A power conversion system, comprising: a DC bus for receiving direct current power; a line side converter coupled to the DC bus for converting the DC power on the DC bus to alternating current power; and a voltage source controller for providing control signals to the line side converter to enable the line side converter to regulate the AC power, the voltage source controller comprising: an active power regulator adapted to generate an internal frequency command signal based on a power command signal and a power feedback signal, and to generate a phase angle command signal by integrating the internal frequency command signal; a reactive power regulator adapted to generate a voltage magnitude command signal based on a reactive power command signal and a reactive power feedback signal; characterized by further comprising: a current limiter adapted to, during a transient event, limit the phase angle command signal and the voltage magnitude command signal based at least in part on an electrical current threshold; a signal generator adapted to generate the control signals for the line side converter based on the limited phase angle command signal and the limited voltage magnitude command signal from the current limiter; a voltage limiter adapted to generate a frequency correction signal for the internal frequency command signal or phase angle correction signal for correction of the phase angle command signal if a DC bus voltage feedback signal is higher than an upper limit voltage value or lower than a lower limit voltage value during the transient event. a DC bus for receiving direct current power; a line side converter coupled to the DC bus for converting the DC power on the DC bus to alternating current power; and a voltage source controller for providing control signals to the line side converter to enable the line side converter to regulate the AC power, the voltage source controller comprising: an active power regulator adapted to generate an internal frequency command signal based on a power command signal and a power feedback signal, and to generate a phase angle command signal by integrating the internal frequency command signal; a reactive power regulator adapted to generate a voltage magnitude command signal based on a reactive power command signal and a reactive power feedback signal; characterized by further comprising: a current limiter adapted to, during a transient event, limit the phase angle command signal and the voltage magnitude command signal based at least in part on an electrical current threshold; a signal generator adapted to generate the control signals for the line side converter based on the limited phase angle command signal and the limited voltage magnitude command signal from the current limiter; a voltage limiter adapted to generate a frequency correction signal for the internal frequency command signal or phase angle correction signal for correction of the phase angle command signal if a DC bus voltage feedback signal is higher than an upper limit voltage value or lower than a lower limit voltage value during the transient event. an active power regulator adapted to generate an internal frequency command signal based on a power command signal and a power feedback signal, and to generate a phase angle command signal by integrating the internal frequency command signal; a reactive power regulator adapted to generate a voltage magnitude command signal based on a reactive power command signal and a reactive power feedback signal; characterized by further comprising: a current limiter adapted to, during a transient event, limit the phase angle command signal and the voltage magnitude command signal based at least in part on an electrical current threshold; a signal generator adapted to generate the control signals for the line side converter based on the limited phase angle command signal and the limited voltage magnitude command signal from the current limiter; a voltage limiter adapted to generate a frequency correction signal for the internal frequency command signal or phase angle correction signal for correction of the phase angle command signal if a DC bus voltage feedback signal is higher than an upper limit voltage value or lower than a lower limit voltage value during the transient event. a current limiter adapted to, during a transient event, limit the phase angle command signal and the voltage magnitude command signal based at least in part on an electrical current threshold; a signal generator adapted to generate the control signals for the line side converter based on the limited phase angle command signal and the limited voltage magnitude command signal from the current limiter; a voltage limiter adapted to generate a frequency correction signal for the internal frequency command signal or phase angle correction signal for correction of the phase angle command signal if a DC bus voltage feedback signal is higher than an upper limit voltage value or lower than a lower limit voltage value during the transient event.