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Engineering Review : International journal for publishing of original researches from the aspect of structural analysis, materials and new technologies in the field of mechanical engineering, shipbuilding, fundamental engineering sciences, computer sciences, electrical engin, Vol. 44 No. 2, 2024.

Original scientific paper

https://doi.org/10.30765/er.2470

Study of PLL less DSGTP System using band-pass filter and APC (active power coefficient) control

Saptaparna Basu Roy Chowdhury ; Department of Electrical Engineering, Cooch Behar Government Engineering College, PIN-736170, West Bengal, India *
Atanu Maji ; Department of Electrical Engineering, Cooch Behar Government Engineering College, PIN-736170, West Bengal, India
Sk Rabiul Hossain ; Department of Electrical Engineering, Cooch Behar Government Engineering College, PIN-736170, West Bengal, India
Pritam Kumar Gayen ; Department of Electrical Engineering, Kalyani Government Engineering College, PIN-741235, West Bengal, India

* Corresponding author.

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Abstract

This paper represents a study on a grid-tied photovoltaic (PV) system connected to a non-linear load. The system includes a PV array, a boost converter, a voltage source inverter (VSI), and a coupling inductor for grid connection. The maximum power point tracking (MPPT) mechanism based on Perturb and Observe (P&O) method which is used to control the duty ratio of the boost converter. Synchronization is achieved through a second-order band-pass filter instead of a Phase Locked Loop (PLL). However, the non-linear load causes poor current quality, leading to a high Total Harmonic Distortion (THD) in the grid current, which may affect the sinusoidal nature of the grid current and other connected loads. To address the harmonics problem, an Active Power Coefficient (APC) control technique is implemented to control the PV inverter gate pulse. The proposed model has been simulated in Matlab/Simulink, and system output parameters are analysed graphically. The simulation results indicate that the proposed approach maintains the total harmonic distortion (THD) of the grid current below 5% even in changing weather conditions, which satisfies the IEEE 519 standard.

Keywords

double stage grid tied photovoltaic (DSGTP) system; active power coefficient (APC) control; phase locked loop (PLL); band-pass filter; total harmonic distortion (THD)

Hrčak ID:

320425

URI

https://hrcak.srce.hr/320425

Publication date:

1.9.2024.

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