Improved Active Disturbance Rejection Control Strategy for LCL-Type Grid-Connected Inverters Based on the Backstep** Method
Abstract
:1. Introduction
2. Preliminaries and Problem Description
2.1. Test System Description
2.2. Constructing the LCL Inverter State Equation
2.3. Design of Second-Order LESO
2.4. Improved Control Law Design Based on LESO Estimation Error Compensation
2.5. Backstep** Outer-Loop Control Law Design
2.6. Parameter Design
3. Performance Analysis of the BS-LADRC
4. Simulation Verification
4.1. Verifying the Controlled Antidisturbance in Disturbances
4.2. Verifying the Transient Tracking Performance of Current Disturbances
4.3. Verification of Grid-Side Power-Glitch-Suppression Harmonic Performance
4.4. Verification of Grid-Side Voltage Harmonic Distortion Rate’s Abrupt Harmonic Suppression Performance
4.5. Harmonic Suppression Performance of Nonlinear Load Surges in the Power Grid
5. Conclusions
Author Contributions
Funding
Conflicts of Interest
Abbreviations
dw | Unknown perturbation |
e1 | iMd and the error of its estimate |
e2 | fab and the error of its estimate |
E | Real need for compensation |
fab | Total disturbance inside and outside the system |
iLa, iLb, iLc | Three-phase inverter side a, b, c phase current |
iMa, iMb, iMc | Grid-connected side a, b, c phase load current |
iMd, iMq | Grid-side current under the d-axis and q-axis components |
ua, ub, uc | Phase voltage of the inverter circuit from the center of the three bridge arms to the load |
ud, uq | Inverter-side voltage under the d-axis and q-axis components |
uMa, uMb, uMc | Grid-connected side a, b, c phase load voltage |
uMd, uMq | Grid-side voltage under the d-axis and q-axis components |
Udc | DC busbar voltage |
Estimated value of iMd | |
Estimated value of fab | |
δ1 | Error of e1 with its estimated value |
References
- Wang, S.; Lv, Z. Research on repetitive control method in LCL grid connected inverter. Chin. J. Electr. Eng. 2010, 30, 69–75. [Google Scholar]
- Eren, S.; Pahlevaninezhad, M.; Bakhshai, A. Composite Nonlinear Feedback Control and Stability Analysis of a Grid-Connected Voltage Source Inverter with LCL Filter. IEEE Trans. Ind. Electron. 2013, 60, 5059–5074. [Google Scholar] [CrossRef]
- Xu, J.; ** of the LCL Filter for Single-Phase Grid-Connected PV Inverters. Energies 2014, 7, 3934–3954. [Google Scholar] [CrossRef]
- Tang, Y.; Loh, P.C.; Wang, P. Generalized Design of High Performance Shunt Active Power Filter with Output LCL Filter. IEEE Trans. Ind. Electron. 2012, 59, 1443–1452. [Google Scholar] [CrossRef]
- Guo, L.; **, N.; Li, Y.; Dai, L.; Wang, H.; Zhang, K. Model predictive control of grid connected inverter without AC voltage sensor based on sliding mode observer. Power Autom. Equip. 2020, 40, 108–114. [Google Scholar]
- Tan, C.; Chen, Q.; Zhang, L.; Zhou, K. Deadbeat repetitive control of three-phase four leg grid connected inverter. Power Syst. Autom. 2018, 42, 142–148. [Google Scholar]
- Young, H.A.; Marin, V.A.; Pesce, C. Simple Finite-Control-Set Model Predictive Control of Grid-Forming Inverters with LCL Filters. IEEE Access 2020, 8, 81246–81256. [Google Scholar] [CrossRef]
- Dong, R.; Liu, S.; Liang, G.; An, X. Research on Microgrid inverter control method based on model predictive control. Power Syst. Prot. Control 2019, 47, 11–20. [Google Scholar]
