Decentralised power system load frequency control beyond the limit of diagonal dominance
Yang, T.C.; Ding, Z.T.; Yu, H.
Dr Hongnian Yu H.Yu@napier.ac.uk
The design of decentralised robust load frequency control for interconnected multi-area power systems is studied in this paper. It is shown that although the design can be naturally formulated as a large-scale system decentralised control problem, it can be translated into an equivalent problem of decentralised controller design for a multi-input multi-output (MIMO) control system. It is known that simple controllers can be designed to achieve satisfactory performances if diagonal dominance can be achieved in a multivariable system. This is further extended in this paper. Using the design method proposed in this paper, even when the diagonal dominance cannot be achieved, subject to a condition based on the structured singular values (SSVs), each local area load-frequency controller can be designed independently. The robust stability condition for the overall system can be easily stated as to achieve a sufficient interaction margin, and a sufficient gain and phase margin during each independent design.
Yang, T., Ding, Z., & Yu, H. (2002). Decentralised power system load frequency control beyond the limit of diagonal dominance. International Journal of Electrical Power and Energy Systems, 24(3), 173-184. https://doi.org/10.1016/s0142-0615%2801%2900028-x
|Journal Article Type||Article|
|Acceptance Date||Mar 14, 2001|
|Online Publication Date||Jan 8, 2002|
|Deposit Date||Jun 15, 2022|
|Journal||International Journal of Electrical Power & Energy Systems|
|Peer Reviewed||Peer Reviewed|
|Keywords||Multi-input multi-output, Structured singular values, Decentralised load frequency control|
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