ANALISIS DAN PERKIRAAN UMUR ISOLASI BELITAN STATOR GENERATOR DENGAN PENGUJIAN NON – DESTRUKTIF ELEKTRIK PADA GT 3.2 INDONESIA POWER PRIOK POMU
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Institusion
Institut Teknologi Perusahaan Listrik Negara
Author
NOVRINYALDI, ILHAM
Junaidi, Andi
Junaidi, Andi
Subject
Teknik Elektro
Datestamp
2022-11-07 04:27:12
Abstract :
In the electric power system, the generator is an important component because it is the center of power generation. If the generator breakdown or failure occurs it will stop the process of distributing electrical energy and will make a big loss to the system. In generator failure, the main cause that often occurs in the field is the failure of the stator winding insulation compared to other causes. The generator is in operation, the generator stator winding experiences various pressures from electrical, thermal and mechanical pressures which can cause excessive stress on the generator stator. The non-destructive test is an inspection carried out on the generator during maintenance and calculates the estimated life of the winding insulation from the results of the inspection carried out using the D - map method. The results of the Non-destructive test carried out isolation of each phase showed the insulation was still in good condition, dry, no contamination, none, voids and partial yielding. The results of the tan delta test, partial discharge and leakage current as a parameter for calculating the estimated life of the winding insulation in the D - map method. The residual breakdown voltage obtained from the D - map calculation is 91,23%, this value is above the minimum standard of 40% according to MELCO's Stator Insulation Requirements. From the Dmap graph, it is obtained that the estimated life of the generator stator winding insulation is 26 years, assuming the generator operates normally and there is no disturbance to the generator.
In the electric power system, the generator is an important component because it is the center of power generation. If the generator breakdown or failure occurs it will stop the process of distributing electrical energy and will make a big loss to the system. In generator failure, the main cause that often occurs in the field is the failure of the stator winding insulation compared to other causes. The generator is in operation, the generator stator winding experiences various pressures from electrical, thermal and mechanical pressures which can cause excessive stress on the generator stator. The non-destructive test is an inspection carried out on the generator during maintenance and calculates the estimated life of the winding insulation from the results of the inspection carried out using the D - map method. The results of the Non-destructive test carried out isolation of each phase showed the insulation was still in good condition, dry, no contamination, none, voids and partial yielding. The results of the tan delta test, partial discharge and leakage current as a parameter for calculating the estimated life of the winding insulation in the D - map method. The residual breakdown voltage obtained from the D - map calculation is 91,23%, this value is above the minimum standard of 40% according to MELCO's Stator Insulation Requirements. From the Dmap graph, it is obtained that the estimated life of the generator stator winding insulation is 26 years, assuming the generator operates normally and there is no disturbance to the generator.
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