Planning and operation of active radial distribution networks for improved voltage stability and loss reduction

摘要

The impending deregulated environment facing the electric utilities in the twenty first century is both a challenge and an opportunity for a variety of technologies and operating scenarios. Changing regulatory and economic scenarios, energy savings and environmental impacts are providing impetus to the development of an Active Distribution Networks (ADN), which is predicated to play an increasing role in the electric power system in the near future. Connecting Distributed Generator (DG) to a passive distribution network becomes an active distribution network. Distributed Generators effectively reduce the real power losses and improve the voltage profile in Radial Distribution Networks (RDN). This article proposes a novel methodology for finding the optimal size and location for installation of DG so as to minimize total power loss in radial distribution system. DG unit placement and sizing were calculated using fuzzy logic and new analytical method respectively. A detailed performance analysis has been carried out on IEEE 33-bus and IEEE 69-bus radial distribution networks to demonstrate the effectiveness of the proposed methodology. Effect of optimal DG placement on system voltage profile and branch power losses are also computed and reported.