Abstract
Transmission Network Expansion Planning (TNEP) was studied considering voltage level, network losses and number of bundle lines using decimal codification based genetic algorithm (DCGA). TNEP determines the characteristic and performance of the future electric power network and directly influences the operation of power system. Up till now, various methods have been presented for the solution of the Static Transmission Network Expansion Planning (STNEP) problem. However, in all of these methods, STNEP problem has been solved regardless of voltage level of transmission lines. For this reason and according to various voltage levels and different number of bundle lines used in real transmission network which caused different annual losses, STNEP was studied considering voltage level, network losses and number of bundle lines using genetic algorithm. Genetic Algorithms (GAs) have demonstrated the ability to deal with non-convex, nonlinear, mixed-integer optimization problems, like the TNEP problem, better than a number of mathematical methodologies. The proposed method was tested on an actual transmission network of the Azerbaijan regional electric company, Iran, to illustrate its robust performance. The results were shown that considering the network losses in a network with different voltage levels and the number of bundle lines considerably decreased the operational costs and the network can be satisfied the requirement of delivering electric power more safely and reliably to load centers.
Highlights
Transmission Network Expansion Planning (TNEP) is a basic part of power system planning that determines where, when and how many new transmission lines should be added to the network
In order to evaluate effects of the network losses and planning horizon year on an actual transmission network, the proposed method was applied to this test network and the results were shown in Table 8 and 10
It was concluded that the network losses and voltage level of lines play important role in determining of network configuration and arrangement
Summary
Transmission Network Expansion Planning (TNEP) is a basic part of power system planning that determines where, when and how many new transmission lines should be added to the network. It minimizes the network construction and operational cost while meeting imposed technical, economic and reliability constraints. Transmission network expansion planning can be classified as static or dynamic. Static expansion determines where and how many new transmission lines should be added to the network during the planning horizon. If in the static expansion the planning horizon is categorized in several stages we would have dynamic planning[5,6]
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