- Han, J. From PID technology to “auto disturbance rejection control” technology. Control Eng. 2002, 3, 13–18. [Google Scholar]
- Sun, B.; Gao, Z. A DSP-based active disturbance rejection control design for a 1-kW H-bridge DC-DC power converter. IEEE Trans. Ind. Electron. 2005, 52, 1271–1277. [Google Scholar] [CrossRef] [Green Version]
- Gao, Z. Research on the idea of active disturbance rejection control. Control Theory Appl. 2013, 30, 1498–1510. [Google Scholar]
- Yang, L.; Zeng, J.; Huang, Z. Application of linear active disturbance rejection technology in grid connected current control and active dam** of LCL inverter. Power Grid Technol. 2019, 43, 1378–1386. [Google Scholar]
- Yuan, D.; Ma, X.; Zeng, Q.; Qiu, X. Research on frequency band characteristics and parameter allocation of linear ADRC for second order systems. Control Theory Appl. 2013, 30, 1630–1640. [Google Scholar]
- Yang, L.; Zeng, J.; Ma, W.; Huang, Z. Voltage control of microgrid inverter based on improved second-order linear active disturbance rejection technology. Power Syst. Autom. 2019, 43, 146–153. [Google Scholar]
- Zhou, R.; Han, W.; Tan, W. Applicability and tuning of linear active disturbance rejection control. Control Theory Appl. 2018, 35, 1654–1662. [Google Scholar]
- Han, Y.; Xu, M.; Sun, J.; Sun, Y.; Zhao, L.; Tao, L. Grid connection control of wind power system combining correction link and LADRC. J. Power Syst. Autom. 2020, 32, 120–127. [Google Scholar]
- Fu, C.; Tan, W. Parameter adjustment of linear ADRC based on high order controller design. Control Theory Appl. 2017, 34, 265–272. [Google Scholar]
- Li, Z.; Zeng, J.; Huang, J.; Feng, J.; ** Control of Uncertain Systems. Electron. Opt. Control 2010, 11, 1115–1119. [Google Scholar]
- Zheng, Q.; Richter, H.; Gao, Z. Active Disturbance Rejection Control for Piezoelectric Beam. Asian J. Control 2014, 16, 1612–1622. [Google Scholar] [CrossRef]
- Ma, M.; Liao, P.; Cai, Y.; Lei, E.; He, Y. Active disturbance rejection control strategy of LCL grid connected inverter. High Volt. Technol. 2021, 47, 2223–2231. [Google Scholar]
- Ma, Y.; Zhang, T.; Zhou, X. Improved LADRC control of inverter stage of solid-state transformer based on fuzzy adaptive. J. Power Syst. Autom. 2022, 34, 123–131. [Google Scholar]
Parameters | Value |
---|---|
DC-side voltage Udc/V | 600 |
Power P/kW | 120 |
RMS grid voltage uM/V | 280 |
Resonant frequency f/Hz | 900 |
Inverter-side filter inductor L1/mH | 0.6 |
Switching frequency fsw/kHz | 3.2 |
Grid-side filter inductor L2/mH | 0.3 |
Filter capacitors C/μF | 160 |
Control gain b0 | 625 |
Observer bandwidth ω0 | 1000 |
Controller initial bandwidth ωc | 25 |
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Zhang, Z.; Ding, W. Improved Active Disturbance Rejection Control Strategy for LCL-Type Grid-Connected Inverters Based on the Backstep** Method. Electronics 2022, 11, 2237. https://doi.org/10.3390/electronics11142237
Zhang Z, Ding W. Improved Active Disturbance Rejection Control Strategy for LCL-Type Grid-Connected Inverters Based on the Backstep** Method. Electronics. 2022; 11(14):2237. https://doi.org/10.3390/electronics11142237
Chicago/Turabian StyleZhang, Zhiru, and Wenfang Ding. 2022. "Improved Active Disturbance Rejection Control Strategy for LCL-Type Grid-Connected Inverters Based on the Backstep** Method" Electronics 11, no. 14: 2237. https://doi.org/10.3390/electronics11142237