A REAL TIME VOLTAGE CONTROL APPARATUS CAPABLE OF SAG VOLTAGE AND PHASE COMPENSATION AND A REAL TIME VOLTAGE CONTROL METHOD THEREOF

摘要

One real-time voltage control device and its Mitigation options are provided to stable power supply and load to one, pass through voltage and phase retardation of the compensation simultaneously in the voltage decline of unified power system. One input voltage is mutually worth (VinSinDo) with one input voltage width of reference voltage generating unit (1) output and is delayed by by the stage therein of an amplitude one for the increase input voltage realized with the reference voltage amplitude and phase value (VrefCosDo) that a sine value of an arbitrary degree delayed phase and the amplitude (Vref) by increasing reference voltage are realized, its cosine value with delayed phase, as one 1 x, 1 matrixes. One forward transform unit (2) is connected to input voltage and an output stage of reference voltage generating unit and output hybrid performance number (Vp, Vq) and is mutually worth 1 x, 1 matrixes and phase value with reference voltage amplitude by increasing input voltage width, has a cosine value in the normal reference stage that 2 x, 2 forward conversion matrixes and commercial ac power source are made of a sine value. A pair of of error operation unit (3a, 3b) is connected to an output stage of forward transform unit and exports a difference between the mixed type performance number of forward transform unit and reference voltage and the difference between mixed type performance number and zero. A pair of of PI (proportional-integral derivative controller) unit (4a, 4b) is respectively connected to the output stage of a pair of of error operation unit to execute the PI of the output valve of a pair of of error operation unit. One change of scale (5) backward is connected to the output stage by the output valve that increases a pair of of PI unit both a pair of of PI unit of offset voltage and phase retardation and output final output voltage, the cosine value in the normal reference stage that 2 x, 2 inverse change matrixes and commercial ac power source are made of sine value with one.