Abstract
The demand for renewable energy to sustain today’s vulnerability towards depleting fossil fuels is a crucial agenda for research. Various inverter topologies have been proposed to convert renewable sources into a usable form. But output THD, additional filtering components at line frequency (leading to bulky circuitry), lower efficiency, etc., are some of the limitations faced in all those topologies. This paper aims to change a voltage source inverter’s traditional behavior, which generates lesser output voltage with higher THD. The paper proposes a closed-loop non-ideal differential boost inverter (DBI) employing a PI controller. The optimization techniques such as, genetic algorithm (GA) and bacterial foraging optimization algorithm (BFOA) are incorporated to accentuate the PI controller’s performance to produce a better response during line and load disturbance conditions with reduced THD. DBI performance is evaluated on a laboratory prototype with different loading conditions. A comparison between the algorithms and the previous topologies from the literature survey has also been provided to validate this research’s claims. This paper’s required simulation study is carried out using MATLAB, and real-time validation is carried out using dSPACE 1104 with sampling time of one $\mu \text{s}$ .
Highlights
Inverters are a great addition to the power electronics world due to their ability to convert DC renewable sources’ energy to AC usable form
The fourth subsection compares the THD results obtained by employing the algorithms and their influence on producing a better output from the differential boost inverter (DBI)
The voltage gain and the THD results so obtained comply with the claims made at the beginning of this research
Summary
Inverters are a great addition to the power electronics world due to their ability to convert DC renewable sources’ energy to AC usable form. G. Arunkumar et al.: Implementation of Optimization-Based PI Controller Tuning for Non-Ideal DBI boost converters can be broadly classified into three categories: (i) single-phase grid-connected battery-super capacitor hybrid energy storage system [1], (ii) active buck-boost full-bridge inverter [2], and (iii) boost-inverter [3]. The use of a differential boost inverter (DBI) is of choice. A DBI topology employs a single-stage power conversion from DC to AC. It uses differential boost converters, which are being controlled by two positive DC biased clamping sinusoidal references which are out of phase-shifted. The possibility of generating higher AC output voltage from a comparatively lower input DC voltage, employing a single power conversion stage, is advantageous
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