Open AccessCoordination of storage and generation in power system frequency control using an H ∞ approach
Author(s) -
Zhu Dinghuan,
HugGlanzmann Gabriela
Publication year - 2013
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.2012.0522
Subject(s) - automatic frequency control , frequency deviation , control theory (sociology) , controller (irrigation) , weighting , energy storage , computer science , control engineering , electric power system , renewable energy , power (physics) , engineering , control (management) , electrical engineering , medicine , physics , radiology , quantum mechanics , artificial intelligence , biology , agronomy , telecommunications
This study proposes a novel H ∞ ‐based approach called advanced frequency control (AFC) to integrate storage into frequency control. The objective is to split the task of balancing frequency deviations introduced by renewable energy source (RES) and load variations according to the capabilities of storage and generators. Hence, via frequency dependent weighting functions, a so‐called frequency separation objective is achieved: the conventional generators mainly balance the low‐frequency components of the RES and load variations while the energy storage devices compensate the high‐frequency components. First, a state‐space structure‐preserving model of the power system is derived, which is needed for the design of the controller. In order to enable the controller design for storage devices located at buses with no generators, a model for the frequency at such a bus is developed. Then, AFC controllers are synthesised through decentralised static output feedback to reduce the complexity in the practical implementation of such controllers. An existing linear matrix inequality algorithm is improved and employed to solve the involved H ∞ problem. Finally, the WECC 9‐bus test system is used to verify the performance of the AFC design.