A power conversion system for providing power to an electrical grid comprising: a boost converter coupled to a photovoltaic array and configured to control a PV array voltage; an inverter coupled to the boost converter by a DC bus and configured to convert a DC bus voltage into AC voltage or current to be provided to the electrical grid; a PV voltage measurement device configured to measure the PV voltage level; a DC bus voltage measurement device for providing the system controller with a DC bus voltage signal corresponding to a measured DC bus voltage; and a system controller configured to control operation of the boost converter and the inverter during normal operation and in response to at least one of a low voltage ride through (LVRT) grid event and a zero voltage ride through (ZVRT) grid event, wherein in response to at least one of an LVRT event and a ZVRT event the system controller is configured to: determine a reduced power operating point; and provide a reduced power operating point signal corresponding to the reduced power operating point to the boost converter, which in response to the reduced power operating point signal is configured to adjust the PV array voltage; characterized in that the system controller is further configured to: detect if the measured DC bus voltage drops below a DC bus minimum voltage reference and then control the boost converter based on an under-voltage error signal, which corresponds to the difference between the measured DC bus voltage and the DC bus minimum voltage reference, to increase the DC bus voltage. a boost converter coupled to a photovoltaic array and configured to control a PV array voltage; an inverter coupled to the boost converter by a DC bus and configured to convert a DC bus voltage into AC voltage or current to be provided to the electrical grid; a PV voltage measurement device configured to measure the PV voltage level; a DC bus voltage measurement device for providing the system controller with a DC bus voltage signal corresponding to a measured DC bus voltage; and a system controller configured to control operation of the boost converter and the inverter during normal operation and in response to at least one of a low voltage ride through (LVRT) grid event and a zero voltage ride through (ZVRT) grid event, wherein in response to at least one of an LVRT event and a ZVRT event the system controller is configured to: determine a reduced power operating point; and provide a reduced power operating point signal corresponding to the reduced power operating point to the boost converter, which in response to the reduced power operating point signal is configured to adjust the PV array voltage; determine a reduced power operating point; and provide a reduced power operating point signal corresponding to the reduced power operating point to the boost converter, which in response to the reduced power operating point signal is configured to adjust the PV array voltage; characterized in that the system controller is further configured to: detect if the measured DC bus voltage drops below a DC bus minimum voltage reference and then control the boost converter based on an under-voltage error signal, which corresponds to the difference between the measured DC bus voltage and the DC bus minimum voltage reference, to increase the DC bus voltage. detect if the measured DC bus voltage drops below a DC bus minimum voltage reference and then control the boost converter based on an under-voltage error signal, which corresponds to the difference between the measured DC bus voltage and the DC bus minimum voltage reference, to increase the DC bus voltage.