Hybrid electric power filter

A power filter and hybrid power technology, applied in active power filtering, harmonic reduction devices, AC networks to reduce harmonics/ripples, etc.

Inactive Publication Date: 2013-10-23
TAIYUAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The structure of the above-mentioned disclosed technology is more complicated, the cost is higher, and the harmonic times filtered out are only specific several times such as 5, 7, and 11 times. Subharmonics have no effect

Method used

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Embodiment Construction

[0017] figure 1 As shown, the present invention is composed of a power supply, an active power filter, a single-stage LC passive filter and a nonlinear load, wherein the power supply is connected in parallel with the active power filter and the single-stage LC passive filter and then connected with a non-linear Linear load connection.

[0018] The active power filter is composed of a signal detection and conditioning circuit, a DSP2812 computing module, an IPM drive circuit and an IPM power module; the output of the signal detection and conditioning circuit is connected to the input of the DSP2812 computing module, and the output of the DSP2812 computing module is connected to the IPM driving circuit The input of the IPM drive circuit is connected to the input of the IPM power module.

[0019] The single-stage LC passive filter is composed of 3 groups of inductors, capacitors and resistors, wherein the 3 groups of inductors are connected in series in the main circuit, one en...

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Abstract

The invention discloses a hybrid electric power filter, which is characterized by consisting of a power supply, an active electric power filter, a single-level LC passive filter and a non-linear load, wherein the power supply is connected with the active electric power filter and the single-level LC passive filter in parallel and then is connected with the non-linear load in series; the LC passive filter takes the effect of harmonic wave and reactive compensation; the object compensated by the active electric power filter is system current filtered by the passive filter. Harmonic content in the system current is greatly reduced, so that the capability requirement on the active electric power filter is not high, the active filer can improve the filtering characteristic of the LC passive filter, and the defects that the passive filter is easily affected by power grid impedance and is easily syntonic with the power grid impedance are overcome. The hybrid electric power filter is not easily affected by the power grid impedance, the structure is simple, and the capacity requirement on the active filter is very small.

Description

technical field [0001] The invention belongs to the field of electric power system power supply, is mainly used for harmonic control and reactive power compensation, and specifically relates to a hybrid power filter. Background technique [0002] As one of the most widely used secondary energy sources in today's society, electric energy is used in a staggering amount. As electric energy is widely used in various fields, some power quality problems have emerged one after another, among which the problem of harmonic pollution in power grids is particularly prominent. The application of a large number of nonlinear loads and power electronic devices seriously distorts the voltage and current waveforms of the power system, seriously threatens the normal operation of the power grid, and even causes immeasurable economic losses. Therefore, the control of electric energy pollution is imminent. [0003] The current methods for harmonic control mainly include passive power filters, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/40Y02E40/20
Inventor 李岚康增尚曹效霞
Owner TAIYUAN UNIV OF TECH
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