Full-Order Terminal Sliding-Mode Control for Soft Open Point
Abstract
:1. Introduction
- 1.
- The influence of the parameter perturbation in the SOP is not considered completely in the existing controller design.
- 2.
- The uncertainties in the SOP control system cannot be compensated for by the existing control methods such as PI and MPC. Therefore, the PI and MPC controllers cannot satisfy the requirements of power and voltage control precision.
- 3.
- The conventional sliding-mode controller in the SOP control system cannot compensate for the unmatched uncertainties, and the inherent chattering problem may stimulate the unmodeled dynamic of the system.
- 1.
- The precision, rapidness and robustness of the SOP control system are improved by adopting the full-order sliding-mode control method.
- 2.
- On the premise that the anti-disturbance of the SMC is kept, the chattering in the conventional sliding-mode controller is eliminated by the integral-type control law; thus, the smoothed outputs of the controller can be obtained.
2. Preliminary
2.1. Dynamic Model of the SOP
2.2. Proposed Model of the SOP
2.2.1. Outer-Loop Subsystem
2.2.2. Inner-Loop Subsystem
3. Full-Order Sliding-Mode Control for the Rectifier Side
3.1. Voltage Controller Design for the Outer-Loop
3.2. Current Controller Design for the Inner-Loop
4. Full-Order Sliding-Mode Control for the Inverter Side
5. Simulations
5.1. Empirical Research Methodology
5.2. Simulation Results
5.2.1. Start-up Response in the Case of Parameter Perturbation
5.2.2. Load-Adding Response in the Case of External Disturbance
6. Discussion
7. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Acknowledgments
Conflicts of Interest
Abbreviations
SOP | Soft open point |
VSC | Voltage source converter |
AC | Alternating current |
DC | Direct current |
LSM | Linear sliding-mode |
FOTSM | Full-order terminal sliding-mode |
FOSM | Full-order sliding-mode |
PI | Practical proportional-integral |
MPC | Model predictive control |
SMC | Sliding-mode control |
ISMC | Integral sliding-mode control |
DOBSMC | Disturbance observer-based sliding-mode control |
SVPWM | Signals of space vector pulse width modulation |
PLL | Phase look loop |
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Symbol | Mean | Value |
---|---|---|
Grid-phase voltage | 220 V | |
Load-grid-phase voltage | 220 V | |
Voltage frequency | 50 Hz | |
DC-side voltage | 850 V | |
C | DC-side capacitor | 5000 |
Grid resistance | ||
Load-grid resistance | ||
Grid inductances | 20 mH | |
Load-grid inductance | 20 mH |
Control | Outer-Loop Controller | Inner-Loop Controller |
---|---|---|
MPC | PI controller | Model predictive controller |
LSM | ||
FOSM | 15,000 | 15,000, |
Control | Controller |
---|---|
MPC | Model predictive controller |
LSM | |
FOTSM |
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Zhou, M.; Su, H.; Zhou, H.; Wang, L.; Liu, Y.; Yu, H. Full-Order Terminal Sliding-Mode Control for Soft Open Point. Energies 2022, 15, 4999. https://doi.org/10.3390/en15144999
Zhou M, Su H, Zhou H, Wang L, Liu Y, Yu H. Full-Order Terminal Sliding-Mode Control for Soft Open Point. Energies. 2022; 15(14):4999. https://doi.org/10.3390/en15144999
Chicago/Turabian StyleZhou, Minghao, Hongyu Su, Haoyu Zhou, Likun Wang, Yi Liu, and Haofan Yu. 2022. "Full-Order Terminal Sliding-Mode Control for Soft Open Point" Energies 15, no. 14: 4999. https://doi.org/10.3390/en15144999