Abstract
Distributed Generation (DG) has become an essential part of the smart grids due to the widespread integration of renewable energy sources. Reactive power compensation is still one of most important research topics in smart grids. DG units can be used for reactive power compensation purposes, therefore we can improve the voltage profile and minimize power losses in order to improve the power quality. In this paper two methods will be used to accomplish the mentioned tasks; the first technique depends on the reactive power demand change of the proposed network loads, whereas the second technique uses an algorithm to control DG units according to the measured voltage values in the feeders to generate the needed reactive power. Both methods were applied to different scenarios of DG unit positions and different reactive power values of loads. The chosen DG unit is made up of a Type-4 wind farm which could be used as a general unit where it is able to control reactive power generation in a wider range separately from active power. The simulation results show that using these two methods, the voltage profile could be improved, power losses reduced and the power factor increased according to the placement of DG units.
Highlights
IntroductionDistributed energy resources are becoming more and more common in present day smart grid networks, especially renewable sources such as wind and solar power generators
Distributed energy resources are becoming more and more common in present day smart grid networks, especially renewable sources such as wind and solar power generators.Distributed generation (DG) has a lot of advantages such as reduced investment costs, flexibility, reliability, peak power shaving and clean power [1,2,3,4,5,6,7,8]
DG units can play an important role in improving voltage profiles, reducing power losses and improving power quality in cases of increases in demand for reactive power but the following should be noted:
Summary
Distributed energy resources are becoming more and more common in present day smart grid networks, especially renewable sources such as wind and solar power generators. This is an algorithm based on decomposition of sensitivity matrixes utilized for voltage regulation This method is suitable for large meshed grids whereby each one is split into many smaller grids [16]. A load flow analysis algorithm was utilized in a distribution network and this algorithm has been applied to a network which suffered from voltage drop and power losses; applying the methodology proposed in the scheme, the voltage level is found to have improved from 0.89 p.u. to 0.95 p.u. and power losses were reduced by 47.43%. We will assume a gradual increase in reactive power and we will use a DG unit to control voltage and power losses using two techniques in addition to choosing the optimal place for the DG unit, and investigating the changes of power factor in a distribution network embedded with a wind farm DG unit. To further buttress the effectiveness of the proposed scheme, a comparative analysis of the various results obtained was performed and thereafter discussed
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
