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Modeling and sliding-mode control method of 4-quadrant conversion system |
ZHANG Jia-sheng, PAN Da-wei
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(College of Information and Control Engineering in China University of Petroleum, Dongying 257061,Shandong Province, China)
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Abstract: |
A dynamic small signal model, transfer function and steady state model as concerns ac-side current amplitude and dc-side output voltage were derived from the state space averaging model of the 4-quadrant converter by using linearization processing for its multivariable, time-variability and nonlinearity. In the 4-quadrant conversion system, the static and dynamic quality of multiple physical variables in both input and output is concerned concurrently. Considering the control features of the system, a sliding-mode-variable-structure control method combined with an integral compensation element was presented on the basis of the three models. Its linear switching control strategy was applied to voltage controller design and system simulating research. Both the experimental results and the simulation results show that the system has a high quality in performance. |
Key words: 4-quadrant converter transfer function sliding-mode control control strategy phase rajectory |
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