Comparative Study Between PI and Resonant Controllers for PV Grid-Connected Inverter

Makhloufi, Salim

doi:10.14257/ijgdc.2014.7.3.13

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2021

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“…From an implementation point of view, a P+R controller requires less computational effort and does not require a grid voltage feedback loop, while achieving the same performance as a PI controller [2]. Due to the amplitude-frequency-selective characteristic, the power line current distortion is lower compared to control systems with PI structure [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Proportional-Resonant Controller Structure with Finite Gain for Three-Phase Grid-Tied Converters

2021

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The paper presents the study of a three-phase system coupling a DC power source to a power grid. This study, based on an FPGA, implements a real-time control system and digital models of the power circuit. The proposed proportional–resonant (P+R) controller with a modified structure was part of the system, which can be used as an alternative controller to traditional ones, e.g., in photovoltaic systems. Due to difficulties in implementing resonant controllers, a P+R with a new structure using a PI controller was elaborated. With an appropriate approach to the generation of phase current patterns, it is possible to set the reactive current and, thus, compensate for the reactive power. The operation of the system for typical operating conditions (e.g., system startup, change in preset load) was characterized and compared with a classical solution using a PI controller.

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Section: Introductionmentioning

confidence: 99%