Simulating sustained oscillations and ambient data in a large nonlinear power system model

Marco, Fernando De; Martins, N.; Pellanda, Paulo César; Silva, Aguinaldo S. e

doi:10.1109/pesgm.2017.8274268

Cited by 2 publications

(2 citation statements)

References 8 publications

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“…Previous mechanism analysis has attributed VLFOs to negatively damped governors (Chen et al, 2017), backlash (De Marco et al, 2018) and time delays (Duggan et al, 2021) within governor control systems. Several mitigation measures have been proposed to increase the damping of the VLFOs.…”

Section: Literature Reviewmentioning

confidence: 99%

Active power control from wind farms for damping very low-frequency oscillations

et al. 2022

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Timely remote activation of frequency response, provided by converter-based generation, can improve the damping of very low-frequency (VLF) oscillations. The research presented is based on both power system models and actual data from phasor measurement units (PMU) on the Irish power system. The performance of active power control (APC) is investigated, and variations in wind speed, droop, time lag and resource capacity demonstrate their effectiveness at damping wide-spectrum VLF modes. PMU data that captures the activation and deactivation of APC at wind farms is presented and analyzed; it demonstrates how APC control effectively dampens VLF modes on the Irish system. These observations are supported by sensitivity analysis carried out a power system model in DIgSILENT PowerFactory. These results demonstrate the improvement in VLF mode stability that APC can provide at wind generation. It is demonstrated that minimal amounts of generation curtailment and modest droop settings are sufficient to see substantial VLF mode damping. Index Terms—Active Power Control, Oscillation damping, Very Low-Frequency Oscillations, PMU.

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Section: Literature Reviewmentioning

confidence: 99%

Active power control from wind farms for damping very low-frequency oscillations

et al. 2022

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“…Modelling VLFOs for simulation-based studies, small signal stability analysis [3] and time-domain nonlinear analysis [19] are commonly used. Reference [20] used a transport delay for simulating oscillations on a steambased governor but for oscillation frequencies greater than 0.1 Hz.…”

Section: B Literature Reviewmentioning

confidence: 99%

Synchronisation Control Action for Very Low-Frequency Oscillations

Duggan

Brogan

Liu

et al. 2021

2021 32nd Irish Signals and Systems Conference (ISSC)

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Very low-frequency oscillations have been occurring on power grids with a high concentration of hydro generation and islanded grids with a lack of AC interconnection. These oscillations can persist in an ambient form or be triggered by a transient event before growing to the extent that threatens system stability. When a severe event occurs, it is important to identify the cause and have practical control actions to restore power system stability. Firstly, this paper demonstrates that synchronising a generator with a positive damping torque component can restore positively damped conditions. Simulations on a modified 2-Area system are evaluated with DIgSILENT PowerFactory. A transport delay is added to speed feedback of a GAST model governor to simulate a spontaneous negatively damped very-low-frequency oscillation with the appearance of being self-excited after a generation load imbalance. Secondly, a 300 mHz 0.08 Hz very-low-frequency oscillation on the Irish electrical grid is analysed using the governor based distributed energy flow method. Dissipating energy flow is used to illustrate how the synchronisation of 2 generators successfully returned the Irish power system to positively damped conditions.

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Simulating sustained oscillations and ambient data in a large nonlinear power system model

Cited by 2 publications

References 8 publications

Active power control from wind farms for damping very low-frequency oscillations

Active power control from wind farms for damping very low-frequency oscillations

Synchronisation Control Action for Very Low-Frequency Oscillations

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