Comprehensive Option Assesment - UNEP
Comprehensive Option Assesment - UNEP
Comprehensive Option Assesment - UNEP
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Module 2: <strong>Comprehensive</strong> <strong>Option</strong>s <strong>Assesment</strong> Stages<br />
<strong>Option</strong>s inventory Screening Coarse ranking Fine ranking<br />
Screening and ranking team to<br />
add options and where<br />
stakeholders identified new<br />
options:<br />
· Project scale 10-50 MW,50-<br />
100 MW, and 100-300 MW<br />
· Regional diversity and spread<br />
across basins in the country<br />
Mix of run-of-river, peaking,<br />
and storage options<br />
Criteria reflected:<br />
Congruence with regional<br />
development policies.<br />
Construction road<br />
transmission access<br />
Hydrology and cost.<br />
Watershed conditions<br />
Bank/national safeguard<br />
policies on social and<br />
environment aspects<br />
Indices (e.g. persons<br />
resettled and land<br />
take/MW, biodiversity<br />
impact)<br />
· Current level of study<br />
Techno-economic criteria:<br />
Standardized design<br />
parameters<br />
Levelized power cost<br />
Power system fit<br />
Environmental-social<br />
criteria:<br />
Based on rapid appraisals<br />
Biography and social impact<br />
sub-criterion<br />
Consultations with affected<br />
communities.<br />
Techno-economic criteria:<br />
Reconnaissance layout<br />
Levelized power cost<br />
Power system fit<br />
Internalized environment and<br />
social management.<br />
Risk analysis<br />
Environmental-social criteria:<br />
Preliminary EIA- level<br />
88 impact sub-factors<br />
22 enhancement sub-factors<br />
Consultation with affected<br />
communities<br />
Source: NEA and CIWEC, 1998<br />
Table Coarse ranking composite technical/economic criterion<br />
Criteria Scoring system Weighting<br />
Economic Supply Cost<br />
(75%)<br />
Discounted cost/Discounted energy (in US¢/kWh), inclusive of civil, E&M,<br />
transmission, road access, environmental mitigation and cost contingencies<br />
75%<br />
System Fit for Medium-Term<br />
Supply (25%)<br />
Project size Installed capacity in three size ranges reflecting what is needed in 3%<br />
the 'project basket' for system planning<br />
Firm Energy<br />
Contribution<br />
Flexibility of<br />
dispatch<br />
R e g i o n a l<br />
Location<br />
Source: <strong>UNEP</strong>, 2007; NEA and CIWEC 1998.<br />
Ratio of firm energy to average energy production from the<br />
project<br />
Storage and ability to dispatch at peak or seasonally<br />
Regional supply-demand balance<br />
10%<br />
7%<br />
5%<br />
100%<br />
<strong>Comprehensive</strong> <strong>Option</strong>s Assessment for sustainable development of infrastructure<br />
Training Manual<br />
43
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