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POWER TRANSMISSION NETWORK

The lengths of electrical transmission networks grew by (9​​​​​​​​%) to reach (65,186) km-circular by launching a number of new projects, and also strengthened enhanced projects, aiming for improvement and development of power transmission networks and increasing their operational efficiency. A total (57) new substations and (205) transformers were added. (16) transformers were installed in current transmission substations and (3) were replaced, amounting to a total capacity of (42,807) MVA. Transmission networks measuring about (5,389) km-circular were also added.

The total voltage of the substations and ultra-high voltage substations reached (812) and (2,528) transformers with a total capacity of (273,715) MVA.

National Grid SA works to regularly improve and develop transmission networks (110 - 380) KV in all sectors of the Saudi Electricity Company (Central, East, West and South). The Company aims to raise the readiness of the network and ensure the continuity of its reliability.

Also, the Company gives great importance to the pilgrimage season each year, working to avoid any electrical interruptions in the holy sites that could affect pilgrims. This is achieved by advanced planning of the maintenance and forecasting workloads in addition to processing and fully preparing for any emergency well in advance.

The total peak load of the Kingdom during 2015 reached (62,260) MW with a growth of (10%) over 2014’s peak of (56,547) MW.

​In 2015 we launched a number of new projects and enhanced existing projects to improve and develop energy transmission networks and raise operational efficiency. Among the most prominent of those projects :

Ultra High Voltage Projects (230 - 380) KV :
• Adding (21) transmission substations and (108) transformers, at a total capacity of (34,322) MVA.
• Adding new overhead and underground cable networks measuring about (3,602) km-circular.
• Enhancing transmission substation efficiency with (3) transformers, with a total capacity of (1,254) MVA.


High Voltage Projects (110 - 132) KV :

• Adding (36) new transmission substations and (99) transformers with a total capacity of (6,391) MVA.

• Adding new overhead and underground cable networks measuring about (1,788) km-circular.

• Enhancing existing transmission substations with (11) transformers, with a total capacity of (688) MVA.

• Replacement of (3) transformers with a total capacity of (152) MVA.

These projects reflect the growth in the power transmission grids by (9%) to reach (65,186) km-circular by the end of 2015 compared to 2014.

Transmission Network Lengths (110  KV - 380 KV)

 

The network spreads across all sectors of the Company and the Kingdom, where the relative distribution of power transmission networks comprises length ratios of (32.3%), (26.8%), (16.4%), (24.6%) for the Central, Eastern, Western, and Southern sectors respectively.

 Relative Distribution of the Lengths of the Transmission Networks (110 KV - 380 KV) in 2012

 

The electricity networks have also been improved to include (57) transmission substations, bringing the total number of substations by the end of 2015 to (812). The increase in 2014 was (7.5%).

Number of Power Transmission Substations

 

The percentage of growth in the number of transformers reached (9%) in 2015, bringing the number of transformers to (2,528) compared to (2,307) transformers in 2014. The increased capacity transformers transfer energy to (273,715) MVA, with a growth rate of (18%) for 2015 compared to 2014‘s (230,908) MVA.



 

Number of Power Transmission Substation Transformers

 

 

 

Total Capacity of Power Transmission Substation Transformers

 

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