International Journal of Power Electronics (4 papers in press)

Regular Issues

• On the common mode current reduction in induction motor fed by three-level NPC inverter for pumping photovoltaic application  
  by Zouhaira Ben Mahmoud, Adel Khedher 
  Abstract: The presence of common mode voltage (CMV) poses a significant challenge in motor drive applications. Particularly, for Photovoltaic Pumping (PVP) systems, the high-frequency fluctuations of CMV can induce a common mode current (CMC). These challenges not only diminish the lifespan and the reliability of the motor and PV panel but also present safety problems. This work suggests a novel space vector modulation (SVM) for three level NPC (3L-NPC) converter fed induction machine (IM). The proposed SVM simplifies the 3L space vector diagram (SVD) to six two level (2L) diagrams. The synthesis of the zero voltage vector is then achieved through a virtual approach, combining two active vectors. The principal features of the latter are low complexity, low computation burden, reduced CMV and leakage current with high DC bus utilisation ratio. The feasibility and effectiveness of the suggested SVM scheme is verified through both numerical tests and FPGA-based real time implementation.
  Keywords: PV pumping system; 3L-NPC inverter; SVM; CMV; leakage current; FPGA board.
  DOI: 10.1504/IJPELEC.2025.10067953
   
  
• Detection and classification of faults in DC microgrids utilising artificial neural network with bidirectional gated recurrent units  
  by Ramaprasanna Dalai, Sarat Chandra Swain 
  Abstract: This paper proposes a fault detection and classification method for DC-MG. This paper aims to identify and categorise errors with increased precision. In order to improve the detection accuracy, a hybrid artificial neural network (ANN) and bidirectional gated recurrent unit (BiGRU) is proposed. The input signals features (voltage and current) are extracted using the discrete wavelet transform (DWT). The hybrid ANN-BiGRU model analyses and classifies faults in the microgrid system using the features extracted using the DWT. The osprey optimisation algorithm (OOA) is used to adjust the weight parameters to minimise error. The simulation results were obtained using the MATLAB/Simulink tool. The simulation results indicated that the proposed technique acquired a higher accuracy of 99.65%, precision of 99.60%, and recall of 98.5% compared to other state-of-the-art methods.
  Keywords: DC microgrid; DC-MG; osprey optimisation algorithm; OOA; artificial neural network bidirectional gated recurrent unit; ANN-BiGRU; discrete wavelet transform; DWT; renewable energy sources; RESs.
  DOI: 10.1504/IJPELEC.2025.10068210
   
  
• Flyback converter design with EMC improvement for railway applications  
  by Özkan Birinci, Nezihe Yildiran 
  Abstract: Nowadays, switched mode DC-DC power supplies are widely used in industry. The flyback converter is at the forefront of the railway application due to its wide input voltage range at low powers, input and output isolation, reliability, and simplicity of design. This paper aims to design a flyback converter with an EMC filter and dimmable feature for use in led lighting designs in railway systems with high efficiency and low cost according to the equivalents in the literature and industry using hard switching technique and passive RC snubber. The power losses of the flyback converter circuit were calculated theoretically, and all the theoretical relations were simulated in the LTspice program. Additionally, the EMC filter circuit was designed and implemented according to the desired flyback converter specifications. The prototype of the designed flyback converter was implemented with an input voltage range of 77-137.5 V_dc, a rated output voltage of 24 V_dc, an output voltage of 20 V_dc in dimming mode, and the output current of 1.5 A. Then, electrical, thermal performances as well as EMC tests were performed experimentally. The converter reaches approximately 90% efficiency at rated power. The designed flyback converter complies with EN 50155 and EN 50121 railway standards.
  Keywords: DC-DC converter; EMC filter; flyback converter; railway application.
  DOI: 10.1504/IJPELEC.2025.10068211
   
  
• An Alternate Topology for Multi Input DC/DC Converter with Performance Analysis  
  by Tuhinanshu Mishra, Ravindra Kumar Singh 
  Abstract: A single inductor dual-input single-output (DISO) DC-DC converter topology is presented in this paper. The proposed DISO topology utilises a 1-mH inductor and four switches. A 3-pulse novel PWM scheme and control strategy are introduced for efficient control. A PV source and a 36-V battery energy storage system are two sources. The 6-KW DC microgrid load consists of residential loads and electric vehicle charging station. With dropping solar irradiance, it is shown that the load demand is met by vehicle to grid transfer of power. Simulation against variation in solar irradiance from 0 W/m2 to 1,000 W/m2 in PV source is also done using MATLAB SIMULINK. The proposed converters performance under simulation in real time is done by using Novacor RTDS simulator along with its hardware prototype building. The converter together with the microgrid application is a rapidly emerging area of application of electronics in power system.
  Keywords: multi-input multi-output; MIMO; renewable energy; microgrid; solar energy; EV charging.
  DOI: 10.1504/IJPELEC.2025.10068271