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Adaptive control method of single-phase shunt active power filter

A technology of self-adaptive control and self-adaptive controller, applied in active power filtering, harmonic reduction devices, AC networks to reduce harmonics/ripples, etc., can solve the problem of less research on active filters

Inactive Publication Date: 2012-12-19
HOHAI UNIV CHANGZHOU
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Problems solved by technology

[0004] At present, there are many studies on active filters controlled by three-phase electric compensation, but there are relatively few studies on active filters controlled by single-phase electric compensation, and there is no adaptive control algorithm for active filters in China. experiments and products

Method used

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  • Adaptive control method of single-phase shunt active power filter
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  • Adaptive control method of single-phase shunt active power filter

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Embodiment Construction

[0055] 1. Selection of actual parameters

[0056] Based on the approximate linear dynamic model of SAPF, using the model reference adaptive theory to control, the adaptive law for controlling SAPF tracking reference model is established, and an adaptive controller is designed, such as figure 1 As shown, the SAPF output can compensate currents such as circuit harmonics and reactive power. At the equilibrium point (x 0 , u 0 ) near x δ =x-x 0 , u δ =u-u 0 , where x is the actual output matrix of APF, x 0 Is the balance point (a matrix composed of inductor current and DC voltage at balance), and the simulation variable x δ , u are respectively obtained by the following formula

[0057] x δ = x - x 0 u = ...

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Abstract

The invention discloses an adaptive control method of a single-phase shunt active power filter and belongs to the technology of active power filter control. An adaptive law for controlling an SAPF (shunt active power filter) following reference model is established based on an SAPF approximately-linear dynamic model and by means of control of the model reference adaptive theory, and an adaptive controller is designed to enable the SAPF to output current capable of compensating circuit harmonic, reactive power and the like. By the aid of the adaptive control method, the single-phase SAPF can be effectively controlled, harmonic current and reactive power current of nonlinear circuits are accurately and rapidly compensated, current distortion and reactive power are reduced and eliminated, and current quality of the circuits is improved. The adaptive controller enables nonlinear current distortion to be improved to be within the national standards, and the adaptive control method is of economic significance and has good market prospect.

Description

Technical field: [0001] The invention relates to a single-phase parallel active filter adaptive control technology, which belongs to the active filter control technology. Background technique: [0002] With the rapid development of the national economy and the wide application of power electronics technology, various nonlinear interference loads increase rapidly, resulting in a rapid increase in the harmonic current content in the power system, serious distortion of the current waveform, greatly reducing the power quality and increasing the line load. The power factor of the system decreases sharply, which poses a potential threat to the safety, stability and economic operation of electrical equipment, and has a great impact on the surrounding electrical environment. [0003] The design and research of active filters at home and abroad have made great progress, and a large number of products have been put into the market and achieved success. With the rapid development of t...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18
CPCY02E40/40Y02E40/22Y02E40/20
Inventor 费峻涛张生磊华民刚戴卫力
Owner HOHAI UNIV CHANGZHOU
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