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| Content Provider | IET Digital Library |
|---|---|
| Author | Wang, Jianfeng Xu, Fang Pan, Guobing Ouyang, Kang Jin, Yujia Jin, Libin Qiu, Jing |
| Abstract | This study presents an improved double closed-loop current (fundamental and harmonics current) control method for inductive-capacitive-inductive (LCL) type shunt active power filter (SAPF), which is designed to enhance the robustness of the SAPF system to adapt weak grid application condition. Due to the variation of weak grid impedance, fundamental current control loop based on grid current feedback control method may become unstable, a robust parameters design method in discrete z-domain according to amplitude-frequency and phase-frequency characteristics is proposed to fit the grid impedance variation. The harmonics current of non-linear load exists in a wide frequency range, normal resonant controller will cause the system unstable due to the negative −180° cross of phase at high-frequency range, a digital phase-lead resonant controller (PL-RC) is proposed to extend the bandwidth of the harmonics current control, then the quantities of the PL-RCs used to suppress harmonics can be increased considerably compared with normal resonant controller. Experimental results are presented to verify the effectiveness of the robust parameters design method and the proposed PL-RC. |
| Starting Page | 2120 |
| Ending Page | 2128 |
| Page Count | 9 |
| ISSN | 17518687 |
| Volume Number | 14 |
| e-ISSN | 17518695 |
| Issue Number | Issue 11, Jun (2020) |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/iet-gtd/14/11 |
| Alternate Webpage(s) | https://digital-library.theiet.org/content/journals/10.1049/iet-gtd.2019.1381 |
| Journal | IET Generation, Transmission & Distribution |
| Publisher Date | 2020-02-18 |
| Access Restriction | Open |
| Rights Holder | © The Institution of Engineering and Technology |
| Subject Keyword | Active Filter Amplitude-frequency Closed Loop System Closed-loop Current Control of Electric Power System Current Control Digital Phase-lead Resonant Controller Electric Current Control Feedback Fundamental Current Control Loop Grid Current Feedback Control Method Grid Impedance Variation Harmonics Harmonics Current Control High-frequency Range Inductive-capacitive-inductive Type LCL-type Shunt Active Power Filter Normal Resonant Controller Other Power Apparatus And Electric Machine Phase-frequency Characteristic Power Filter Power Grid Power Harmonic Filter Power Supply Quality Robust Control Robust Control Method Robust Parameter Design Method SAPF System Stability in Control Theory System Unstable Weak Grid Application Condition Weak Grid Condition Weak Grid Impedance Wide Frequency Range |
| Content Type | Text |
| Resource Type | Article |
| Subject | Control and Systems Engineering Energy Engineering and Power Technology Electrical and Electronic Engineering |
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