Parameter Sensitivity of High-Order Equivalent Circuit Models Of Turbine Generator

Abstract

THIS WORK SHOWS THE RESULTS OF A PARAMETRIC SENSITIVITY ANALYSIS APPLIED TO A STATE-SPACE REPRESENTATION OF HIGH-ORDER TWO-AXIS EQUIVALENT CIRCUITS (ECS) OF A TURBO GENERATOR (150 MVA, 120MW, 13.8 KV Y 50 HZ). THE MAIN PURPOSE OF THIS STUDY IS TO EVALUATE EACH PARAMETER IMPACT ON THE TRANSIENT RESPONSE OF THE ANALYZED TWO-AXIS MODELS D-AXIS ECS WITH ONE TO FIVE DAMPER BRANCHES AND Q-AXIS ECS FROM ONE TO FOUR DAMPER BRANCHES. THE PARAMETRIC SENSITIVITY CONCEPT IS FORMULATED IN A GENERAL CONTEXT AND THE SENSIBILITY FUNCTION IS ESTABLISHED FROM THE GENERATOR RESPONSE TO A SHORT CIRCUIT CONDITION. RESULTS PONDER THE IMPORTANCE PLAYED BY EACH PARAMETER IN THE MODEL BEHAVIOR. THE ALGORITHMS WERE DESIGN WITHINMATLAB® ENVIRONMENT. THE STUDY GIVES WAY TO CONCLUSIONS ON ELECTROMAGNETIC ASPECTS OF SOLID ROTOR SYNCHRONOUS GENERATORS THAT HAVE NOT BEEN PREVIOUSLY STUDIED. THE METHODOLOGY PRESENTED HERE CAN BE APPLIED TO ANY OTHER PHYSICAL SYSTEM.