Development of a new automatic voltage regulator for diesel generator sets using two switch three state buck-boost convertor

Diesel generator sets are used worldwide as backup systems or prime systems to provide quality energy when there is no mains power handling loads. As diesel powered generators imitate main power while working the system, should produce constant, clean voltage as much as possible. For every site, loads may vary so it is a technical challenge to provide constant voltage every time the machine works. If the system produces unstable voltage, thus may harm electrical devices. Recent years, the use of an automatic voltage regulator for a constant voltage is promoted to the market. There are different methods to provide constant voltage output as told in previous researches. These methods are discussed along with their advantages and disadvantages. These researches used complex control methods in many mathematical calculations to achieve an acceptable dynamic and transient response that causes the design cost to rise significantly. In this study, a new automatic voltage regulator using two switch tri-state buck-boost convertor is considered. The advantage of this method is that it keeps a constant voltage with international standards; in addition, it shows reasonable dynamic and transient response.