Chained STATCOM modularized decoupling reactive compensation device

Abstract

The invention discloses a modularized decoupling-based chained STATCOM reactive compensation device. The device comprises a chained STATCOM main circuit topology, an independent design scheme of a fundamental wave and harmonic wave compensation controller, and a DSP and FPGA-based master-slave type multi-CPU control system, wherein the chained STATCOM main circuit topology is used for realizing the reactive compensation tasks of fundamental waves and harmonic waves via an independent H bridge module by adoption of a decoupling principle; the independent design scheme in based on orthogonal characteristics of the fundamental waves and harmonic waves; and the DSP and FPGA-based master-slave type multi-CPU control system comprises a main controller which is used for realizing the acquisition and processing of signals and controlling the output of the signals and a split-phase controller which is used for completing the pulse generation and distribution. According to the device disclosed by the invention, the integrated innovation of fundamental wave and harmonic wave reactive compensation of middle-high voltage reactive compensation devices is realized, the contradiction between system capacity and switch frequency is relieved, the design and control algorithms of the controllers are simplified, the compensation effect is improved, the hardware cost is saved, and important promotion action is provided to improve the reactive compensation performance of STATCOM.

Description

technical field [0001] The invention relates to a reactive power compensation device, more specifically, it relates to a chain type STATCOM modular decoupling fundamental wave reactive power compensation and specific harmonic elimination device. Background technique [0002] With the rapid development of the power industry, a large number of nonlinear and impact loads are connected to the power grid. At the same time, nonlinear power sources such as wind power and photovoltaic power generation are being connected to the grid one after another, resulting in increasingly complex power quality problems such as voltage fluctuations, voltage dips, and harmonics. Power system Harmonic control and reactive power compensation have become a major issue in the field of power systems and have received more and more attention. Many countries have paid enough attention to this. STATCOM has been extensively studied in reactive power compensation. And began to be applied to the power syste...

AI Technical Summary

Problems solved by technology

However, in high-voltage and high-power applications, problems such as high withstand voltage of power devices, high volume cost, large current in medium-high voltage local compensation, serious heat generation, and low switching frequency of devices need to be studied and solved urgently.

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