Coordination control strategy for LLCL-filter based grid-tied inverter with indirect sliding mode power control and virtual impedance

Lizhen Wu; Tengfei Liu; Xiaohong Hao

Coordination control strategy for LLCL-filter based grid-tied inverter with indirect sliding mode power control and virtual impedance

View Fulltext

Author(s): Lizhen Wu^{1, 2} ; Tengfei Liu¹ ; Xiaohong Hao³
- Affiliations: 1: College of Electrical and Information Engineering, Lanzhou University of Technology , Lanzhou , People's Republic of China ;
  2: Key Laboratory of Gansu Advanced Control for Industrial Processes , Lanzhou University of Technology , Lanzhou , People's Republic of China ;
  3: National Demonstration Center for Experimental Electrical and Control Engineering Education , Lanzhou University of Technology , Lanzhou , People's Republic of China
Source: Volume 2019, Issue 16, March 2019, p. 2804 – 2809
DOI: 10.1049/joe.2018.8506 , Online ISSN 2051-3305

This is an open access article published by the IET under the Creative Commons Attribution -NonCommercial License (http://creativecommons.org/licenses/by-nc/3.0/)

Received 23/08/2018, Accepted 19/09/2018, Published 29/10/2018

The LLCL filter is widely used in grid-tied inverter systems due to its small size, low cost and good attenuation for high-frequency harmonics. However, the LLCL filter resonance phenomenon and the wide range of impedance may compromise the system stability. In order to solve these problems, a coordination control strategy for LLCL-filter-based grid-tied inverter with indirect sliding mode power control and virtual impedance was presented. The LLCL filter design parameter has been carefully adjusted to ensure the system stable operation under a wide range of grid impedance variations. Comparing with the traditional proportional integral control system through simulation experiment, the output current harmonics of grid-tied inverter are analysed. The proposed strategy is feasible with good control accuracy and tracking performance.

References

1. 1)
  - 10. Xu, J, Xie, S, Tang, T.: ‘Active damping-based control for grid-connected LCL-filtered inverter with injected grid current feedback only’, IEEE Trans. Ind. Electron., 2014, 61, (9), pp. 4746–4758.
2. 2)
  - 12. Liu, Y., Wu, W., He, Y., et al: ‘An efficient and robust hybrid damper for LCL- or LLCL-based grid-tied inverter with strong grid-side harmonic voltage effect rejection’, IEEE Trans. Ind. Electron., 2016, 63, (2), pp. 926–936.
3. 3)
  - 19. Huo, Q., Kong, L., Wei, T., et al: ‘A new method for the photovoltaic grid-connected inverter control’. IEEE Int. Conf. on Electric Utility Deregulation and Restructuring and Power Technologies, Nanjing, China, May 2008, pp. 2626–2629.
4. 4)
  - 1. Li, Y., Nejabatkhah, I.: ‘Overview of control, integration and energy management of microgrids’, J. Modern Power Syst. Clean Energy, 2014, 2, (3), pp. 212–222.
5. 5)
  - 4. Huang, M., Wang, X., Loh, C., et al: ‘Design of the LC + trap filter for a current source rectifier’. Proc. 17th European Conf. Power Electronics and Applications, Geneva, Schweiz, September 2015, pp. 1–9.
6. 6)
  - 9. Hu, G., Chen, C., Duan, S.: ‘New active damping strategy for LCL-filter-based grid-connected inverters with harmonics compensation’, J. Power Electron., 2013, 13, (2), pp. 287–295.
7. 7)
  - 16. Wu, W., He, Y., Tang, T., et al: ‘A new design method for the passive damped LCL and LLCL filter-based single-phase grid-tied inverter’, IEEE Trans. Ind. Electron., 2013, 60, (10), pp. 4339–4350.
8. 8)
  - 5. Dannehl, J., Fuchs, W., Thøgersen, B.: ‘PI state space current control of grid-connected PWM converters with LCL filters’, IEEE Trans. Power Electron., 2010, 25, (9), pp. 2320–2330.
9. 9)
  - 14. Azani, H., Massoud, A., Ben-Brahim, L., et al: ‘Multiloop control strategy for grid-interfaced three-phase voltage source inverter with passively damped LLCL-filter’. IET 3rd Renewable Power Generation Conf., Naples, Italy, September 2014, pp. 1–6.
10. 10)
  - 15. Huang, M., Wang, X., Loh, C., et al: ‘Design of LLCL-filter for grid-connected converter to improve stability and robustness’. IEEE Applied Power Electronics Conf. and Exposition, Charlotte, NC, USA, May 2015, pp. 2959–2966.
11. 11)
  - 7. Hemdani, A., Dagbagi, M., Naouar, M., et al: ‘Indirect sliding mode power control for three phase grid connected power converter’, IET Power Electron., 2015, 8, (6), pp. 977–985.
12. 12)
  - 17. Ben Saïd-Romdhane, M., Naouar, W., Belkhodja, S., et al: ‘Simple and systematic LCL, filter design for three-phase grid-connected power converters’, Math. Comput. Simul., 2015, 130, pp. 181–193.
13. 13)
  - 6. Xiao, L., Huang, S., Lu, K.: ‘DC-bus voltage control of grid-connected voltage source converter by using space vector modulated direct power control under unbalanced network conditions’, IET Power Electron., 2013, 6, (5), pp. 925–934.
14. 14)
  - 8. Beres, N, Wang, X, Blaabjerg, F, et al: ‘Optimal design of high-order passive-damped filters for grid-connected applications’, IEEE Trans. Power Electron., 2015, 31, (3), pp. 2083–2098.
15. 15)
  - 11. Alemi, P., Lee, C.: ‘Active damping control of LLCL filters based on virtual resistor for T-type three-level PWM converters’. IEEE Energy Conversion Congress and Exposition, Pittsburgh, PA, USA, September 2014, pp. 2241–2248.
16. 16)
  - 18. Tang, Z., Pei, P., Wen, M., et al: ‘Two novel reaching laws and their use in sliding mode control of EHA’. IEEE Int. Conf. on Information and Automation, Lijiang, China, August 2015, pp. 1441–1446.
17. 17)
  - 13. Wu, X., Dai, P.: ‘An active damping method of virtual resistor in parallel with capacitor’, Trans. China Electro Tech. Soc., 2010, 25, (10), pp. 122–128.
18. 18)
  - 2. Wu, W., He, Y., Blaabjerg, F.: ‘An LLCL power filter for single-phase grid-tied inverter’. IEEE Trans. Power Electron., 2012, 27, (2), pp. 782–789.
19. 19)
  - 3. Sanatkar-Chayjani, M., Monfared, M.: ‘Design of LCL and LLCL filters for single-phase grid connected converters’. IET Power Electron., 2016, 9, (9), pp. 1971–1978.

Login

Not registered yet?

Share

Tools

Login to add to favourites

Key

Coordination control strategy for LLCL-filter based grid-tied inverter with indirect sliding mode power control and virtual impedance

References

Related content