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

Abstract

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.

Description

technical field [0001] The invention relates to a high-voltage intelligent flexible transmission series compensation device for a micro-grid and a large power grid and a control method thereof, which belongs to a device for intelligent flexible transmission series compensation (Smart Flexible Transmission Series Compensation Equipment) ——SFTSCE) and its control method. Background technique [0002] At present, the micro-grid composed of new energy and the large power grid are connected at high voltage to form a strong smart grid, which has been considered by domestic and foreign experts as an inevitable development trend of the power system; The micro-grid composed of a large number of wind power, solar energy and other renewable energy sources in Northwest my country is connected to the high-voltage part of the large power grid (35KV and above) due to defects in control technology, resulting in bottlenecks in power transmission, unified power flow, voltage fluctuations, Harm...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problems existing in the existing parallel compensation control device in solving the unified power flow and weak low-voltage ride-through ability, and provide a micro-controller that can solve the problem of unified power flow in electric power transmission and weak low-voltage ride-through ability. High-voltage intelligent flexible transmission series compensation device for power grid and large power grid and its control method

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