Symmetrical Pole Placement Method-Based Unity Proportional Gain Resonant and Gain Scheduled Proportional (PR-P) Controller With Harmonic Compensator for Single Phase Grid-Connected PV Inverters

Abstract

In this paper, a symmetrical pole placement Method-based Unity Proportional Gain Resonant and Gain Scheduled Proportional (PR-P) Controller is presented. The proposed PR-P controller resolved the issues that are tracking repeating control input signal with zero steady-state and mitigating of 3rd order harmonic component injected into the grid associated with the use of PI controller for single-phase PV systems. Additionally, the PR-P controller has overcome the drawbacks of frequency detuning in the grid and increase in the magnitude of odd number harmonics in the system that constitute the common concerns in the implementation of conventional PR controller developed as an alternative to PI controller. Moreover, the application of an unprecedented design process based on changing notch filter dynamics with symmetrical pole placement around resonant frequency overcomes the limitations that are essentially complexity and dependency on the precisely modelled system associated with the use of various controllers such as Adaptive, Predictive and Hysteresis in grid connected PV power generation systems. The proposed PR-P controller was validated employing Photovoltaic emulator (PVE) consisting of a DC-DC Buck power converter, a maximum power point tracking (MPPT) algorithm and a full-bridge grid connected inverter designed using MATLAB/Simulink system platform. Details of the proposed controller, Photovoltaic emulator (PVE) simulations, analysis and test results were presented in the paper.

Innovative application of new media in visual communication design and resistance to innovation

“…Scholars have long been concerned about the design principles such as unity, proportion, complexity, and symmetry ( Wang and Hsu, 2020 ; Yanarates and Zhou, 2021 ; Haapala, 2022 ). According to Liang (2021) , visual communication design is a process that combines technology and visual arts to communicate thoughts and creative ideas.…”

Analysis and Suppression of Voltage Harmonic Distortions of the Single-Phase High Frequency Link Matrix-Type DC–AC Converter

“…The PR controller has gained its popularity and becomes widely used in single-phase systems [22]. And PR controller offers several advantages, such as resolving the computational burden and complexity due to the removal Park transformations, providing great convenience and simplicity to implement [23]. However, the conventional PR controller cannot reject the odd harmonics at the lowfrequency band in the HFL matrix-type DC-AC converter.…”

Coordinated Control of Three Single–Phase BESS Inverters Using Local Measurements to Mitigate Voltage Unbalance

“…where P ref , Q ref are the active and reactive power reference, respectively, and G p (s), G q (s) are the PI controller transfer functions. The reference current is regulated by a proportionalresonant (PR) controller: this term introduces an infinite gain to remove the steady-state error at the resonant frequency of 50 Hz [23], [24]. Notably, when the BESS cannot provide active power due to lack of charge or outages, the inverter can still inject reactive power, thus emulating the operating conditions described in [1], [12].…”