IET Power Electronics最新文献

{"title":"Optimized ultra high voltage gain DC–DC converter with current stress reduction for photovoltaic application","authors":"Ammar Falah ALgamluoli,&nbsp;Xiaohua Wu,&nbsp;Hayder K. Jahanger","doi":"10.1049/pel2.12726","DOIUrl":"10.1049/pel2.12726","url":null,"abstract":"<p>This paper presents a non-isolated DC-DC converter designed to validate ultra-high voltage gain using a modified double boost mode. The objective is to achieve exceptionally high voltage gain by integrating a modified triple boost technique (MTBT), interleaved with second main and auxiliary third MOSFETs, and a modified switched inductor-capacitor (MSLC), effectively doubling the voltage transfer gain. Furthermore, MSLC is combined with the auxiliary third and double main MOSFET to double the voltage gain while concurrently mitigating voltage stress on the auxiliary MOSFET and diodes in the proposed converter (the PC). Additionally, all diodes in the MTBT operate under zero current switching (ZCS) and the double main and auxiliary third MOSFET face very low current stress at ultra-high voltage gain. The input current of the PC remains steady without pulsating at a low duty ratio, making the PC more suitable for renewable energy systems. The PC offers numerous advantages, exhibiting high efficiency and ensuring minimal voltage stress on power devices with low current stress on the power switches. Notably, PC aims to elevate input voltages from 30 V to a variable output range of 335 to 600 V, delivering 440 watts at 96.1% efficiency.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12726","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141362441","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":"Guest editorial: Advances in conductive and wireless powering and charging technologies for transportation applications","authors":"Vincenzo Cirimele,&nbsp;Jianning Dong,&nbsp;Ahmed Mohamed,&nbsp;Jinhao Meng","doi":"10.1049/pel2.12713","DOIUrl":"https://doi.org/10.1049/pel2.12713","url":null,"abstract":"<p>Charging systems for electric transport are becoming more and more prevalent and are reaching increasingly high power levels now approaching megawatts in heavy-duty vehicle-related applications. This evolution is not only concerning conductive type systems commonly referred to as plug-ins. Alongside such systems, we are witnessing an increasing diffusion of wireless charging (WPT) systems that allow extreme flexibility in charging processes and open up the possibility of sending power to vehicles as they move. This would effectively eliminate the need for stops for charging and allow in some cases to drastically reduce the size of on-board batteries. For similar reasons, several projects are investigating the possibility of applying conductive type charging during vehicle motion as an alternative to the wireless option.</p><p>The development of all the technologies mentioned is not only in the automotive field but is touching all areas of electric mobility, from industrial handling to aerial and submarine vehicles.</p><p>Power electronics play a key role in all these applications. New possibilities, such as novel magnetic designs, wideband gap devices, advanced control techniques, and high-frequency magnetic materials, are being explored and developed.</p><p>This special issue aimed to collect articles presenting experimental studies, new ideas, and concepts, and providing a summary of all these aspects related to advances in conductive and wireless powering and charging technologies for all transportation applications.</p><p>The special issue received fifteen submissions. Nine of the originally submitted papers have been accepted after peer review, while six have been rejected. All of the papers mainly addressed power electronics control and the development of innovative conversion structures. One paper addressed a related aspect namely that of confinement of stray magnetic fields generated by charging applications. Finally, two papers are review papers on two different application areas of WPT technologies. A brief presentation of each of the papers in this special issue follows.</p><p>Yang et al. develop, in the form of a review, an analysis of the behaviour of inductive-type wireless systems in different media. The work focuses mainly on underwater applications and analyses the behaviour of the same WPT system immersed in fresh and seawater through experiments and simulations.</p><p>Mohamed et al.1 present a review that examines three different wireless technologies applicable to electric vehicles that are inductive and capacitive WPT and magnetic gearing. The paper also provides a comparative analysis of the technologies based on factors like power transfer efficiency, cost, and operating frequency. Research and development issues, capabilities, limitations, and potential applications, are also discussed.</p><p>Corti et al. introduce an approach for the design of LCC-S compensated inductive WPT systems based on a genetic algorithm. The ap","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12713","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141487898","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":"Adaptive-saturation-based transient stability enhancement for grid-following inverters","authors":"Jiawei Wang,&nbsp;Cheng Luo,&nbsp;Lei Wei","doi":"10.1049/pel2.12724","DOIUrl":"10.1049/pel2.12724","url":null,"abstract":"<p>This paper proposes an adaptive saturation module to enhance the transient stability of grid-following inverters after voltage-dip inception and fault-clearance moment. The equal-area criterion reveals that a large acceleration area will be obtained due to the step change of current reference according to grid codes, which may lead to the loss of synchronism with the grid. It is found that the saturation module used with the phase-locked loop can enhance the transient stability performance by reducing the acceleration area. To simultaneously adapt to the two cases (the inception and clearance of the voltage-dip fault), an adaptive saturation module that can automatically adjust the clamping mode is proposed, which is the main contribution of the paper. The selection of the threshold value for the saturation module is also presented. A comprehensive comparison is made between the proposed solution and state-of-art solutions. Finally, the effectiveness of the proposed control strategy is confirmed by the experimental tests.