Abstract
Joule losses in the power grids are a factor in the degradation of power grid equipment (lines and transformers), but also a shortfall for power companies, which must maximize their revenues. This is why in this article we present a study on the optimization of joule losses in a meshed electricity network interconnected to a very high voltage power line crossing Congolese territory for nearly one thousand five hundred (1500) kilometers. The value of interconnections no longer needs to be demonstrated in view of these technical, economic and social advantages. The object of this study is to assess the optimal node where the interconnection can be achieved which would cause fewer joule losses in the networks to be interconnected on this line. Indeed, it can have several possible nodes where the interconnection can be carried out, so it is necessary to simulate each configuration in order to evaluate the losses using the hybrid method including the genetic algorithm to provide different configurations and the Newton Raphson algorithm. Advanced integrating FACTS devices in this case STATCOM to perform load flow. The results are interesting because by injecting electrical energy to the network or to the line to the same selected, the joule losses are within the standards provided by the International Electrotechnical Commission.
Highlights
IntroductionWhen the physical flows of electrical energy pass over long distances, the joule losses resulting from this transit are significant, because of the high resistances due to the length of the conductors and the current intensities which pass through them
The simulation results obtained when the Congolese network absorbs the electrical energy from the PEAC have selected node 12 as the interconnection point and the voltage modules and phases, as well as the injected and absorbed powers are presented in Table A1 and Table A2 in Annex 2
That among the four (4) probable interconnection nodes, node 12 is selected as the interconnection node of the Congolese network to the PEAC, because at this node the joule losses in the Congolese network are equal to 0.22136 pu when it is perfectly compensated
Summary
When the physical flows of electrical energy pass over long distances, the joule losses resulting from this transit are significant, because of the high resistances due to the length of the conductors and the current intensities which pass through them To optimize these losses due to this transit, the choice of location to achieve the interconnection is essential. The genetic algorithms realize the possible configurations while the advanced Newton Raphson algorithm using FACTS performs the load flow calculation, of which the objective is to select an optimal configuration [2] [3] [4] [5] and [6] This hybrid algorithm is transcribed in the Matlab environment and an application is made on the interconnection of the Congolese network to the PEAC.
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