SYSTEM AND METHOD FOR CONTROLLING FACTSFLEXIBLE AC TRANSMISSION SYSTEM THAT SUPPLY OR ABSORB REACTIVE POWER

摘要

The present invention is to control a flexible transmission device that supplies or absorbs reactive power to a grid, and the flexible transmission device control system according to an embodiment of the present invention includes, for a grid voltage applied to a grid, Based on a preset upper and lower limit voltage and a range of Q values that can be provided by the flexible transmission device, a dead band generator that generates a dead band region, and an output value Q of the reactive current corresponding to the grid voltage A slope generator for generating a slope of a reference voltage curve to be determined, a first slope having a predetermined slope, the deadband region, and a plurality of deadband regions based on a preset Q reference value. At least one partial slope is generated so that different output values Q correspond to either an upper limit voltage or a lower limit voltage of the deadband region, and the first slope or the first slope or the first slope based on whether the system voltage is outside or within the deadband region. And a controller for controlling the flexible transmission device to output a reactive current according to any one of the at least one partial slope.