Analisis Indikasi Kegagalan Transformator dengan Metode Dissolved Gas Analysis
ABSTRACT: A common problem in
power transformers is the emergence of operational failures, both the failure
of both thermal and electrical failures. Failure of the thermal and electrical
failures generally produce harmful gases commonly known as the fault gas. Most
power transformers typically use oil as an insulator that functions in addition
to cooling also to dissolve the harmful gases in order not to circulate freely.
The type and amount of dissolved gas concentrations in oil may provide
information to the indication of failures in the transformer. Methods for
identifying and analyzing the gases dissolved in oil is called as a method of
DGA (Dissolved Gas Analysis). The final project is about the analysis of DGA
test to identify indications of failures in the transformer. Analytical methods
are used 4 methods that is TDCG (Total Dissolved Combustible Gas), Gas Key,
Roger Ratio and Duval Triangle. IEEE Standards std.C57 - 104.1991 and IEC 60
599 is used as a benchmark analysis of test results of DGA. Analysis of DGA
results test that have been made to the IBT
transformer 1 Phase R Ungaran Substation in 2005 and 2006, with TDCG
method shows the transformer in condition 2, the key gas method shows have been
an indication of thermal failure involving insulator paper as indicated by the
concentration of CO gas whose value is 53% of the value of the total fault gas.
Analysis by Roger's method and the Duval method indicated that there has been a
thermal failure with a temperature between 1500C - 3000C and 3000C - 7000C.
From the analysis of DGA results test in 2007 to 2011 shows the transformer in
normal circumstances this is indicated by the value TDCG under 720 ppm.
Penulis: MUHAMMAD FAISHAL AR,
KARNOTO KARNOTO, TEJO SUKMADI
Kode Jurnal: jptlisetrodd110131
