Stator Short-Circuit Fault Modeling Method of Turbine Synchronous Generator Considering Winding Potential Phase Distribution

Abstract

From the perspective of engineering practice, this paper proposes a modeling method for multi-branch turbine synchronous generator stator short-circuit fault considering the distribution characteristics of the winding potential phase. The proposed method can realize the simulation calculation of various internal short-circuit faults of large synchronous generators only by using the common parameters of generators. On the basis of fully considering the characteristics of stator winding connection, the stator winding potential splitting method and the calculation method of winding self-mutual inductance parameters of each part after splitting are proposed. Aiming at the normal operation state of the generator, the same branch short-circuit fault, the inter-branch short-circuit fault and the inter-phase short-circuit fault, the mathematical calculation models are constructed respectively. Finally, the rationality and correctness of the proposed mathematical modeling method are verified by simulation and experimental analysis.