This report provides a detailed analysis of a 230 MVA hydrogenerator, focusing on its design, characteristics, and performance. The report begins with the basic design calculations, including technical data such as rated capacity, voltage, power factor, and speed. It then delves into the stator winding design, specifically the double-layered wave winding configuration, and provides a winding table. The core of the report presents the results of magnetic circuit calculations under no-load conditions, including magneto-motive force, flux density, and current values. These results are presented in tables and graphs, including magnetization characteristics. A vector diagram for normal load is also included. The report compares the theoretical design results with the Yeywa hydrogenerator data, highlighting differences in dimensions, temperature, and efficiency. The theoretical design results in an efficiency of 98.37%, while the Yeywa data indicates a lower efficiency of 95.02%, emphasizing the importance of the theoretical design's dimensions for optimal performance. The analysis includes detailed calculations and comparisons, making it a valuable resource for understanding hydrogenerator design and performance.