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| Content Provider | IET Digital Library |
|---|---|
| Author | He, Shiming Xiong, Jian Wang, Ze Lin, Shengchao |
| Abstract | Considering the time delay introduced by the digital control, it turns out that capacitor current proportional feedback active damping (AD) is equivalent to a frequency-dependent virtual impedance in parallel with the filter capacitor. Unstable open-loop poles will arise due to the presence of virtual negative resistor, which causes that the system stability is highly sensitive to grid-impedance variation. Therefore, this study proposes a novel capacitor current quasi-integral feedback AD method. Theoretical analysis shows the proposed AD method can extend the region of the virtual positive resistor, i.e. damping region to the half of sampling frequency (f s/2). Hence, strong robustness against the grid-impedance variation is achieved. Finally, experimental results including the proposed AD method as well as capacitor current proportional feedback AD method are given and compared, which validates the superior damping performance of the proposed scheme. |
| Starting Page | 1332 |
| Ending Page | 1342 |
| Page Count | 11 |
| ISSN | 17554535 |
| Volume Number | 13 |
| e-ISSN | 17554543 |
| Issue Number | Issue 7, May (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-pel/13/7 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2019.0659 |
| Journal | IET Power Electronics |
| Publisher Date | 2020-01-23 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Capacitor Current Proportional Feedback Active Damping Capacitor Current Proportional Feedback AD Method Capacitor Current Quasiintegral Feedback Control of Electric Power System Damping Damping Performance Delay Digital Control Distributed Parameter Control System Feedback Filter Capacitor Frequency-dependent Virtual Impedance Grid-impedance Variation Invertors LCL-type Grid-connected Inverter Open-loop Poles Other Power Apparatus And Electric Machine Power Capacitor Power Filter Power Grid Resistor Robust Control Sampling Frequency Stability in Control Theory System Stability Time Delay Virtual Negative Resistor Virtual Positive Resistor |
| Content Type | Text |
| Resource Type | Article |
| Subject | Electrical and Electronic Engineering |
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