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An intelligent dynamic hybrid reactive power compensation system and its control method

A hybrid reactive power compensation, intelligent dynamic technology, applied in the direction of reactive power adjustment/elimination/compensation, flexible AC transmission system, etc., can solve the problems of SVG implementation difficulties, high engineering cost, etc., achieve high cost performance, improve system output, and suppress Flicker and drop effects

Active Publication Date: 2017-03-08
JIANGSU FANGCHENG ELECTRIC SCI & TECHCO
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Problems solved by technology

However, because SVG is limited by the capacity of components, it is difficult to implement large-capacity SVG and the project cost is high.

Method used

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  • An intelligent dynamic hybrid reactive power compensation system and its control method
  • An intelligent dynamic hybrid reactive power compensation system and its control method
  • An intelligent dynamic hybrid reactive power compensation system and its control method

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Embodiment Construction

[0030] All features disclosed in this specification, or steps in all methods or processes disclosed, may be combined in any manner, except for mutually exclusive features and / or steps.

[0031] Any feature disclosed in this specification (including any appended claims, abstract and drawings), unless expressly stated otherwise, may be replaced by alternative features which are equivalent or serve a similar purpose. That is, unless expressly stated otherwise, each feature is one example only of a series of equivalent or similar features.

[0032] An intelligent dynamic hybrid reactive power compensation system, its main circuit structure is as follows figure 1 As shown, it is used to adjust the reactive power compensation of the power grid. The compensation system includes a main circuit and a controller. The main circuit includes a compensation branch, and the compensation branch includes an SVC compensation branch and an SVG compensation branch. The SVC compensation branch an...

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Abstract

The invention relates to a novel hybrid intelligent dynamic reactive power compensation system and a control method thereof which are used to conduct reactive power compensation adjustment on a grid. Through efficient coordination and control of a SVC (Static Var Compensator) compensation branch and a SVG (Static Var Generator) compensation branch, the intelligent dynamic reactive power compensation system therefore has the advantages of having the capability of accurate compensation and transient response, realizing continuous and smooth adjustment from capacitance to inductance within the scope of capacity, effectively solving reactive mutation problem caused by impact load, effectively suppressing grid voltage flicker and drop caused by heavy load start-stop situation or fault conditions and improving system output. Meanwhile, with the SVC compensation branch and the SVG compensation branch combined, the reactive power compensation system is optimized in terms of compensation characteristics, cost, reliability and the like, thereby being more cost-effective.

Description

technical field [0001] The invention relates to an intelligent dynamic hybrid reactive power compensation system and a control method thereof, belonging to the technical field of power electronics. Background technique [0002] In modern industrial systems, such as AC electric arc furnaces, electrified railways, and large rolling mills, etc., are dynamically changing nonlinear loads. This type of load is characterized by rapid changes in active power and reactive power over time. Due to its nonlinear and unbalanced power consumption characteristics, the voltage waveform of the power supply grid is distorted, causing voltage fluctuations, flicker and three-phase imbalance. Balance, and even cause system frequency fluctuations, and inject a large number of harmonics into the system, which poses a serious threat to the power quality of the grid. [0003] Static var compensation device (SVC for short) is a device for quickly adjusting reactive power, and its typical representat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/18
CPCY02E40/10
Inventor 张建兴包虎平
Owner JIANGSU FANGCHENG ELECTRIC SCI & TECHCO
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