Open AccessIntegration of electric vehicles for load frequency output feedback H ∞ control of smart grids
Author(s) -
Pham Thanh Ngoc,
Trinh Hieu,
Hien Le Van,
Wong Kit Po
Publication year - 2016
Publication title -
iet generation, transmission and distribution
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.92
H-Index - 110
eISSN - 1751-8695
pISSN - 1751-8687
DOI - 10.1049/iet-gtd.2016.0375
Subject(s) - control theory (sociology) , controller (irrigation) , computer science , automatic frequency control , stability (learning theory) , linear matrix inequality , electric power system , power (physics) , turbine , control (management) , control engineering , mathematical optimization , engineering , mathematics , telecommunications , artificial intelligence , mechanical engineering , physics , quantum mechanics , machine learning , agronomy , biology
This study considers a novel application of electric vehicles (EVs) to quickly help reheated thermal turbine units to provide the stability fluctuated by load demands. A mathematical model of a power system with EVs is first derived. This model contains the dynamic interactions of EVs and multiple network‐induced time delays. Then, a dynamic output feedback H ∞ controller for load frequency control of power systems with multiple time delays in the control input is proposed. To address the multiple time delays issue, a refined Jensen‐based inequality, which encompasses the Jensen inequality, is used to derive less conservative synthesis conditions in terms of tractable linear matrix inequalities. A procedure is given to parameterise an output feedback controller to guarantee stability and H ∞ performance of the closed‐loop system. Extensive simulations are conducted to validate the proposed control method.