BANGKOK (AFX-ASIA) – Electricity Generating Plc said one of its joint ventures, Gulf Electric Plc, signed an agreement on Sept 27 with Tractebel SA in for the purchase of 100 pct stakes in Nong Khae Cogeneration Co Ltd (NKCC) and Samutprakarn Cogeneration Co Ltd for US$94.3 million. Electricity Generating holds a 50% stake in Gulf…