| Pub. Date | : Jan, 2021 |
|---|---|
| Product Name | : The IUP Journal of Electrical and Electronics Engineering |
| Product Type | : Article |
| Product Code | : IJEEE40121 |
| Author Name | : Hareesh Kumar Yada, M S R Murthy |
| Availability | : YES |
| Subject/Domain | : Engineering |
| Download Format | : PDF Format |
| No. of Pages | : 11 |
The paper presents a multifunctional inverter for a three-phase single-stage grid-connected Solar Photo-Voltaic System (SPV) system with Enhanced Phase Locked Loop (EPLL)-based control algorithm. The EPLL-based Quadrature Signal Generation (QSG) estimates the magnitude of source voltage and load current signal and Phase-Locked Loop (PLL) estimates phase angle of the grid voltage. This estimation is used to design a proper controlled algorithm which improves the power quality such as reactive power compensation, harmonic rejection and DC offset rejection, in addition to feeding the SPV energy to load and grid. Perturb and Observe (P&O)-based Maximum Power Point Tracking (MPPT) is used to estimate the reference PV voltage signal and power. The EPLL-based controller tracks the signal even under distorted grid supply conditions such as voltage sag/swell and harmonics to improve the dynamic response. These multifunctional capabilities of the inverter make the system more efficient for feeding the SPV energy to grid. Various operating conditions are shown to validate the proposed controlled algorithm using MATLAB/Simulink.
Conventional energy sources are exhausting rapidly due to wide increase in energy demand and hence dependency on Renewable Energy Sources (RES) is increasing. International Energy Agency (IEA) is expecting an increase in the share of RES from 23% to 25% from 2013 to 2021 (International Energy Agency, 2016). In this regard, the Solar Photo-Voltaic (SPV) energy is found feasible and cost-effective for producing alternate energy and rooftop PV systems are more attractive because of huge reduction of land cost.
Power Quality (PQ), Phase-Locked Loop (PLL), Enhanced PLL (EPLL), Solar Photo-Voltaic System (SPV)