Simulation of microgrid energy market operation
Microgrids constitute low voltage distribution systems that combine dispensed electricity sources (micro-turbines, fuel cells and photovoltaics) with energy storage devices (batteries, capacitors) and controllable loads. These energy systems can promote the use of renewable energy sources and other micro-sources for reducing greenhouse gas emissions, while optimising the reliability of electricity supply. Despite the benefits, the penetration of microgrids on a larger scale requires the effective control of power systems operation to manage a large number of small-scale generators. Through a decentralised control, the microgrids operation creates local short-term energy markets, which need to be economically and technically viable. In order to achieve the maximum benefit of having such a market, operational costs have to be minimal. Addressing this need, researchers introduced the idea of an automatic, micro-grid central controller (MGCC) acting as a market and system operator at the same time. On the basis of price information provided by all local controllers, the MGCC determines the optimal operation of microgrids considering various parameters. These include system and thermal limits, as well as, the optimal balance between supply and demand. A realised simulation tool allows verification and demonstration of the technical viability of this concept of a closed-loop price-signal based short-term energy market operation. Thereby, any disturbance in the system load can be handled by taking into account the economic efficiency and the system limits. For further information click at: http://microgrids.power.ece.ntua.gr
