ANNUAL PLAN 2002-03
Power Department

DEMAND NO. 32

As against the projection of Rs 6500 lakhs proposed for the AP 2002-03 under Power sector, there has been an award of Rs 4170 lakhs including the schemes pertaining to EAP, APDRP and PMGY. In the absence of budgetary provision under T&D Schemes, Miscellaneous Distribution Schemes, R.E. Schemes and Survey and Investigation, the Department has been facing difficulty in completing the continuing projects and setting the bills against the spilled over works of the Ninth Five Year Plan. The following activities are proposed with this outlay during the AP 2002-03.

PROJECTS SPILLED OVER FROM THE NINTH FIVE YEAR PLAN

A. GENERATION

I. Continuing Schemes (Spilled Over from the Ninth Plan):

Apart from Rabomchu HEP (3MW), which is in the verge of completion, there are two sanctioned generation schemes spilled over from the Ninth Plan. Works on these projects are under progress and have been considered for speedy implementation iwht the capital subsidy support of MNES. They are:

1. Lachungchu Stage-II (2x1.5 MW): The power house is located close to the boarder of China, where Indian army activities are quite prominent. More defense establishments in the locality are being added over the years requiring review of the demand profile. The entire belt is having high potential for tourism and the State Government has given priority for developing infrastructure. Lachung-II has a potential to generate 3 MW seasonal and 1.90 MW firm. This power house can be run in isolation to cater power requirement of the entire belt including defense establishment. This is a run-of-the-river project towards down stream of the existing Lachung Micro-hydel. A sum of Rs 241 lacs has already been spent till 31/3/2002. An outlay of Rs 105 lakhs under SP and provision of Rs 300 lakhs has been made under CSS for the AP 2002-03. The project is scheduled to be completed by the end of 2004-05.

2. Mangley Hydel Project (2x500 KW): Development of hydro-power projects in the Rangpochu had been under investigation for the last 8 years. This stream is one of the tributaries of the river Teesta and itself has the tributaries like Gyagyong and Nimang khola. The river originates at Rabong-Dozong area in the South district and flows towards South-East direction amidst dense mixed forest in the upper catchment and meets the river Teesta near Mangalbarey.

The scheme envisages diversion of water from Rangpochu at an elevation of 572 meters and utilizes a gross head of 142 meters to generate 1 MW seasonal and 500 KW firm with a designed discharge of 1 cumecs. The detailed survey of this projects was taken up during the year 1995 and subsequently various locations for the proposed structures were fixed. Due care has been taken to avoid dense forest land in order to keep the ecology of the region intact. The Project is loated at Namphok village.

The Power house building will be located at the left bank of Rangpochu and will house 2 numbers Horizontal Francis Turbines coupled to the Generating units with all the required accessories. The discharge from the tail race will be diverted back into the same river down stream free from any pollution. The scheme does not involve any displacement of habitat nor submergence of land and property. The project is proposed to be completed within a period of 3 to 4 years time to contain within the year to year fiscal outlays. However, the completion period can be advanced if adequate funds are made available during the plan periods. A sum of Rs 257.20 lacs has already been spent till 31/3/2002 for acquiring lands and infrastructure development and major works. An outlay of Rs 25 lakhs under SP and Rs 200 lakhs under CSS have been made for the AP 2002-03.

Over and above, an outlay of Rs 230 lakhs under SP and Rs 176 lakhs under CSS have been provided for settlement of liabilities for Rabomchu HEP together with a nominal provision of Rs 15 lakhs for DPH at Gangtok.

II. Renovation & Modernisation Scheme:

a) Renovation and Modernisation Lower Lagyap HEP (2x6 MW)

Date of Approval of the Project 12/4/1999 Approved Cost Rs 1951.00 lakhs CSS component Rs 1951.00 lakhs Actual Exp. Incurred Rs 1521.00 lakhs As on date. Status Advance stage of completion   Due for completion by Nov. 2002.. Objective/Benefit New lease of life to the major portion of civil structures, hydro-mechanical and Electromechanical equipments. Retrieval of its name plate capacity of 12 MW.

