Abstract: Power grid connected to an intermittent renewable energy source is associated with voltage and frequency fluctuations. This paper aims to use an Electric Spring (ES) in a smart way to enhance the load voltage regulation and increase the stability of the system. In the proposed model the Electric Spring is connected in series with the Non Critical Load forms a smart load. The critical load is connected in shunt with this smart load whose voltage to be maintained constant. Depending on the type of Critical Load, the phase angle between the current of Non Critical Load (Znc) and ES voltage is controlled to maintain constant bus voltage. The simulation results show the effectiveness of ES in enhancing the load voltage regulation.

Keywords: Electric Spring, smart load, load voltage regulation, stability.