The Nigerian Electricity Supply Industry (NESI) that did not experience any challenge from water to fuel the hydroelectric stations for the past four months lost 90 Mega Watts (MW) due to water management constraint on Saturday.
According to a document on power sector activities that The Nation sighted on Tuesday, the NESI on Saturday experienced losses owing to water management in that was restored on Sunday.
A reliable industry source however told our Abuja correspondent that there was a “mechanical problem in Jebba” Hydro Station that was down on November 12.
The sector lost 3,514MW owing to vandalism of a gas pipeline.
The document added that the sector lost 279MW to line constraint, although there was no loss due to high frequency constraint.
The water, gas and line constraints culminated in a loss of about N1.86billion on the day under review that the Transmission Company of Nigeria (TCN) sent 3,269MW to the 11 distribution companies (DisCos).
NESI said: “On November 12 2016, average power sent out was 3269MWh/hour (up by 347MWh/h). The reported gas constraint was 3514MW. The reported line constraint was 279MW and the high frequency constraint is 0MW according to TCN.
The water management constraint was 90MW. The power sector lost an estimated N1,863,000, 000 on November 12 2016 due to constraints.”
The Nation also learnt that there was a system disturbance at 14:27hours on the day under review due to series of line trappings.
It added that Odukpani power plant was being prepared to evacuate four turbines.
The document said: “System disturbance at 14:27hrs on November 11 due to a series of line trippings. Further vandalism on the ELPS line has increased gas constraints and impacted generation negatively. Ikot Ekpene switching station undergoing pre-commissioning tests. Odukpani power plant is currently been prepared to evacuate 4 turbines.”
Investigation however shows that the sector recovered from the technical issue in Jebba to record 0MW water management constraint on Sunday.
According to NESI report, the TCN wheeled 3,476MW to the 11 DisCos on Sunday when power generation rose by 206MW.
The constraints led to a lost of about N1.88 billion in the electricity market on the day under review.
On the day under review, sector lost 3,591MW to gas constrain and 328MW to high frequency. NESI said on “November 13 2016, average power sent out was 3,476MW by 206MW. The reported gas constraint was 3,591MW. The reported line constraint was 0MW and the high frequency constraint was 328MW. The water management constraint was 0MW. The power sector lost an estimated N1,881,000,000 on November 13 due to constraints.”
Source: The Nation