<p><span lang="EN-US">The power quality issues are raised due to sag/swell, which affects the overall performance of grid-connected system. This study introduces hybrid control mechanism based on a dynamic voltage restorer (DVR) mitigate sag and swell in solar PV-based IEEE 33 bus The controller improves boosts efficiency DVR proposed work is also used address distribution system's ...

Custom power devices such as dynamic voltage restorer (DVR) and DSTATCOM are used to improve the power quality in distribution systems. These devices require real power to compensate the deep voltage sag during sufficient time. An interline DVR (IDVR) consists of several DVRs in different feeders. In this paper, a neural network is proposed to control the IDVR performance to achieve optimal mit...

This paper proposes the designing of regional compensation type Dynamic Voltage Restorer(DVR), and the topology of main circuit, the detection algorithm for voltage sag, the calculation method of reference voltage and pulse modulation method. Based on the different load types of the target substation and the sensitivity to voltage sags, the selection principle of the location of compensation li...

A dynamic voltage restorer (DVR) is developed to stabilize the three-phase load under sudden grid distortion conditions, including sag, swell and unbalance. The DVR composed of a DC\AC inverter DC-link capacitor regarded as energy storage element. When occurs, instant power compensate or absorb realized by resulted in degenerate stabilization performance poor transient quality load. Hence, cont...

Power quality is one of major concerns in the present era. It has become important, especially, with the introduction of sophisticated devices, whose performance is very sensitive to the quality of power supply. Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that results in a failure or mis-operation of end user equipments. One of the major prob...

This paper presents a new algorithm for the determination of DC voltage source levels of asymmetric multilevel converters. This technique provides more flexibility to the designer and can generate a large number of levels (odd and even), with minimum number of single-phase full-bridge inverters. This point results in the reduction of switches number, losses, cost of the converter, installation ...

This paper investigates the power quality problems which occur frequently in supply and suggests a method to mitigate by implementation of UPQC. P-Q generally concern with voltage sags/swells harmonic currents. Custom Power (CP) devices that these have gained more attention recent decades. UPQC is Designed, modelled setup experimentally sag/swells currents three phase systems. consists Dynamic ...

The Quality of the output power from the utilities has become a major concern of the modern industries. These power quality associated problems are voltage sag, surge, flicker, voltage imbalance, interruptions and harmonic problems. These power quality problems may cause problems to the industries ranging from malfunctioning of equipment to complete plant shut down. It has been identified that ...

This paper presents an improvement to the fault ride-through (FRT) capabilities for a wind turbine that employs switched reluctance generator (SRG) using dynamic voltage restorer (DVR). The may be disconnected from grid by sag, swell, and faulty line in grid. To improve stator of SRG during failures, DVR is applied inject at point common coupling (PCC) into voltage. A control strategy based on ...