Distributed power quality conditioner and method for controlling same

Abstract

The invention discloses a distributed power quality conditioner and a method for controlling the same. The distributed power quality conditioner comprises one or more series compensation devices and parallel compensation devices, wherein each of the series compensation devices and the parallel compensation devices comprises a central controller; the series compensation devices and the parallel compensation devices do not share a direct current bus; and when the series compensation devices and the parallel compensation devices are used together, a management center is configured for acquiring the voltage of an electric network and load current information to determine the failure type of the electric network, and coordinately operating all series compensation devices and all parallel compensation devices.

Description

technical field [0001] The invention relates to a power quality regulator, in particular to a distributed power quality regulator based on a series compensation device and a parallel compensation device and a control method thereof. Background technique [0002] With the continuous increase of nonlinear loads and impact loads in the power system, especially the wide application of power electronic conversion devices, the harmonic distortion of the power grid is becoming more and more serious. At the same time, there are often three-phase unbalanced and harmonic interference phenomena in the grid voltage. On the other hand, with the popularity of various complex and sophisticated devices (such as computers) that require high power quality, people put forward higher and higher requirements for power quality, and power quality devices and control technologies have become current hot spots question. [0003] Such as figure 1 As shown, the traditional Unified Power Quality Con...

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Problems solved by technology

[0006] The purpose of the present invention is to overcome the shortcomings of the existing traditional unified power quality conditioner such as high cost, complicated control, inflexible installation location and capacity configuration, etc., based on the hierarchical management of different power quality and the design of high-quality power parks under the background of smart grids. , to provide a decentralized power quality regulator, the invention can reduce system cost, control various power quality problems in the distribution network, and the configuration is more flexible and reliable

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