TY - GEN
T1 - Boundary control of dynamic voltage restorers in voltage harmonic compensation
AU - Chan, Paul K. W.
AU - Chung, Henry S.H.
AU - Hui, S.Y.R.
PY - 2006
Y1 - 2006
N2 - Dynamic voltage restorer (DVR) is used to provide load voltage support and protect sensitive load during voltage sags situation. However, voltage sags do not appear frequently and hence the utilization of the DVR is low. In order to increase the utilization of the DVR, the DVR should operate to compensate any load voltage instability especially the load voltage harmonics and source voltage variations in steady-state operation. A boundary controller using a second-order switching surface is proposed for DVR application for both voltage sags and power quality control under steady-state condition. The switching surface is derived to estimate the state trajectory movement of the DVR after a hypothesized switching action. It results in a high state trajectory velocity along the switching surface. This phenomenon accelerates the trajectory moving towards the target operating point. The dynamic performance of the DVR is verified experimentally with distorted supply voltages, non-linear loads and distorted voltage sag situation. Experimental results confirm that the proposed boundary control scheme can achieve better harmonic compensation performance than some other control methods.
AB - Dynamic voltage restorer (DVR) is used to provide load voltage support and protect sensitive load during voltage sags situation. However, voltage sags do not appear frequently and hence the utilization of the DVR is low. In order to increase the utilization of the DVR, the DVR should operate to compensate any load voltage instability especially the load voltage harmonics and source voltage variations in steady-state operation. A boundary controller using a second-order switching surface is proposed for DVR application for both voltage sags and power quality control under steady-state condition. The switching surface is derived to estimate the state trajectory movement of the DVR after a hypothesized switching action. It results in a high state trajectory velocity along the switching surface. This phenomenon accelerates the trajectory moving towards the target operating point. The dynamic performance of the DVR is verified experimentally with distorted supply voltages, non-linear loads and distorted voltage sag situation. Experimental results confirm that the proposed boundary control scheme can achieve better harmonic compensation performance than some other control methods.
KW - Boundary control
KW - Dynamic voltage restorers (DVR)
KW - Harmonic compensation
KW - Series compensation
KW - Voltage compensation
UR - http://www.scopus.com/inward/record.url?scp=42449152853&partnerID=8YFLogxK
UR - https://www.scopus.com/record/pubmetrics.uri?eid=2-s2.0-42449152853&origin=recordpage
U2 - 10.1109/PESC.2006.1711866
DO - 10.1109/PESC.2006.1711866
M3 - RGC 32 - Refereed conference paper (with host publication)
SN - 0780397169
SN - 9780780397163
BT - PESC Record - IEEE Annual Power Electronics Specialists Conference
T2 - 37th IEEE Power Electronics Specialists Conference 2006, PESC'06
Y2 - 18 June 2006 through 22 June 2006
ER -