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Inversion Control Method of Active Power Filter

A power filter, inversion control technology, applied in general control systems, control/regulation systems, instruments, etc., can solve problems that have not yet been applied

Inactive Publication Date: 2016-08-24
HOHAI UNIV CHANGZHOU
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Problems solved by technology

It can be seen that the inversion control simplifies the design of the control law, is suitable for the strong nonlinear characteristics of the active power filter, and can make the entire closed-loop system meet the expected dynamic and static performance indicators by combining with the Lyapunov theory. However, so far , although the existing patents all study the control of active power filters from different aspects, but have not yet applied the inversion control method and based on the Lyapunov analysis method to control and dynamically compensate the active power filter

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  • Inversion Control Method of Active Power Filter
  • Inversion Control Method of Active Power Filter
  • Inversion Control Method of Active Power Filter

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Embodiment Construction

[0053] The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:

[0054] (1) Establishing the mathematical model of the active power filter

[0055] The parallel voltage type active power filter is used to eliminate the harmonic pollution caused by the three-phase diode bridge rectifier load. Its main circuit structure is as figure 1 .

[0056] The basic working principle of the active power filter is that by detecting the voltage and current of the compensation object, the command signal of the compensation current is calculated by the command current operation circuit, and the signal is amplified by the compensation current generation circuit to obtain the compensation current. It offsets with the harmonics and reactive currents to be compensated in the load current, and finally obtains the desired power supply current.

[0057] According to circuit theory and Kirchhoff's theorem, the following three different f...

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Abstract

The invention discloses a backstepping control method of an active power filter, relates to controllers of the active power filter, and particularly belongs to the application of a backstepping control method to active power filter control. A backstepping controller of the backstepping control method of the active power filter can guarantee a closed loop system to be uniform and ultimately bounded and enables a compensation current to track an instruction current in real time to achieve the aim of harmonic elimination; stability analysis is performed on the system on the basis of the Lyapunov theory, so that the realization of the global stability is guaranteed. The backstepping controller of the backstepping control method of the active power filter improves the control performance of the system and has good dynamic performance and steady accuracy.

Description

technical field [0001] The patent of the present invention relates to an inversion control method of an active power filter, which belongs to the technical field of active power filter. Background technique [0002] With the increasing number of nonlinear loads in the power system, how to suppress the harmonics of the power system caused by these loads has become a difficult problem for electrical engineers. Harmonic pollution causes severe distortion of voltage and current waveforms in the power system, which not only leads to extremely low power factor, but also endangers the stable operation of electrical equipment and communication systems. Currently, external filters are mainly used for treatment. Filters are divided into passive filters and active filters. Due to the defects of passive filters that can only compensate for specific harmonics, the current treatment of power problems is mainly focused on active filters. Active filters can track and compensate harmonics ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B17/02
Inventor 侯世玺费峻涛
Owner HOHAI UNIV CHANGZHOU
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