Systematic Procedure for Mitigating DFIG-SSR Using Phase Imbalance Compensation

Sewdien, Vinay; Preece, Robin; Rueda, José L.; Meijden, Mart A. M. M. van der

doi:10.1109/tste.2021.3104719

Cited by 6 publications

(1 citation statement)

References 30 publications

(33 reference statements)

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“…Practical engineering observations indicate that the stable operational characteristics of DFIGs are influenced by the turbine control parameters and the level of series compensation [14,15]. Large-scale DFIGs are typically connected to the grid via series compensation lines in order to enhance the transmission capacity of the AC system [16]. However, in series compensation lines, the control system of the DFIG interacts with the compensation capacitor, rendering them susceptible to subsynchronous oscillations and potentially causing large-scale off-grid scenarios [17].…”

Section: Introductionmentioning

confidence: 99%

An Algorithm for Calculating the Parameter Selection Area of a Doubly-Fed Induction Generator Based on the Guardian Map Method

Wang,

Chen,

Jia

et al. 2024

Mathematics

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Large-scale wind farms incorporating doubly-fed induction generators (DFIGs) are considered a promising direction for modern energy supply systems due to their role in reducing dependence on fossil energy sources. However, the dynamic interactions between DFIGs and AC grids sometimes lead to sub-synchronous oscillation (SSO) that threatens the safe and stable operation of wind power systems. Therefore, it is essential to develop a mathematical model and design an algorithm to quantitatively design the control parameters. Such algorithms are helpful in preventing or mitigating system stability problems coming from wind power connected to the grid and reducing damage to power equipment. The traditional state-space model is mainly established to determine the stable operating point and analyze the influence of parameters on the system operating mode. However, this method does not provide the selection area for the system parameters. To address this shortcoming, this paper introduces a modular state-space model for DFIGs containing series compensation lines and proposes an algorithm for calculating the parameter selection area based on the Guardian map method. First, a detailed modular state-space model based on the virtual synchronous generator (VSG) control is established. The modular model helps to reflect the relationship between state variables and focuses on describing the operating state of DFIGs in wind farms. Second, this paper focuses on the influence of VSG control parameters and compensation capacitance on SSO. It aims to clarify the role of the series compensation level and control parameters on SSO based on VSG control. Then, an algorithm for the parameter selection area based on the Guardian map is proposed and the area of the VSG-controlled DFIG is obtained. Finally, the accuracy and validity of the algorithm are verified by time domain simulation in MATLAB/Simulink and HIL experiment.

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