Elec­tric­ity gen­er­a­tion dips by 774mw, drops to 3,292mw in 24hrs

Daily Trust - - BUSINESS - By Si­mon Echewo­fun Sun­day

Elec­tric­ity gen­er­a­tion yes­ter­day dropped by 774 megawatts (mw) barely 24 hours af­ter it reached a peak of 4,066mw, na­tional sta­tis­tics from the In­de­pen­dent Sys­tem Op­er­a­tor (ISO), a pub­lic firm has shown.

The grid recorded tremen­dous im­prove­ment on Sun­day af­ter 78,573 megawatts hours (mwh) was wheeled out for dis­tri­bu­tion to an es­ti­mated six mil­lion cus­tomers by 11 Dis­tri­bu­tion Com­pa­nies (DisCos).

It, how­ever fell to 2,876mw dur­ing the off­peak pe­riod, record­ing a dif­fer­ence of 1,190mw. This is a time of the day when in­dus­try ex­perts feel de­mand from cus­tomers re­duced and as such, power plants of­ten ramped down their gen­er­a­tion level.

By yes­ter­day, dur­ing the pe­riod of es­ti­mated high­est de­mand of elec­tric­ity of­ten called ‘peak pe­riod’, gen­er­a­tion level how­ever went down to 3,292mw sig­ni­fy­ing ad­e­quate power sup­ply for the vast cus­tomers in the fresh work­ing day.

Fur­ther sta­tis­tics from the Na­tional Con­trol Cen­tre (NCC), Osogbo where ISO con­trols the na­tion’s power pool re­vealed that this month, Au­gust, be­gan with high gen­er­a­tion of 4,282mw with a ca­pa­bil­ity to reach 4,878mw as at Wed­nes­day Au­gust 2, 2017.

How­ever, the trail­ing con­straints of load unutil­i­sa­tion caused by DisCos’ load de­mand (load re­jec­tion), in­ad­e­quate gas sup­ply and trans­mis­sion fre­quency af­fected sus­te­nance of the pos­i­tive trend. Sadly, power fell to a pitiable 2,833mw the same day.

Cus­tomers de­nied 2,133mw as load re­jec­tion, gas short­age trend

In the midst of the power in­ad­e­quacy in Nige­ria, a huge level of elec­tric­ity has con­tin­ued to be unutilised in the na­tional grid and many of the es­ti­mated six mil­lion elec­tric­ity users de­prived of sus­tained power sup­ply. The grid data pro­vided for last Thurs­day showed that 2,133mw was lost to these mon­strous is­sues.

The ma­jor dis­ap­point­ment to the na­tional grid and to elec­tric­ity cus­tomers last Thurs­day was with the 11 Dis­tri­bu­tion Com­pa­nies (DisCos) when 1,253mw was lost to their var­ied load de­mand con­straints re­sult­ing in con­straints manag­ing the fre­quency of trans­mis­sion net­work.

Nine power sta­tions were af­fected by this with 15 of their tur­bines forced to be­come idle. From the anal­y­sis, the big­gest losers were two tur­bines in Afam VI that lost 283mw.

Sus­tained gas sup­ply to the ther­mal sta­tions has been a ma­jor chal­lenge. This cut down 505mw elec­tric­ity sup­ply in four tur­bines across four power sta­tions un­der the Na­tional In­te­grated Power Projects (NIPP). Their ca­pac­ity record showed that Geregu NIPP could gen­er­ate 145mw. Alaoji’s two tur­bines would have pro­duced 240mw and a tur­bine in Omo­to­sho would have fetched the grid an­other 120mw.

There was also a chal­lenge with the trans­mis­sion lines which caused the loss of 375mw, shut­ting out eight tur­bines in five power sta­tions. While a tur­bine in Omoku sta­tion lost 115mw, Omo­to­sho Gas lost 114mw from three tur­bines, and Olorun­sogo Gas lost 76mw from two tur­bines. A tur­bine in Olorun­sogo NIPP lost 38mw, and an­other in Omo­to­sho NIPP lost 32mw.

Three hy­dropower plants con­strained in rainy sea­son

Daily Trust an­a­lysed the gen­er­a­tion level of the three hy­dropower sta­tions which was ex­pected to be high dur­ing the rainy sea­son. Data re­vealed that the ex­pec­ta­tions are be­ing cut short due to cer­tain tech­ni­cal con­straints. Kainji hy­dro which has in­stalled ca­pac­ity of 440mw pro­duced 232mw last Wed­nes­day. 208mw was con­strained be­cause four of its units have tech­ni­cal is­sues caused by bat­tery loss, high tem­per­a­ture and fire.

Jebba Hy­dro has 386mw ca­pac­ity but gen­er­ated 251mw. 135mw was lost as three of its units have fre­quency main­te­nance is­sues. Shi­roro hy­dro has 600mw ca­pac­ity be­ing the largest of the hy­dro plants but it pro­duced just half of its ca­pac­ity as 300mw was lost.

Elec­tric­ity py­lon

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