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12724","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141271647","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":"Optimization of battery/ultra-capacitor hybrid energy storage system for frequency response support in low-inertia microgrid","authors":"Philemon Yegon,&nbsp;Mukhtiar Singh","doi":"10.1049/pel2.12723","DOIUrl":"10.1049/pel2.12723","url":null,"abstract":"<p>Modern power system networks are under statutory obligations to integrate renewable energy sources (RES). The primary reason is to meet ever-increasing energy demand and also to curtail environmental pollution by greenhouse gases. However, the higher penetration of RES has the tendency of reducing inertia of overall power system network. Consequently, frequency stability is affected and deviates beyond allowable permissible limits leading to power blackouts, load shedding, and even total system failure. To address the issues associated with reduced inertia, an optimal control of hybrid energy storage system (HESS) has been proposed. HESS is basically a combination of battery and ultracapacitor, where ultracapacitor addresses rapidly varying power component by mimicking inertia while the battery compensates long-term power variations. Thus, the HESS is effectively controlled to compensate the loss of inertia by regulating its energy flow. For the purpose of improved efficiency and better power management of the HESS, an improvised particle swarm optimization (MPSO)-based virtual inertia control design has been proposed. The proposed MPSO is utilized to tune the gains of bidirectional dc–dc converter in such a way that improves frequency nadir with faster response to transient disturbances. This proposed method is simulated in MATLAB and its merits are validated in real time using hardware in loop. On analysing of the results, it can be observed that frequency nadir is improved by 48.96% with significant reduction in rate of change of frequency in comparison to conventional particle swarm optimization.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-06-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12723","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141272526","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 capacitance reduction method of hybrid modular multilevel converter based on multi-harmonic voltage injection","authors":"Hongxu Li,&nbsp;Qin Wang,&nbsp;Qunfang Wu,&nbsp;Lan Xiao,&nbsp;Jinbo Li,&nbsp;Qi Chen","doi":"10.1049/pel2.12722","DOIUrl":"https://doi.org/10.1049/pel2.12722","url":null,"abstract":"<p>In a modular multilevel converter (MMC) system, the sub-module (SM) capacitors account for a large proportion of cost, volume and weight. Increasing modulation index (<i>m</i>) is an effective method to reducing the capacitance. Traditional MMC based on half-bridge SM (HBSM) cannot boosting <i>m</i> while the hybrid MMC composed of HBSMs and full-bridge sub-modules (FBSM) can increase the <i>m</i>. The negative voltage is required when hybrid MMC works at the boosted <i>m</i>, which is only provided by the FBSMs because the HBSMs cannot output negative voltage. Therefore, appropriate control strategies are needed to achieve the normal operation of hybrid MMC under boosted <i>m</i>. This paper presents a control method suitable for hybrid MMC with high <i>m</i> based on multi-harmonic voltage injection. The <i>m</i> is increased to 1.41 with the proposed multi-harmonic voltage injection. Compared with the HBSM-MMC, the proposed method reduces the total capacitance by more than 32%. Boosting <i>m</i> also reduces the RMS and peak value of the arm current by 18%. A comprehensive comparison was presented to demonstrate the cost and effect. Simulation and experiment verified the proposed method.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12722","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142359818","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":"Identifying the plane position of the receiver coil in a multi-transmitter IPT system through the identification of parameters","authors":"Da Li,&nbsp;Pan Sun,&nbsp;Xusheng Wu,&nbsp;Yan Liang,&nbsp;Yilin Liu","doi":"10.1049/pel2.12717","DOIUrl":"https://doi.org/10.1049/pel2.12717","url":null,"abstract":"<p>The study introduces a method for identifying the location of receiver coils within a multi-transmitter IPT system that utilizes shared transmitter coils. In contrast to the conventional receiver coil position recognition methods, this approach eliminates the need for additional detection coils and position sensors. Identifying the location of the receiver coil in a multi-transmitter IPT system is achieved through the concurrent optimization of the transmitter coil and its electrical characteristics. The study presents the design of coil grouping and control mechanisms for a 3×3 multi-transmitter. A mathematical model has been developed for the mutual inductance between receiver and transmitter coils on the <i>X</i>–<i>Y</i> plane. Adaptive cooperative particle swarm optimizer (ACPSO) facilitates the identification of mutual inductance and load parameters in a multi-transmitter IPT system, positioning the receiver coil in a 2D plane using genetic particle swarm optimization (GAPSO) and a mutual inductance mathematical model. The discrepancy in accuracy between the receiver coil's test coordinates and the absolute coordinates remains below 3.5%.