METHOD OF CONTROLLING AND DIAGNOSING TECHNICAL STATE OF TURBO-GENERATORS

摘要

FIELD: electrical engineering.;SUBSTANCE: invention relates to electrical engineering and the technology of operating turbo-generators, is meant for controlling thermal and technical state of turbo-generators, as well as cooling systems of turbo-generators, and can be used for diagnosing powerful turbo-generators with hybrid cooling. According to the proposed method, at the output of each stator slot temperature of the winding bar inside it is measured, as well as temperature of active steel of the stator, temperature of cold distillate at the input of the stator winding, temperature of cold gas at the output of the gas cooler, current and voltage of the stator and rotor. The square of the present value of stator current is determined, as well as the square of gross power of the turbo-generator, square of rotor current, power loss in the rotor winding and temperature of the rotor in corresponding load conditions. Present and reference temperature rise of the winding inside the stator slot are determined, as well as present and reference temperature rise of active steel, and present and reference temperature rise of the rotor winding for each present load condition. The ratio of the present temperature rise of the winding inside the stator slot to the reference temperature rise of the winding inside the stator slot is determined, as well as the ratio of the present temperature rise of active steel to the reference temperature rise of active steel, and the present temperature rise of the rotor to the reference temperature rise of the rotor, from the results of which presence of thermal defect is determined.;EFFECT: increased accuracy and effectiveness of controlling and diagnosing turbo-generators.;2 dwg, 3 tbl