State-owned Bharat Heavy Electricals Limited is executing 25 MW (AC) and 22 MW (AC) floating solar projects for NTPC at Simhadri (Andhra Pradesh) and Kayamkulam (Kerala), respectively. Bids are invited for supply and commissioning support of 3-phase grid-connected outdoor/containerised power conditioning units (PCUs) rated 1500V, 2.5 MW for these projects.
The vendor is required to provide comprehensive warranty for 60 months from date of commissioning or 63 months from date of supply, whichever is earlier.
To be eligible, the bidder should be an original equipment manufacturer and should have supplied and commissioned cumulative capacity of minimum 40 MW with the tendered PCU type for solar power plants.
Technical criteria
The PCUs must have unit power factor at ambient temperature of 50 degrees Celsius and 0.95 power factor at 45 degrees Celsius.
Further, in order to maximize the energy collection from solar array, the PCU shall have inbuilt maximum power point tracker (MPPT) controller and the MPPT shall be able to operate the PV array at its maximum power point by adjusting the output voltage of PV array system according to atmospheric condition.
The solar power plant will have an integrated supervisory control and data acquisition (SCADA) system, which is within BHEL scope, whereby all the PCUs will be integrated with other data systems such as solar array string monitoring, weather monitoring, HT side transformers/breakers monitoring, etc. Accordingly, the PCU shall have necessary communication protocol and output ports to facilitate SCADA interface.
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