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A hybrid active filter compensation device for three-phase power grid and its control method

A three-phase power grid and filter device technology, applied in active power filtering, AC network to reduce harmonics/ripples, etc., can solve problems such as harmonic control failures and power grid losses

Active Publication Date: 2018-11-23
STATE GRID SHANDONG ELECTRIC POWER CO WUDI COUNTY POWER SUPPLY CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The common point of these methods is that they have a high degree of intelligence, but it is not necessarily an advantage at the same time, because in practical applications, it is found that algorithms with high intelligence often have high requirements for computing hardware, and hardware errors or failures often lead to harmonics. The failure of wave governance caused immeasurable losses to the power grid

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  • A hybrid active filter compensation device for three-phase power grid and its control method
  • A hybrid active filter compensation device for three-phase power grid and its control method

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Embodiment 1

[0036] A hybrid active filter compensation device for a three-phase power grid, comprising an A-phase passive compensation circuit, a B-phase passive compensation circuit, a C-phase passive compensation circuit, a three-phase transformer (T1) and an active filter device; The first end of the A-phase passive compensation circuit is connected to the A-phase branch of the three-phase grid, and the first end of the B-phase passive compensation circuit is connected to the B-phase branch of the three-phase grid and the C-phase passive compensation circuit The first end of the first end is connected to the C-phase branch of the three-phase grid, the low-order resonant circuit includes a three-phase branch, the second end of the A-phase passive compensation circuit is connected to the A-phase branch of the low-order resonant circuit, The second end of the B-phase passive compensation circuit is connected to the B-phase branch of the low-order resonant circuit and the second end of the ...

Embodiment 2

[0058] A hybrid active filter compensation device for a three-phase power grid, comprising an A-phase passive compensation circuit, a B-phase passive compensation circuit, a C-phase passive compensation circuit, a three-phase transformer (T1) and an active filter device; The first end of the A-phase passive compensation circuit is connected to the A-phase branch of the three-phase grid, and the first end of the B-phase passive compensation circuit is connected to the B-phase branch of the three-phase grid and the C-phase passive compensation circuit The first end of the first end is connected to the C-phase branch of the three-phase grid, the low-order resonant circuit includes a three-phase branch, the second end of the A-phase passive compensation circuit is connected to the A-phase branch of the low-order resonant circuit, The second end of the B-phase passive compensation circuit is connected to the B-phase branch of the low-order resonant circuit and the second end of the ...

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Abstract

The invention discloses a hybrid active filtering compensation apparatus for a three-phase power grid. Harmonic waves of the three-phase power grid are inhibited through combination of an APF and a passive filtering mode, and by use of harmonic historical data of the three-phase power grid, harmonic predication is carried out and special points are preprocessed.

Description

technical field [0001] The invention relates to the technical field of power distribution engineering in a power system, in particular to a hybrid active filter compensation device for a three-phase power grid and a control method thereof. Background technique [0002] With the development of the power industry, on the one hand, many users have put forward more and more requirements for power quality, and on the other hand, there are more and more loads affecting power quality in the distribution network, so the problem of power quality has become increasingly prominent. For example, with the rapid development of power electronics technology, nonlinear loads, asymmetric loads, and impact loads such as electric arc furnaces, electric locomotives, rolling mills, and large-capacity power electronic converters in the power grid continue to increase. The current rises sharply. Some new power electronic equipment, such as switching power supply, precision flat welding machine, et...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J3/01
CPCH02J3/01Y02E40/20
Inventor 李涛郭建国张健吴锋刘军李玉谦李云鹏巨磊吴林庆孟强邱万里高伟李德生马飞飞邱午延张传祥
Owner STATE GRID SHANDONG ELECTRIC POWER CO WUDI COUNTY POWER SUPPLY CO