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IJSTR >> Volume 6 - Issue 10, October 2017 Edition

International Journal of Scientific & Technology Research  
International Journal of Scientific & Technology Research

Website: http://www.ijstr.org

ISSN 2277-8616

Load Flow And Contingency Studies For The Nigeria 31-Bus 330-Kv Power System

[Full Text]



Onaopemipo Taiwo



Compensators, Efficiency, Power flow analysis, Power loss, Tap Changing Transformers, Transmission lines, Voltage limit



It is desirable for an electric network to be 100% efficient, in which case the total power generated in the network equals the total power consumed. However, due to the presence of impedances in transmission lines connecting buses as well as Transformer windings, some inevitable power losses are incurred. It becomes necessary to bring these losses to their lowest ebb to reduce the cost of generating power as well as improve the overall efficiency of the network. In this vein, the 330-kV, Nigerian 31-Bus system has been selected for power flow analysis. A careful observation of this system shows that some bus voltages are below the permitted voltage limit of 0.95pu-1.05pu (313.5kV-346.5kV). Kano (0.7193pu), Gombe(0.7961pu), Jos (0.8123pu), Katampe (0.9044pu), Kaduna (0.8530pu), Yola (0.7975pu) and Jalingo (0.7917pu) are buses that have violated this limit. Kano bus (0.7193pu) has the lowest voltage because it has a large load and is far from Generator buses. The essence of this analysis is to use tap changing Transformers as well as Capacitive and Inductive shunt compensators to improve the bus voltages to acceptable values while bringing the total power losses to the barest minimum. The method employed in this power flow analysis is the Newton-Rapson (N-R) iterative technique written in code-based “R”.



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