A comparative review of phase locked loop systems for microgrids applications considering multiple VSC-based distributed generators

García-Ceballos, C.; Flórez, Juan José Mora; Pérez-Londoño, Sandra

doi:10.1109/fisecigre48012.2019.8985008

Cited by 2 publications

(1 citation statement)

References 7 publications

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“…To broaden the application scope of PLL, further research is necessary for a phase-locked scheme that can accurately capture phase information under different grid conditions. Some comparative studies of PLL are included in [14].…”

Section: Introductionmentioning

confidence: 99%

An Improved Dual Second-Order Generalized Integrator Phased-Locked Loop Strategy for an Inverter of Flexible High-Voltage Direct Current Transmission Systems under Nonideal Grid Conditions

Peng,

Fu,

Xiao

et al. 2023

Processes

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High-voltage flexible power systems, with their intrinsic characteristics, play an increasingly important role in electronic power systems. Synchronization between the inverter and the grid needs to be achieved by a phase-locked loop (PLL), the performance of which determines the quality of power transmission. This paper proposes a PLL adapted to extremely harsh grid conditions. Firstly, the traditional synchronous reference frame PLL and the dual second-order generalized integrator (DSOGI-PLL) are analyzed, and the errors in phase-locking and the shortcomings of these two methods in the presence of DC components in the grid are pointed out. Secondly, based on the harmonic grid voltage, a repetitive control internal model is introduced by DSOGI to realize the real-time tracking and regulation of the harmonic signals in order to suppress the harmonic voltage disturbance. In addition, a DC bias elimination and frequency adaptive method is proposed to solve the problems of DC bias and grid voltage frequency fluctuation in order to achieve adaptive tracking of the grid phase. Finally, the superiority of the proposed strategy is verified through simulations and experiments.

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Section: Introductionmentioning

confidence: 99%

An Improved Dual Second-Order Generalized Integrator Phased-Locked Loop Strategy for an Inverter of Flexible High-Voltage Direct Current Transmission Systems under Nonideal Grid Conditions

Peng,

Fu,

Xiao

et al. 2023

Processes

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A grid connection photovoltaic inverter with volt‐VAR control and reactive power support for voltage regulation

Júnior,

de Moura Carvalho,

Rodrigues

et al. 2024

Circuit Theory & Apps

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SummaryThis paper presents the development of a single‐phase voltage source inverter (VSI) of 3.5KW, applied to grid‐connected photovoltaic systems (GCPS). The proposed system has a boost interface converter connected to a full bridge inverter with an LCL filter. Each block that constitutes the proposed GCPS is described in detail, containing the specifications of the solar modules, the design of the power circuit components, the mathematical modeling, and the control design of the converters. The presentation of the Volt‐VAR Control (VVC) highlights the contribution of this work, where it is implemented with the intention of the inverter to supply/consume reactive power, in order to minimize voltage variations at the point of common coupling (PCC). To validate the inverter operation with VVC, three cases are presented, encompassing grid voltage and irradiance variations, and load steps. Through the PCC voltage profiles, currents, and power supplied/consumed, the means to demonstrate the effectiveness of the proposed control is shown. The results obtained through the PSIM simulations and verified by Typhoon Hardware in the Loop (HIL) model, showed the regulation of grid voltage levels for all established conditions.

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A comparative review of phase locked loop systems for microgrids applications considering multiple VSC-based distributed generators

Cited by 2 publications

References 7 publications

An Improved Dual Second-Order Generalized Integrator Phased-Locked Loop Strategy for an Inverter of Flexible High-Voltage Direct Current Transmission Systems under Nonideal Grid Conditions

An Improved Dual Second-Order Generalized Integrator Phased-Locked Loop Strategy for an Inverter of Flexible High-Voltage Direct Current Transmission Systems under Nonideal Grid Conditions

A grid connection photovoltaic inverter with volt‐VAR control and reactive power support for voltage regulation

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