Loadability Analysis of the Effect of Generation and Transmission Expansion in Southern Nigeria

Research Area: Volume 7,Issue 2, March 2018 Year: 2018
Type of Publication: Article Keywords: Transmission Line, Network, Loadability, Load Flow, Maximum Load, Power Station
Authors:
  • F. O. Agbontaen
  • S. A. Ike
  • T. Aika
Journal: IJEIR Volume: 7
Number: 2 Pages: 139-144
Month: March
ISSN: 2277-5668
Abstract:
Electrical energy demand in Nigeria has increased due to economic activities as a result of increase in population. The Southern region, experience stranded power due to the proximity of most of the gas thermal power stations and inadequacy of the tie lines for load evacuation. The southern buses also experience over voltage as a result of the reactive power generation from the various power plants within the vicinity. The existing 330kV Nigeria transmission network was enhanced by the introduction of new lines and power stations and the effect was analyzed. Newton-Raphson algorithm in ETAP 12.6 was used to simulate and analyze the network. The parameters used for the study included bus data, transmission lines power rating, generators active power, transformers rating and base load. The base case operating condition as obtained from the power flow on which the various transfer cases were implemented, gives a fair generation and loading pattern of the Nigerian grid. The total installed generating capacity of the base case considered was 11,948MW out of which 4,420.4MW was available for load level of 3,633.6MW. Result shows that the maximum load the existing network can accommodate when all single circuits in the network is changed to double circuit and ten (10) transmission lines and four (4) power stations is inserted into the network is 12,342.296MW and 6,429.228MVar at a loading capacity of 12,059.054MW and 7,411.694MVar. When the Newton – Raphson iteration method was applied, the enhanced network evacuated 97.71% of the energy, while 82.2% was evacuated by the existing network

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