No abstract

The network reconfiguration is reshaping of the network system with supporting of sectionals/tie switches so as to reduce the power loss and to improve the voltage profile of the system. This paper presents the reconfiguration of a network system with location of distributed generation (DG) is to reduce power loss and in order to improve the voltage stability of the radial distribution systems (RDS). In this approach, the objective function is formulated based on the various technical issues such as power losses, thermal limit, voltage profile and stability of the system. The network reconfiguration problem is a nonlinear optimization problem; a chaotic artificial bee colony (CABC) algorithm is implemented to find the optimal solution of this approach. It is one of the enhanced versions of artificial bee colony algorithm. Two different cases are considered of this approach such as (i) only reconfiguration and (ii) reconfiguration with DGs. The efficiency of the proposed algorithm is validated by testing it on 33-node and 69-node radial distribution systems. The simulation results of this proposed approach are compared with other methods available in the earlier report.

Electric power is one of the inherent things in the modern world. Recently, the renewable and non-renewable energy based Distributed Generator (DG) units are used for generation of electric power to satisfy the local load of the distribution system. This paper proposes a chaotic artificial bee colony (CABC) algorithm based optimal placement and sizing of various categories of DGs that are simultaneously placed in the distribution system according to their technical benefits and planning aspects. Four different types of DGs, such as capable of supplying real power only, capable of supplying reactive power only, capable of supplying real and reactive power, capable of supplying real power and absorbing reactive power has been considered in this approach. The objective is to reduce the resource cost and network loss in such a way that line flows should be within limit and to improve the voltage profile and stability of the system. The Voltage Stability Index (VSI) is used to identify the most sensitive node in the system. The constant power and other voltage dependent load models such as industrial, residential and commercial are considered for this work. The efficiency of the proposed method is tested on 38-node and 69-node radial distribution systems.