Enhancing compensating capability is essential in a voltage-sag compensator. It involves two main aspects, first, sag detection technique and second, voltage sag compensator. Many detection techniques have been introduced to measure and to detect voltage sag, such as RMSValue Evaluation and Peak-Value Evaluation. Unfortunately, most of the techniques require a delay for sag to be detected then ...

The main problems of the power quality like voltage sags/swells in low voltage distribution systems and on the transmission side due to sensitive loads, the terminology used for the compensation devices is different. Dynamic Voltage Restorer (DVR) is one of the equipments for voltage disturbance mitigation in power systems. It is installed between the incoming supply and the sensitive loads to ...

The dynamic voltage restorer (DVR) combined with a photovoltaic–thermoelectric generator (PV-TEG) system is proposed for disturbance compensation in the three-phase four-wire distribution system. PV-TEG hybrid energy source used DVR to improve ability deep and long-period power quality compensation. In addition, will save grid consumption when module generates sufficient meet load demand. An en...

The electric power distribution system must be designed to operate and supply acceptable level of electrical energy to customers. Power utilities must ensure that the power supply to customers is with voltage magnitude within standard levels. Other features like minimal interruptions and minimal system power loss also must be considered. Hence, the quality and reliability of supply must be main...

This paper describes the model and analyzes custom power devices for compensating voltage sag and swell conditions in three phase systems. Faults occurring in power distribution systems or facilities in plants cause the voltage sag or swell. If a fault occurs, it can damage the power system or user’s facility. Sensitivity to voltage sags and swells varies within different applications. For sens...

In the power system voltage sag become the important issue for industries. According to the survey 92% of the interruptions at industrial installations are voltage sag related. In various companies voltage sag may affect many manufactures and introduce sufficient losses in the power system. The voltage sag compensator, based on a transformer coupled series connected voltage source inverter, is ...

-Dynamic Voltage Restorer (DVR) is a device used to mitigate voltage sags which are a significant power quality issue. This paper involves mathematical calculation for leading series voltage injection for mitigation of sags thereby achieving utility power factor improvement as well as power sharing between DVR and utility as per requirement and available distributed generation. Mathematical der...

Power quality is one of major concerns in the present. 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 frequency that results in a failure of end use equipments. To solve this problem, custom power devices are...