Technical Losses Reduction on the Nigerian National Grid
Authors/Creators
- 1. World Bank Africa Center of Excellence for Sustainable Power and Energy Development, University of Nigeria, Nsukka, Enugu State, Nigeria.
- 2. Department of Computer and Electrical Engineering, Olabisi Onabanjo University, Ibogun Campus, Ogun State, Nigeria.
- 3. Department of Electrical Engineering, Faculty of Engineering, University of Nigeria, Nsukka, Enugu State, Nigeria.
Description
For more than 30 years, the Nigerian National Grid has been beleaguered with 715 total incidences of voltage collapse. Regrettably, the control measures adopted by the Transmission Company of Nigeria, for technical losses minimization and voltage profile enhancement are ineffective when mostly desired. The study developed a model for losses minimization in the Nigerian 330 kV transmission grid. Simulation using fast decoupled load flow analysis at steady state identified the following transmission lines with losses above 5%: Jebba-Kainji (7.405%), Abuja-Shiroro (9.805%), Benin-Oshosbo (7.17%), Sapele-Benin (5.25 %), Benin-Onitsha (9.054 %), Onitsha-Alaoji (15.57%), Oshogbo-Ikeja West (10.59%), Ikeja West – Egbin (6.636%), Yola-Gombe (5.462%), Jos-Kaduna (5.987%), Mambila-Makurdi (7.781%). But with the placement of static synchronous compensator (STATCOM) at the optimal generator bus, the technical losses were minimized as follows: Jebba-Kainji (2.14%), Abuja-Shiroro (0.61%), Benin-Oshosbo (0.25%), Sapele-Benin (0.20%), Benin-Onitsha (3.07%), Onitsha-Alaoji (0.02%), Oshogbo-Ikeja West (0.223%), Ikeja West– Egbin (0.06%), Yola-Gombe (0.00%), Jos-Kaduna (3.27), Mambila-Makurdi (2.43%). Findings from the work show that out of 34 transmission lines of the 31-bus NNG, 11 transmission lines have real power losses above 5%. The results obtained before and after the placement of STATCOM prove the effectiveness of the proposed approach on 31-Bus Nigerian 330 kV transmission system.