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12717","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021756","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 fixed-frequency control method for wireless power transmission battery chargers using a dual-function compensator","authors":"Sina Bajelvand,&nbsp;Amir Babaki,&nbsp;Alireza Jafari-Natanzi,&nbsp;Ali Yazdian Varjani,&nbsp;Sadegh Vaez-Zadeh","doi":"10.1049/pel2.12703","DOIUrl":"https://doi.org/10.1049/pel2.12703","url":null,"abstract":"<p>High efficiency and unity power factor (PF) are the most important requirements of a wireless charger system simultaneous with the output voltage regulation. Achieving all above-mentioned criteria in a wide range of the load is challenging in the system. This paper presents a novel control approach applied to series-series wireless power transmission converter by using a dual-function compensator to achieve unity PF and maximum efficiency during the constant power-constant voltage (CP-CV) charging scenarios. A semi-active rectifier with impedance matching capability along with a switch-controlled capacitor constitutes the dual-function compensator on the secondary side. Meanwhile, the primary side inverter executes the CP-CV charging scenario for the battery with various charging characteristics at a fixed-switching frequency. Besides that, all secondary side switches experience soft switching condition throughout the battery charging. Finally, a prototype with a power of 200 W and roughly regulated efficiency of 90% is presented in order to verify the proposed control method.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12703","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141488914","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":"Research on power quality improvement system based on dynamic voltage restorer","authors":"Ancheng Liu,&nbsp;Yipei Wang,&nbsp;Yaochen Zhu,&nbsp;Sung-Jun Park","doi":"10.1049/pel2.12696","DOIUrl":"https://doi.org/10.1049/pel2.12696","url":null,"abstract":"<p>Power quality is a critical issue in power systems that can affect the performance and reliability of sensitive equipment. The dynamic voltage restorer (DVR) is a widely used technology for improving power quality, but it mainly focuses on mitigating voltage sags and often neglects the issue of harmonic distortion. This paper proposes a DVR voltage compensation strategy based on the discrete Fourier transform (DFT). This strategy utilizes the DFT to analyze the voltage waveform, separating the fundamental and desired harmonic components. With this strategy, the DVR can effectively compensate for voltage sag and achieve selective harmonic compensation, thereby improving the power quality of the power system. Additionally, a method utilizing hardware circuitry and an LED as a timestamp is proposed to dynamically estimate digital siginal processor (DSP) resource occupancy rate in real-time, ensuring effective compensation while minimizing resource occupancy. A 3 kW DVR experimental prototype was constructed and tested to evaluate the practicality of the proposed strategy. The simulation and experimental results show that the method proposed in this paper successfully realizes the compensation of voltage sag and harmonics in the power system, and improves the stability and reliability of the power system.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12696","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021778","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 WDOB-based strategy endows droop-controlled grid-forming converters better dynamic and static performance in DC microgrids","authors":"Wenqiang Xie,&nbsp;Xian Zheng,&nbsp;Mingming Shi,&nbsp;Tiankui Sun","doi":"10.1049/pel2.12710","DOIUrl":"https://doi.org/10.1049/pel2.12710","url":null,"abstract":"<p>The droop control strategy is popularly employed in DC microgrids. However, its virtual resistance will cause voltage deviation and reduce transient response. The DOB-based method is proven to improve transient response in literature. However, it is analyzed in this study that this method will negatively influence the current sharing when employed in droop control. A weakened disturbance observation (WDOB) is proposed in this work to improve the drawbacks. To employ the proposed method, the equivalent models of the droop controller and the physical system are separately established, and several transformations are conducted. An auxiliary compensation is added and the current loop is considered as a whole to be transmitted into the control plant, making the traditional DOB method successfully adopted. It is obvious that the dynamic performance is improved, but it disabled virtual resistance in the steady-state. And the current sharing cannot be achieved in a multi-converter parallel system. The reason for this problem is analyzed from the control process and transfer function, and the WDOB solution is finally proposed. Through the proposed method, both aims of improving dynamic response and current sharing can be achieved, and the steady voltage deviation is much less than that of the traditional droop controller.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12710","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021779","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":"An analytical calculation method of SiC MOSFET junction temperature based on thermal network theory and Laplace transform","authors":"Lina Wang,&nbsp;Hongcheng Qiu,&nbsp;Liman Zhang","doi":"10.1049/pel2.12708","DOIUrl":"https://doi.org/10.1049/pel2.12708","url":null,"abstract":"<p>In order for full utilization of the switching devices and safe continued operation of the power converter at the same time, the junction temperature of the switching devices needs to be accurately monitored without shutting down the motor drive. This paper derives an analytical junction temperature calculation method by using Laplace transformation and thermal network theory. Based on an actual motor drive, a simulation model is established using platform for power electronic systems (PLECS). Through comparison, the derived method is proven to be able to calculate junction temperature accurately.</p>","PeriodicalId":56302,"journal":{"name":"IET Power Electronics","volume":null,"pages":null},"PeriodicalIF":1.7,"publicationDate":"2024-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1049/pel2.12708","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142021780","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}