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Book ChapterDOI

Control of Micro-grid by Discretized PR Controller Using Tustin Frequency Pre-wrapping Method

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TLDR
In this article, the modified Tustin discretization and Euler Discretization methods are implemented for current controller of the inverter and compared with each other with respect to total harmonic distortion (THD) of the current and voltage signal from the inverters.
Abstract
The Non-Conventional energy sources play a key role in present power markets to meet the electrical energy demand on the grid. These solar modules are connected to the grid through converters for converting the DC to AC power. The quality of the power from these inverters should be good and hence it is required to limit the harmonics from these inverters as much as possible. This can be done with the help of current controller of inverter which controls the quality of the current supplied by the PV Inverter to the grid. One of the most commonly used current controllers is the PI controller. But due to presence of dynamics in the integral term, the PI control has steady-state error in following the sinusoidal reference. Another commonly used current controller is the Proportional Resonant (PR) controller. As most of the controllers are of digital type, the resonant controllers has zero and pole mapping during the conversion of continuous to discrete time domain and hence it is employed in discrete mode. In this work, the modified Tustin discretization and Euler discretization methods are implemented for current controller of the inverter and compared with each other with respect to total harmonic distortion (THD) of the current and voltage signal from the inverter. This work is designed and implemented in MATLAB/Simulink tool.

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Citations
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Journal ArticleDOI

A Novel Cooperative Control Technique for Hybrid AC/DC Smart Microgrid Converters

TL;DR: In this article , a digital IIR filter-based Proportional-Resonant (PR) current controller is proposed to cancel harmonics while achieving high gain at the resonant frequency (grid frequency).
Journal ArticleDOI

A Novel Cooperative Control Technique for Hybrid AC/DC Smart Microgrid Converters

- 01 Jan 2023 - 
TL;DR: In this paper , a digital IIR filter-based Proportional-Resonant (PR) current controller is proposed to cancel harmonics while achieving high gain at the resonant frequency (grid frequency).
References
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Journal ArticleDOI

Control of Power Converters in AC Microgrids

TL;DR: In this paper, a detailed analysis of the main operation modes and control structures for power converters belonging to micro-grids is carried out, focusing mainly on grid-forming, grid-feeding, and grid-supporting configurations.
Journal ArticleDOI

Current control techniques for three-phase voltage-source PWM converters: a survey

TL;DR: Current control techniques for three-phase voltage-source pulsewidth modulated converters, including bang-bang (hysteresis, delta modulation) controllers and predictive controllers with on-line optimization are reviewed.
Journal ArticleDOI

Performance evaluation of 10 MW grid connected solar photovoltaic power plant in India

TL;DR: In this article, the solar PV plant design aspects along with its annual performance is elaborated and various types of power losses (temperature, internal network, power electronics, grid connected etc.) and performance ratio are also calculated.
Journal ArticleDOI

Reactive Power Sharing and Voltage Harmonic Distortion Compensation of Droop Controlled Single Phase Islanded Microgrids

TL;DR: Algorithms with the aim of addressing limitations in islanded operation were proposed and results were presented to show the suitability of the proposed algorithms in achieving reactive power sharing and in improving the voltage harmonic distortion at the point of common coupling (PCC).
Journal ArticleDOI

On the definition of total harmonic distortion and its effect on measurement interpretation

TL;DR: In this article, it is suggested that total harmonic distortion measurements in the context of power systems should always adopt the first definition and never the second definition and the difference between those definitions is stressed out in this letter.
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