The industry is expecting the government to invite bids for power transmission infrastructure projects worth Rs 1.50 lakh crore in the next 18 months, Sterlite Power Transmission said on Thursday. In December, the government had launched a plan with investment opportunities of about Rs 2.44 lakh crore for building a transmission system for evacuating 500 gigawatts (GW) of non-fossil based energy by 2030.