TY - GEN
T1 - Reactive power estimation based control of self supported dynamic voltage restorer (DVR)
AU - Kanjiya, Parag
AU - Khadkikar, Vinod
AU - Zeineldin, H. H.
AU - Singh, Bhim
PY - 2012
Y1 - 2012
N2 - The dynamic voltage restorer (DVR) is an attractive solution to protect sensitive loads from voltage sag, swell, unbalance and voltage harmonics. When the injected voltages by the DVR are in quadrature with line currents, the DVR can be supported by a capacitor on DC side. In this paper, a new and simple control algorithm based on reactive power estimation is proposed for a self-supported DVR. The DVR is controlled by tracking the load voltages to their reference values computed by the proposed control algorithm in the stationary reference frame. Furthermore, a proportional-resonant (PR) controller is utilized to avoid any reference frame transformation. Moreover, the PR controller has very high gain at both positive and negative sequence frequencies and thus it is used to achieve a better unbalance compensation without using two separate positive and negative sequence controllers. The proposed control strategy is validated by performing simulation studies in MATLAB environment. The simulation results for voltage sag, swell, harmonic and unbalance compensation using the proposed control algorithm are discussed.
AB - The dynamic voltage restorer (DVR) is an attractive solution to protect sensitive loads from voltage sag, swell, unbalance and voltage harmonics. When the injected voltages by the DVR are in quadrature with line currents, the DVR can be supported by a capacitor on DC side. In this paper, a new and simple control algorithm based on reactive power estimation is proposed for a self-supported DVR. The DVR is controlled by tracking the load voltages to their reference values computed by the proposed control algorithm in the stationary reference frame. Furthermore, a proportional-resonant (PR) controller is utilized to avoid any reference frame transformation. Moreover, the PR controller has very high gain at both positive and negative sequence frequencies and thus it is used to achieve a better unbalance compensation without using two separate positive and negative sequence controllers. The proposed control strategy is validated by performing simulation studies in MATLAB environment. The simulation results for voltage sag, swell, harmonic and unbalance compensation using the proposed control algorithm are discussed.
KW - Dynamic voltage restorer
KW - Power quality
KW - Voltage sag
KW - Voltage swell
KW - Voltage unbalance compensation
UR - http://www.scopus.com/inward/record.url?scp=84873476126&partnerID=8YFLogxK
U2 - 10.1109/ICHQP.2012.6381306
DO - 10.1109/ICHQP.2012.6381306
M3 - Conference contribution
AN - SCOPUS:84873476126
SN - 9781467319430
T3 - Proceedings of International Conference on Harmonics and Quality of Power, ICHQP
SP - 785
EP - 790
BT - Proceedings of 2012 IEEE 15th International Conference on Harmonics and Quality of Power, ICHQP 2012
T2 - 2012 IEEE 15th International Conference on Harmonics and Quality of Power, ICHQP 2012
Y2 - 17 June 2012 through 20 June 2012
ER -