1. Development of Transmission System Master Plan of Oman (2014-2030)
Dr. Adil Ghalib Al-Busaidi, PhD, MSc, BEng, CM, MIEEE
Asset Management and Planning Manager
Oman Electricity Transmission Company

2. Outline Introduction Methodology of the Master Plan development
Preliminary studies
Transmission Master Plan results
Findings, recommendations & way forward

3. 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…)

4. 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
Master Plan
5YCS
5 years window
Detailed Investments decisions
Strategic network structure
Short circuit ratings
Voltage level
15 years window

5. Methodology of the Master Plan development
Preliminary studies
Transmission Master Plan
2030 Target Transmission Structure
List of investments
Phasing of investments
Cost estimation and recommendations

6. Preliminary studies-security criteria
Data gathering from stakeholders:
Planning studies
Strategic documents for energy sector
Technical standards (generation, transmission,…)
Socio-economic data (population changes, GDP growth,…)
Definition of planning criteria & standards based on:
Grid Code
Transmission Security Standards
International standards

7. Preliminary studies-load demand forecast
Two complementary methods used:
Global [National level]: based on macroeconomic indicators (population changes, GDP,…)
Area-based [Local level]: based on forecasted development of each area

8. Preliminary studies-generation expansion plan
Capacity Adequacy Analysis:
Objective = advise additional capacity required by 2030
Generation Scenarios:
Objective = determine adequate location for additional capacity
Capacity Adequacy +
Generation Scenarios
Final Generation Expansion Plan

9. Preliminary studies-generation expansion plan

10. Transmission Master Plan results-2030 transmission structure
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

11. Transmission Master Plan results-2030 transmission structure
In addition: 4th EHV route to connect Duqm & Dhofar systems
Potential interest for PDO
2018
development of the Inner-Land backbone + connection SFZ–Mhadah (UAE)
development of 400kV to supply Muscat area
development of the Coastal backbone
interconnection MIS-Duqm-Dhofar
closing of the Southern Ring
MIS
Duqm
Dhofar
PDO

12. Transmission Master Plan results-key changes
2014
2030
400kV : not existing
220kV : transmission network
132kV : sub-transmission network
Well meshed in Muscat area
No SVCs
220kV = transmission of power
132kV = supply of load
400kV : transmission network
220kV : sub-transmission network
132kV : “distribution” network
Split in Muscat area
SVCs in Muscat
400kV = transmission of power
220&132kV = supply of load

13. Transmission Master Plan results-phasing of investments
2018
development of the Inner-Land backbone + connection SFZ–Mhadah (UAE)
development of 400kV to supply Muscat area
development of the Coastal backbone
interconnection MIS-Duqm-Dhofar
closing of the Southern Ring

14. Findings, recommendations & way forward
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 MIS
Way 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

15. Q&A
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