The Transactions of the Korean Institute of Electrical Engineers A (대한전기학회논문지:전력기술부문A)

The Korean Institute of Electrical Engineers (대한전기학회)
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Extended Integral Control with the PI Controller

확장적분 제어개념을 도입한 PI 제어기에 관한 연구

  • 류헌수 (연세대 대학원 전기공학과) ;
  • 정기영 (LG 산전 전력연구소 SCADA 연구팀) ;
  • 송경빈 (계명대 컴퓨터·전자공학과) ;
  • 문영현 (연세대 전기공학과)
  • Published : 2000.07.01
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Abstract

This paper presents an extended integral control with the PI controller by introducing the delay and decaying factors. The extended integral control scheme is developed by substituting the proportional convolution integral control for the PI(Proportional Integral) control. So far, the integral part of PI controller produces a signal that is proportional to the time integral of the input signal to the controller. The steady-state operation points are affected forever by errors in the past due to the input signal containing the information of the error in the past. These phenomena may cause some disturbances for other control purposes related to the given PI control. Introduction of forgetting factors to the error in the past can resolve the disturbance problems. Various forgetting factors are developed using the delay elements, the decaying factors, and the combination of the delay and decaying factors. The proposed various extended integral control schemes can be applicable to the corresponding PI control designs in which the error in the past may badly affect the current steady-state operation points and may cause some disturbances for other control purposes.

Keywords

References

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