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This paper proposes the outline design of a platform that can be used to implement multiple emulators to replicate the behaviour of different energetic resources, storage systems, loads or electric grids. This platform can be used to test control algorithms of microgrids with different elements connected into it.
This paper concerns to the research project where experimental 600VDC microgrid that simulates industrial assembly line is built. The purpose of the project is to improve efficiency of manufacturing robotic assembly line and to integrate alternative energy sources. As there is hard to find on the market DC/DC MPPT converter that could be tied to 600VDC microgrid, this paper describes the design of...
This paper compares the efficiency of AC and DC microgrids from a new perspective. It studies the effect of adding a battery energy storage on a microgrid efficiency. A new designed Finnish-townhouse building is applied to model the power flow and converter types. Losses related to wirings, converters and dis/charging of the energy storage are calculated in a minute resolution to enhance the accuracy...
The decentralization of control and management in electrical grid is an important evolution to integrate distributed generation into the power grids ensuring power reliability, quality and safety. Microgrids and Multi-Agent Systems are considered the key to apply this evolution. This paper presents a Multi-Agent System architecture (developed in JADE) for Microgrid operation. Furthermore, a rule-based...
Accurate sizing of power reserve (PR) due to inaccurate forecast of both renewable energy sources (RES) and load demand in a microgrid can provide substantial cost reductions. This paper proposes two strategies to dispatch the PR into different power generators. The first one uses only micro gas turbine (MGT). The second one uses MGTs plus PV based active generators (AGs). The latter enables the RES...
The power coordination in DC microgrids has a vital role in enhancing the performance and management of multi generation units. Renewable Energy Sources (RES) are limited to their available power with intermittent nature. Battery-based energy storage sources have limitations in the charging and discharging capabilities to avoid depleting the battery and preserve the State of Charge (SOC) within its...
This paper proposes a fully decentralized control scheme for hybrid AC/DC microgrids. It proportionally shares the loads in a hybrid AC/DC microgrid among its sub-grids. By controlling the interlinking converters as voltage source inverters, the scheme enables the hybrid microgrid to operate with or without AC sources. It is possible to shut down all the power sources in the AC sub-grid to minimize...
This paper discusses the control design for an islanded microgrid in order to ensure acceptable performance in terms of voltage quality and load sharing by focusing on transient conditions. To this aim, state feedback decoupling approach has been applied. Experimental tests have been performed to demonstrate the effectiveness of the proposed approach.
In order to facilitate the further integration of distributed renewable generation into existing power systems, enhanced control schemes for grid-tied power electronic converters are necessary to ensure non-synchronous power sources can provide power and support to the grid. The virtual-synchronous-machine concept proposes the use of control schemes to enable static generators to operate with the...
This paper analyzes the influence of state feedback coupling between the capacitor voltage and inductor current in voltage source inverters (VSI) operating in stand-alone microgrids. A decoupling technique is proposed as an effective measure to enhance the dynamics. Further implementation issues and control structures are also considered. Lab-scale experimental results prove the validity of the approaches.
The predictable increasing adoption of EV by residential users imposes the necessity of Electric Vehicle charging coordination, in order to charge effectively while minimizing the impact on the grid. In this paper, a two-stage distributed coordination algorithm for electric vehicle charging management in a community microgrid is proposed. Each local EV charging controller is taken as an agent, which...
This paper presents a novel robust control design approach for grid-connected voltage-source-inverter with uncertain grid-impedance. The proposed method is based on the fusion of intelligent and robust control theories. The controller is designed to achieve the highest convergence rate of the system for a certain uncertainty range. The control objective is to regulate the real and reactive power injected...
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