Abstract
This article presents an optimal placement and sizing of distribution static compensator (DSTATCOM) in radial distribution networks as multi-objective optimization with the objective of power loss reduction, voltage profile improvement and network reliability considering different variable demands using whale optimization algorithm (WOA). The WOA is inspired by the hunting behavior of humpback whales. The optimal location and size of DSTATCOM are considered as decision variables that are determined using the WOA. Network reliability is defined as energy not supplied (ENS) of the customers caused by line outages. The proposed method is implemented on IEEE 33-bus and Ahvaz 59-bus distribution networks. The optimal placement and sizing of DSTATCOM are investigated considering different residential, commercial and industrial loads, and also the effect of incorporating reliability is evaluated on power loss, minimum voltage and ENS. The simulation results show that the power loss and ENS are declined and also voltage profile is improved by determining the location and size of DSTATCOM in the networks in different loading conditions using the WOA. The obtained results demonstrate that considering reliability further reduces the ENS and more customer demand is met. The power loss decreases 21.60%, 30.71%, and 22.03% for residential, commercial and industrial loads in the 33-bus network and 26.86%, 31.94%, and 24.39% for the 69-bus network, respectively compared to base networks. Moreover, the performance of the WOA is compared with previous studies and the results indicate the superiority of the proposed method.
Highlights
Power loss created in the distribution networks is divided into two main parts, 60% of which is wasted in the lines and 40% in the transformers
In this article, the multi-objective optimal placement and sizing of DSTATCOM in IEEE 33-bus and Ahvaz 59-bus networks is presented with the objective of losses reduction, voltage profile and reliability enhancement with weighted coefficient method considering variable demands
Reliability is defined as energy not supplied index for network customers
Summary
Power loss created in the distribution networks is divided into two main parts, 60% of which is wasted in the lines and 40% in the transformers. The associate editor coordinating the review of this manuscript and approving it for publication was Yu Liu. reactive power sources in distribution networks have attracted more attention to exploit and enhance the operation of power distribution networks. Power loss reduction and voltage profile improvement are important challenges for the power network [3], [4]. Various methods are implemented for reducing the losses as well as improving the voltage profile in the networks. One of the conventional methods is the use of reactive compensation sources.
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