this paper presents a control strategy for fuel cell/energy storage power generation system during voltage sag conditions. the hybrid dc power sources are connected to grid using power electronic converters include dc-dc converter and grid connected voltage source inverter. the power from hybrid power sources is controlled during voltage sag by designing of control strategy for dc-dc converter....

In this paper, a second order sliding mode control scheme is utilized for outer voltage loop of three-phase fault current limiter-based dynamic restorer (FCL-DVR) instead conventional proportional integral/proportional resonance (PI/PR) controller. The new strategy improves the performance FCL-DVR against distortion. Furthermore, by using proposed robustness controller, can smoothly switch betw...

The Dynamic Voltage Restorer (DVR) is one of the most efficient and effective custom power devices in protecting sensitive equipment against voltage sag harmonics due to; lower cost, smaller size dynamic response. inverter core DVR it directly affects performance DVR, incorrect injection or delay process would be dangerous to loads. major functions controller are, detection disturbances events ...

In this paper, the compensation of voltage sags and swells using a dynamic restorer (DVR) based on bi-directional AC/AC converter is presented for stabilizing single-phase AC line voltage. The H-bridge with switches without bulk capacitor adopted as power topology proposed system. novel DVR to compensate both sag swell conditions. Additionally, factor closed unity because not required. inner ou...

Voltage sag and voltage swell are frequently occurred power quality problems in present distribution system, which cause more to avoid these maintain constant at sensitive load during Dynamic restorer gives solution .we propose self-supported DVR, minimize the cost by preventing external dc source it is controlled SRF PI control along with an inner current loop stabilize system outer increase r...