Investigation on the transient stability of hydro generator working with power grid

Abstract

Abstract Huge hydro-generator is the inevitable development trend of hydro-generator for utilization of water resources. It is very necessary to research the technical issues for 1000MW hydro-generator. Whether the short-circuit faults locate at the generator terminal or the end of transmission line, the transient stability of hydro-generator is calculated and analyzed based on the field-circuit coupling model. Short-circuit fault must be cleared immediately in order that the power system and generator can maintain stable operation, in this paper, fault clearing time limit under different conditions is obtained by mass of simulation. The results obtained in this paper can provide valuable reference for the actual operation of 1000MW hydro-generator, and it is also useful and valuable for the design of protection devices, the dispatching of power grid and the debugging of generator when be connected to power grid.