Output Feedback PID Based Governor Control to improve Generator Damping for Power System Stabilization

Abstract This paper presents a new governor control scheme based on an Output Feedback PID controller which guarantees the control stability associated with the feedback gain and improves damping of the generator. The proposed control scheme of speed governor is developed on the basis of the PID controller in the previous study. The differential feedback has been replaced by the nonlinear output feedback. The proposed output feedback control has two advantages: first, it guarantees the wide-range of stable region for any change in the frequency regulation droop R with differential and integral feedback gains chosen in some proper range, and second remarkably improves generator damping free from havoc by the differential feedback. This paper discusses the possibility that the proposed governor control can be utilized as one of the means for power system stabilization (PSS). The computer simulations have been conducted on three cases, which show that generator damping can be remarkably improved by the proposed frequency control scheme.

[1]  Young-Hyun Moon,et al.  Modified PID load-frequency control with the consideration of valve position limits , 1999, IEEE Power Engineering Society. 1999 Winter Meeting (Cat. No.99CH36233).

[2]  K. Natarajan,et al.  Robust PID controller design for hydroturbines , 2005, IEEE Transactions on Energy Conversion.

[3]  Zhan Xu,et al.  Robust analysis and design of load frequency controller for power systems , 2008, 2008 IEEE International Conference on Control Applications.

[4]  Donald A. Pierre,et al.  Robust power system controller design based on measured models , 1996 .

[5]  Young-Hyun Moon,et al.  Improvement of system damping by using the differential feedback in the load frequency control , 1999, IEEE Power Engineering Society. 1999 Winter Meeting (Cat. No.99CH36233).

[6]  James D. McCalley,et al.  Damping controller design for power system oscillations using global signals , 1996 .

[7]  F. Profumo,et al.  A unitary approach to speed sensorless induction motor field oriented drives based on various model reference schemes , 1996, IAS '96. Conference Record of the 1996 IEEE Industry Applications Conference Thirty-First IAS Annual Meeting.

[8]  Wen Tan,et al.  Tuning of PID load frequency controller for power systems , 2009 .

[9]  A. M. Stankovic,et al.  Towards a dissipativity framework for power system stabilizer design , 1996 .

[10]  Zhan Xu,et al.  Robust analysis and design of load frequency controller for power systems , 2009 .

[11]  Ali Feliachi,et al.  Stabilization of inter-area oscillation modes through excitation systems , 1994 .

[12]  G. J. Rogers,et al.  A fundamental study of inter-area oscillations in power systems , 1991 .