(b) Upper Rongnichu HEP. (4x2 MW)

The URHP has an inherent problem in generating its name plate capacity due inadequate capacity of its water conductor system to carry water for running more than 2 TG sets. Thereby, confining the generation to half of its installed capacity. The Department, with the help of expert in the field, has devised some moderate modification in the water conductor system to gain utilization of its capacity. The project has been posed to the MNES for consideration under capital subsidy scheme. The present capacity will be enhanced to its double and the benefit will be more than four fold due to its access to the regional grid.

Cost Estimate Rs 1038.00 lakhs (i/c CSS Rs 0727.00 Lakhs) Status Proposal pending with MNES

 

Benefit Seasonal Firm MU Generated (@60% LF) Now 04.00 MW 2.00 MW 07.20 MU After Implementation 08.00 MW 4.00 MW 31.54 MU Capacity Retrieval 04.00 MW 2.00 MW 24.34 MU

No fund is provided for this scheme.

(c) Rimbi cascade and Kalez:

Presently, these power stations are running in isolated mode supplying power radially to the specific towns and villages at a poor Plant Load Factor (PLF). If these three generating stations could be synchronized in to a single grid and futher hook it to the existing 66 KV system at Gyalshing, their PLF will improve significantly raising the annual generation from 3.06 MU to 14.72 MU. Detailed Project Report (DPR) having total cost estimate of Rs 700 lakhs has been prepared and the same has been submitted to MNES for providing capital subsidy. Accordingly the projection of fund requirement has been made in the Tenth Five Year Plan.

Cost Estimate Rs 497.00 lakhs (i/c CSS Rs 348.00 Lakhs) Status Proposal pending with MNES

 

Benefit Seasonal Firm MU Generated Now 01.70 MW 1.70 MW 03.06 MU After Implementation 03.60 MW 2.00 MW 14.72 MU Capacity Retrieval 01.90 MW 0.30 MW 11.66 MU

No fund is provided for this scheme.

B. TRANSMISSION SCHEMES

Under Transmission and distribution scheme, there are four schemes, which are in the advance stage, rest of the schemes are being carried over since the eighth five year plan but could not be taken up on full scale due to inadequate provisions.

(i) Diversion work on 66 KV Transmission at Kateng, Kamlet and Gelling

Cost Estimate Rs 128.00 lakhs Spill Over to Xth Plan Rs 078.00 lakhs

No provision is available for this work during the AP 2002-03 resulting in incomplete work.

(ii) 66 KV lines associated with Namchi College (Kamrang)

Cost Estimate Rs 140.00 lakhs Spill Over to Xth Plan Rs 075.00 lakhs

No provision is available for this work during the AP 2002-03 resulting in incomplete work.

(iii) Construction of one 66 KV line from Melli to Mamring i/c one 66/11 KV, 1x7.5 MVA Substation each at Mamring (South Sikkim) and Setipul (East Sikkim) for providing power infrastructure to Power intensive units.

The works on these schemes have been completed but due to non-availability of adequate funds. The Deparmtent is not in a position to pay the contractors and take over the works. A provision of Rs 325 lakhs would be required to liquidate the liability. Only a provision of Rs 25 lakhs is available for expenditure during the AP 2002-03.

(iv) Installation of Transformer & Power supply to Central Referral Hospital (CSR) at 5^th Mile, Tadong, East Sikkim.

Date of Approval of the Project by the State 30/11/1996 Approved Cost Rs 159.21 lakhs CSS component Rs 50.00 lakhs (NLCPR) Actual Exp. Incurred Rs 149.28 lakhs As on date. Status Project stands completed Objective/Benefit Accomplished 3 MW dedicated power supply to CSR

(v) Power Supply to VIP Complex at Gangtok

Date of Approval of the Project by the State 2000-01 Approved Cost Rs 100.00 lakhs CSS component Rs 50.00 lakhs (NLCPR) Actual Exp. Incurred Rs 100.00 lakhs As on date Status Project stands completed Objective/Benefit Accomplished dedicated power supply to VIP complex.

