Optimalizace Off-Grid systému z hlediska kvality elektrické energie a její predikce

Abstract

The task of the dissertation thesis is to perform the general characteristics, description and characteristics of the Off-Grid system, the test platform, which was built on the VŠB-TUO premises, the description of the Power Quality parameters (hereinafter PQ parameters) and to carry out the analysis of the qualitative parameters in the Off-Grid system, to find links between PQ parameters and meteorological variables. The next step was to propose a PQ Management (PQM) algorithm that will predict the power quality in the Off-Grid system and then to implement the PQM in the ADSM (Active Demand Side Management) in the Off-Grid system, thereby adjusting the consumption plan to keep PQ parameters within the allowed limits. The basic specifications of the Off-Grid system including physical principles, as well as the types of renewable sources, individual appliances, and the structure of the Off-Grid system are described in theoretic parts. An integral part of the thesis is the definition of individual PQ parameters, their influence on the network and the network‘s components, as an elements of the energy network, the relation of PQ parameters to the legislation, their characteristics and importance. Practical part of thesis describes the measurement of the individual PQ parameters (related to each appliance) in the Off-Grid compared to the fixed installation (TN-network). Here are the individual measured results in graphical representations and there is described, how these measurements were performed. Another practical part is the proposal and the implementation of the PQ Management algorithm into ADSM using artificial intelligence and its verification in the framework of prediction of PQ parameters and the observance of PQ parameters within the allowed limits. In conclusion of this thesis, there are described results of PQ Management implementation into ADSM in the Off-Grid system, the PQ parameters prediction and the ability of the system to adjust the consumption plan to keep the PQ parameters within limits are evaluated. The purpose of this thesis is to explain the general principle of the Off-Grid system, the Power Quality parameters, but the main aim is to describe the way of the PQ parameters prediction, their influence on the electrical network system and to adhere the PQ parameters within allowed limits by the adaptation of consumption plan through ADSM.