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A comprehensive scheme for strengthening of transmission and distribution system in NER & Sikkim was conceived as a consequence of Pasighat proclamation in 2007. A sub-group under the chairmanship of Member (PS), CEA was constituted by Ministry of DoNER to address the issue of transmission, sub-transmission, and distribution system in NER states and Sikkim. Based on the recommendation of the sub-group, Ministry of DoNER asked POWERGRID to prepare the detailed project reports for strengthening of transmission and distribution system for each state of NER and Sikkim as well as inter-state works in NER. POWERGRID submitted the DPRs to Ministry of Power in year 2010.

Subsequently, the intra-state scheme was taken up through grant/loan by Govt. of India/World Bank. The scope of works under inter-state works was taken up as Inter-State Strengthening scheme namely 'North Eastern Region Strengthening Scheme-II (NERSS-II).

Subsequently, the intra-state scheme was taken up through grant/loan by Govt. of India/World Bank. The scope of inter-state works was taken up as North Eastern Region Strengthening Scheme-II (NERSS-II).

The NERSS-II (Part-B) scheme already notified for implementation through TBCB route was reviewed in the 5th Standing Committee Meeting on Power System Planning of North Eastern Region and Ranganadi – Nirjuli 132kV D/c line was dropped. Further, Surajmaninagar - P.K.Bari 400kV D/c line (charged at 132kV) was revised in the meeting and proposed to be directly charged at 400kV along with new 400/132kV substations at Surajmaninagar & P.K.Bari and was decided to be implemented as NERSS-V.

The scheme includes Biswanath Chariyalli - Itanagar 132 kV D/c line (Zebra Conductor) which has been planned to strengthen the interconnection between the states of Assam and Arunachal Pradesh and also to provide an additional source of power to the capital city of Itanagar.

Implementation of Silchar - Misa 400kV D/c (Quad) line would provide a strong interconnection between northern and southern part of North Eastern Region and would also facilitate dispersal of power from central sector/private generation projects to various parts of NER through formation of Silchar -– Misa -– Balipara -– Bongaigaon -– Azara -– Byrnihat - Silchar 400kV ring network. Further, this line would provide an additional path beyond Silchar for evacuation of power from Pallatana GBPP.

The construction of Surajmaninagar - P.K.Bari 400 kV D/c line along with 400 kV operation of Palatana - Surajmaninagar and P.K.Bari - Silchar lines would provide alternate 400kV corridor viz. Palatana - Surajmaninagar - P.K.Bari - Silchar in order to improve reliability of power evacuation from Palatana generation project.

In addition, the AGTPP – P.K.Bari 132kV D/c line with high capacity HTLS conductor (equivalent to single moose) was planned for reliable evacuation of power from AGTPP generation project (4x21+2x25.5) after addition of 2 units of 25.5 MW capacity.

Project Elements

(i) Biswanath Chariyalli (POWERGRID) – Itanagar 132kV D/c (Zebra conductor) line

Line Bays:

Itanagar S/s (Arunachal Pradesh): 2 nos. 132kV line bays for termination of Biswanath Chariyalli (POWERGRID) – Itanagar 132kV D/c (Zebra conductor) line

(ii) Silchar (POWERGRID) – Misa (POWERGRID) 400kV D/c (Quad) line.

(iii) Establishment of 400/132 kV, 2x315 MVA S/s at Surajmaninagar

400 kV

• ICTs: 400/132 kV, 2x315 MVA

• ICTs bays: 2 no.

• Line bays: 4 no.

• 400 kV bus reactor bays: 2 no.

• Bus reactor: 2x125 MVAR

• Bus reactor bays: 2 no.

• Space for future bays: 6 no.

• Space for 400/132 kV, 315 MVA ICT along with associated bay

132 kV

• ICTs bays: 2 no.

• Line bays: 4 no.

• Space for future bays: 4 no

• Land for the Surajmaninagar 400/132kV S/s is identified and available with Tripura and the same would be provided to the TSP at cost.

(iv) Establishment of 400/132 kV, 2x315 MVA S/s at P.K. Bari

400 kV

• ICTs: 400/132 kV, 2x315 MVA

• ICTs bays: 2 no.

• Line bays: 4 no.

• Bus reactor: 2x125 MVAR

• Bus reactor bays: 2 no.

• Space for future bays: 6 no.

• Space for 400/132 kV, 315 MVA ICT along with associated bay

132 kV

• ICTs bays: 2 no.

• Line bays: 4 no.

• Space for future bays: 4 no.

(v) Surajmaninagar - P. K. Bari 400 kV D/c line.

(vi) 2 no. 400 kV line bays at Palatana GBPP switchyard for termination of Palatana - Surajmaninagar 400kV D/c line.

(vii) AGTPP (NEEPCO) – P.K. Bari (TSECL) 132 kV D/c line with high capacity HTLS conductor (equivalent to single moose ampacity at 85⁰C)

Line Bays:

AGTPP (NEEPCO) Switchyard: 2 no. 132 kV line bays for termination of AGTPP (NEEPCO) – P.K. Bari (TSECL) 132kV D/c line

P.K. Bari (TSECL) S/s: 2 no. 132 kV line bays for termination of AGTPP (NEEPCO) – P.K. Bari (TSECL) 132kV D/c line

Name of project specific SPV

NER II TRANSMISSION LIMITED

Name of the successful Bidder

M/s Sterlite Grid 4 Limited

Date of transfer of SPV to successful Bidder/Effective Date

31st March, 2017

Scheduled COD of the Project

December, 2020

Levelized Transmission tariff of successful Bidder

4316.53 million

Result

Result of financial bids

 

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