An advanced LFC design considering parameter uncertainties in power systems

Satoshi Ohba*, Haruka Ohnishi, Shinichi Iwamoto

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

18 Citations (Scopus)


In this paper, we propose a designing method of the load frequency control, which is able to consider uncertainties in power systems. We design the control system utilizing PID controllers for an H control problem. Even though many advanced control theories have been established, most industrial controllers still use conventional applications such as PI, PID, and simple first-order lag/lead compensators. The H control theory can deal with many robust stability and performance problems. We especially pay attention to the inertia constant, the damping coefficient, and the synchronizing coefficient because these parameters change their values or have some errors depending on conditions of the power system. As an example, we design a case of a two-area system, and carry out simulations to compare the proposed method with a conventional method (a PI type controller). As the results of the simulations, we can confirm the effectiveness of the proposed method.

Original languageEnglish
Title of host publication2007 39th North American Power Symposium, NAPS
Number of pages6
Publication statusPublished - 2007
Externally publishedYes
Event2007 39th North American Power Symposium, NAPS - Las Cruces, NM
Duration: 2007 Sept 302007 Oct 2


Other2007 39th North American Power Symposium, NAPS
CityLas Cruces, NM


  • Automatic generator control
  • H control theory
  • Load frequency control
  • Parameter space
  • PID control
  • Robust control theory

ASJC Scopus subject areas

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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