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Method for active power filter self-adaption repetition and deadbeat compound control

A power filter and composite control technology, applied in active power filtering, AC network to reduce harmonics/ripples, etc., can solve the problem of not outputting immediately, but outputting after a reference period, and the compensation effect is unstable. , power grid frequency disturbance and other problems, to achieve real-time accurate harmonic current situation, reduce parameters, high output waveform quality effect

Inactive Publication Date: 2014-05-28
江苏广识电气有限公司
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Problems solved by technology

At present, domestic active power filters mostly adopt a single repetitive control strategy. Although the output waveform can be accurately tracked, the control command obtained by it is not output immediately, but is output after a delay of a reference period, such as the patent number CN201210389971. 0 (publication number: CN102882211A, public date January 16, 2013) discloses an adaptive repetitive control method for active power filters, although it solves the problem of poor compensation effect of active power filters caused by grid frequency disturbances Stability problem, but the control command it gets is not output immediately, but after a reference cycle lag, the dynamic response is slow, and the real-time performance is not strong

Method used

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  • Method for active power filter self-adaption repetition and deadbeat compound control
  • Method for active power filter self-adaption repetition and deadbeat compound control
  • Method for active power filter self-adaption repetition and deadbeat compound control

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Embodiment Construction

[0016] Below in conjunction with accompanying drawing and embodiment the present invention will be further described:

[0017] figure 1 Middle: The present invention is constructed by a voltage and current sampling circuit, a main control circuit, a driving circuit and a main circuit. The voltage and current sampling circuit is mainly to sample the grid voltage, load and inverter current through AD; the main control circuit is mainly DSP+FPGA, the driving circuit is to generate the driving signal to drive the IGBT action, and the main circuit is the three-phase inverter , through the programming of the main control circuit, the PWM wave is sent to the drive circuit to drive the IGBT of the inverter to work, so that it outputs a compensation current that is equal in magnitude to the harmonic current and opposite in direction.

[0018] figure 2 Middle: The basic principle is to convert the voltage in the grid phase-locked loop and phase-shifted Provides a standard referen...

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Abstract

The invention discloses a method for active power filter self-adaption repetition and deadbeat compound control. An active power filter is formed by a voltage and current detection circuit, a master control circuit, a drive circuit and a main circuit. By utilizing a new self-adaption harmonic detection algorithm, and applying repetition and deadbeat soft start control technology, a compensation current, of which the value is the same with that of a harmonic current and the direction is opposite with that of the harmonic current. With the method, parameter variation in a grid can be adjusted, and the system is guaranteed to have relatively-fast dynamic response speed and relatively-high output waveform quality.

Description

technical field [0001] The present invention relates to a method for controlling an active power filter, in particular to a new adaptive harmonic detection algorithm for an active power filter, and a method for repetitive and deadbeat compound control. The source power filter can suppress harmonics and compensate reactive power for the power grid, effectively improving the power quality of the power grid, and belongs to the field of power electronics intelligent control. Background technique [0002] At present, the issue of environmental protection has been paid more and more attention, and people have realized the necessity of environmental purification of power system. On the one hand, the extensive use of power electronic equipment and the continuous increase of nonlinear loads inject a large amount of harmonic and reactive current into the grid, which greatly deteriorates the power quality of the grid; on the other hand, these power electronic equipment and various load...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01
CPCY02E40/20
Inventor 杨龙月周万鹏
Owner 江苏广识电气有限公司
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