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Title: Inertial and damping characteristics of dC distributed power systems based on frequency droop control
Authors: Xiu, LC
Xiong, LS 
Yang, P
Kang, ZL
Keywords: Frequency droop control
DC distributed power systems (DDPSs)
Inertia response
Damping effect
DC voltage control (DVC) timescale
Issue Date: 2018
Publisher: Molecular Diversity Preservation International (MDPI)
Source: Energies, Sept. 2018, v. 11, no. 9, 2418, p. 1-14 How to cite?
Journal: Energiesonline only 
Abstract: With high penetration of renewable energy, DC distributed power systems (DDPSs) need to improve the inertia response and damping capacity of the power grid. The effects of main circuit parameters and control factors on the inertia, damping and synchronization of the DDPS were studied in this paper. Firstly, the dynamic model of DDPSs based on frequency droop control is established in the DC voltage control (DVC) timescale. Then, a static synchronous generator (SSG) model is used to analyze the parameters that affect the inertial level, damping effect and synchronization capability of the DDPS. The analysis results show that an optimal design of the frequency droop coefficient and proportional integral (PI) parameters of the DC bus voltage control loop can equivalently change the characteristics of inertia and damping when the frequency droop control strategy is applied to the DC/DC converter and the DC bus voltage control strategy is used in the grid-tied inverter. Simulation results verify the correctness of the conclusions. This paper helps to design an effective control strategy for DDPSs to enhance the inertial level and damping effect of the power grid and to improve the stable operation capability of renewable energy systems.
EISSN: 1996-1073
DOI: 10.3390/en11092418
Rights: © 2018 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (
The following publication Xiu, L.C., Xiong, L.S., Yang, P., & Kang, Z.L. (2018). Inertial and damping characteristics of dC distributed power systems based on frequency droop control. Energies, 11 (9), 2418, p. 1-14 is available at
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