Open AccessEquivalent input disturbance‐based robust LFC strategy for power system with wind farms
Author(s) -
Liu Fang,
Ma Junjie
Publication year - 2018
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.2017.1901
Subject(s) - control theory (sociology) , wind power , disturbance (geology) , electric power system , compensation (psychology) , automatic frequency control , robust control , grid , power (physics) , automatic generation control , computer science , control (management) , engineering , control system , mathematics , telecommunications , paleontology , physics , electrical engineering , quantum mechanics , artificial intelligence , psychology , geometry , psychoanalysis , biology
Due to the intermittent power generation, wind farms integrated into the grid may cause a problem of large frequency fluctuation, when the capacity of load frequency control (LFC) is not enough to compensate the unbalance between the generation and the load demand. In this study, a new robust LFC strategy against load disturbance and wind power fluctuation is proposed to improve the disturbance‐resistant performance of the power system with wind farms. First, a simplified model of the power system with wind farms is established without considering the accurate model information. Then, a control scheme based on the compensation of equivalent input disturbance (EID) is introduced, and a method of EID estimation is presented. The robust LFC design addresses various disturbances and internal/external uncertainties of power systems. Finally, to evaluate the effectiveness of the proposed method, two case studies are carried out and the performance comparisons with the classical proportional–integral–derivative control scheme are used to confirm the proposed method.