Abstrakt

Synchronous Reference Frame Based Control of Switched Boost Inverter for Stand-Alone Dc Applications Using Genetic Algorithm

K.Vinoth kumar, R.Azhagumurugan

This project proposes the use of Switched boost inverter (SBI) which is a single-stage power converter derived from Inverse Watkins Johnson topology. Unlike the traditional buck-type voltage source inverter (VSI), the SBI can produce an ac output voltage that is either greater or less than the available dc input voltage. Also, the SBI exhibits better electromagnetic interference noise immunity when compared to the VSI, which enables compact design of the power converter. Another advantage of SBI is that it can supply both dc and ac loads simultaneously from a single dc input. These features make the SBI suitable for dc grid applications. In this paper, the SBI is proposed as a power electronic interface in dc grid. The structure and advantages of the proposed SBI-based grid are discussed in detail. This paper also presents a Genetic algorithm based PWM module, which reduces the harmonics in the output voltage. This paper also presents an overview of dq synchronous referenceframe- based controller for SBI, which regulates both dc and ac bus voltages of the nanogrid to their respective reference values under steady state as well as under dynamic load variation in the grid. Index Terms—Switched boost inverter, GA based PWM.