Electrical Engineering

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“DESIGN AND FABRICATION OF SOLID-STATE ON-LOAD TAP CHANGER”
(I.O.E. Pulchowk Campus, 2023-04) Neupane, Kismat; Niraula, Kshitij; Chaudary, Mahesh; Ray, Nikesh
In the recent time, the continuous, uninterrupted and fast power supply along with high efficiency is one of the major concerns in the field of power system. It is necessary that our system should react quick to increase and decrease in heavy as well as light load. The on-load tap changers have become one of the important parts of transformer in order to regulate the constant output voltage without disconnecting the load. The purpose of this project is to design the most convenient type of tap-changing system that omits all the disadvantage of the present type of tap changing. It focuses on how current tap changing system is working, what are the problems associated with it and hence how can we replace them by using modern tools, devices, systems and methods. Earlier mechanical type on-load tap changers were in use which had major shortcomings like arcing, slow response time, high maintenance and service costs. And these get even worse in the case distribution transformers which are manually operated that too after disconnection of load and hence do not provide dynamic control over output voltage and require constant human intervention. Due to these flaws of the mechanical type, solid-state (electronic) tap changers were introduced.