As per CERC Tariff Regulations of 2014, a generating unit after its commissioning, has to successfully undergo Trial Run Test at Maximum Continuous Rating (MCR) or Installed Capacity (IC) for 72 hours continuously for declaration of COD for billing to beneficiaries. Prior to commercial operation, the energy injected by the generator has to be billed at infirm power rate and only after declaration of successful CoD by the generator, it can bill the discoms for the scheduled power at electricity tariff.
Gridco accused NTPC of illegally declaring COD of Unit-IV of Stage of its Barh station in Bihar. CERC in its order in September 2017 backed Gridco's case. “Power injected by Respondent No 1 (NTPC) in respect of the unit before March 8, 2016 shall be treated as infirm power even though power was scheduled by the beneficiaries during the period. The revenue earned over and above fuel cost from sale of infirm power from November 15, 2014 to March 7, 2016 shall be adjusted in the capital cost”, the CERC order stated.