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Voltage Source PWM Rectifier with Storage Device Based on Direct Power Control

A power control and rectifier technology, which is applied in the direction of output power conversion device, AC power input conversion to DC power output, high-efficiency power electronic conversion, etc., can solve the problems of slow dynamic response and other problems, achieve rapid output power change, improve power factor, enhancing the effect of decoupling control

Active Publication Date: 2022-05-13
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no power storage device in the prior art, and the dynamic response to the load power demand is slow

Method used

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  • Voltage Source PWM Rectifier with Storage Device Based on Direct Power Control
  • Voltage Source PWM Rectifier with Storage Device Based on Direct Power Control
  • Voltage Source PWM Rectifier with Storage Device Based on Direct Power Control

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Embodiment Construction

[0024] Reference will now be made in detail to specific embodiments of the invention. While the invention will be described in conjunction with specific embodiments, it will be understood that it is not intended to limit the invention to the described embodiments. On the contrary, it is intended to cover alterations, modifications and equivalents as included within the spirit and scope of the invention as defined by the appended claims. It should be noted that the method steps described here can all be realized by any functional block or functional arrangement, and any functional block or functional arrangement can be realized as a physical entity or a logical entity, or a combination of both.

[0025] In order to enable those skilled in the art to better understand the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0026] Note: the example to be introduced next is on...

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Abstract

The invention discloses a voltage-type PWM rectifier with a power storage device based on direct power control, which realizes the compensation effect of the power storage device on the output power of the rectifier. The circuit is based on the block diagram of the three-state direct power control system, and a power storage device with a DC chopper is added to the DC end of the rectifier bridge. The output power of the power storage device is affected by the instantaneous output power of the rectifier, and the duty cycle of the DC chopper is affected by the DC terminal voltage. Advantages: Under the premise that the output voltage is consistent with the DC terminal voltage of the rectifier bridge, the output power of the compensation voltage source is insufficient to meet the target output power of the load. Moreover, the output power of the power storage system changes more rapidly, and the output power of the rectifier and power storage device is balanced and stable with the load power during the transient adjustment process.

Description

technical field [0001] The invention relates to the technical field of power electronic rectifiers, in particular to a voltage-type PWM rectifier with a power storage device based on direct power control. Background technique [0002] Traditional power is based on the sinusoidal conditions of voltage and current, and is defined by effective value. With the development of power electronics technology, nonlinear load characteristics are gradually increasing. Traditional power defined based on effective value cannot analyze nonlinear power characteristics well. It is also not conducive to real-time power control based on fast-response converters. The instantaneous power theory can accurately and instantaneously analyze and control the power. At present, the domestic control strategy for power conversion devices is mainly direct power control strategy (DPC). DPC adopts the control structure of power inner loop and voltage outer loop, and compares the given with the actual activ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M7/219H02M1/42H02J3/24
CPCH02M7/219H02M1/4216H02J3/24Y02B70/10
Inventor 叶兵清郭家玮郭浩然吴佳璇于兵张天宏
Owner NANJING UNIV OF AERONAUTICS & ASTRONAUTICS