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Abstract: The paper presents a Simulink model for a bio-diesel electrical power generator used to supply a farm. Considering that for a farm is too costly to connect to the national power grid, is taken into account electricity production using a diesel generator powered by bio fuel. Most systems of electricity generation using bio-diesel engine works all the time regardless of the rated electrical load. To avoid unnecessary fuel consumption when the electrical load is small was made an adjustment of mechanical power according with the electric load. For this purpose it was used a governor. As electric generator was used a synchronous machine because it can generate voltage with a constant frequency if the rotational speed of the rotor is constant. Electrical load was modeled using electric power consumption data collected from a real farm. Finally, a Simulink/Matlab model was created, which can be useful to engineers to design a real system.
Keywords: bio-diesel, Simulink, synchronous machine, renewable energy.
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I. INTRODUCTION
In the current electricity networks continue changes occur such as: increasing energy consumption, aging networks and continuous emergence of new policies related to environmental protection. Distributed power generation systems are a possible solution for supplying electricity consumers. Mentioned systems are placed close to the user and differ by large central power generation systems by the generation method, transportation and distribution. Among the biggest disadvantages of renewable resources is their intermittent nature. To compensate and to extend the applicability of this type of resources are used with hybrid storage systems (batteries and supercapacitors).
Autonomous micro-power generation networks represent a new approach to the issue by means of an intelligent supply.
When a part of the grid is temporarily disconnected from the main power supply network and is supplied from own energy sources it is named an islanded grid.
Islanding can be of two types: intentional or unintentional. Unintentional islanding is when a disturbance of the grid occurs. Intentional islanding is used for customers in locations where the main power supply network is unreliable.
Electrical generators typically are of three types: synchronous generators, induction generators, and inverterbased systems. Each type has different characteristics which generate specific requirements to connect to the main power network.
Because a synchronous machine generates...