Three-phase four-wire APF (active power filter) control method based on combination of one-cycle control and SVPWM (space vector pulse width modulation)

A three-phase four-wire, single-cycle control technology, applied in output power conversion devices, electrical components, active power filtering, etc., can solve the problems of large switching loss, complex control structure, and many interval judgment conditions.

Inactive Publication Date: 2018-05-04
LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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Problems solved by technology

[0003] To sum up, the problems existing in the existing technology are: if the three-phase four-arm APF control method adopts SVPWM control, there are many interva

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  • Three-phase four-wire APF (active power filter) control method based on combination of one-cycle control and SVPWM (space vector pulse width modulation)
  • Three-phase four-wire APF (active power filter) control method based on combination of one-cycle control and SVPWM (space vector pulse width modulation)
  • Three-phase four-wire APF (active power filter) control method based on combination of one-cycle control and SVPWM (space vector pulse width modulation)

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[0053] In order to make the object, technical solution and advantages of the present invention more clear, the present invention will be further described in detail below in conjunction with the examples. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0054] The application principle of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0055] Such as figure 1 As shown, the three-phase four-wire APF control method using the combination of single-cycle control and SVPWM provided by the embodiment of the present invention includes the following steps:

[0056] S101: Determine the sector where the voltage vector is located, and select the corresponding two-arm switches and two-phase currents according to the signal generated by the sector where the voltage vector is located;

[0057] S102: DC capacitor voltage V c by...

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Abstract

The invention belongs to the technical field of distributed power supply and micro-grids and discloses a three-phase four-wire APF (active power filter) control method based on combination of one-cycle control and SVPWM (space vector pulse width modulation). The method comprises steps as follows: a sector where a voltage vector is located is judged, and corresponding two-bridge-arm switches and two-phase current are selected according to signals generated in the sector where the voltage vector is located; direct-current capacitor voltage Vc and reference voltage Vref are subjected to subtracted operation, an obtained result is regulated by PI, phase voltage Vp is obtained, the obtained Vp is integrated and then compared with voltage drop of the selected current on a sampling resistor, a control equation is obtained, and on-off of a switch on a three-phase current bridge arm is controlled; on-off of a switch on a zero-line bridge arm is required to guarantee that an APF works in a three-phase four-wire state; zero-line current independently is subjected to current compensation through one-cycle control. According to the method, a harmonic detection circuit can be omitted, and on-offtimes of the switches and switch loss are reduced.

Description

technical field [0001] The invention belongs to the technical field of distributed power supply and micro-grid, and in particular relates to a three-phase four-wire APF control method combining single-cycle control and SVPWM. Background technique [0002] In order to solve the problems of energy shortage and environmental pollution, human beings have accelerated the pace of research on distributed power sources and microgrids. The biggest feature of distributed power is renewable, pollution-free and flexible. In recent years, the microgrid as an effective carrier of distributed power has attracted more and more attention from all over the world. It is generally difficult for large power grids to reach remote and difficult areas such as our army's Tibet, Xinjiang border posts, and independent islands and reefs in the South China Sea. In these areas with better solar and wind energy resources, small independent micro-grids can be built to solve the problem of power supply gua...

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Application Information

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IPC IPC(8): H02J3/01H02M1/15
CPCH02J3/01H02M1/15Y02E40/20
Inventor 杨静左永刚刘宇航易斌袁韬叶盛毛龙波
Owner LOGISTICAL ENGINEERING UNIVERSITY OF PLA
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