(vi) Construction of 66/11 KV, 2x2.5 MVA substation at Mangan and Soreng-Sombaria:

Mangan is the North district Head Quarter, which developing very fast. Presently, Mangan and the adjoining areas are getting power supply through the weak 11 KV distribution line. This work was scheduled for construction during the 8^th plan period itself but due to inadequate outlays in the past plan periods the work could not be taken up No provision available for the AP 2002-03.

(vii) Construction of 66 KV line from Soreng to Sombaria Including one extension bay at Soreng and one 66/11 KV, 2x2.5 MVA Substation at Sombaria: This is a new load center in the west district and is developing very fast. Some agro-industries are also coming up in this area, as such extension of this transmission line will motivate more local entrepreneurs to come forward thereby achieving socio-economical upliftment of the general people. Besides, the cascade development of Ramam hydroelectric powr is close by which may facilitate the state to draw its share of powr radially as an alternative to the Regional grid. No provision is available for the AP 2002-03.

C. DISTRIBUTION SCHEMES:

(i) Renovation, strengthening, augmentation etc. of Transmission & distribution lines in the state. (Sanctioned for funding under State Plan)

Cost Estimate Rs 787.79 lakhs Spill Over to Xth Plan Rs 272.79 lakhs Provision available AP 2002-03 Rs 50.00 lakhs Supplementary required Rs 222.79 lakhs

 

Works stands completed but above liability has to be paid to the State Trading Corporation for Sikkim.

(ii) 100% Metering aimed at energy accounting: (CSS Scheme under APDP): The Ministry of Power has accorded sanction of Rs 1630 lakhs under Accelerated Power Development Programme. This scheme after completion will help energy accounting.

Cost Estimate Rs 1630.00 lakhs Spill Over to Xth Plan Rs 638.00 lakhs

(iii) Remodeling of distribution system in and around Gangtok: This scheme is posed to the PFC for funding under Accelerated Power Development Programme.

(iv) Miscellaneous Distribution Schemes: As against provision of Rs 515 lakhs required for committed works, which are either completed, under completion or already commenced, only a provision of Rs 95 lakhs is available for expenditure during the AP 2002-03. Cost estimate of Soreng and Rabongla Under-ground Distribution work is Rs 110.50 lakhs but fund ear-marked within the above provision is only Rs 20 lakhs. Like-wise there are various schemes carried out by the Department in the South, West, East and North Districts including the works carried out through the Panchayat Units for which adequate fund is required to complete the already committed works.

NEW SCHEMES BEING INITIATED DURING THE ANNUAL PLAN (2002-03)

A. GENERATION

DEVELOPMENT OF TEESTA-IV AND TEESTA-VI UNDER PRIVATE SECTOR

The Department issued global notice inviting proposals from the prospective parties to take up implementation of Teesta stage-IV and Teesta-VI on BOO basis during the beginning of 2001. The Department got the RFQ and RFP bid documents prepared through SPDC and issued to these interested parties for submission of their offers in a common format. The RFQ documents were opened on 10/12/2001 followed by opening of RFP documents on 4/1/2002. Out of seven developers who had shown keen interest to develop these projects, only three parties have submitted their offers. Bid evaluation of these offers were carried out by WAPCOS and based on the most competitive proposal, the Department has awarded these two projects to Karnataka Power Corporation Ltd. And ATPIL consortium.

1. Development of small mini and micro-hydel schemes in the state with the Capital Subsidy scheme of MNES

The following mini and micro-hydel schemes have been considered for implementation in the Tenth Five Year Plan period.

CHHATTENCHU (2X1 MW): Chhattenchu is located in the village of Lachen in North District. It is proposed to harness the stream to generate 1 MW both seasonal and firm. The location is favourable having stable land profile in and around project construction sites. The project sites are accessible through all weather road being maintained by the B.R.O. Other positive feature of the project is that there is minimum construction for the approaches to the project sites. A provision of Rs 50 lakhs under SP and Rs 200 lakhs under CSS has been kept for the AP 2002-03.

RONGLICHU – I (2x2.5 MW): The project site is located in the East District very near to the border with Bhutan and it is well connected by the National Highway to Nathula bordering with Tibet (China) which is constructed and maintained by the B.R.O. This is a reasonably viable project with very good road communication network. It is a snow-fed stream with hardly any siltation problem and can have a firm and seasonal generating capacity of 5 MW. A provision of Rs 200 lakhs under SP and Rs 450 lakhs under CSS has been kept for the AP 2002-03.

