Electronic Thesis and Dissertation Repository


Master of Engineering Science


Electrical and Computer Engineering


Dr. Rajiv K. Varma


The grid integration of photovoltaic (PV) systems in distribution networks is facing challenges such as transient changes in voltage due to fluctuations in generated real power and tripping of PV systems. Smart PV inverters with functions such as dynamic reactive current injection and low voltage ride through are available to mitigate these challenges. This thesis shows that a better stable performance can be obtained if these functions are implemented using the novel patent-pending technology of PV system as a dynamic reactive power compensator (PV-STATCOM). A linearized state space model of PV-STATCOM is developed to show the benefits of PV-STATCOM controls over Smart PV inverter controls in the presence of control system interaction between dc-link voltage and point of common coupling voltage controllers. These benefits are further substantiated by comparing the performance of PV-STATCOM and Smart PV inverter to perform voltage control during system disturbances simulated by irradiance changes and faults.