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Load Voltage Tracking of Electric Power Systems by Using Backstepping Design
Der-Cherng Liaw,Shih-Tse Chang,Yun-Hua Huang,Jen-Tze Huang,Tzu-Chung Yenn 제어로봇시스템학회 2009 제어로봇시스템학회 국제학술대회 논문집 Vol.2009 No.8
A backstepping controller design is proposed for the load voltage tracking of electric power system. It is known that a power system might exhibit saddle-node and Hopf bifurcations as load change, which can lead to the appearance of dynamic and/or static voltage collapses. The output tracking control laws are proposed for the load voltage regulation of the electric power system via backstepping control scheme. The numerical simulations demonstrate that the proposed control scheme not only could provide the regulation of the load voltage but also prevent and/or delay the appearance of bifurcation phenomena and chaotic behavior.
Development of Composite Load Models of Power Systems using On-line Measurement Data
Choi Byoung-Kon,Chiang Hsiao Dong,Li Yinhong,Chen Yung Tien,Huang Der Hua,Lauby Mark G. The Korean Institute of Electrical Engineers 2006 Journal of Electrical Engineering & Technology Vol.1 No.2
Load representation has a significant impact on power system analysis and control results. In this paper, composite load models are developed based on on-line measurement data from a practical power system. Three types of static-dynamic load models are derived: general ZIP-induction motor model, Exponential-induction motor model and Z-induction motor model. For the dynamic induction motor model, two different third-order induction motor models are studied. The performances in modeling real and reactive power behaviors by composite load models are compared with other dynamic load models in terms of relative mismatch error. In addition, numerical consideration of ill-conditioned parameters is addressed based on trajectory sensitivity. Numerical studies indicate that the developed composite load models can accurately capture the dynamic behaviors of loads during disturbance.
Development of Composite Load Models of Power Systems using On-line Measurement Data
Byoung-Kon Choi,Hsiao-Dong Chiang,Yinhong Li,Yung-Tien Chen,Der-Hua Huang,Mark G. Lauby 대한전기학회 2006 Journal of Electrical Engineering & Technology Vol.1 No.2
Load representation has a significant impact on power system analysis and control results. In this paper, composite load models are developed based on on-line measurement data from a practical power system. Three types of static-dynamic load models are derived: general ZIP-induction motor model, Exponential-induction motor model and Z-induction motor model. For the dynamic induction motor model, two different third-order induction motor models are studied. The performances in modeling real and reactive power behaviors by composite load models are compared with other dynamic load models in terms of relative mismatch error. In addition, numerical consideration of ill-conditioned parameters is addressed based on trajectory sensitivity. Numerical studies indicate that the developed composite load models can accurately capture the dynamic behaviors of loads during disturbance.