Coordination of fast frequency support from multi-terminal HVDC grids

Jose, Khadijat; Adeuyi, Oluwole Daniel; Liang, Jun; Ugalde‐Loo, Carlos E.

doi:10.1109/energycon.2018.8398852

Cited by 4 publications

(4 citation statements)

References 12 publications

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“…This loss in control of dc voltage impacts the OWF active power as well because of the presence of the V dc –f droop. It should be highlighted that the issues here highlighted are still present without an OWF providing fast frequency support [19].…”

Section: Simulations and Resultsmentioning

confidence: 99%

“…1d. It involves a temporary step increase in the power/torque generated from the WT [19,23,24]. When the WTs detect a decline in system frequency, they reduce their speed to release 5-10% extra power from the stored kinetic energy in their rotating shafts.…”

Section: Wts Temporary Overproductionmentioning

confidence: 99%

“…This paper builds on the initial results presented in [19]. The inertial contribution of OWF is considered here in coordination with the frequency support and it changes the system behaviour.…”

Section: Introductionmentioning

confidence: 98%

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Auxiliary dead‐band controller for the coordination of fast frequency support from multi‐terminal HVDC grids and offshore wind farms

Jose

Joseph

Liang

et al. 2018

IET Renewable Power Generation

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High-voltage direct-current (HVDC) grids may provide fast frequency support to ac grids with the aid of supplementary control algorithms and synthetic inertia contribution from offshore wind farms. However, when all converters within the HVDC grid are fitted with these supplementary controllers, undesirable power flows and reduced power transfers may occur during a power imbalance. This is due to simultaneous frequency oscillations on the different ac systems connected to the HVDC grid arising during the support operation. To prevent this adverse effect, an auxiliary dead-band controller (ADC) is proposed in this study. The ADC modifies the dead-band set-point of the fast frequency controllers using measurements of the rate of change of frequency and frequency deviation. A four-terminal HVDC integrated with an offshore wind farm is modelled to analyse and study the effectiveness of three different supplementary fast frequency control algorithms. Results show that the proposed ADC scheme improves the performance of fast frequency control algorithms. For completeness, a small-signal stability analysis is carried out to confirm that a stable system operation is maintained.

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Section: Simulations and Resultsmentioning

confidence: 99%

Section: Wts Temporary Overproductionmentioning

confidence: 99%

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Auxiliary dead‐band controller for the coordination of fast frequency support from multi‐terminal HVDC grids and offshore wind farms

Jose

Joseph

Liang

et al. 2018

IET Renewable Power Generation

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“…An scheme that is activated upon the detection of a significant frequency deviation with a support limit requested from other AC systems interconnected by VSCs is proposed in [23]. An auxiliary dead-band controller for fast-frequency support in MTDC is proposed in [24], which uses measurements of RoCoF and frequency deviation to modify the dead-band set-point of fast-frequency controllers.…”

Section: Introductionmentioning

confidence: 99%

Grid Code-Dependent Frequency Control Optimization in Multi-Terminal DC Networks

et al. 2020

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The increasing deployment of wind power is reducing inertia in power systems. High-voltage direct current (HVDC) technology can help to improve the stability of AC areas in which a frequency response is required. Moreover, multi-terminal DC (MTDC) networks can be optimized to distribute active power to several AC areas by droop control setting schemes that adjust converter control parameters. To this end, in this paper, particle swarm optimization (PSO) is used to improve the primary frequency response in AC areas considering several grid limitations and constraints. The frequency control uses an optimization process that minimizes the frequency nadir and the settling time in the primary frequency response. Secondly, another layer is proposed for the redistribution of active power among several AC areas, if required, without reserving wind power capacity. This method takes advantage of the MTDC topology and considers the grid code limitations at the same time. Two scenarios are defined to provide grid code-compliant frequency control.

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An Adaptive and Efficient VSC-MTDC Controller for DC Voltage Regulation and Frequency Stability in AC Network

Taneja

Saha

Singh

2023

Lecture Notes in Electrical Engineering

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Coordination of fast frequency support from multi-terminal HVDC grids

Cited by 4 publications

References 12 publications

Auxiliary dead‐band controller for the coordination of fast frequency support from multi‐terminal HVDC grids and offshore wind farms

Auxiliary dead‐band controller for the coordination of fast frequency support from multi‐terminal HVDC grids and offshore wind farms

Grid Code-Dependent Frequency Control Optimization in Multi-Terminal DC Networks

An Adaptive and Efficient VSC-MTDC Controller for DC Voltage Regulation and Frequency Stability in AC Network

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