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Active power filter control method based on adaptive dynamic programming

A power filter and dynamic programming technology, applied in active power filtering, circuit devices, AC network circuits, etc., can solve problems such as reducing work efficiency and increasing computing work.

Pending Publication Date: 2021-08-24
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method also needs to judge whether the model satisfies the condition of feedback linearization, resulting in a lot of tedious calculation work and reduced work efficiency.

Method used

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  • Active power filter control method based on adaptive dynamic programming
  • Active power filter control method based on adaptive dynamic programming
  • Active power filter control method based on adaptive dynamic programming

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Embodiment Construction

[0033] The embodiments will be described in detail hereinafter, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, the same numerals in different drawings refer to the same or similar elements unless otherwise indicated. The implementations described in the following examples do not represent all implementations consistent with this application. These are merely examples of systems and methods consistent with aspects of the present application as recited in the claims.

[0034] see figure 1 , the application provides a method for controlling active power filters based on adaptive dynamic programming, including:

[0035] S100: Acquiring the reference value of the harmonic current of the grid system to be compensated;

[0036] see figure 2 , is a harmonic and reactive current detection block diagram in some embodiments, if the power grid system does not need to compensate reactive current, the ...

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Abstract

The invention provides an active power filter control method based on self-adaptive dynamic programming. The method comprises the steps: acquiring a power grid system harmonic current reference value needing to be compensated; according to the Kirchhoff's law of voltage and d-q coordinate transformation, establishing a space state equation of the three-phase parallel active power filter under a d-q coordinate system, and converting the space state equation into an affine nonlinear model; acquiring a tracking error e and an expected trajectory xd according to the harmonic current reference value and the harmonic current actual value in the affine nonlinear model; obtaining a state equation of the power grid expansion system according to the tracking error e and the expected trajectory xd; setting a performance index function, and obtaining a corresponding Hamilton-Jacobian-Bellman equation; and solving the Hamilton-Jacobi-Bellman equation to obtain an optimal performance index function and an optimal tracking control strategy.

Description

technical field [0001] The present application relates to the technical field of active power filter control, and in particular to an active power filter control method based on adaptive dynamic programming. Background technique [0002] With the wide application of non-linear loads and various power electronic devices in the power grid, a large amount of harmonics and reactive currents are injected into the power grid, causing great damage to the power quality, causing serious pollution to the power grid environment, and affecting the power grid. The normal use of the equipment may even cause safety problems. In order to reduce the harmonics and reactive power compensation current in the power grid, a reactive power compensation device and an Active Power Filter (APF for short) can be used to compensate the harmonics and reactive power components of the power grid current. However, the reactive power compensation device can only compensate fixed harmonic components, so it ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/01H02J3/50
CPCH02J3/01H02J3/50H02J2203/20Y02E40/20
Inventor 覃日升姜訸郭成徐志段锐敏
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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