Impact of Distributed Generation Model on Power Flow’s Parameters of Electrical Power System: A Case Study of Photovoltaic Based Distributed Generation Units
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Date
2018-07-18
Authors
Sukkar, Shahd
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Publisher
Shahd Azzam Abed Allateef Sukkar
Abstract
In this thesis generalized regression neural network based model for photovoltaic based distributed generation units is proposed. The proposed model has two inputs which are solar radiation and ambient temperature, while, the output is the output current. Matlab environment is used to train, test and validate the proposed model. After that the developed model is applied to IEEE- 14 bus system so as to improve the voltage profile, decrease power losses and increase the reliability of the system.
But the grid needs some modifications to make the addition is acceptable, the total power losses of the power system after these modifications are about 45.96 MW and 182.551 MVAr. The performance of
the electrical power system with the proposed model of distributed generation unit is compared with the performance of the electrical power system considering a conventional model of the distributed generation unit that is talked about fixed power from the photovoltaic. Results show that Bus 4 is the suitable bus for an installation of distributed generation unit. Thus a photovoltaic system with capacity of 30 MWp is connected to the system by considering the proposed model and the conventional model (fixed power injection). It found that total real power losses of the system after adding the fixed distributed generation unit is about 37.288 MW. Meanwhile, the total reactive power losses are found to be 148.97 MVAr. On the other hand, by utilizing the proposed model (GRNN model), the total power losses of the system is found to be about 40.3 MW and 160 MVAr. Therefore, there is a difference of 3 MW between the two methods, Meanwhile using fixed output power for photovoltaic system will get an imaginary improvement because this method doesn’t take into account weather variations and absence of sun tonight , the utilization of conventional models for photovoltaic based distributed generation is not recommended as it exaggerates the improvement of the system and consequently affect negatively the reliability of the system
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Impact of Distributed Generation Model on Power Flow’s Parameters of Electrical Power System: A Case Study of Photovoltaic Based Distributed Generation Units