Novel control method for compensation of voltage sags and swells using dynamic voltage restorer

摘要

Dominance of the output power delivered from the utilities has become a major concern of the modern industries for the last decade. The rise of voltage-sensitive load equipment has made industrial processes much more susceptible to deprivation in the quality of power supply. Voltage variations, often in the form of voltage sags and swells, can cause rigorous process disturbances and result in significant economic loss. The custom power devices which uses the power electronic devices, is one of the method by which power quality problems might be compensate. Among the numerous norm power devices, the dynamic voltage restorer (DVR) for use in distribution systems is a recent innovation. The mitigation capability of a DVR depends initially on the maximum voltage injection ability and within the restorer the amount of stored energy existing. In this paper a phase advanced multi-loop control scheme is used to increase the voltage renovation property of the device. Using this novel method it can be shown that the disturbances occurred in the system can be corrected with less amount of storage energy. Modeling of proposed method is implemented in MATLAB SOFTWARE.