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Active power filter control method

A power filter and control method technology, applied in active power filtering, electrical components, circuit devices, etc., can solve the problems of low control accuracy, poor compensation effect, and high control cost, and achieve high control accuracy, elimination of voltage fluctuations, Overcome the effect of three-phase imbalance

Inactive Publication Date: 2018-10-09
江苏伊莱尔电力科技有限公司
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Problems solved by technology

[0003] The existing active power filter control device has complicated principle, high control cost, low control precision and poor compensation effect

Method used

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Embodiment Construction

[0020] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0021] see Figure 1-3 , the present invention provides a technical solution: an active power filter control method, comprising the following steps:

[0022] A. The voltage sensor and the current sensor collect the voltage and current signals of the grid respectively;

[0023] B. The collected voltage / current signal is conditioned and sent to the main control chip for processing;

[0024] C. The harmonic analysis module detects and analyzes the harmonic sign...

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Abstract

The invention discloses an active power filter control method which comprises the following steps that: A, a voltage sensor and a current sensor respectively acquire voltage and current signals of a grid; B, the acquired voltage / current signals are sent to a main control chip to be processed after being conditioned; C, a harmonic analysis module carries out detection and analysis on a grid harmonic signal; D, if the grid harmonic signal is detected out, a compensation control device is triggered to carry out harmonic control; and E, simultaneously, the main control chip controls a harmonic compensation module to carry out harmonic compensation. The control method adopted by the invention is simple to operate, low in cost and high in control accuracy and can reach an excellent harmonic suppression effect.

Description

technical field [0001] The invention relates to the technical field of filter control, in particular to an active power filter control method. Background technique [0002] With the development of power electronics technology, more and more nonlinear loads such as power electronics are used in industrial and civil applications. Then there are new problems. The nonlinear load causes current distortion and injects a large amount of harmonic current into the grid, which affects the power quality. Therefore, the power quality problem has also received more and more attention, and the active power filter is considered to be the main solution to improve the power quality because of its strong ability to compensate harmonic currents. [0003] The existing active power filter control device has complicated principle, high control cost, low control precision and poor compensation effect. Contents of the invention [0004] The purpose of the present invention is to provide a contr...

Claims

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Application Information

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IPC IPC(8): H02J3/01H02J3/18H02J3/26H02J3/12
CPCH02J3/01H02J3/12H02J3/1842H02J3/26Y02E40/20Y02E40/50
Inventor 余志光
Owner 江苏伊莱尔电力科技有限公司
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