چكيده به لاتين
This thesis investigates the design and simulation of a medium-voltage hybrid breaker for the protection of electrical supply networks in rail transportation systems. It addresses the growing need for reliable and efficient protection systems in high and medium-voltage networks. With recent advancements in semiconductor technologies and power electronic systems, innovative methods have emerged to enhance efficiency, reduce downtime, and minimize energy losses. The study explores the design and performance of a hybrid breaker in both AC and DC supply networks, utilizing simulation software such as LTspice and PSpice for analysis. The results demonstrate that these designs offer improved protection against circuit faults and enhance breaker performance during outages. In electrical systems operating across various voltage and power levels, protection is a critical factor for system survival, safe operation, and optimal performance. Traditionally, protection is achieved through the use of circuit breakers (CBs). While conventional electromechanical circuit breakers, such as fuses, have been effective and reliable, emerging power distribution technologies, such as DC microgrids and DC transmission lines, demand faster switching capabilities. This need has driven research into solid-state circuit breakers (SSCBs), particularly hybrid circuit breakers (HCBs). These systems are increasingly utilized in low-voltage applications (48 to 1500 V), medium-voltage ranges (5 to 33 kV), and even high-voltage networks up to 500 kV. Key areas of application include distribution systems for naval vessels, battery protection, photovoltaic systems, defense power systems, railway power systems, and HVDC transmission lines.This research provides valuable insights into the potential of hybrid breakers to enhance protection and performance in modern electrical supply networks.
