Grid synchronization of DC energy storage using Voltage Source Inverter with ZCD and PLL techniques

To increase the penetration of renewable energy sources, a proper energy storage is required. In this context, there is a growing concern about the use of energy storage for overcoming the intermittency of renewable energy sources as well as in demand side management. In order to accomplish grid synchronization of energy storage, proper power conditioning devices are required. This paper analyses single phase grid synchronization of DC energy storage using MATLAB Simulink® environment. The considered power conditioning device is a Voltage Source Inverter (VSI), which is controlled using two methods called (i) traditional Zero Crossing Detection (ZCD) technique and (ii) the phase detector based Phase Locked Loop (PLL) technique. This work provides a comparative study of these two techniques with power quality/total harmonic distortions using low pas filter configuration.