A Global Sliding Mode Control Method for Active Power Filters

A technology of power filter and control method, applied in active power filter, circuit device, AC network circuit, etc., can solve problems such as inconvenience, low robustness, system instability, etc., to speed up system response and optimize system performance , the effect of improving the learning rate and detection accuracy

Active Publication Date: 2021-07-13
HOHAI UNIV CHANGZHOU
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the robustness of adaptive control to external disturbances is very low, and it is easy to make the system unstable.
[0004] This shows that above-mentioned existing active power filter obviously still has inconvenience and defect in use, and urgently needs to be further improved
In order to solve the problems existing in the use of existing active power filters, relevant manufacturers have tried their best to find a solution, but no suitable design has been developed for a long time

Method used

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  • A Global Sliding Mode Control Method for Active Power Filters
  • A Global Sliding Mode Control Method for Active Power Filters
  • A Global Sliding Mode Control Method for Active Power Filters

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Embodiment Construction

[0087] The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

[0088] like figure 1 is the basic circuit topology diagram of the three-phase three-wire parallel voltage-type active power filter, v s1 ,v s2 ,v s3 is the grid voltage, i s1 ,i s2 ,i s3 is the supply current, i L1 ,i L2 ,i L3 is the load current, v 1 ,v 2 ,v 3 is the voltage at the common connection point, i 1 ,i 2 ,i 3 is the filter output compensation current, C is the DC side capacitance, v dc is the DC side capacitor voltage, i dc is the DC side capacitor voltage, L c is the AC side inductance, R c is the equivalent resistance.

[0089] A fully-adjustable fuzzy neural network with a double feedback structure of the present invention, although the traditional neural networ...

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Abstract

The invention discloses a global sliding mode control method for an active power filter based on a double-feedback fuzzy neural network, comprising the following steps: 1) establishing a mathematical model of the active power filter; 2) establishing an active power filter based on a double-feedback fuzzy Power filter global sliding mode controller, design control law, use it as the control input of active power filter; 3) Based on Lyapunov function theory, design adaptive law, verify the active power based on double feedback fuzzy neural network Stability of filter global sliding mode controllers. The invention can improve the compensation current tracking performance and system robustness of the active power filter system under the condition of parameter perturbation and external interference.

Description

technical field [0001] The invention relates to a control method for an active power filter, in particular to a global sliding mode control method for an active power filter based on a double-feedback fuzzy neural network. Background technique [0002] With the popularization and application of modern power electronic technology, there are more and more various power electronic devices. The working performance and service life of equipment and electrical equipment, and even endanger the safety of the power system. Currently, external filters are mainly used for treatment. Filters are divided into passive filters and active filters. Since the passive filter can only compensate specific harmonics and other defects, the current research on the control of electric energy problems mainly focuses on the active filter. The active filter can track and compensate the harmonics with changing frequency and amplitude. It can not only compensate each harmonic, but also suppress flicker...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/27H02J3/01
CPCG06F30/20H02J3/01H02J2203/20Y02E40/20
Inventor 储云迪费峻涛王欢冯治琳
Owner HOHAI UNIV CHANGZHOU
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