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| Content Provider | IET Digital Library |
|---|---|
| Author | Yang, Renxin Zhang, Chen Cai, Xu Shi, Gang |
| Abstract | This study provides a novel control method for voltage source converter high-voltage direct current (VSC-HVDC) systems with two salient features: autonomous grid-synchronisation without phase-locked loop and real-time grid frequency mirroring capability. The first feature is realised using a newly proposed control method for receiving end converter (REC) called inertial synchronising control (ISC). This method innovatively adopts the physical inertia of DC capacitors to directly synchronise with the grid, without emulating the motional equation of a synchronous generator (SG) as virtual SG control. Hence, less control loops and easy parameter tuning are achieved. The control robustness to grid impedance variation is also improved. Moreover, the second feature is realised with the merit of ISC. Owing to the fast grid-synchronisation capability of ISC, grid frequency dynamic is bound with DC voltage dynamic intrinsically; hence, the instantaneous grid frequency information can be obtained by measuring the local DC voltage of sending end converter, whereby wind turbines can proceed with inertial and frequency response. Consequently, REC is similar to SG in terms of electromechanical characteristics. The effectiveness of the proposed method is evaluated by comparing it to an existing method in PSCAD/EMTDC, and its performance on the robustness to grid impedance variation is addressed. |
| Starting Page | 1572 |
| Ending Page | 1580 |
| 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.2017.0824 |
| Journal | IET Renewable Power Generation |
| Publisher Date | 2018-04-24 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Autonomous Grid-synchronisation Autonomous Grid-synchronising Control Control of Electric Power System Control Robustness Control System Analysis DC Capacitor DC Voltage Dynamic Electromechanical Characteristic EMTDC Fast Grid-synchronisation Capability Frequency Response Grid Frequency Dynamic Grid Impedance Variation HVDC Power Converter Inertial Response Inertial Synchronising Control Instantaneous Grid Frequency Information ISC Physical Inertia Power Generation Control Power Grid Power System Control PSCAD Real-time Grid Frequency Mirroring Capability REC Receiving End Converter Robust Control Sending End Converter Stability in Control Theory Synchronous Generator Synchronous Machine Synthesis Method Virtual SG Control Voltage Source Converter High-voltage Direct Current System Voltage-source Converter VSC-HVDC System Wind Farm Integration Wind Power Plant Wind Turbine |
| Content Type | Text |
| Resource Type | Article |
| Subject | Renewable Energy, Sustainability and the Environment |
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