access icon free A novel hierarchical control strategy combined with sliding mode control and consensus control for islanded micro-grid

In order to improve the control effect on voltage and frequency of each distributed energy resource (DER) and improve the stability of the islanded micro-grid, a novel hierarchical control strategy combined sliding mode control (SMC) and consensus control is proposed in this study. The control structure is divided into two layers: the physical layer and the cyber layer. In the physical layer, in order to improve the dynamic control effect, an improved droop control based on consensus theory with considering packet loss is proposed in this study. And the control can be completed in finite time by selecting the approximate parameters in the controller; in order to improve the stability of voltage loop and current loop, an improved double closed-loop structure based on the SMC is proposed. Moreover, the control can also be completed in the finite time. In the cyber layer, an event-triggered SMC-virtual leader–following consensus protocol is proposed in this study to solve the problem of channel noise (disturbance). For improving the control effect, the protocol is used to complete the secondary control on voltage and frequency of each DER. Finally, the effectiveness of the novel control strategy is verified by simulation results.

Inspec keywords: frequency control; power system stability; distributed power generation; closed loop systems; power generation control; voltage control; power distribution control; power distribution faults; variable structure systems

Other keywords: improved double closed-loop structure; DER; current loop stability; distributed energy resource; voltage loop stability; consensus control theory; stability; event-triggered SMC-virtual leader–following consensus protocol; sliding mode control; hierarchical control strategy; islanded microgrid; frequency control; improved droop control; SMC; voltage control

Subjects: Distribution networks; Distributed power generation; Multivariable control systems; Stability in control theory; Power system control; Frequency control; Control of electric power systems

References

    1. 1)
      • 6. Dou, C.X., Lv, M.F., Zhao, T.Y., et al: ‘Decentralised coordinated control of microgrid based on multi-agent system’, IET Gener. Transm. Distrib., 2015, 9, (16), pp. 24742484.
    2. 2)
      • 9. Meng, L., Zhao, X., Tang, F., et al: ‘Distributed voltage unbalance compensation in islanded microgrids by using a dynamic consensus algorithm’, IEEE Trans. Power Electron., 2016, 31, (1), pp. 827838.
    3. 3)
      • 10. Bidram, A., Davoudi, A.: ‘Hierarchical structure of microgrids control system’, IEEE Trans. Smart Grid, 2012, 3, (4), pp. 19631976.
    4. 4)
      • 15. Dou, C.X., Zhang, Z.Q., Yue, D., et al: ‘Improved droop control based on virtual impedance and virtual power source in low-voltage microgrid’, IET Gener. Transm. Distrib., 2017, 11, (4), pp. 10461054.
    5. 5)
      • 18. Yu, X., She, X., Ni, X., et al: ‘System integration and hierarchical power management strategy for a solid-state transformer interfaced microgrid system’, IEEE Trans. Power Electron., 2014, 29, (8), pp. 44144425.
    6. 6)
      • 20. Ahumada, C., Cárdenas, R., Sáez, D., et al: ‘Secondary control strategies for frequency restoration in islanded microgrids with consideration of communication delays’, IEEE Trans. Smart Grid, 2016, 7, (3), pp. 14301441.
    7. 7)
      • 14. Vahidreza, N., Ali, D., Frank, L., et al: ‘Distributed adaptive droop control for DC distribution systems’, IEEE Trans. Energy Convers., 2014, 29, (4), pp. 944956.
    8. 8)
      • 4. Guerrero, J.M., Chandorkar, M., Lee, T., et al: ‘Advanced control architectures for intelligent microgrids – part I: decentralized and hierarchical control’, IEEE Trans. Ind. Electron., 2013, 60, (4), pp. 12541262.
    9. 9)
      • 13. Lu, X.Q., Yu, X.H., Lai, J.Q., et al: ‘A novel distributed secondary coordination control approach for islanded microgrids’, IEEE Trans. Smart Grid, 2017, early access, DOI: 10.1109/TSG.2016.2618120.
    10. 10)
      • 2. Palensky, P., Dietrich, D.: ‘Demand side management: demand response, intelligent energy systems, and smart loads’, IEEE Trans. Ind. Inf., 2011, 7, (3), pp. 381388.
    11. 11)
      • 19. Bidram, A., Davoudi, A., Lewis, F.L., et al: ‘Secondary control of microgrids based on distributed cooperative control of multi-agent systems’, IET Gener. Transm. Distrib., 2013, 7, (8), pp. 822831.
    12. 12)
      • 5. Guerrero, J.M., Chandorkar, M., Lee, T., et al: ‘Advanced control architectures for intelligent microgrids – part II: power quality, energy storage, and AC/DC microgrids’, IEEE Trans. Ind. Electron., 2013, 60, (4), pp. 12631270.
    13. 13)
      • 17. Shafiee, Q., Guerrero, J.M., Vasquez, J.C.: ‘Distributed secondary control for islanded microgrids – a novel approach’, IEEE Trans. Power Electron., 2014, 29, (2), pp. 10181031.
    14. 14)
      • 1. Wen, G., Hu, G., Hu, J., et al: ‘Frequency regulation of source-grid-load systems: a compound control strategy’, IEEE Trans. Ind. Inf., 2016, 12, (1), pp. 6978.
    15. 15)
      • 21. You, X., Hua, C.C., Peng, D., et al: ‘Leader–following consensus for multi-agent systems subject to actuator saturation with switching topologies and time-varying delays’, IET Control Theory Appl., 2016, 10, (2), pp. 144150.
    16. 16)
      • 12. Han, Y., Young, P.M., Jain, A., et al: ‘Robust control for microgrid frequency deviation reduction with attached storage system’, IEEE Trans. Smart Grid, 2015, 6, (2), pp. 557565.
    17. 17)
      • 8. Simpson-Porco, J.W., Shafiee, Q., Dörfler, F., et al: ‘Secondary frequency and voltage control of islanded microgrids via distributed averaging’, IEEE Trans. Ind. Electron., 2015, 62, (11), pp. 70257038.
    18. 18)
      • 16. Wu, T., Liu, Z., Liu, J., et al: ‘A unified virtual power decoupling method for droop-controlled parallel inverters in microgrids’, IEEE Trans. Power Electron., 2016, 31, (8), pp. 55875603.
    19. 19)
      • 3. Guerrero, J.M., Vasquez, J.C., Matas, J., et al: ‘Hierarchical control of droop-controlled AC and DC microgrids – a general approach toward standardization’, IEEE Trans. Ind. Electron., 2011, 58, (1), pp. 158172.
    20. 20)
      • 11. Vandoorn, T.L., Vasquez, J.C., De Kooning, J., et al: ‘Microgrids: hierarchical control and an overview of the control and reserve management strategies’, IEEE Ind. Electron. Mag., 2013, 7, (4), pp. 4255.
    21. 21)
      • 7. Dou, C.X., Li, N., Yue, D., et al: ‘Hierarchical hybrid control strategy for micro-grid switching stabilisation during operating mode conversion’, IET Gener. Transm. Distrib., 2016, 10, (12), pp. 28802890.
    22. 22)
      • 22. Wai, R.J., Lin, C.Y., Huang, Y.C., et al: ‘Design of high-performance stand-alone and grid-connected inverter for distributed generation applications’, IEEE Trans. Ind. Electron., 2013, 60, (4), pp. 15421555.
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