Abstract
In this paper, we design a voltage-modulated direct power control (VM-DPC) for a three-phase voltage source inverter (VSI) connected to a weak grid, where the phase-locked loop (PLL) system may make the system unstable if the conventional vector current control (VCC) method is applied. Compared with the conventional VCC method, the main advantage of the proposed VM-DPC method is that the PLL system is eliminated. Moreover, in order to inject the rated real power to the weak grid, the VSI system should generate some certain amount of reactive power as well. An eigenvalues-based analysis shows that the system with the proposed method tracks its desired dynamics in the certain operating range. Both simulation and experimental results match the theoretical expectations closely.
| Original language | English |
|---|---|
| Article number | 8637819 |
| Pages (from-to) | 11383-11395 |
| Number of pages | 13 |
| Journal | IEEE Transactions on Power Electronics |
| Volume | 34 |
| Issue number | 11 |
| DOIs | |
| State | Published - 2019 |
| Externally published | Yes |
Funding
Manuscript received October 12, 2018; revised January 2, 2019; accepted February 1, 2019. Date of publication February 8, 2019; date of current version August 29, 2019. This work was supported by the Reliable Power Electronic-Based Power System (REPEPS) project at the Department of Energy Technology, Aalborg University as a part of the Villum Investigator Program funded by the Villum Foundation. Recommended for publication by Associate Editor H. H.-C. Iu. (Corresponding author: Xiongfei Wang.) Y. Gui was with the Department of Energy Technology, Aalborg University, 9220 Aalborg, Denmark. He is now with the Automation & Control Section, Department of Electronic Systems, Aalborg University, 9220 Aalborg, Denmark (e-mail:,[email protected]).
| Funders | Funder number |
|---|---|
| Villum Fonden |
Keywords
- Stable system
- vector current controller
- voltage source inverter (VSI)
- voltage-modulated direct power control (VM-DPC)
- weak grid
