Automatic Voltage Regulator Test of Three Gorges Right Bank Hydropower Station

Based on real-time digital simulations （RTDS）, a laboratory environment similar to the real-time operation situation of the Three Gorges Hydropower Station is established. Then, the causes for the power fluctuation of the second generator by errors in the rotor rotating speed calculation are found, and the tuning method of the speed related parameters are given. The damping and reverse tuning characteristics of power system stabilizers （PSSs） in the digital automatic voltage regulator （AVR） are compared and investigated in the frequency range of 0.18-1.1 Hz. The efficiency of the proposed tuning method for ensuring power system stability is verified by RTDS. Finally, field tests show the validity of the laboratory test results.