Abstract
Due to low inertia, high penetration of renewable generators in isolated micro-grids may result in poor frequency and voltage response under large disturbances. In order to overcome this difficulty, the distributed average consensus algorithm has been studied recently by extending local droop control mechanisms of power converters into distributed droop control. However, its convergence rate and the resilience to noises are still not satisfactory. In this paper, two implementations of consensus-based distributed droop control by the alternating direction multipliers method are proposed. It can be shown that the closed-loop system is described by the second-order vector differential equation, and the stability of every trajectory can be analyzed by the energy function approach under certain mild conditions. Real-Time digital simulations are performed to validate the effectiveness of the proposed distributed droop control mechanism.
Original language | English |
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Article number | 7875161 |
Pages (from-to) | 5101-5112 |
Number of pages | 12 |
Journal | IEEE Transactions on Smart Grid |
Volume | 9 |
Issue number | 5 |
DOIs | |
State | Published - 09 2018 |
Externally published | Yes |
Bibliographical note
Publisher Copyright:© 2010-2012 IEEE.
Keywords
- DER interface converter (DIC)
- Distributed energy resource (DER)
- alternating direction multipliers method (ADMM)
- average consensus
- droop control
- energy function (EF)
- micro-grid (MG)
- virtual synchronous generator (VSG)