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Voltage type PWM rectifier with electricity storage device based on direct power control

A technology of power control and rectifier, 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. It can solve the problems of slow dynamic response and achieve rapid output power change and enhanced solution. Coupling control, improve the effect of power factor

Active Publication Date: 2021-07-02
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 type PWM rectifier with electricity storage device based on direct power control
  • Voltage type PWM rectifier with electricity storage device based on direct power control
  • Voltage type PWM rectifier with electricity 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 direct power control-based voltage-type PWM rectifier with an electricity storage device. The compensation effect of the electricity storage device on the output power of the rectifier is realized. According to the circuit, on the basis of a three-state direct power control system block diagram, an electricity storage device with a direct current chopper is additionally arranged at the direct current end of a rectifier bridge. The output power of the power storage device is influenced by the instantaneous output power of the rectifier, and the duty ratio of the DC chopper is influenced by the DC end voltage. The method has the advantages that on the premise that the output voltage is consistent with the direct-current end voltage of the rectifier bridge, the output power of the voltage source is compensated for the part not enough to meet the load target output power. Moreover, the output power of the power storage system changes more quickly, and the output power of the rectifier and the power storage device is balanced and stable with the load power in 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 Applications(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