Enhanced distributed secondary control method for DC microgrids against heterogeneous communication time delays

Duy-Long Nguyen; Hong-Hee Lee

Enhanced distributed secondary control method for DC microgrids against heterogeneous communication time delays

Duy-Long Nguyen

Hong-Hee Lee

Vol. 23, No. 1, pp. 127-138, Jan. 2023

10.1007/s43236-022-00559-y

Microgrids

Consensus-based distributed control scheme

Voltage shifting method

Abstract

Accurate power sharing in a DC microgrid with a conventional distributed control scheme is impossible to achieve due to the heterogeneity of communication time delays. To address this problem, an anti-heterogeneous time delay estimator is proposed on the basis of scattering transformation and a PI consensus algorithm, and proper power allocation is achieved along with voltage compensation in a distributed fashion. In the proposed estimator, transmitted/received signals are modified via scattering transformation, and average consensus is estimated by the PI consensus algorithm. Consequently, proportional power sharing and voltage compensation are achieved concomitantly despite heterogeneous temporal delays, mismatched line resistances, and load variation. The effectiveness of the proposed method is evaluated through experiments.

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Cite this article

[IEEE Style]

D. Nguyen and H. Lee, "Enhanced distributed secondary control method for DC microgrids against heterogeneous communication time delays," Journal of Power Electronics, vol. 23, no. 1, pp. 127-138, 2023. DOI: 10.1007/s43236-022-00559-y.

[ACM Style]

Duy-Long Nguyen and Hong-Hee Lee. 2023. Enhanced distributed secondary control method for DC microgrids against heterogeneous communication time delays. Journal of Power Electronics, 23, 1, (2023), 127-138. DOI: 10.1007/s43236-022-00559-y.