Detailed Engineering and Environmental Study of Kimathanka Arun-Arun Hub 400 kV Double Circuit Transmission Line Project

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Detailed Engineering and Environmental Study of Kimathanka Arun-Arun Hub 400 kV Double Circuit Transmission Line Project

  • Project Date:01 December 2018
  • Our Team:
  • Client:
  • Categories:Substation/ Transmission Line
Description

Project Summary

Rastriya Prasaran Grid Company Limited (RPGCL) awarded the contract to NEA Engineering Company for ‘Detailed Engineering and Environmental Study of Kimathanka Arun-Arun Hub 400 kV Double Circuit Transmission Line Project’. The objective of this study is to produce a design report, technical specification and project schedule in sufficient detail to float the tender for construction of the 400kV double circuit transmission line from Kimathanka Arun substation at Haitaar to Arun Hub substation at Shitalpati.

This Kimathanka Arun-Arun Hub 400 kV Transmission Line is about 40 km long that connects two major substations Kimathanka Arun S/S (Haitaar) and Arun Hub S/S (Shitalpati) in the Arun River Basin and will evacuate more than 2000 MW into the national Grid. This project lies entirely in Sankhuwasabha district in Province 1, Nepal.

Salient Features

  1.  

Project Location

Sankhuwasabha District, Province-1, Nepal
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Connecting Substations

  1. Kimathanka Arun S/S
  2. Arun Hub S/S

 

Haitar:      27°37’42’’ N           87°21’23’’ E

Sitalpati:   27°24’10’’ N           87°08’00’’ E
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Line Length

40 km approx.
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Transmission Voltage

400 kV
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Conductor

Quad Moose ACSR
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Circuit Arrangement

Vertical
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Support structure

Self-supporting Lattice Steel Tower
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Number of Circuit

2
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Transmission Capacity

2511 MVA

Brief Description of Major Task

SN

Task

Description
  1.  

Detail Survey and Design of Transmission Line
  • Optimal transmission line route fixation and detail RoW Survey.
  • Prepare sag templates, Right-of-Way Plan and estimate Bill of Quantities (BoQ).
  • Profiling and tower spotting with demarcation of tower spot using PLS-CADD.
  • Develop the construction and installation plan and Project Work-Schedule.
  1.  

Detail Engineering and Design of Substations
  • Identify the suitable substation location, type (AIS or GIS) and their layout.
  • Perform detail engineering and design of the substation components.
  • Single line diagrams, protection and control schematic diagrams, interlocking schemes, substation layouts.
  • SCADA, substation automation and communication system.
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Environmental Study and Social Safeguard Plans
  • Prepare and conduct environment study i.e. EIA or IEE.
  • Prepare tree (forest) clearance and cutting plan for the ROW and substations.
  • Identify social impact of the project and suggest the social safeguards plan.
  • Demarcation of land for RoW and S/S with identification of land type.
  • Prepare report for land acquisition process with land partial details of RoW and substation.
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Soil Investigation and Geo-technical analysis
  • Soil exploration including soil resistivity measurement at each substation and Major Tower locations.
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Tower Design
  • Design of major standard tower types to be used in 400 kV quad moose double-circuit transmission line.
  1.  

Final Design Report
  • Preparation of detail cost estimate,  Detail Design/Study Report and Bidding Document, Project Schedule.