Techno-Economic planning framework of three phase unbalanced distribution system using multiple DG and Capacitor

摘要

Distribution systems across many parts of the globe have the problem of high system loss, high voltage unbalance and poor maintenance of system voltage profile. The major aim in allocating Distributed Generation (DG) and Shunt Capacitor is to reduce line loss, decrease voltage unbalance and to maintain the voltage profile in the practical unbalanced distribution system. In this paper DG and Shunt Capacitor are injected at identified weak bus and performance in terms of technical and economic parameters are analyzed. Voltage profile, system loss and voltage unbalance are the technical parameters selected for judging the system parameters by incorporation of the device. Net present value (NPV) is chosen as the financial indicator in this paper which is used to judge the economic performance. Instead of random allocation, DG and capacitors are injected at the selected weak bus to enhance the system performance. To validate the proposed methodology IEEE 13 bus unbalances network is chosen. The system performance is analyzed both for normal load and heavy load condition. Open Distribution system simulator software (Open DSS) which is primarily used for electric power utility distribution network is used for three phase unbalanced power flow analysis of the network. Result of the work validates the effectiveness of this approach