A Novel Repeat PI Decoupling Control Strategy with Linear Active Disturbance Rejection for a Three-Level Neutral-Point-Clamped Active Power Filter with an LCL Filter
Abstract
:1. Introduction
2. Mathematical Model of APF with an LCL Filter
Analysis of the LCL Filter
3. Current Inner-Loop Controller Design and Analysis
3.1. Design of the Repeat PI Controller
3.2. Design of the LADRC
3.2.1. Design of LESO
3.2.2. Design of LSEF
3.3. Design of the Repeat PI–LADRC
4. Voltage Outer-Loop Design and Analysis
5. Simulation Verification
6. Conclusions
Author Contributions
Funding
Data Availability Statement
Conflicts of Interest
References
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Control Solution | Key Aspect |
---|---|
PI control based on d-q coordinate system | The reference signal is changed from AC to DC |
Repeat and PI compound control | Parallel connection of repeat control and PI to increase the steady-state accuracy |
Fuzzy control | The decoupling control is realized |
Generalized inverse system strategy | The dynamic decoupling of APF is realized |
Feedback linearization theory | The decoupling control of the nonlinear system is realized |
Feedforword decoupling strategy | The instability caused by the approximate decoupling has been solved |
Backstepping method and ADRC | Connection of Backstepping method and ADRC to improve the control accuracy and dynamic response of the system |
RLADRC | Parallel connection of repeat control and LADRC to improve the accuracy of current tracking |
Deadbeat and RLADRC | Deadbeat control and RLADRC are connected by series, and the current coupling is treated as an internal disturbance, which is compensated by LADRC |
PI and LESO | High-performance current decoupling is achieved with the fourth-order LESO |
Parameters | Numerical Value | Parameters | Numerical Value |
---|---|---|---|
Grid voltage | 480 V | DC-side capacitance | 23.5 mF |
Inverter side inductance | 2 mH | Switching frequency | 20 kHz |
Grid-side inductance | 0.1 mH | Maximum compensation current | 150 A |
Filter capacitance | 11 uF | 400 | |
DC-side bus voltage | 1000 V | 1000 | |
Grid frequency | 50 Hz | 3000 | |
40 | 1 |
Load Current | 84 A | 129 A |
---|---|---|
Pre-compensation | 22.36% | 19.25% |
PI control | 5.15% | 4.68% |
repeat PI control | 2.74% | 2.6% |
LADRC control | 3.7% | 3.17% |
repeat PI–LADRC control | 2.09% | 1.69% |
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Gao, Y.; Zhu, L.; Wang, X.; Lv, X.; Wei, H. A Novel Repeat PI Decoupling Control Strategy with Linear Active Disturbance Rejection for a Three-Level Neutral-Point-Clamped Active Power Filter with an LCL Filter. Electronics 2024, 13, 2973. https://doi.org/10.3390/electronics13152973
Gao Y, Zhu L, Wang X, Lv X, Wei H. A Novel Repeat PI Decoupling Control Strategy with Linear Active Disturbance Rejection for a Three-Level Neutral-Point-Clamped Active Power Filter with an LCL Filter. Electronics. 2024; 13(15):2973. https://doi.org/10.3390/electronics13152973
Chicago/Turabian StyleGao, Yifei, Liancheng Zhu, Xiaoyang Wang, Xiaoguo Lv, and Hongshi Wei. 2024. "A Novel Repeat PI Decoupling Control Strategy with Linear Active Disturbance Rejection for a Three-Level Neutral-Point-Clamped Active Power Filter with an LCL Filter" Electronics 13, no. 15: 2973. https://doi.org/10.3390/electronics13152973