Terminal sliding mode control method for active power filter

A technology of power filter and terminal sliding mode, which is applied in the direction of active power filter, electrical components, circuit devices, etc. Wave compensation performance is limited and other issues

Active Publication Date: 2019-09-24
HOHAI UNIV CHANGZHOU
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Problems solved by technology

A large part of the harmonic compensation performance of the active power filter is limited by the control method, and some existing control methods cannot maximize the advantages of the active power filter
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  • Terminal sliding mode control method for active power filter
  • Terminal sliding mode control method for active power filter
  • Terminal sliding mode control method for active power filter

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Embodiment Construction

[0064] The present invention will be further described below with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention, and cannot be used to limit the protection scope of the present invention.

[0065] figure 1 This is the principle diagram of the terminal sliding mode controller based on the double hidden layer recurrent neural network of the present invention. The principle diagram is intended to illustrate: the harmonic current is detected from the load current as the reference signal r, and the switching control item is designed through the terminal sliding mode surface. , the purpose of this is to ensure the robustness of the system, and at the same time use the double hidden layer recurrent neural network to approximate the equivalent control term, the designed controller gives the active power filter model, and outputs a harmonic compensation model x, Negative feedba...

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Abstract

The invention discloses a terminal sliding mode control method for an active power filter, and the method comprises the following steps: S1, establishing a single-phase active power filter mathematical model, defining a state variable i as x, and obtaining an expression of a second derivative of x; S2, defining a tracking error and a first derivative thereof, defining a terminal sliding mode surface to obtain an equivalent control item, then defining a switching control item, and adding the equivalent control item and the switching control item to obtain a terminal sliding mode controller; S3, approximating the equivalent control item by using a double-hidden-layer recurrent neural network. According to the invention, the method can maintain the stability of an original controller, can simplify the control law, can achieve the better control precision, effectively reduces the distortion rate of power grid current, and improves the active power filter compensation effect.

Description

technical field [0001] The invention particularly relates to a terminal sliding mode control method of an active power filter, which belongs to the technical field of intelligent control. Background technique [0002] At present, the development of power electronic technology has brought great convenience to industrial production and personal life, but it also has great negative effects. wave, the grid circuit is no longer a standard sine wave. The existence of harmonic currents often affects the quality of the power grid, causing various circuit problems, and even fires in severe cases. Therefore, how to suppress harmonic currents is a research hotspot in today's power grid system. [0003] The common harmonic suppression method is passive filter, which has become the most widely used harmonic compensation method in the industrial field due to its convenient installation and low cost. But the passive filter can only compensate the harmonic current of a specific harmonic, ...

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Application Information

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IPC IPC(8): H02J3/18H02J3/01
CPCH02J3/1842H02J3/01Y02E40/20
Inventor 陈云费峻涛陈放
Owner HOHAI UNIV CHANGZHOU
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