Investigation of Nigerian 330 Kv Electrical Network with Distributed Generation Penetration – Part I: Basic Analyses.
F. K. Ariyo,
M. O. Omoigui
Issue:
Volume 1, Issue 1, December 2012
Pages:
1-19
Published:
30 December 2012
Abstract: The first part of this paper presents the basic analyses carried out on Nigerian 330 kV electrical network with distributed generation (DG) penetration. The analyses include load flow, short circuit, transient stability, modal/eigenvalues calculation and harmonics. The proposed network is an expanded network of the present network incorporating wind, solar and small-hydro sources. The choice of some locations of distributed generation has been proposed by energy commission of Nigeria (ECN). The conventional sources and distributed generation were modeled using a calculation program called Po-werFactory, written by digsilent. Short-circuit analysis is used in determining the expected maximum currents, while transients stability and modal analyses are considered during the planning, design and in determining the best economical operation for the proposed network. One common application of harmonic analysis is providing solution to series resonance problems. Also, they are very valuable for setting the proper protection devices to ensure the security of the system.
Abstract: The first part of this paper presents the basic analyses carried out on Nigerian 330 kV electrical network with distributed generation (DG) penetration. The analyses include load flow, short circuit, transient stability, modal/eigenvalues calculation and harmonics. The proposed network is an expanded network of the present network incorporating win...
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Investigation of Nigerian 330 Kv Electrical Network with Distributed Generation Penetration – Part II: Optimization Analyses
Issue:
Volume 1, Issue 1, December 2012
Pages:
20-30
Published:
30 December 2012
Abstract: The objective of this paper is to present the tools implemented in PowerFactory for the optimization of the proposed network. It involves the calculate optimal power flow analysis (OPF); optimal placement, type and size of capacitors in the network; the optimal type of reinforcement cables and overhead lines and lastly, optimization of a certain objective function in a network, whilst fulfilling equality constraints (the load flow equations) and inequality constraints (that is, generator reactive power limits). The applications of the OPF include transmission line overload removal, transmission system control, available transfer capability calculation (ATC), real and reactive power pricing, transmission component valuation, and transmission system mar-ginal pricing. Power capacitors are very useful for power factor correction, loss reduction, voltage profile improvement and dis-tribution system-capacity release/increase. The conductor, which is determined by this optimization method, maintains acceptable voltage levels of the radial distribution system. Besides, it gives maximum saving in the capital cost of conducting material and cost of energy losses. The method also shows that only proper selection of optimum branch conductors reduces losses.
Abstract: The objective of this paper is to present the tools implemented in PowerFactory for the optimization of the proposed network. It involves the calculate optimal power flow analysis (OPF); optimal placement, type and size of capacitors in the network; the optimal type of reinforcement cables and overhead lines and lastly, optimization of a certain ob...
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