Abstract
The work proposed in this paper focuses on providing an effective solution to the shortage of power in rural areas with an effective technique implemented in an economically feasible way. The traditional inverters used for either residential or commercial purposes consume electrical energy from the grid to fulfill the charging and discharging of the battery, which may lead to overloading. The shortcomings of the traditional inverters such as the nonrenewable nature of power sources increased cost of manufacturing, and multistage conversion complexity is considered by the researchers for improvement. As a result, an attempt has been made to provide a cost-effective renewable energy system with a single-stage topology for ac power applications. Single-stage power conversion with an allowed shoot through the state is used here to avoid additional components and reduce the switching losses. Unlike the traditional inverters, the quasi-impedance source inverter (QZSI) that is brought forward can be utilized as a standalone system or a capable backup at the time of power outages. Sinusoidal pulse width modulation (SPWM) is applied to attain reduced harmonics which are measured by observing the harmonic pattern in the total harmonic distortion (THD) curve. The lab results obtained through MATLAB simulation confirm the noteworthy diminution of the THD level in the proposed system compared to the reported one. Usage of photovoltaic (PV) panels to tap energy with reduced stochastic fluctuations due to the high filtering capacity of the proposed circuit, eliminating the need for additional filters, is the uniqueness of this technique.
Highlights
Solar power is mostly preferred due to ease in application compared to other forms of green energy
The proposed work is extracted from the research works related to Grid connected PV systems, Impedance Source Inverters (ZSIs), PWM techniques and Quasi-Impedance Source Inverter (QZSIs)
FOR RL load condition, the results show that the Total Harmonic Distortion (THD) of line current reduces from a level of 14.01% to 3.81%
Summary
Solar power is mostly preferred due to ease in application compared to other forms of green energy. In order to balance the fluctuations in solar power, energy can be stored in a storage device such as battery, to supply the load demand during critical situations (Vinnikov and Roasto (2010); Barrade et al (2012)). The sizing of batteries for different energy forms was discussed in the same year (Santhoshi et al (2014)). In 2014, usage of SHEPWM was explained and verified with the results It proved to have lesser harmonics compared to previous topologies (Kadri et al (2010)). In 2015, for various load conditions, an analysis of the impedance source inverter was done (Kavya Santhoshi and Sudharsan (2015)). Sinusoidal pulse width modulation is applied for controlling the switches of the inverter switches to mitigate harmonics to a greater extent
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