurately estimates all uncertainties and the effect of parameters’ change. The proposed MFPCSC-NDO control method has good behaviour in tracking the speed and current reference values and has high robustness to parameter changes. The performance of the proposed method is compared with two methods of model-based predictive current control and model-free predictive current control by simulation and its behaviour is confirmed with experimental results.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70041","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143865766","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"DC Microgrid Islanding Detection Method Based on RUSBoost Algorithm","authors":"Na Zhi,&nbsp;Jilin Qiu","doi":"10.1049/pel2.70037","DOIUrl":"https://doi.org/10.1049/pel2.70037","url":null,"abstract":"<p>With the widespread integration of distributed power sources, DC microgrids (DCMGs) have become an important component of the new smart grid. Detecting unintentional islanding, defined as the inadvertent disconnection of distributed generators (DGs) from the utility grid, is a significant challenge for DC microgrids. When in near-zero power mismatch, the traditional passive over/under voltage islanding detection method will enter the non-detection zone (NDZ), and the active islanding detection method will compromise power quality due to the injection of disturbance signals. This paper proposes a passive islanding detection method based on Random Under Sampling Boost (RUSBoost) for DC microgrids. Initially, this method selects and extracts effective electrical feature metrics during DC microgrid islanding event occurrences, followed by the collection of historical grid operation data. The RUSBoost algorithm from machine learning (ML) is employed to train and create a model for classifying islanding events. This method divides the islanding detection issue as a binary classification issue, enabling precise differentiation between the grid-connected and islanding states. This method achieves passive detection without NDZ and has the advantages of an automatic threshold setting, fast detection speed, and high accuracy. Simulation and experimental results demonstrate that this method can detect unintentional islanding quickly and precisely.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70037","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143857017","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A high power density magnetically integrated scheme of LLC converter","authors":"Lei Li,&nbsp;Feng Hong,&nbsp;Minggang Chen,&nbsp;Qinsong Qian","doi":"10.1049/pel2.70006","DOIUrl":"https://doi.org/10.1049/pel2.70006","url":null,"abstract":"<p>To improve efficiency and power density within LLC converters, this paper presents a magnetically integrated scheme through the magnetoresistive model, which includes a resonant inductor and a transformer on one magnetic core. A magnetoresistive model is proposed to analyse the magnetic flux and is verified by simulation. Further, this paper investigates the fringing field near the core's air gap to prevent the occurrence of overheating and chaotic winding current distribution, optimizing the shapes of the transformer's secondary winding and core. A half-brick (2.28″ × 2.4″ × 0.5″) LLC converter with a peak efficiency of 94.8% is then constructed using these integrated magnetic components, achieving a power density of 452 W/in.³, and maintaining a lower operating temperature of the core.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70006","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143850987","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Control Scheme for Load Side Converter of Stand-Alone Doubly Fed Induction Generator","authors":"Mojtaba Pourjafari,&nbsp;Esmael Fallah Choolabi","doi":"10.1049/pel2.70036","DOIUrl":"https://doi.org/10.1049/pel2.70036","url":null,"abstract":"<p>In this paper, a simple and novel control strategy for a stand-alone doubly fed induction generator (DFIG)-based wind turbine under combined unbalanced and non-linear loads is presented. These types of loads cause negative sequence and harmonics in the stator voltage and current, which leads to power and torque oscillation. As a solution, a new control strategy is presented in the load side converter (LSC) which compensates for the stator current and voltage, simultaneously. The instantaneous active and reactive power theory is used to extract all of the harmonic components of the stator current and voltage. Based on the presented papers, the main task of LSC is to compensate for the stator current. In our proposed method, the per-unit values of stator voltage harmonics are added to the LSC's reference signals. Because the resulted reference signals are sinusoidal, the proportional-resonant (PR) controller is used to track the sinusoidal references. Therefore, the stator voltage is compensated in addition to the stator current for all types of loads, and the rotor side converter is only required to control the voltage amplitude and frequency. The harmonic components are extracted by algebraic equations. So, the system has a fast dynamic response, which is suitable for practical implementation. To validate the presented control strategy, simulation and experimental implementation for a 5.5 kW DFIG are done in the paper.