Energy feeding type electrical energy mass perturbance generating device

A power quality disturbance generation device technology, applied in the direction of measuring devices, measuring electrical variables, output power conversion devices, etc., can solve the problems of high cost, long test cycle, and difficulty in unifying test environment standards, so as to save electric energy and reduce required effect

Inactive Publication Date: 2008-08-27
SOUTHEAST UNIV
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  • Abstract
  • Description
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Problems solved by technology

Therefore, the test cycle is long, the cost is high, a

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  • Energy feeding type electrical energy mass perturbance generating device
  • Energy feeding type electrical energy mass perturbance generating device
  • Energy feeding type electrical energy mass perturbance generating device

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[0018] The accompanying drawings are embodiments of the present invention. The content of the present invention will be further described below in conjunction with the accompanying drawings:

[0019] The device includes a harmonic source 1, a feedback link 2, an intermediate DC capacitor 3, a control terminal 4, a first LCL filter link 5, and a second LCL filter link 6. The control terminal 4 is implemented by a DSP controller, which is based on user settings. A control signal is always generated to control the harmonic source part to generate current disturbances; the harmonic source 1 and the feedback link 2 are cascaded through a 3-phase intermediate DC capacitor to form an AC-DC-AC topology to realize energy feedback; harmonic source 1 AC The AC side of the feedback link 2 is connected to the power grid through the first LCL filtering link 5, and the AC side of the feedback link 2 is connected to the power grid through the second LCL filtering link 6.

[0020] 1. Harmonic sour...

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Abstract

The present invention discloses an energy-feedback type power quality disturbance generating device, which relates to a power quality disturbance generating device. The device comprises a harmonic source (1), a feedback link (2), a middle direct current capacitor (3), a control terminal (4), a first LCL filtering link (5), and a second LCL filtering link (6). The control terminal (4) adopts a DSP controller to realize that a control signal which is generated according to the setting of a user controls the harmonic source to partially generate current disturbance. The harmonic source and the feedback link are cascaded via the middle direct current capacitor to form an AC-DC-AC topological structure so as to realize power feedback. The alternating current side of the harmonic source is connected with a power network via the first LCL filtering link. The alternating current side of the feedback link is connected with the power network via the second LCL filtering link. The device is capable of simulating harmonic current, active current, inductance reactive current or capacitive reactive current of a plurality of combination frequencies, and the device is capable of simulating various working conditions of a plurality of nonlinear loads such as electric arc furnaces, medium frequency furnaces, welding machines and frequency converters, etc.

Description

technical field [0001] The invention relates to a power quality disturbance generating device and an inverter energy feeding technology, and belongs to the field of harmonic detection and control equipment performance testing of electric power systems. Background technique [0002] The continuous increase of non-linear loads such as various power electronic equipment, electric arc furnaces and electric traction locomotives in the power system makes the power quality worsen day by day. With the continuous research on power quality issues and the development of power electronics technology, power quality testing instruments and various power quality compensation devices have been developed rapidly. How to test the performance of these devices conveniently and quickly before they are officially put into operation is extremely important. important. [0003] At present, some laboratories specializing in the study of power quality, such as the power quality laboratory of Wichita ...

Claims

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Application Information

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IPC IPC(8): G01R31/00G01R31/42H02M5/458
Inventor 王宝安汪楠楠黄学良
Owner SOUTHEAST UNIV
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