Overcoming limitation of Electric Spring

Electric Spring (ES) is an emerging technology which has been used previously for stabilizing power grid while contributing to the load shedding through the sacrificing non-critical load. This young ES has some limits and drawbacks which should be more nurtured to make it more mature. One of these weaknesses is no protection on the non-critical load which is series with the ES. It is true that ES has to keep the voltage of critical loads in the nominal value, but it is also true that the voltage of non-critical load still has some limitations which should be taken into consideration. This paper proposes new control strategies to protect the non-critical load against large voltage fluctuation without losing effectiveness of ES. In order to prove validity of this scheme a typical power grid is adopted for simulations via MTLAB/SIMULINK software.