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Single-phase Vienna rectifier and control method thereof

A control method and rectifier technology, applied in the field of power electronics, can solve the problems of poor neutral point voltage balance control, large coordinate transformation calculation, poor grid adaptability, etc., and achieve good dynamic response characteristics, simple calculation, and reduced current. The effect of total harmonics

Pending Publication Date: 2020-05-19
SHENZHEN VAPEL POWER SUPPLY TECH
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Problems solved by technology

[0004] On the other hand, the current conventional single-phase vienna converter control methods include SVPWM vector control method, single-cycle control method, etc., but they have complex SVPWM, large amount of coordinate transformation calculations, poor grid adaptability, and neutral point voltage balance control effect. Poor and other shortcomings

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  • Single-phase Vienna rectifier and control method thereof

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[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0045] It should be noted that when a component is referred to as being “connected” to another component, it may be directly or indirectly located on the other component. The terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of technical features.

[0046] A single-phase Vienna rectifier, such as figure 1 As shown, it is externally connected to a single-phase AC power grid, input voltage V_ac, and outputs high-power high-voltage DC voltage,...

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Abstract

The invention discloses a single-phase Vienna rectifier and a control method thereof. The single-phase Vienna rectifier is connected to a single-phase power grid. An input voltage V_ac passes throughan energy storage inductor, a rectifier bridge, an MOSFET tube, a fast recovery diode and a filter capacitor and then outputs a stable high-power direct-current output voltage Vo_dc and a stable current, so that the sizes of the filter capacitor and the energy storage inductor are reduced, and the material cost is reduced; a calculation formula is changed according to positive and negative half cycles of commercial power; a midpoint balance control scheme of a midpoint voltage equalizing ring, a power grid feedforward control method and a voltage outer loop and current inner loop closed-loop tracking power grid control method are adopted, so that the midpoint voltage balance control effect is good, the power grid adaptability is high, the calculation is simple, and the performance of high-power factors and low-current total harmonics is achieved.

Description

technical field [0001] The invention relates to the technical field of power electronics, and more specifically relates to a single-phase Vienna rectifier and a control method thereof. Background technique [0002] With the rapid development of power electronics technology, nonlinear switching power supplies inject a large number of multiple harmonics into the power grid, and severely distorted grid waveforms may cause electrical equipment failures. Therefore, power factor correction circuits and technologies are increasingly used in in power electronic equipment. [0003] The single-phase Vienna rectifier is a power factor correction rectifier widely used in the communication, electric power, charging pile and other industries. When the existing single-phase Vienna rectifier is connected to the single-phase power grid, the volume of the energy storage inductor and filter capacitor is slightly larger. The cost of materials is slightly higher, and the electrical stress of th...

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Application Information

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IPC IPC(8): H02M7/06H02M1/14H02M1/42
CPCH02M7/06H02M1/14H02M1/4208Y02B70/10
Inventor 王春俊吕志明
Owner SHENZHEN VAPEL POWER SUPPLY TECH
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