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Theoretical analysis and experimental validation of single-phase direct vs. cascade voltage control in Islanded microgrids

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Abstract
The increasing number of distributed generation units has led to the development of microgrids, to which the distributed generators are commonly interfaced by means of a voltage-source inverter (VSI). When the microgrid is operating independently of the power system, i.e., in islanded mode, two levels of control can be distinguished for these VSIs: power control and voltage control (frequency and amplitude). The set-point values for the voltage controller are obtained from the power controller. This paper investigates theoretically and experimentally the benefits of using several PID control structures for the voltage control. Theoretical insights into the dynamics of such a system emphasize the benefits of measuring current signals for control purposes and adding voltage measurements to the output of the controllers. Direct voltage control and cascade voltage control are compared both with and without forward compensation of the grid voltage. Simulation and experimental results are given showing that such PID-type controllers on a digital signal processor are simple yet effective strategies for an accurate voltage control in islanded microgrids.
Keywords
voltage control, voltage-source inverter (VSI), microgrids, PID control, CONVERTERS, DISTRIBUTED CONTROL, GENERATION, distributed generation (DG), Cascade control, NETWORK, INVERTERS, SYSTEMS, MANAGEMENT, IMPEDANCE

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Citation

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Chicago
Vandoorn, Tine, Clara-Mihaela Ionescu, Jeroen De Kooning, Robain De Keyser, and Lieven Vandevelde. 2013. “Theoretical Analysis and Experimental Validation of Single-phase Direct Vs. Cascade Voltage Control in Islanded Microgrids.” Ieee Transactions on Industrial Electronics 60 (2): 789–798.
APA
Vandoorn, T., Ionescu, C.-M., De Kooning, J., De Keyser, R., & Vandevelde, L. (2013). Theoretical analysis and experimental validation of single-phase direct vs. cascade voltage control in Islanded microgrids. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS, 60(2), 789–798.
Vancouver
1.
Vandoorn T, Ionescu C-M, De Kooning J, De Keyser R, Vandevelde L. Theoretical analysis and experimental validation of single-phase direct vs. cascade voltage control in Islanded microgrids. IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS. 2013;60(2):789–98.
MLA
Vandoorn, Tine, Clara-Mihaela Ionescu, Jeroen De Kooning, et al. “Theoretical Analysis and Experimental Validation of Single-phase Direct Vs. Cascade Voltage Control in Islanded Microgrids.” IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS 60.2 (2013): 789–798. Print.
@article{2330926,
  abstract     = {The increasing number of distributed generation units has led to the development of microgrids, to which the distributed generators are commonly interfaced by means of a voltage-source inverter (VSI). When the microgrid is operating independently of the power system, i.e., in islanded mode, two levels of control can be distinguished for these VSIs: power control and voltage control (frequency and amplitude). The set-point values for the voltage controller are obtained from the power controller. This paper investigates theoretically and experimentally the benefits of using several PID control structures for the voltage control. Theoretical insights into the dynamics of such a system emphasize the benefits of measuring current signals for control purposes and adding voltage measurements to the output of the controllers. Direct voltage control and cascade voltage control are compared both with and without forward compensation of the grid voltage. Simulation and experimental results are given showing that such PID-type controllers on a digital signal processor are simple yet effective strategies for an accurate voltage control in islanded microgrids.},
  author       = {Vandoorn, Tine and Ionescu, Clara-Mihaela and De Kooning, Jeroen and De Keyser, Robain and Vandevelde, Lieven},
  issn         = {0278-0046},
  journal      = {IEEE TRANSACTIONS ON INDUSTRIAL ELECTRONICS},
  keyword      = {voltage control,voltage-source inverter (VSI),microgrids,PID control,CONVERTERS,DISTRIBUTED CONTROL,GENERATION,distributed generation (DG),Cascade control,NETWORK,INVERTERS,SYSTEMS,MANAGEMENT,IMPEDANCE},
  language     = {eng},
  number       = {2},
  pages        = {789--798},
  title        = {Theoretical analysis and experimental validation of single-phase direct vs. cascade voltage control in Islanded microgrids},
  url          = {http://dx.doi.org/10.1109/TIE.2012.2205362},
  volume       = {60},
  year         = {2013},
}

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