RELLICHU (2x3 MW): Though situated in a remote area, the location of the project is ideal for development mini hydel project of 6 MW seasonal and 4 MW firm. A provision of Rs 200 lakhs under SP and Rs 500 lakhs under CSS has been kept for the AP 2002-03.

RINGYANGCHU (2x500 KW): It is located in the West District close to the border with West Bengal. The project will have an installed capacity of 1 MW seasonal and 0.5 MW firm. This is the only steam available in the locality. A provision of Rs 25 lakhs under SP and Rs 300 lakhs under CSS has been kept for the AP 2002-03.

2. Renovation & Modernisation Schemes:

(a) Jali Power House-Part-II: Besides, there are renovations schemes on two TG Units of Jali Power House, which was left unattended under MNES subsidy scheme due to cost limitation. A projection of Rs 150.00 lakhs has been made to retrieve their original plant capacity of 350 KW each. Once this gets completed, the Installed Capacity i.e., seasonal generation will be 2.5 MW instead of 1.4 MW. An outlay of Rs 100 lakhs has been provided under CSS for the AP 2002-03.

(b) Renovation of close conduit water conductor system of hydel stations in the state other than LLHP: Secondly, the Department proposes to replace close-conduit water conductor system of all the mini and micro hydel schemes in the state to give the entire structures a new lease of life. The scheme is ready for submission to the MNES for funding under Central subsidy scheme. (Total cost Rs 3200.00 lakhs) An outlay of Rs 140 lakhs has been provided under CSS for the AP 2002-03.

(c) Repair Works of Capital Nature: Occasional failure of civil structures and electrical installations due to flash floods, land slides, monsoon damages etc. can not be ruled out. This expenditure can not be met under Non-Plan provision and the restoration of the installations and other civil structures become important to restore power supply with a minimum time frame. Accordingly, the Planning Commission has been recommending some provision in every plan period to take care of such eventually. A provision of Rs 15 lakhs has been made for the AP 2002-03.

B. TRANSMISSION & DISTRIBUTION SCHEMES

The ‘Sikkim Human Development Report-2001’ paper 83 has further emphasized on extension of 132 KV line from the Eastern Region to the state for import and export of energy. These aspect of the works are being taken up as under:

1. Construction of 132 KV D/C line from Siliguri to Gangtok with LILO at Melli i/c 2x50 MVA Substation at Gangtok. Being implemented by PGCIL as a Regional Project.

2. Construction of 132 KV S/C line from Rangit to Melli with 2x50 MVA Substation at Melli. This project is under implemented with the Power Department under Non-Lapsable Central Pool of Resources.

Date of Approval of the Project Jan 2002 Approved Cost Rs 3979.00 lakhs CSS component Rs 3979.00 lakhs Actual Exp. Incurred Rs 500.00 lakhs As on date Status: Turn-key contract Transmission Lines: 30% completed Substation Placed order for equipments Target date of completion October 2003

Objective/Benefit Enable the State to draw its share of Central Sector power in the Region and WBSEB. This will help the state to supplement the peak shortfall of 40 MW together with up-coming industrial belt in the vicinity after its completion. Note: In view of the state’s ambitious plan to develop Melli-Manpur-Jorethang-Rothak-Legship belt in the South/West district as an industrial belt, the earlier proposed capacity of Melli 132/66 KV 2x20 MVA substation has been revised to 2x50 MVA, which has been approved by the planning commission on the technical suggestion

3. Communication and Data Exchange associated with Sikkim Load Despatch Centre

Date of Approval of the Project March 2002 Approved Cost Rs 849.00 lakhs CSS component Rs 849.00 lakhs Actual Exp. Incurred NIL Status Tender Specification Completed Due for completion December 2003 Objective/Benefit To facilitate communication and voice/data exchange through Replacement/revamping of redundant and unservisable PLCC equipments and providing RTUs at various generating stations, controls and load centers to facilitate minimize down time and improvement of PLF of state owned generating stations.

