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| Content Provider | IET Digital Library |
|---|---|
| Author | Jose, Khadijat Joseph, Tibin Liang, Jun Loo, Carlos Ernesto Ugalde |
| Abstract | 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. |
| Starting Page | 1444 |
| Ending Page | 1452 |
| Page Count | 9 |
| ISSN | 17521416 |
| Volume Number | 12 |
| e-ISSN | 17521424 |
| Issue Number | Issue 13, Oct (2018) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-rpg/12/13 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-rpg.2018.5485 |
| Journal | IET Renewable Power Generation |
| Publisher Date | 2018-07-11 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | AC System ADC Scheme Auxiliary Dead-band Controller Control of Electric Power System D.C. Transmission Dead-band Set-point Fast Frequency Controller Fast Frequency Support Frequency Change Rate Measurement Frequency Control Frequency Deviation Rate Measurement HVDC Power Converter Load Flow Multiterminal High-voltage Direct-current Grid Multiterminal HVDC Grid Offshore Installations Offshore Wind Farm Power Generation Control Power Grid Power Imbalance Power System Control Power System Stability Reduced Power Transfers Simultaneous Frequency Oscillations Small-signal Stability Analysis Stability in Control Theory Supplementary Control Algorithm Synthetic Inertia Contribution Undesirable Power Flows Wind Power Plant |
| Content Type | Text |
| Resource Type | Article |
| Subject | Renewable Energy, Sustainability and the Environment |
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