Load flow and Stable Planning of Radial Distribution Networks using Distributed Generation

Abstract

The distribution networks execute perceptible evolution due to the wide range of load levels in daily routine as compared to transmission networks. In this thesis, it has been tried to discover the possibilities associated with the efficient operation of electric power distribution networks. A systematic load- flow is necessary for proper working as well as control, well- organized planning and cost effective optimization of distribution networks. The objective of this research work is to develop simple and efficient load-flow solution for radial distribution networks assumed to be of balanced nature, which is providing platform for the mechanism involved in the stable planning of distribution networks using distributed generation. In this work, an array based novel searching technique is used to solve the load-flow of radial distribution networks in an iterative method. The proposed technique is used to identify the nodes beyond the branch and hence helpful in calculation of node current and then branch current. Simple equations are used to relate the sending-end voltage, receiving-end voltage and voltage drops in each branch of the distribution system. A computer algorithm is developed to find out the respective parameters considering flat voltage profile by using backward/forward sweep. The angle of the receiving-end voltage is also computed along with the magnitude of the voltage. The comparison of proposed method with the other available methods reported in the literature has been verified on seven radial distribution networks including one practical Indian feeder to show its efficiency. DG technologies developed for the distribution systems, which comprise of conservative as well as non-conservative types of energy sources for the generating power, are procuring thrust and playing leading role in the distribution system by providing substitute for distribution system planning option. The optimal allocation of DG in any distribution network reduces the loss of the system and increases the voltage profile and