Why TCN Directed GenCos To Reduce Generation

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Seun Olagunju - TCN
Seun Olagunju - TCN

The Transmission Company of Nigeria (TCN) has stated that it had to order the Generation companies to cut down power generation in the interest of the national grid due to high frequency.

This is coming as a reaction to the recent accusations made by Mr Lamu Audu, Managing Director of Mainstream Energy Solutions that the Transmission Company has been giving the GenCos directives to cut down generation or outrightly cutting down power generated and it has been having very negative effects on their plants and business.

Segun Olagunju, General manager, Public Affairs of TCN said that the directive was necessary as a result of DisCos refusing to take on more load considering the recent increase in generation. Since electricity cannot be stored but only used as it is being generated, there is an imbalance and subsequent disturbance in the system.

“Recently, high system frequency (more than 50HZ) has been observed, necessitating corrective measures. The options to bring down the frequency to 50Hz are:(a) Distribution Companies to absorb more load, (b) Generation Companies to reduce generation.

“The first option is the appropriate line of action. However, due to inexplicable reasons, some DISCOs failed to take more load as generation increases. This has left the system operator with no other option than to ask the GENCOs to reduce generation to ensure grid stability.

“The directive to GENCOs to reduce generation is imperative to maintain the integrity of the grid, as frequency higher than 50HZ could result in system disturbance. It is important to note that the directives are issued with a high sense of duty and responsibility to the nation and the entire electricity industry.

“The system operator’s decision is based on the fact that at normal operating frequency of 50Hz, the active power generated is equal to the active load consumed and losses. However, if the generated power is more than the load connected, the frequency rises higher than 50Hz, which can result in system disturbance.

“To correct this imbalance, the system operator, whose duty it is to maintain system stability, has no choice than to ask the generating stations to drop the load to sustain the network integrity. This is the practice all over the world. On the contrary, if the load connected is higher than the generated power, the frequency drops below 50Hz and can also lead to system collapse.” Olagunju said.

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