Micro power grid and large power grid high-voltage intelligent flexible transmission serial connection compensation device and control method thereof

The invention relates to a micro power grid and large power grid high-voltage intelligent flexible transmission serial connection compensation device and a control method thereof. The device and the method mainly aim to solve the technical problems of unified tide and poor low-voltage through and bearing capability of an existing parallel connection compensation control device. The technical scheme of the invention is that the micro power grid and large power grid high-voltage intelligent flexible transmission serial connection compensation device comprises a micro power grid side hybrid active power dynamic filter circuit, a micro power grid side parameter detection circuit, an integrated gate commutated thyristor (IGCT) five-level switch topology circuit, an IGCT switch driving circuit, an intelligent flexible transmission serial connection compensation device digital signal processor (DSP) control circuit and the like, wherein a serial connection compensation capacitor circuit of a two-way thyristor switch control on a micro power grid side and a large power grid side is also arranged. The control method comprises the following steps that active power adjusting control quantity Delta P(t)=Delta Ps(t)-Delta Pr(t) and reactive power adjusting control quantity Delta Q(t)=Delta Qs(t)-Delta Qr(t) are formed according to the parameter information which is detected and obtained from the micro power grid side and the large power grid side, so that the control to flexible active power Ps(t) and flexible reactive power Qs(t) is realized.