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The Solid State Transformer (SST) is a revolutionary technology being developed by the authors. It has a tremendous number of features, which include power management, fault management and energy management. Its autonomous and distributed power management capability enables large-scale integration of distributed energy resources (DER) into the power grid. Specifically, it supports AC or DC connected...
In the switching process of microgrid from the state of being intergrated in external grid to the state of island operation, many devices such as energy storage devices, after sudden disturbance changes its running state, in some extreme cases, this change will overcome the device's affordability, requires the using of relay protection device to avoid further damage. The platform of the microgrid...
This paper presents a control strategy for microgrids in smart grid environment. A hierarchical control strategy is developed to ensure stability and to optimize operation of microgrid. Communication, control and advanced metering infrastructure of smart grids are used to facilitate this control strategy. The control strategy incorporates storage device, electric car, various distributed energy resources...
In this paper, the microgrid which is composed of photovoltaic cells, microturbine, storage device and load is researched. On the basis of analysis of the typical structure of microgrid and the operation modes of every microsource, the program of energy management is presented and designed, and its control strategies are researched under the condition of both grid-connected mode and islanding mode...
This paper deals with the voltage and frequency control of an autonomous induction generator (IG). In order to do that, a voltage source inverter (VSI) with a dump load (DL) circuit on its DC side is employed. The IG frequency is controlled by keeping constant the VSI synchronous frequency. For the IG voltage regulation two cascaded regulators are used, which have as reference the line voltage and...
The ever growing connection of different types of Distributed Generation (DG) in electrical distribution networks makes the issue of regulation and co-ordination more stringent. In this paper, an iterative procedure is presented to manage storages and distributed multi-generation devices. The operational optimisation is focused on providing, at minimum overall production cost, electric and thermal...
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