On implementations of H² preview output feedback law with application to LFC with load demand prediction

ABSTRACT

This paper addresses a continuous-time $H^2$ preview control problem in output feedback setting. By a state transformation approach, it is shown that the optimal output feedback law is implemented in two different ways. The first and second implementations have the structures similar to the Smith and observer-based predictors for input-delay systems, respectively. In order to illustrate the features of the optimal control law, we design an Load Frequency Control system, which utilises load demand prediction. Although the accompanying prediction error obstacles the performance improvement, it is demonstrated that the adverse effect is mitigated by the weighting function technique.

KEYWORDS:

• $H^2$ preview output feedback
• mith-type and observer-based implementations
• LFC with load demand prediction

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was supported by JST CREST [grant number JPMJCR15K1] and JSPS under Grant-in-Aid for Scientific Research (C) [grant number 26420423].