Feasibility Study for Transmission Line

for Transmission Line 230kVfrom Siem Reap to Phnom Penhvia Kampong Thom and Skun : 

for Transmission Line 230kVfrom Siem Reap to Phnom Penhvia Kampong Thom and Skun Feasibility Study 2007. 11

Contents : 

Contents KTC Cable / OX Engineering

Overall Location : 

Overall Location KTC Cable / OX Engineering

Project Outline : 

Project Outline Project Title Feasibility Study for Transmission Line 230kV from Siem Reap to Phnom Penh. Scope of Work Power transmission line of 230kV will be connected from west Phnom Penh substation to Siem Reap, and the line will be double circuit. 3 power substations will be installed to connect to the transmission line. Skun (Kampong Cham) substation Kampong Thom substation Siem Reap substation The substations will transform the voltage from 230kV to 22kV, and 230kV to 115kV according to the local purposes. KTC Cable / OX Engineering

T/L Route and Description : 

T/L Route and Description KTC Cable / OX Engineering We have studied the locations of 3 substations and transmission line routes (Option 1, 2, 3). After comparison, Option 3 was selected. Total towers : 755 ea T/L length : 300.8 km Interval between towers : 400 m Max distance : 774 m (no. 108~109) Tower height : 42 m

Topographic Survey for T/L Route : 

Topographic Survey for T/L Route The following points were considered to design the T/L (transmission line) route. ? To minimize the total length of T/L ? To facilitate accessibility for construction ? To avoid urbanized areas and temples ? To minimize collisions with houses and buildings ? To avoid soft ground areas such as wetlands ? To minimize crossings with main roads and railroads KTC Cable / OX Engineering

Topographic Survey for T/L Route – Index : 

Topographic Survey for T/L Route – Index KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 01 : 

Topographic Survey for T/L Route – Map 01 KTC Cable / OX Engineering West Phnom Penh Substation

Topographic Survey for T/L Route – Map 02 : 

Topographic Survey for T/L Route – Map 02 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 03 : 

Topographic Survey for T/L Route – Map 03 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 04 : 

Topographic Survey for T/L Route – Map 04 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 05 : 

Topographic Survey for T/L Route – Map 05 KTC Cable / OX Engineering Skun Substation

Topographic Survey for T/L Route – Map 06 : 

Topographic Survey for T/L Route – Map 06 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 07 : 

Topographic Survey for T/L Route – Map 07 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 08 : 

Topographic Survey for T/L Route – Map 08 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 09 : 

Topographic Survey for T/L Route – Map 09 KTC Cable / OX Engineering Kampong Thom Substation

Topographic Survey for T/L Route – Map 10 : 

Topographic Survey for T/L Route – Map 10 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 11 : 

Topographic Survey for T/L Route – Map 11 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 12 : 

Topographic Survey for T/L Route – Map 12 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 13 : 

Topographic Survey for T/L Route – Map 13 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 14 : 

Topographic Survey for T/L Route – Map 14 KTC Cable / OX Engineering

Topographic Survey for T/L Route – Map 15 : 

Topographic Survey for T/L Route – Map 15 KTC Cable / OX Engineering Siem Reap Substation

Load Demand Forecast : 

Load Demand Forecast KTC Cable / OX Engineering 1. Basis Load demand forecast has been made from 2011 to 2040 for 30 years. Load demand after 2025 is held constant. Electric-energy consumers are divided into 3 categories, residential sector, commercial & industrial sector, and public sector, with different increase rates of consumption. 3 load centers of Skun, Kampong Thom, and Siem Reap Provinces are taken into account for load demand forecast.

Load Demand Forecast : 

Load Demand Forecast KTC Cable / OX Engineering 2. Load Demand Forecast (Unit: MW)

Load Demand Forecast : 

Load Demand Forecast KTC Cable / OX Engineering 3. Electricity Consumption Forecast (Unit: MWh)

Soil Investigation : 

Soil Investigation Investigation point : 15 places Boring Machine : IN VECO-50M, 60m depth, 180mm diameter Standard Penetration Test (STP) : 14 holes Dynamic Cone Penetration Test (DCP) : 1 hole 15 points were selected from the following locations. Construction site for substation (4 places) Construction site for steel tower crossing the river (2 places) Construction site for steel tower at every around 30 Km. KTC Cable / OX Engineering

Tower : 

Tower Procedure for Tower Design ? The practical design of towers is necessary to figure out the amount of the budget. ? In order to calculate the weight of towers, the following actions were performed. • Type of towers, insulators, and other options are decided through “Tower Study” by inputting the route data. • Tower design conditions are chosen by referring to the weather data of the project area. • After the tower design conditions are simulated with Tower Maker, the weight and other variables are decided. KTC Cable / OX Engineering

Tower Calculation Result : 

Tower Calculation Result KTC Cable / OX Engineering

Tower Foundation : 

Tower Foundation Calculation of Tower Foundations After the simulation result of towers and the soil investigation data are obtained, the design conditions are decided, and then the type and dimension for each foundationis calculated to be fit for the specific conditions. An example foundation is given on the next slide. KTC Cable / OX Engineering

Tower Foundation : 

Tower Foundation KTC Cable / OX Engineering Without pile : 368 places With pile : 387 places Total : 755 places Length : 2.6~6 meter

Substation : 

Substation KTC Cable / OX Engineering 1. Skun Substation Bay - 230kV : 8 Set Bay - 115kV : 4 Set Transformer - 230kV/115kV, 100MVA : 2 Set Transformer - 230kV/22kV, 40/63MVA : 2 Set Capacitor - 230kV, 45MVAR : 1 Set Capacitor - 115kV, 70MVAR : 1 Set 2. Kampong Thom Substation Bay - 230kV : 8 Set Transformer - 230kV/22kV, 40/63MVA : 2 Set Capacitor - 230kV, 10MVAR : 1 Set

Substation : 

Substation KTC Cable / OX Engineering 3. Siem Reap Substation Bay - 230kV : 6 Set Bay - 115kV : 4 Set Transformer - 230kV/115kV, 100MVA : 2 Set Transformer - 230kV/22kV, 40/63MVA : 3 Set Capacitor - 230kV, 45MVAR : 1 Set Capacitor - 115kV, 70MVAR : 1 Set

Financial Analysis : 

Financial Analysis 1. Project Cost (Unit: USD) KTC Cable / OX Engineering

Financial Analysis : 

Financial Analysis 2. Analysis Basis Project cost base: Excluding taxes and duties Load factor: 50% of calculated load demand forecast O&M cost: T/L ; 1% annually of the construction cost Substation ; 3% annually of the construction cost Insurance cost: Included in O&M cost Administrative cost: Included in O&M cost License fee : 500Riel/1,000kwh (0.125USD/1,000kwh) Depreciation period : 20 years Residual value : 0% Equity ratio : 30% KTC Cable / OX Engineering

Financial Analysis : 

Financial Analysis 2. Analysis Basis Loan repayment period : 15 years (excluding construction period) Interest rate of loan : 5.2% annually Income tax : 20% BOT period : 30 years KTC Cable / OX Engineering

Financial Analysis : 

Financial Analysis 3. Analysis Results Base case Sensitivity analysisIn order to evaluate the impact of changes in conditions,“increase of construction cost” and “decrease of delivered power demand” have been applied as variables for the sensitivity analysis. KTC Cable / OX Engineering

Financial Analysis : 

Financial Analysis Estimated FIRR in different conditions KTC Cable / OX Engineering

Slide 38: 

Thank You !