Dynamic Voltage Restorer Cost Reduction in the Distributed Generation Environment

Abstract

The deregulation trend stimulates engineers to reconfigure the electric system's structure and to establish new concepts for coordination among existing and new electric equipment. Recently, distributed generation (DG) has been introduced as a local power source for both electric utilities and customers. This article presents the positive and revolutionary impact of the existing DG in assisting the dynamic voltage restorer (DVR) in mitigating severe transient problems such as different types of voltage sags. It also consummates the union of two power devices, the DG and DVR, which have never interacted together in a power system before. With the introduction of DG into the system, the DVR's rating and cost are reduced. Digital simulation results are demonstrated to show the substantial impact of DG in stabilizing the system voltage profile and reducing the DVR rating. A brief cost analysis is introduced to emphasize the constructive impact of DG in reducing the DVR costs.

Keywords:

• cost reduction
• distributed generation
• distribution system
• dynamic voltage regulator
• voltage sag