Design, Simulation, an‎d Construction of a Three-Level Diode-Clamped (NPC) Inverter for Electric Train Traction Systems

3/11/2026 12:00:00 AM

In this thesis, the design, simulation, an‎d implementation of multi-source inverters based on the three-level diode-clamped (NPC) topology for multi-mode electric traction systems in DC trains are investigated. The NPC structure, due to its advantages such as reduced voltage stress across switches, lower switching losses, an‎d improved output waveform quality, is considered a suitable option for high-power applications in railway transportation systems. This research aims to enhance the dynamic performance an‎d increase the energy efficiency of electric traction systems. Initially, the configuration an‎d characteristics of the NPC topology are analyzed, followed by the development of a multi-source control strategy to manage various input sources an‎d changing operating conditions. Simulations conducted in the MATLAB/Simulink environment demonstrate the optimal performance of the inverter under variable load conditions an‎d input voltage fluctuations. Furthermore, the hardware implementation of the designed system verifies its operational accuracy an‎d reliability in real-world applications. The results indicate that the use of multi-source NPC inverters can lead to reduced energy losses, improved system stability, an‎d increased flexibility in electric traction systems for railway applications.

اينورتر چندمنبعي , ساختار كلمپ ديودي سه‌سطحي , رانش الكتريكي قطار , كاهش تلفات انرژي , بهبود پايداري سيستم , كنترل چندمنبعي

Multi-source Inverter , Three-Level Diode-Clamped Topology , Electric Traction Systems , Energy Loss Reduction , System Stability Improvement , Multi-source Control

Javad Abedinzadeh

Dr. Seyed Saeed Fazel