Yazar "Kruschel, Wolfram" seçeneğine göre listele

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    Chattering free robust control of LCL filter based shunt active power filter using adaptive second order sliding mode and resonant controllers
    (Elsevier Sci Ltd, 2016) Kale, Murat; Karabacak, Murat; Kruschel, Wolfram; Kılıç, Fuat; Zacharias, Peter
    This paper proposes a new robust adaptive controller for LCL filter based shunt active power filters in order to solve the control problems of high overshoot and large settling time in the DC link voltage. To this end, the second order sliding mode with the adaptive gain super-twisting control law and proportional-resonant controllers with active damping are used in the DC bus voltage control loop and d-q axis current control loops respectively. The control objectives are fourfold: (I) driving the DC bus voltage to a reference signal; (ii) forcing the d-q axis current errors to zero; (iii) assuring a satisfactory power factor correction and a high harmonic performance in relation to the AC source; and (iv) eliminating the chattering effect. In the closed loop control system, three phase grid currents, LCL capacitor currents and the DC link voltage are available for feedback. As a result, the proposed controller has the advantages of zero overshoot response and fast acting chattering-free behavior. Results of experimental studies prove that the proposed control system guarantees to track reference signals with a high harmonic performance despite external disturbance uncertainties. (C) 2015 Elsevier Ltd. All rights reserved.
  • Küçük Resim
    Öğe
    Use of Multifunctional Power Electronic Network Controllers in Smart Distribution Systems
    (Ieee, 2014) Kale, Murat; Hauer, Ines; Kruschel, Wolfram; Maurer, Tobias; Zacharias, Peter
    Diverse and dynamic load and generation patterns are putting new demands on the operation of distribution networks. New network management approaches and innovative equipment are needed to handle highly volatile voltage profiles resulting from intermittent distributed generation. This paper investigates the use of an inline voltage regulator in a LV network. As simulations based on realistic feed-in scenarios show, it is an efficient tool for influencing a network's voltage profile. Since voltage regulation is not required permanently, such a flexible power electronic device can be further used to increase a power system's efficiency and reliability by implementing features such as reactive power compensation or mitigation of harmonics. Concerning this matter, an approach for an adaptive system management is discussed that allows the provision of additional functionality whenever the converter is not used to its full capacity for the voltage regulation task.