NUST Micro Grid Planning with New DER Resources and Reliable Infrastructure Modernization /

Abstract

Conventional distribution system of Pakistan lacks robustness, efficiency and reliability due to its radial configuration, increasing load demands, aging infrastructure and unidirectional power flows. To overcome these issues conventional power systems needs to be transformed. Modification of network topology from radial distribution network to interconnected distribution network helps to increase power reliability and security. However, to minimize the loss of power system, distributed generation must be penetrated along the load side. These two strategies can help power system to sustain it liability under contingencies. Random placement of DGs can cause more problems than resolving the existing ones. Intermittent nature of renewable DGs introduces voltage discrepancies while inappropriate DG sizing often results in reverse power flows to the grid. So, for better results and DG placement is required for which 3 types of voltage stability indexes are used. DG siting and their performance is evaluated based on conflicting objectives using three multi criteria decision analysis (MCDA) techniques, WSM, WPM and TOPSIS. These techniques are not only implemented ideal network with load growth but also on actual network with load growth as well. Analysis is also performed to visualize effect of each scenario for better analysis and comprehension of results. Reliability can be increased through interconnection existing radial system and distributed generation minimizes line losses due to extensive power travelling. Simulations are performed on National University of Science and Technology (NUST) distribution network in MATLAB Simulink.