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70036","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Novel 4H-SiC MOSFET With High-K/Low-K Dielectric for Improved Frequency Characteristics","authors":"Jiaxing Chen,&nbsp;Juntao Li,&nbsp;Lin Zhang","doi":"10.1049/pel2.70033","DOIUrl":"https://doi.org/10.1049/pel2.70033","url":null,"abstract":"<p>Split-Gate MOSFET (SG-MOSFET) is promising in power-switching circuits due to the fast turn-on/off speed and low switching loss. However, in higher-frequency applications, the gate architecture needs to be changed to obtain the improved high-frequency figure of merit (HF-FOM) over the SG-MOSFET. In this paper, a planar split-gate SiC MOSFET with Low-K (nanoporous SiCOH) gate-source dielectric and High-K (HfO₂) source field-plate dielectric (named LHK-MOSFET) is proposed and investigated by numerical simulations. As for the proposed MOSFET, the High-K field-plate dielectric helps reduce semiconductor bulk capacitance (<i>C</i>_SiC), thereby reducing the gate-drain capacitance (<i>C</i>_GD). Besides, the Low-K gate-source dielectric helps to reduce the gate-source insulation layer capacitance (<i>C</i>_IL). When compared to the SG-MOSFET with a source field plate (SFP-SG-MOSFET) and SG-MOSFET, the gate-drain capacitance (C_GD) of the proposed MOSFET is reduced by 35.8% and 73.0%, and the gate-drain charge (<i>Q</i>_GD) is reduced by 26.9% and 62.3%, respectively. It is calculated that the HF-FOM (<span></span><math>\u0000 <semantics>\u0000 <mrow>\u0000 <msub>\u0000 <mi>C</mi>\u0000 <mrow>\u0000 <mi>G</mi>\u0000 <mi>D</mi>\u0000 </mrow>\u0000 </msub>\u0000 <mo>×</mo>\u0000 <msub>\u0000 <mi>R</mi>\u0000 <mrow>\u0000 <mi>o</mi>\u0000 <mi>n</mi>\u0000 <mi>s</mi>\u0000 <mi>p</mi>\u0000 </mrow>\u0000 </msub>\u0000 </mrow>\u0000 <annotation>${C}_{GD} times {R}_{onsp}$</annotation>\u0000 </semantics></math>) of the proposed MOSFET is reduced by 35.2% and 71.0% compared to SFP-SG-MOSFET and SG-MOSFET, respectively. The improved performance indicates that the proposed device is a competitive choice for high-frequency power electronic systems.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70033","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143836223","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A New Step-Up DC/DC Converter With Low Voltage and Current Stresses","authors":"Sara Hasanpour,&nbsp;Sze Sing Lee","doi":"10.1049/pel2.70032","DOIUrl":"https://doi.org/10.1049/pel2.70032","url":null,"abstract":"<p>This paper presents a new high-voltage gain DC/DC converter for renewable energy applications. This converter can provide an ultra-high voltage gain in a low-duty cycle. Moreover, a three-winding coupled-inductor (TWCI) is combined with a quadratic boost circuit to extend the voltage gain ratio, which indicates more design flexibility. Also, the tertiary winding side of TWCI acts as a semi-trans-inverse manner. Thus, higher voltage gains can also be achieved at a very low number of turn ratios. Regenerative passive clamp circuits absorb and recycle the energy of the leakage energy of the TWCI and also mitigate voltage stresses of the active switches which are operated in simultaneous switching patterns. The main features of the suggested structure are its ultra-high voltage gain, low reverse recovery in diodes, low voltage stress across the switches, continuous input current with low ripple, and common ground between the input and output sides. The current sharing between the TWCI and input inductor minimizes the power loss of the magnetic components of the proposed circuit. Detailed steady-state and power loss analyses, as well as design considerations, are provided. Finally, a sample prototype (200 W, 25 V–400 V) is implemented to reconfirm the given theories.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70032","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143840854","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A 19-Level Single Voltage Source Inverter With Reduced Blocking Voltage on Switches","authors":"Fatemeh Esmaeili,&nbsp;Hamid Reza Koofigar","doi":"10.1049/pel2.70034","DOIUrl":"https://doi.org/10.1049/pel2.70034","url":null,"abstract":"<p>This paper presents a novel high-performance and dependable step-up multi-level inverter topology designed specifically for photovoltaic applications. A gain factor of nine is attained, coupled with automatic self-voltage balancing of capacitors and the intrinsic capability to generate both positive and negative voltage levels. All power switches withstand voltages lower than the peak of the output voltage. The quantity of power switches, DC input sources, and the blocking voltage on the switches are reduced. Also, the proposed inverter demonstrates a minimal cost function in comparison to similar topologies. The performance of the 19-level step-up inverter has been confirmed through simulation as well as laboratory results obtained from a constructed prototype.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70034","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143818412","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Conducted EMI Noise Modelling for DC–DC Converters Based on the Time-Domain Measurements","authors":"Reza Amjadifard,&nbsp;Farhad Bagheroskouei,&nbsp;Vali Talebzadeh","doi":"10.1049/pel2.70026","DOIUrl":"https://doi.org/10.1049/pel2.70026","url":null,"abstract":"<p>Switch mode power supplies (SMPSs) are the source of radiated and conducted EMI noise. The radiated part is usually mitigated by adding proper shielding. The conducted part propagates through the input and output terminals to the power lines and loads. The most common approach to attenuate the conducted noise is benefiting the EMI filter. Implementation of an EMI filter needs to have some information about the source of noise, such as its impedance and amplitude. This information could be obtained by applying proper approaches, categorised into lumped or behavioural methods. In this paper, a behavioural method (spectral analysis) is used to model the conducted EMI noise, generated by a DC–DC converter. The proposed method can estimate the transfer function of both common mode (CM) and differential mode (DM) noise separately. Time domain data is used to identify model, utilising an uncomplicated setup. The experimental results are presented to verify the theory of the suggested method. The results show, there is less than a 5 dB deviation between the obtained model and the verification data set. Also, an EMI filter and a notch filter have been implemented based on the extracted model to show the effectiveness of the suggested method in practice.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":"18 1","pages":""},"PeriodicalIF":1.7,"publicationDate":"2025-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.70026","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143809407","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}