 

4. Construction of D/C 66 KV Transmission line from LLHP-Bulbuley to Sichey Substation including one 2x10 MVA 66/11 KV substation at Bulbuley

Date of Approval of the Project March 2002 Approved Cost Rs 1348.00 lakhs CSS component Rs 1348.00 lakhs Actual Exp. Incurred NIL Status Tender Specification Completed and Tender Floated. Awaiting Govt approval for award of contract. Due for completion March 2004 Objective/Benefit Presently, the state capital Gangtok is fed from two major over-loaded substation through an old transmission line handed over by the Government of India along with Lower Lagyap Hydel Project about 22 years back. If this transmission line fails, the state capital will have to suffer black out for indefinite period of time. In the absence of such alternative transmission system, the Department is not being able to guarantee quality and reliable power supply to the state capital, which being the haven for the tourist is also a place of great importance and prestige. Accordingly, this scheme will help an alternative outlet for Gangtok urban and suburban areas vis-à-vis to take care of the increased demand of this new locality.

C. Accelerated Power Development and Reform Programme: The Department has constituted a team to formulate schemes under sub-transmission and distribution with the help of its Advisor-cum-Consultant i.e. Power grid corporation of India Ltd. First phase of the work based on the priority fixed jointly by the state and the MOP is under preparation and is expected to be launched by the first week of November 2002. A provision of Rs 1800 lakhs is available for expenditure for the AP 2002-03.

D. RURAL ELECTRIFICATION SCHEME (PMGY)

The most important ara which contributes considerable T&D losses is due to the extensive uses of 11 KV transmission and distribution network while implementing Rural Electrification schemes. Besides, the use of 10 KVA single phase transformers by extending single phase lines based on the REC norms has led to all time complaints from the rural consumers because fo random failure of single phase transformers. These transformers proved inadequate once the people started taking service connections. Accordingly, these transformers are being replaced with three phase transformers of required capacities. Side by side, 11 KV lines and L.T. distribution lines are being strengthened. An outlay of Rs 400 lakhs is available for the AP 2002-03.

D. CONSTRUCTION OF BUILDINGS:

A number of residential and non-residential buildings are have been constructed and some are under construction for establishment of new subdivisional head quarters at Chungthang, Dentam, Soreng, Namchi, Sombaria, Rongli and Mayong, Side by side, some more building are added at Gangtok and the districts for providing accommodation to employees of the Department. A provision of Rs 30 lakhs is available for extension of office building at Gangtok.

E. SURVEY AND INVESTIGATION

On the basis of the available hydro-meteorological, geo-technical data and after the sites identified from the maps, the Power Departmtnet conducted studies on the enlisted tributaries which were found to be potentially viable ones. The main and sub-tributaries are listed as under:-

i) Tributaries of Rangit such as Rathangchu, Rimbi Khola, Ralli Khola, Ralli chu, Ramam/Rabong Khola, Kalez Khola, Rishi Khola and Manpur Khola.

ii) Rangpo Chu and its main tributaries Rangli Khola, and the sub-tributaries of Rangpo Chu and Rangit Khola.

iii) Dik Chu and its main tributaries like Bakcha Chu and Ratey Chu.

There are thirty-nine power schemes, which have good access. The schemes have been identified in view of their geotechnical soundness, which will present no difficulty during construction enabling earlier complietion. Also the creation of infrastructure facilities will not take very long time. Out of these schemes some have been implemented and some are in the process. A provision of Rs 5 lakhs is available for expenditure during the AP 2002-03.

F. DIRECTION & ADMINISTRATION

In order to meet the expenses on establishments and office expenses, the fund will be required as projected in the enclosed statement. An outlay of Rs 700 lakhs has been for expenditure during the AP 2002-03.

A nominal provision of Rs 50 lakhs has been made for strengthening of newly constituted Sikkim Power development Corporation Ltd.

Also a nominal provision of Rs 100 lakhs has been made for Purchase of power during the AP 2002-03.

G. EAP: The State Power sector has not availed any fund under EAP so far. However, a nominal provision of Rs 100 lakhs been projected for the AP 2002-03.

Table: Annual Plan, Abstract