Prior to the enforcement of this policy, the grid system was like “Jankara market” where trading activities are informal and unorganized. DISCOs’ operated a model based on sending electricity to high income-yielding areas where revenue realized is equal to energy consumed while asphyxiating areas with low expected income that is unaccounted for. This liability was hanging over the DISCOs’ like a sword of Damocles
This template gave room to the phenomenon of “load rejection” as healthy feeders are switched off due to low revenue collection and this practice leads to high system frequency with adverse effect on the whole grid system, giving rise to the ramping up and down or the outright shutting down of generators to control the high system frequency in order to prevent system collapse as the frequency operating range is always exceeded and machine relay settings violated.
Below is a random template of the difference between peak and lowest generation before and after NERC commenced implementation of this lofty policy of a 24 hour load monitoring of DISCOs’ feeders to ensure that they carry their allocated load that is computed based on their submitted daily nominations and available generation. In case of infractions, the affected DISCO is expected to submit a valid reason (faults, emergency outages etc) for their inability to maintain their load allocation.
Random Sampling of Peak and Lowest Generation Before and After the Commencement of the Policy
S/N |
Date |
Peak Gen. (MW) |
Time (HRS) |
Lowest Gen. (MW) |
Time (HRS) |
Diff. between Peak and Lowest Gen.
(MW) |
1 |
05/01/22 |
4,779.7 |
2115 |
3,839.4 |
0400 |
940.3 |
2 |
25/01/22 |
5,030.4 |
2145 |
3,877.0 |
0800 |
1,153.4 |
3 |
31/01/22 |
4,778.4 |
2115 |
3,677.6 |
1400 |
1,100.8 |
4 |
01/02/22 |
5,183.7 |
2115 |
3,825.0 |
0400 |
1,358.7 |
5 |
05/02/22 |
4,862.9 |
2115 |
3,707.3 |
0400 |
1,155.6 |
6 |
27/02/22 |
4,550.1 |
0600 |
3,595.4 |
1700 |
954.7 |
7 |
05/03/22 |
4,402.9 |
1100 |
3,781.8 |
1600 |
621.1 |
8 |
25/03/22 |
4,124.2 |
0600 |
3,614.8 |
1400 |
509.4 |
9 |
25/04/22 |
4,193.8 |
2200 |
3,456.4 |
2400 |
737.4 |
10 |
30/04/22 |
4,516.2 |
2200 |
4,007.2 |
0300 |
509.0 |
11 |
22/05/22 |
3,751.1 |
2145 |
3,359.9 |
1400 |
391.2 |
12 |
20/06/22 |
3,540.6 |
0500 |
3,176.6 |
2300 |
364.0 |
13 |
29/06/22 |
3,137.2 |
1500 |
2,869.3 |
1900 |
267.9 |
14 |
22/07/22 |
3,945.8 |
0600 |
3,595.3 |
0400 |
350.5 |
15 |
05/08/22 |
4,193.3 |
0600 |
3,780.0 |
0400 |
413.3 |
16 |
17/09/22 |
4,362.4 |
0600 |
3,817.4 |
0400 |
545.0 |
17 |
19/11/22 |
4,218.9 |
2400 |
3,742.4 |
1100 |
476.5 |
18 |
20/01/23 |
3,948.0 |
2130 |
3,458.8 |
1700 |
489.2 |
19 |
05/02/23 |
4,674.4 |
0600 |
4,233.3 |
1100 |
441.1 |
20 |
09/02/23 |
4,481.6 |
1930 |
4,185.2 |
1400 |
296.4 |
Source: Daily Broadcast, NCC
The implementation of this load monitoring policy by NERC has restored sanity and stability to the grid and improve power supply to customers.
NERC should give impetus to the implementation of other extant policies such as compelling DISCOs’ to provide meters to new customers, elimination of the exploitative estimated billing system, reducing outage downtime of faulty feeders, especially in unmetered parts of their franchise and the restoration of the pre-privatization 24-hour shift duty for technical staff etc.
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