الفهرس 
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Abstract
This thesis is devoted to simulation and experimental modeling of inverter triggering circuits using a zero-crossing detector (ZCD) based on a microcontroller. The purpose of this circuit is to achieve the synchronization of photovoltaic power systems (PV) and diesel generators. ZCD is one type of synchronization method and is used to detect the zero-cross of AC sine wave. ZCD circuit facilitates the integration of PV power systems with other systems. A small signal (an impulse) is generated by the ZCD circuit when the AC sine wave crosses zero. The impulse generated by the ZCD circuit has a bad effect on the working of other circuits. The width of this impulse is dependent on the elements used. Two complementary SPWM signals are generated with Arduino Meg2560 when receiving a signal from the ZCD circuit. These two complementary triggering pulses are generated for triggering the switches of a single-phase inverter. TLP250 is used as a gate driver for this inverter. IGBTs were chosen for the inverter circuits because they can withstand high currents and their ability to open and close at high frequencies. The proposed design can be a good choice to allow connection for different sources for certain loads. Such as in the case of isolated load or microgrid feed by different distributed generators, such as synchronous generator (diesel) and PV, etc. There is a big challenge to choose the high-quality elements to generate the accurate pulse which led to higher performance of the used system. So this thesis will study two elements. Transistor 2N3904 and optocoupler 4N27 are examined within the system. The results obtained from the different designs are compared and analyzed to choose the suitable one. The whole proposed system is simulated based on Proteus software and the corresponding result is clearly depicted with detailed analysis, and compared with an experimental prototype which is accurately created. It is found that there is a good agreement between the simulation and the experimental results, which inform the quality of the designed system.