TRANSMISSION COMPANY OF NIGERIA
TCN engineers have installed nine power transformers this year. The transformers, which vary in capacity from 30MW to 300MW, were installed by TCN engineers and have all been connected to the national grid. The transformers include the following:
100MVA Power Transformer in Ogba Substation, Lagos State
On January 7th, 2020, a new 100MVA 132/33kV power transformer was energized in Ogba Transmission Substation, Lagos State. The newly energized transformer which was installed under supervision of TCN engineers has increased the capacity of the substation from 165MVA to 265MVA.
Prior to the installation of the 100MVA power transformer, Ogba Substation had a total of two (2) units of 60MVA 132/33kV power transformers and one (1) unit of 45MVA 132/33kV mobile power transformer. To ensure optimal utilization of the newly installed power transformer, a brand new switchyard made up of 132kV, 33kV and three (3) number 33kV feeder bays was equally installed and commissioned.
The increase in the substation's capacity, from 165MVA to 265MVA, means that the substation has more bulk electricity available for Ikeja Disco to take to its customers within Ikeja Industrial Area, and environs.
To optimize the capacity of the newly commissioned 100MVA at Ogba and other substations feeding Ikeja Distribution Company, TCN has already imported high capacity conductors and would soon conclude on reconductoring contract that will expand capacity of the transmission lines supplying the substation. This will substantially increase the current capacity of the lines.
40MVA Mobile Transformer in New Etsako Substation, Edo State
On the 9th of January, 2020, TCN energized a newly installed 40MVA, 132/33kV mobile power transformer in the new Estako Transmission Substation.
The 40MVA 132/33kV mobile transformer was completed through collaboration between TCN and Edo State Government, where the State Government built the control room while TCN's in-house engineers installed other substation equipment and commissioned the substation. The new substation provides relief to existing Irrua Substation in the state, as some areas previously served by Irrua would now take supply from the new Etsako Substation.
With the new 40MVA Etsako substation, TCN now has increased transformer capacity which translates to increased bulk power for the Benin Electricity Distribution Company's to take to customers within its franchise area.
300MVA Transformer in Asaba Substation, Delta State
On the 10th of January, 2020, for the first time, TCN energized a 300MVA 330/132/33kV capacity power transformer installed by TCN in-house engineers.
The new Asaba 300MVA 330/132/33kV capacity power transformer replaced a decommissioned 150MVA 330/132/33kV Siemens brand transformer, commissioned by NIPP on the 15th of February, 2015.
Before the newly energized 300MVA power transformer was installed, TCN temporarily fed the Asaba Transmission Substation through the Onitsha-Asaba 330kV transmission line connected to the Onitsha - GCM 132/33kV transmission line. This restricted maximum load transmission on Onitisha – Asaba transmission line.
With the commissioning of the new 300MVA power transformer, TCN now has available 240MW bulk electricity available in Asaba TS, that would enable Benin Electricity Distribution Company (BEDC) distribute more stable electricity to its customers in Asaba Metropolis and environs.
60MVA Power Transformer in Aja Substation, Lagos State
On 27th January 2020, TCN commissioned another 60MVA at the Aja 132/33kV transmission Substation, Lagos State. Before the installation and commission of the new power transformer, the transformer capacity of the substation was 220MVA, this has now increased to 280MVA.
The transformer which was installed by TCN contractor has increased the capacity of the substation by 48MW increasing available bulk electricity for Eko Distribution Company to take to its customers in Aja and environs.
60MVA Power Trasnformer in Gusau Substation, Zamfara State
On the 23rd of January 2020, a 45/60MVA power transformer was commissioned in TCN's Gusau Transmission Substation, Zamfara State. This upgraded the substation's capacity from 60MVA to 120MVA. The new transformer was installed by TCN engineers and has increased bulk supply to Kaduna Electricity Distribution Company for consumers supplied from Gusau Substation.
< p align="justify">30MVA Power Transformer in Egbin Substation, Lagos State
Also, on the 23rd of January 2020, a 30MVA power transformer was commissioned in Egbin Substation. With the additional 30MVA at 132kV level, the communities around Egbin can be supplied directly from the station. The installation was carried out wholly by TCN engineers.
45MVA Power Transformer in Apapa Road Substation, Lagos State
On the 24th January 2020, TCN commissioned a 45MVA 132/33kV power transformer in its Apapa Road Substation. This is in view of the planned rehabilitation of the Apapa Gas Insulated Substation (GIS) in Lagos. TCN engineers installed and energized the 45MVA 132/33kV power transformer which has been connected to the grid. The transformer would provide alternative source of power supply to Ikeja Disco for consumers in Apapa and environs.
45 MVA Power Transformer in Ilupeju Substation, Lagos State.
On 22nd June, 2020, TCN energized a brand new 45MVA 132/33kV power transformer at its Ilupeju 132/33Kv Transmission Sub-Station, Lagos. The power transformer was installed in-house by TCN engineers. The 45MVA power transformer is a replacement to a faulty 45MVA power transformer which had been faulty and disused in the station. The new power transformer has increased bulk power transmission to Ikeja Distribution Company for its customers especially in Igbobi area and environs.
30MVA Power Transformer in Iseyin Substation, Oyo State
On the 19 July, 2020, a brand new 30MVA 132/33kV power transformer and its associated 132/33kV bays was commissioned at Iseyin Transmission Station, Oyo State.
This increased the wheeling capacity of the substation from 40MVA to 70MVA and consequently the quantum of power available for Ibadan Electricity Distribution Company (IBEDC) to take to its customers in Oyo State and environs.
The transformer installation project was initially contracted out on the 31st of May, 2013, taken over and completed in-house by TCN engineers.
The installed capacities and locations of the transformers are listed in the table below:
TCN is diligently implementing the rehabilitation and expansion of the nation's grid with the goal of ensuring a very robust and efficient transmission network. The Company is determined to ensure that all on-going transmission projects across the country under its Transmission Rehabilitation and Expansion Programme (TREP) are completed on time.
