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Development of Transmission System Master Plan of Oman (2014-2030)

Dr. Adil Ghalib Al-Busaidi, PhD, MSc, BEng, CM, MIEEEAsset Management and Planning Manager

Oman Electricity Transmission Company

Outline Introduction

Methodology of the Master Plan development

Preliminary studies

Transmission Master Plan results

Findings, recommendations & way forward

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Introduction

Why we need Master planning?• To avoid costly reworks and upgrades• Control time and effort• Coordination across the sector• Have insight into the future challenges • Knowing the potential growth areas• Know the future challenges and get prepared

for it (new types of equipment…)

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Introduction- continued

• How we are going to use it?

• Decide voltage levels

• Medium term plan shall be compatible with the long term needs

• Securing overhead lines routes & grid stations locations

• Coordination of efforts with main stakeholders

• Plan for the required contracting strategies, financial resources and human resources

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Master Plan

2014-2030

5YCS5 years window

Detailed Investments decisions

Strategic network structure

Short circuit ratings

Voltage level

5 years window

15 years window

Methodology of the Master Plan development

• Preliminary studies

• Transmission Master Plan2030 Target Transmission

StructureList of investmentsPhasing of investments

• Cost estimation and recommendations

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Preliminary studies-security criteriaData gathering from stakeholders:

o Planning studies o Strategic documents for energy sector o Technical standards (generation, transmission,…)o Socio-economic data (population changes, GDP growth,…)

Definition of planning criteria & standards

based on:o Grid Codeo Transmission Security Standardso International standards

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Preliminary studies-load demand forecast Two complementary methods

used:1) Global [National level]: based on

macroeconomic indicators (population changes, GDP,…)

2) Area-based [Local level]: based on forecasted development of each area

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Preliminary studies-generation expansion plan

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Capacity Adequacy Analysis:Objective = advise additional capacity required by 2030

Generation Scenarios:Objective = determine adequate location for additional capacity

Capacity Adequacy

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Generation Scenarios

Final Generation Expansion Plan

Preliminary studies-generation expansion plan

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Transmission Master Plan results-2030 transmission structure

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• Coastal Backbone• Evacuation of new

coastal power plants (Sohar, Shinas, Suwayq,…)

• Interconnection with UAE (GCCIA) and possibly Iran in future

• Inner-Land Backbone• Evacuation of Ibri

power plant• Southern Ring

• Evacuation of Sur 1&2 power plant

Transmission Master Plan results-2030 transmission structure

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In addition: 4th EHV route to connect Duqm & Dhofar systemsPotential interest for PDO2018

development of the Inner-Land backbone + connection SFZ–Mhadah (UAE)

2018-2020development of 400kV to supply

Muscat area2021-2025

development of the Coastal backbone

interconnection MIS-Duqm-Dhofar 2026-2030

closing of the Southern Ring

MIS

Duqm

Dhofar

PDO

Transmission Master Plan results-key changes

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2014• 400kV : not existing• 220kV : transmission network• 132kV : sub-transmission

network– Well meshed in Muscat area

• No SVCs

220kV = transmission of power132kV = supply of load

2030• 400kV : transmission network• 220kV : sub-transmission network• 132kV : “distribution” network

– Split in Muscat area

• SVCs in Muscat

400kV = transmission of power220&132kV = supply of load

Transmission Master Plan results-phasing of investments

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2018development of the Inner-Land backbone + connection SFZ–Mhadah (UAE)

2018-2020development of 400kV to supply Muscat area

2021-2025development of the Coastal backbone interconnection MIS-Duqm-Dhofar 2026-2030closing of the Southern Ring

Findings, recommendations & way forward

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Findings:• Development of the EHV (400kV) network to serve as the main

transmission back bone• Reinforcement of HV (220&132kV networks) to serve as sub-

transmission system and provide enough injection points for the load demand

Recommendation:• Interconnection of Duqm and Dhofar networks with the MISWay forward:• Discussions with DISCOs on new grid stations locations• Issue tenders for routes surveys of the new lines• Coordinate with concerned authorities for securing the lands and

corridors• Long term financial planning and contracting strategies• Build technical capabilities to meet the future needs

Q&A

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