Energy Management System Thesis

Energy Management System Thesis-71
Also, the algorithm involves the constant pitch scanning of the foreseen operating range.The mentioned MPPT controller model represents a component of the AC/DC microgrid, suitable for the evaluation of the components interconnection mode.

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When adjusting the output voltage of the solar cells in a variable environment, permanent maximum power generation becomes a problem.

Under these conditions, tracking the maximum power point for existing photovoltaic systems increases the efficiency in power generation [9].

The MPPT algorithm was implemented by measuring the electrical current for several voltage values at the required time interval.

This method removes any possibility for the system to enter an unstable oscillation mode (sometimes affecting other types of algorithms).

When compared to conventional power systems, the main advantage of microgrids consists of the controllable unit feature.

Microgrids can be operated as a single load, ensuring easy control and compliance to rules and regulations without impacting the reliability and safety of the user’s power supply.The diagram uses the electrical parameters from the technical specification supplied by the producer as well as the parameters suggested by the scientific literature [1, 8].The photovoltaic panel model was then completed by modeling and implementing a maximum power point tracking (MPPT) controller circuit designed for solar power applications.The special operating conditions of the power systems require new solutions in order to ensure the continuity of the power supply.Therefore, the chapter proposes and analyzes the integration of renewable energy sources (RESs) (photovoltaic panels and wind turbines) into a mixed microgrid by using the Lab VIEW software.The microgrid model has been implemented by developing Lab VIEW models for each component: photovoltaic panels, wind turbine, lead-acid batteries, and end users, all based on load curves and characteristics derived from the client’s database.for a photovoltaic panel has been implemented by using the Lab VIEW environment based on Eq. Thus, Figure 3 shows the diagram developed for a Kyocera photovoltaic panel.The MPPT simulator, initialized with the photocell parameters provided by the PV manufacturer, estimates the parameters required for the calculation model, receives from the rest of the microgrid simulator the irradiation and temperature values according to the climatic scenario, and performs a constant coverage scanning in order to determine the maximum power point.For further reducing the scaled range, the simulator starts from the maximum possible value of solar irradiation and reaches the null value of the electric current, calculating the value of generated power for each iteration.Currently, a typical microgrid configuration, Figure 1, consists of an open architecture, including electrical, communication, command, and control components, which allow the users and energy sources interconnection.Thanks to the capability of offering higher levels for power quality and reliability, a large number of users will adopt power supply solutions based on advanced technology and power electronics in order to minimize voltage sags, interruptions and other voltage fluctuations, or other power-quality disturbances.


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