Water Management Constraint Hits Electricity Industry


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, the NESI on Saturday experienced losses owing to water management in that was restored on Sunday.

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.”

However, investigation 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 loss of about N1.88 billion  in the electricity market on the day under review.

On the day under review,  the power sector lost 3,591MW to gas constraint 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.”

  • The Nation


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