System and method for controlling grid-connected system of distributed generation using integral state feedback controller

摘要

The present invention relates to a control system for a distributed power system linkage device using an integrating state feedback controller, and a method therefor. According to the present invention, the control system for a distributed power system linkage device using an integrating state feedback controller comprises: a state observer which individually receives voltages and currents of a system-side individually measured by a voltage sensor and a current sensor, and individually estimates an inverter-side current of the distributed power system linkage device and a capacitor voltage of an LCL filter on the basis of the received voltages and currents; an integrating state feedback controller which generates q axis and d axis reference voltages for controlling the inverter of the distributed power system linkage device by using state equations after receiving the inverter-side current and the capacitor voltage of the LCL filter estimated by the state observer and receiving the system-side current measured by the current sensor; and a space vector pulse width modulator which receives the q axis and d-axis reference voltages generated by the integrating state feedback controller so as to perform pulse width modulation processing and outputs a signal for controlling a plurality of semiconductor switching elements in the inverter to the inverter side. According to the present invention, the complexity of the system is simplified.