Hierarchical architecture is adopted to meet the requirements of users on control performance, graphical interface, communication and other aspects of excitation products.@#AVR is the core of excitation control system, and its performance and reliability directly affect the safe and stable operation of the whole system.@#The full-wave Fourier transform AC sampling technology can effectively filter out the constant DC component and the whole harmonic component, and significantly improve the calculation accuracy.@#The new TBC enhances the overall protection of the rectifier cabinet and makes the rectifier cabinet intelligent to improve the reliability of the excitation control system.@#It adopts optical fiber communication between control layer and executive layer devices to ensure the integrity of communication transmission and the real-time performance of excitation control.@#It adopts optical fiber isolation pulse trigger technology.@#