Design of Three-Phase AC-Voltage Regulator Energy-Saving System by SOPC

Nios II is applied in three-phase AC-voltage regulator energy-saving system as the core microprocessor of FPGA system in this paper. A complete voltage regulating main topology circuit is designed. Only three groups of triggering signals are required to control the six thyristors’ conducting angles. A SOPC system is created by Qsys and Quartus II. The PID control algorithm is used to adjust the output voltage in real time according to the load change to save energy. The generation of high-precision triggering signals and PID control regulator functions are realized by Nios II, and simulated in MATLAB/Simulink. Experiments and in-field tests have shown the feasibility of the proposed scheme. The whole system’s analysis, synthesis, simulation and configuration are completed by Quartus II. Experiments show that the method is simple and reliable, and achieves a better energy-saving effect.