With the global increase in awareness about electricity generation from renewable energy resources, lot of focus has been given by utility power providers to the three-phase system of power generation and distribution to support the cause. However,for the majority of the domestic/residentialconsumers with less than 10 kW, single-phase ac supply is the preferred mode of electrical power consumption at the distribution voltage level. Because of this, single-phase grid-forming inverters are incredibly essential in the current scenario to generate and share electrical energy from distributed renewable energy at homes and small communities through the electric grid. With this motivation, a study on different problems regarding single-phase grid forming inverters has been carried out.

In this seminar talk, design of a digital PWM generation module with independent carrier amplitude modulation capability will be discussed. The proposed PWM module allows for direct compensation of disturbances on the dc bus and finds application in dc-ac and dc-dc converters. Apart from that, a computationally efficient harmonic extraction algorithm for single-phase grid-tied systems will be discussed. Compared to FFT, the proposed harmonic extraction algorithm is efficient enough to be easily executed on a microcontroller with constrained resources, thus enabling large scale adoption of the proposed system.