Voltage fluctuation reduction in distribution grid by using electric spring.

Voltage fluctuation is a common problem in a conventional electrical distribution system that occurs when heavy loads are switched, when there is fault condition or when there is unbalanced load. Variation in voltage can pose major problems for critical loads. The focus of this work is on the intricacies of the Electric Spring's practical & control implementation for AC mains voltage control & reactive power correction. The base of "Electrical Spring" is derived from "Mechanical Spring". The Concept of "Mechanical Spring" was illustrated by British physicist Robert Hook in 1960s. To provide voltage stability for essential loads, electric spring can transmit energy fed into the feeder using a series inverter. As a result, in distributed grid-connected system, an electric spring is an excellent solution for reducing voltage swings in feeder due to switching operation as well as fault condition. The proposed work focuses on incorporating an electric spring in distributed grid-connected system to stabilize voltage variations caused by switching of different types of load & fault condition. MATLAB simulation results of voltage stability for different conditions are presented in this paper. [ABSTRACT FROM AUTHOR]