Transmission company gives reason for collapse of national grid

The Transmission Company of Nigeria (TCN) has given a report on the collapse of the national grid

– The head of TCN, Mohammed Usman, gave his explanation during a news conference in Abuja

– Usman said that the collapse must have been caused by malfunctioning of one of the generators

The Transmission Company of Nigeria (TCN) has said that the collapse of the national grid on Friday, May 8, was caused by a multiple tripping on its substation in Onitsha, Anambra.

The managing director of TCN, Mohammed Usman, made the disclosure at a news conference in Abuja, The News Agency of Nigeria (NAN) reports.

The national electricity grid had on Wednesday experienced some disturbances resulting in reduction of electricity allocation to electricity distribution companies in the country.

The Yola electricity distribution company said it was allocated 0MW during the period while the Abuja electricity company said it received 20MW. Both electricity companies supply power to a minimum of three states each.

Mohammed said that the collapse may also have been triggered because one of the generators went off.

“What happened a day before yesterday at 14:32 hours was a case of system collapse, we had tripping. The reason for the grid collapse was that there was a multiple tripping around Onitsha substation. We are also suspecting that one of the generators went out.

“We have sent our team of engineers to go and investigate, we normally investigate this kind of disturbances,’’ he said.

He however, said that in spite of the fragile nature of the nation’s power grid, TCN had achieved some level of stability on the national grid.

“Although, we have achieved some level of stability on the grid through the massive investment that we have done in the last two years.

“It does not mean that our grid has become disturbance free, because our grid is still very fragile. It is a journey that we are in that will take us to have a modern and stabilised grid.

“You remember, I had told you that we need to achieve four important things to have a stabilised grid.

“We need to have critical investment in lines and substations so that we put N-1 across the country, that will ensure that any equipment that goes out at any point in time will not affect supply on that area.

“For example, what happened in Apo recently, where we had a transformer that got burnt, we restored supply in two hours, because we had N-1 in that substation and that is what we are trying to achieve in all the country,” he said.

He said the company had raised 1.6 billion dollars for investment in lines and transmissions saying that attainment of the required investments in transmission would take some time.

“It is not what we will do in one day; the investment project for northern corridor transmission project, we just advertised; the one for Abuja, transmission project, we just signed, the one for Lagos and Ogun transmission project, we are about to launch the procurement process.

“The one for World Bank, we just launched the project, but the equipment has not arrived, so we are on a journey,’’ he said.

Mohammed said that there was urgent need to have a functional SCADA in the power sector to monitor activities on the national grid.

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“If we have a functional SCADA, it will show clearly what happened on the grid, and that is why we in TCN, deployment of SCADA is not an option, we have to deploy it. Because for us to have modern grid you need to have a functional SCADA, but management of the grid,’’ he said.

He said there was also urgent need to have a commensurate investment on the distribution chain to ensure a stable grid in the country.

The collapse is coming a day “after the national grid rose to 5,114 megawatts”. The collapse has affected 11 distribution companies. Oyebode Fadipe who is the spokesman of Abuja Electricity Distribution Company (AEDC) said the collapse reduced its allocation to 20 MW.

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