Differential Evolution-Based Load Frequency Robust Control for Micro-Grids with Energy Storage Systems

Hongyue Li, Xihuai Wang and Jianmei Xiao
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Hongyue Li: Logistics Engineering College, Shanghai Maritime University, Shanghai 201306, China
Xihuai Wang: Logistics Engineering College, Shanghai Maritime University, Shanghai 201306, China
Jianmei Xiao: Logistics Engineering College, Shanghai Maritime University, Shanghai 201306, China

Energies, 2018, vol. 11, issue 7, 1-19

Abstract: In this paper, the secondary load frequency controller of the power systems with renewable energies is investigated by taking into account internal parameter perturbations and stochastic disturbances induced by the integration of renewable energies, and the power unbalance caused between the supply side and demand side. For this, the μ -synthesis robust approach based on structure singular value is researched to design the load frequency controller. In the proposed control scheme, in order to improve the power system stability, an ultracapacitor is introduced to the system to rapidly respond to any power changes. Firstly, the load frequency control model with uncertainties is established, and then, the robust controller is designed based on μ -synthesis theory. Furthermore, a novel method using integrated system performance indexes is proposed to select the weighting function during controller design process, and solved by a differential evolution algorithm. Finally, the controller robust stability and robust performance are verified via the calculation results, and the system dynamic performance is tested via numerical simulation. The results show the proposed method greatly improved the load frequency stability of a micro-grid power system.

Keywords: load frequency control; model uncertainty; ? -synthesis; differential evolution (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (5)

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