International Transactions on Electrical Energy Systems

Research Article

Preprocessing Approach for Power Transformer Maintenance Data Mining Based on k-Nearest Neighbor Completion and Principal Component Analysis

Table 1

RIO Tinto Alcan of Canada database of dissolved gases from transformer T0001.
DateH2CH4C2H2C2H4C2H6COCO2O2N2
25/01/198585,0040,000,0055,0052,001290,0011500,006380,0072600,00
23/10/198689,0041,000,0044,0048,001403,0015092,008203,0078927,00
15/12/198690,0035,000,0037,0048,001310,0012000,0010600,0079600,00
08/06/198780,0040,000,0046,0047,001160,0010400,0013700,0082500,00
06/09/198880,0030,002,0034,0042,001200,0010600,008710,0070500,00
17/05/198985,0040,002,0039,0050,001190,0010800,003800,0068500,00
17/10/198990,0040,002,0036,0048,001210,0011200,007130,0064200,00
30/07/199080,0030,002,0031,0039,001080,009680,009360,0073800,00
16/04/199190,0030,002,0022,0044,001150,0010400,007580,0065300,00
20/04/199285,0037,000,0032,0046,001262,0011344,001092,0067199,00
14/08/199294,0057,000,0034,0049,001391,0011694,003422,0097388,00
02/11/199286,0033,000,0034,0045,001317,0011218,001331,0063320,00
29/04/199373,0029,000,3030,0043,001172,0010802,001574,0058747,00
02/08/199372,0033,000,0029,0040,001158,0010906,004266,0062380,00
22/12/199374,0035,000,0027,0044,001278,0010899,003140,0074873,00
01/05/199534,005,300,002,702,70242,001181,0019996,0064920,00
10/05/199534,005,300,002,702,70242,001181,0019996,0064920,00
29/10/1997107,0024,000,0019,0014,001153,005626,00454,0066308,00
31/05/1999101,0026,000,3023,0016,001192,005870,004709,0065210,00
10/05/200089,0026,000,0023,0018,001177,006476,002595,0077360,00
10/05/200089,0026,000,0023,0018,001177,006476,002595,0077360,00
15/05/2001132,0044,000,0039,0033,001929,0012520,005494,00105155,00
13/11/200194,0030,000,0030,0022,001349,007976,00875,0064907,00
06/05/200270,0025,000,0026,0019,001171,007416,003512,0063358,00
14/10/200373,0028,000,0032,0021,001167,006446,00575,0060260,00
13/05/200458,0023,000,0026,0020,00978,006999,00403,0059725,00
14/05/200566,0025,001,1029,0021,001220,008354,001067,0064411,00
10/05/200669,0026,000,0033,0023,001186,008099,002561,0067380,00
17/05/200768,0025,000,0035,0024,001211,009018,006181,0064829,00
22/05/200869,0024,000,0038,0023,001184,008205,002816,0064983,00
17/06/200984,0029,000,0044,0029,001293,0010276,009234,0077994,00