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Stabilization of inter‐area and/or oscillatory modes in large‐scale power system by voltage impedance power system (VIPS) apparatus based on decentralized control scheme
Author(s) -
Nagata Masaki,
Yokoyama Akihiko,
Sekine Yasuji
Publication year - 1995
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391150805
Subject(s) - electric power system , control theory (sociology) , engineering , electrical impedance , robustness (evolution) , power (physics) , control engineering , electronic engineering , computer science , electrical engineering , control (management) , biochemistry , physics , chemistry , quantum mechanics , artificial intelligence , gene
New technologies such as power electronics have made it possible to change continuously the impedance of a power system not only to control power flow but also to enhance stability. A power system incorporating a variable impedance apparatus such as a variable series capacitor (VSrC) and high‐speed phase shifter (HSPS) is called VIPS (Variable Impedance Power System) by the authors. This paper proposes a novel control method of VIPS apparatus such as VSrC and HSPS installed at an interconnecting point for stabilizing inter‐area unstable and/or oscillatory modes. The proposed design method of the control system is a kind of hierarchical decentralized control method of a large‐scale power system based on a Lyapunov function. Under the proposed control scheme, each subsystem can be stabilized independently by local controllers such as AVR, speed governor and PSS, and then the whole interconnected system can be stabilized by VIPS apparatus taking into account interactions between subsystems. The effectiveness and robustness of the VIPS apparatus control are shown by numerical examples with model systems including a large‐scale power system.