This paper presents dynamic models of distributed generators (DG) and investigates dynamic behaviour of the DG units within a microgrid system. The DG units include micro turbine, fuel cell and the electronically interfaced sources. The voltage source converter is adopted as the electronic interface which is equipped with its controller to maintain stability of the microgrid during small signal...

The continued interest in the use of distributed generation in recent years is leading to the growth in number of distributed generators connected to distribution networks. Steady state voltage rise resulting from the connection of these generators can be a major obstacle to their connection at lower voltage levels. The present electric distribution network is designed to keep the customer volt...

background: 99mtc is a widely used radioisotope in nuclear medicine centers which is obtained by elution from mo-99/tc-99m generators. usually the generators are either supplied by the iran atomic energy agency or by private companies from foreign countries. in this study we have measured 99mo contamination in 99mtc elute from different generators in a period of one year. materials and methods:...

Increasing the unplanned penetration of Distributed Generators (DGs) has spurred active and reactive power losses in distribution system. This article suggests using a novel Strawberry Plant Propagation Algorithm (SPPA) for planning placement DGs with aim reducing network (active) improving overall voltage profile. The proposed method been tested on 33 69 node radial systems MATLAB. A cost anal...

The energy crisis and environmental concerns have accelerated the development of active distribution network (ADN) with a high proportion renewable energy, which poses challenge to operation power system. Moreover, using management means promote consumption is an important task ADN. Therefore, as means, reconfiguration used enhance adjustable capacity system at planning stage. Firstly, “wind–li...

Synchronization has gained attention in science recently. In electrical engineering, a power network requires generators and loads to be in synchronization. The increase in distributed dc power sources without sophisticated controls has made synchronization more difficult. This paper proposes a synchronous inverter designed for linking distributed power sources within a power network. The linka...