Power control and current harmonic compensation method of bidirectional AC/DC converter

A current harmonic and power control technology, applied in AC network to reduce harmonics/ripple, harmonic reduction devices, electrical components, etc., can solve the problems of inability to achieve fast dynamic response, limited current phase transformation control methods, etc.

Active Publication Date: 2020-11-06
HARBIN INST OF TECH
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  • Application Information

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Problems solved by technology

[0005] The present invention is to solve the problem that when the bidirectional AC / DC converter performs mode switching or switching between different quadrant operating states, the current phase conversion control mode is limited, and fast dynamic In response to the problem, a power control and current harmonic compensation method for a bidirectional AC / DC converter is now provided

Method used

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  • Power control and current harmonic compensation method of bidirectional AC/DC converter
  • Power control and current harmonic compensation method of bidirectional AC/DC converter
  • Power control and current harmonic compensation method of bidirectional AC/DC converter

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specific Embodiment approach 1

[0048] Specific implementation mode one: refer to Figure 2 to Figure 7 This embodiment will be described in detail. This embodiment is a method for power control and current harmonic compensation of a bidirectional AC / DC converter.

[0049] figure 2 Shown is the single-phase full-bridge bidirectional AC / DC converter topology used. The bidirectional AC / DC converter includes: MOS transistor S1, MOS transistor S2, MOS transistor S3, MOS transistor S4 and capacitor C. S1-S4 are silicon carbide MOS tubes.

[0050] The collector of the MOS transistor S1, the collector of the MOS transistor S3 are connected to one end of the capacitor C and connected to the positive pole of the DC power supply, the emitter of the MOS transistor S2, the emitter of the MOS transistor S4 and the other end of the capacitor C are connected to the DC power supply The negative pole is connected, the emitter of the MOS transistor S1 is connected with the collector of the MOS transistor S2 and used as an...

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Abstract

The invention discloses a power control and current harmonic compensation method for a bidirectional AC / DC converter, and relates to the technical field of power electronic converter control. The invention aims to solve the problems that when a bidirectional AC / DC converter performs mode switching or different quadrant operation state switching, a current phase conversion control mode is limited,and rapid dynamic response cannot be realized. A bidirectional AC / DC converter is used for collecting voltage and current of the alternating current side of the converter at the current moment; a voltage output value, a current axis output value, a current frequency estimation value, instantaneous active power and reactive power are is respectively calculated by using a fast frequency-locked loop;further, a current inner loop reference signal is obtained, and the power of the converter at the next moment is controlled; and the current harmonic of the converter at the next moment is compensated by using the current inner loop reference signal, the current and the current frequency estimation value. The method is suitable for the field of bidirectional AC / DC converter control.

Description

technical field [0001] The invention belongs to the technical field of power electronic converter control. Background technique [0002] With the development of various renewable energy generation technologies and power line carrier communication technologies, energy routers have begun to play an increasingly important role in the fields of integrated information transmission and grid connection of new energy generation forms. As a "communication" bridge between the DC bus and the AC bus of the energy router, the bidirectional AC / DC converter plays a vital role in active and reactive power control and current harmonic control. However, due to the intermittency and volatility of renewable energy and the complexity and unknownness of various types of nonlinear loads connected to the power router, the bidirectional AC / DC converter has limited power control and harmonic control. The performance is limited, which seriously restricts the mass production and use of energy routers ...

Claims

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Application Information

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IPC IPC(8): H02J3/32H02J3/01H02J3/46
CPCH02J3/32H02J3/322H02J3/01H02J3/46Y02E40/40
Inventor 孙鹏飞周岩刘晓胜徐殿国
Owner HARBIN INST OF TECH
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