Generation Overview

TSECL has a total capacity of 110 MW from 3 generating stations viz. Gomuti Hydro-electric Project, Baramura Gas Thermal Power Station and Rokhia Gas Thermal Power Station. In addition to this, it has diesel based generating units of 5.85MW, which are also operational since pre-independence. The unit-wise capacity of all generating stations is mentioned below.

Table 1-1: Unit Wise Capacity of TSECL generation plants
Name of Project Unit Installed Capacity Year of Installation Phase
Gumti H.E Project Unit-I 5.00 MW 1976 Phase I
Unit-II 5.00 MW 1976
Unit-III 5.00 MW 1984 Phase II
Baramura Gas Thermal Project Unit-IV 21.00 MW 2002  
Unit-V 21.00 MW 2010  
Rokhia Gas Thermal Project Unit-III 8.00 MW 1995 Phase III
Unit-IV 8.00 MW 1995
Unit-V 8.00 MW 1997 Phase II
Unit-VI 8.00 MW 1997
Unit-VII 21.00 MW 2002  
Unit-VIII 21.00 MW 2006  
Unit-IX 21.00 MW 2013  
Installed (Hy+Th) Total 152.00 MW    

Hydel Power

There is a small Hydel power station in south Tripura named Gumti Hydel project having only 3 x 5 MW capacities. The yearly energy content in the reservoir of Gumti project is only 60 Million units. Normally 2 units of 5MW each run at a continuous load of 8 MW and the 3rd one is kept as stand by. It has been observed during last few years that with this arrangement 100% generation is achieved, i.e. 60 MU which fulfils the annual target. Theoretically the PLF is about 53 .33% with one unit as stand by. But there is hardly any water available at the end of the year and before next monsoon to increase the generation for achieving higher PLF.

Gas Thermal Project at Rokhia

The project has 4 nos. of Gas Turbine sets of 8 MW each and 3 nos. gas turbine sets of 21 MW each.

Unit – I has outlived its life. Further, unit II has been unstable since commissioning. The cost of reconditioning these units are found to be beyond economical viability. Therefore survey reports have been proposed for these units. 50% capacity share of Units V and VI of this project is to be given to neighbouring states Mizoram. Appropriate share of energy has to be transferred to these states at net generation cost.

The Diesel power house is operated intermittently, on emergency basis, mainly due to very high cost of fuel for the same.

Out of 152 MW installed capacity in the state comprising of Baramura-42 MW, Rokhia-95 MW and Gumti Hydel project-15 MW the over all generation is 110 MW round the clock as such the PLF works out at 72.37% for installed effective capacity the State.

2X21 MW Gas Thermal Project at Baramura

The first three units have been out lived their normal life due to prolonged use and further life extension seems uneconomical because of non-availability of spares from market and huge funds would be required for this purpose. Preparation for assessment of book value of the machine & other codal formalities to be observed is under consideration of TSECL.

2 units of 21 MW is in operation and average PLF is almost 95%. The Baramura project has been synchronized with NE Grid in the ABT regime. Being funded by NEC, this 2 units is considered as Inter-state station and hence 50% capacity share has to be given to neighbouring states of Manipur and Mizoram.

Calorific Value of Natural Gas

The rate of Gas consumption in a gas based Thermal plant depends upon the Heat Rate of the Turbine as well as Calorific value of the gas. At Rokhia Gas Thermal Power Station it is observed that Calorific value of Gas varies from month to month in the range of 8200 to 8300 Kcal/Cum. Union Ministry of Petroleum fixes the gas price considering Calorific Value of Gas at 10000 Kcal/Cum. Rebate/Premium on the gas price is applicable if the actual Calorific value of gas differs from the 10000 Kcal/Cum. GAIL indicates the average calorific value of gas for the particular month in their monthly gas bills to calculate the quantum of Rebate/Premium applicable.

Proposed Capacity Addition in Generation

  • Conversion of Rokhia open cycle to combined cycle with 30 MW capacity addition.