7.6 Distributed energy production
In the smart grid the used electricity does not come only from a classical nuclear or coal plants or from a bit modern centralized wind mill or solar power farms. The electricity comes from every house, factory, plant or farm that is connected to the energy grid. This kind of totally distributed energy production show what can be achieved using the smart grids, although the system itself is difficult to produce. Still there are some research reports that take the possibility to sell the extra power produced to the global energy grid into consideration [20, 23] and there is also Finnish researchers trying to find out a functional solution to this problem [2, 3, 4].
In this work an approach of the two directional energy flows was not really considered more than the level of a possible idea mainly because the energy production at home is not that usual, at least at the moment, and because it would have required creating the agents for more complex tasks than they were designed. Still, when considering the next version of this system a distributed energy production is one important part that should be taken into consideration as it takes the whole energy market to a whole new level where anyone can be a producer.
Of course, the problem itself is quite complex, as it is not enough just to measure the power consumption and the production of a house, for example, but the system should be able to transfer the extra power from the production facilities to the global grid and to measure the amount of the transferred power so it can be billed properly. At the same time the system should switch of incoming connection from the global grid and use only the locally created power monitoring the power levels all the time, so no blackouts would occur.
44 7.7 Client connection
The client connection was ruled out from this work, but when considering the future of the system it is important to think also this aspect of the system. Currently people have access to a huge amount of information from where ever they are, but still a proper application for monitoring the personal energy consumption is missing in most cases. In Finland power companies provide the temporal information about the power consumption for clients, but they do not provide the current consumption, the forecast or the changes in the earlier data. This kind of data is valuable for customer who wants to change the structure of daily consumption or to shift the peak consumption.
For these reasons it would be reasonable to create a client application that could interact with the main system and get the client specific data out of the system. All necessary information is located in the main database so only the interface is missing. The client application could follow the scheme presented in Figure 17.
Figure 17. Customer connections.
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8 CONCLUSION
In this thesis a structure for a smart grid control system using a multi-agent approach was presented. In the thesis was also considered the functionality of the control system and how to achieve this functionality. For the functionality some theory and existing implementations were presented to see how the selected methods support the goal of the thesis.
As the control system was not finished at the same time with the thesis in Chapter 7 the future of the system was considered. In this chapter was discussed what will be done and why. How to achieve the ultimate goal of the fully functional system set by the Russian university SPBSTU. These subjects were well considered in Chapter 7 and also some ideas outside the given goal were presented to improve the smart grid solution and to achieve the full potential of the system.
In all, the thesis was finished on time and the content was what it was planned to be, although the time table was tight and some small changes happened on the way.
Nevertheless this part of the work was finished and the presented multi-agent system can also be used in many different kinds of systems and not only in the presented smart gird.
46
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