Chandigarh, March 12 -- Punjab Vigilance Bureau (VB), tasked with probing the alleged inflated power purchase agreements (PPAs), has started the physical assessment of constructions and equipment at the private thermal plants which contribute to fixed costs. As per VB officials, privy to the probe, the bureau teams have already visited a private thermal plant to check the claims made by it to justify fixed costs that were approved by the power regulator....