Power companies in Singapore’s secretive Temasek Holdings stable reported strong profits in FY 2003, reversing losses in the previous year.   In its first annual report since its 1974 creation, Temasek said Tuas Power earned S$82 million, Senoko Power S$120 million and Power Seraya $88 million. (US$1=S$1.7), In FY2002, they reported losses of S$391 million,…