摘要：This paper presents fuzzy logic controlled dc-dc boost converter based Dynamic Voltage
Restorer (DVR) to compensate severe voltage sag problems in an electrical system. DVR
absorbs real power from battery to compensate voltage sags in the system. This condition causes
reduction in voltage magnitude of dc-link capacitor. Additionally, DVR requires large dc
capacitors to compensate long and severe voltage sags in the system. In this study, dc-dc boost
converter is connected to DVR for keeping dc link voltage constant. For this propose, a control
algorithm based on Fuzzy Logic (FL) control is developed for dc-dc boost converter. The main
contribution of this study is that Fuzzy Logic (FL) is firstly used to generate reference signal
for PWM signals of dc-dc converter applied in DVR. FL is a very flexible controller which keeps
the dc link voltage constant during voltage sag. The performance results of proposed study are
verified with PSCAD/EMDTC.
关键词：fuzzy logic; DVR; voltage sag; dc link voltage
