A control method for a parallel converter system, the parallel converter system comprising at least two parallel voltage source converters connected in parallel to a same AC bus or to connected AC buses, at least one of the converters operating in an island control mode, and the control method comprising the following steps: calculating a system voltage phase reference value θ ref according to a frequency reference value F ref; acquiring a bus voltage across the AC bus; processing the acquired bus voltage to obtain an active current reference value I dref and a wattless current reference value I qref which are determined by an effective bus voltage reference value and the system voltage phase reference value θ ref; outputting the active current reference value I dref, the wattless current reference value I qref, and the system voltage phase reference value θ ref, served as a converter control signal, to each converter in said island control mode; and controlling an active current of any converter in the island control mode to follow the active current reference value I dref and controlling a wattless current of any converter in the island control mode to follow the wattless current reference value I qref according to the received control signal; wherein the converter in the island control mode aims to control an amplitude and frequency of the voltage of the AC bus; characterized in that when active power of any converter needs to be limited, the active current reference value is limited to be less than or equal to an active current limit value I dlim; and when wattless power of any converter needs to be limited, the wattless current reference value is limited to be less than or equal to a wattless current limit value I qlim; the active current limit value I dlim is generated through the following solution: the active current limit value I dlim is generated by modulating a deviation between an active power limit value and actual active power of the converter through a PI controller; the wattless current limit value I qlim is generated through the following solution: the wattless current limit value I qlim is generated by modulating a deviation between a wattless power limit value and actual wattless power of the converter through a PI controller. calculating a system voltage phase reference value θ ref according to a frequency reference value F ref; acquiring a bus voltage across the AC bus; processing the acquired bus voltage to obtain an active current reference value I dref and a wattless current reference value I qref which are determined by an effective bus voltage reference value and the system voltage phase reference value θ ref; outputting the active current reference value I dref, the wattless current reference value I qref, and the system voltage phase reference value θ ref, served as a converter control signal, to each converter in said island control mode; and controlling an active current of any converter in the island control mode to follow the active current reference value I dref and controlling a wattless current of any converter in the island control mode to follow the wattless current reference value I qref according to the received control signal; wherein the converter in the island control mode aims to control an amplitude and frequency of the voltage of the AC bus; characterized in that when active power of any converter needs to be limited, the active current reference value is limited to be less than or equal to an active current limit value I dlim; and when wattless power of any converter needs to be limited, the wattless current reference value is limited to be less than or equal to a wattless current limit value I qlim; the active current limit value I dlim is generated through the following solution: the active current limit value I dlim is generated by modulating a deviation between an active power limit value and actual active power of the converter through a PI controller; the wattless current limit value I qlim is generated through the following solution: the wattless current limit value I qlim is generated by modulating a deviation between a wattless power limit value and actual wattless power of the converter through a PI controller. wherein the converter in the island control mode aims to control an amplitude and frequency of the voltage of the AC bus; characterized in that when active power of any converter needs to be limited, the active current reference value is limited to be less than or equal to an active current limit value I dlim; and when wattless power of any converter needs to be limited, the wattless current reference value is limited to be less than or equal to a wattless current limit value I qlim; the active current limit value I dlim is generated through the following solution: the active current limit value I dlim is generated by modulating a deviation between an active power limit value and actual active power of the converter through a PI controller; the wattless current limit value I qlim is generated through the following solution: the wattless current limit value I qlim is generated by modulating a deviation between a wattless power limit value and actual wattless power of the converter through a PI controller.